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Опубліковано: 8 червня 2024

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  2. Дисертації
  3. Книги
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Статті в журналах з теми "Slimes":

1

İsmail Tosun, Yıldırım, and Fethullah Chichek. "CARRIER FLOTATION BY CHAR SLIME - WASHING OF ŞIRNAK ASPHALTITE SLIMES." Euroasia Journal of Mathematics, Engineering, Natural & Medical Sciences 9, no. 20 (March 25, 2022): 55–64. http://dx.doi.org/10.38065/euroasiaorg.929.

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Şırnak asphaltite slime below 200 micron size is processed. The clean coal products of the column flotation are received with mid-products and shale settlements in the modified column cell in the baffled form. The use of hydrocyclone, agglomerate thickener and wash decantation has been a suitable potential method after the driven and internal loop column flotation. With this method, ultrafine sized oily sludges with high efficiency and low solid rate coal washing are provided. It also enabled highly efficient wastewater treatment as a result of separating the oil with czar foam. Therefore, the method applied in this study can be designed as an optimum wastewater treatment technology for the treatment of oily wastewater in the oil and drilling industry. The aeration process in internal loop column flotation with air jet is widely used in lake water treatment and fresh water treatment. In this study, internal loop carrier column flotation, hydrocyclone overflows and agglomeration process are optimized for coal washing and environmental wastewater treatment. The ash and sulfur contents decreased to a level of 48% ash reduction and a 34% sulphur reduction
2

Kolesnikov, Alexandr, and Alexandr Belkin. "USE OF THE PROCESSED GALVANIC SLIMES AS ONE OF THE RECYCLING OF TECHNOLOGIES." Биосферная совместимость: человек, регион, технологии, no. 1(25) (April 1, 2019): 54–62. http://dx.doi.org/10.21869/23-11-1518-2019-25-1-54-62.

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The analysis of a situation in the sphere of galvanic production recycling is presented in work. Galvanic production is one of the most dangerous sources of environmental pollution. Mainly superficial and under-ground sources are soiled. It occurs because of the large volume of the sewage containing harmful impurity of heavy metals, inorganic acids and alkalis, surfactants and other highly toxic connections and solid waste is formed. Especially because a reagent way of the sewage containing heavy metals in a slightly soluble form. Assessment of harm of chemical components of galvanic slimes is presented. The possibility of slimes processing by hardening in concrete mix as a part of paving slabs is considered. The paving slabs with use of slimes as the painting pigment is offered. The order of carrying out tests for definition of galvanic slimes safety using for production of construc-tion materials (paving slabs) is given. Influence of slimes introduction on mechanical properties of products is shown. The dependence of products color on amount by the entered galvanic slime and possibility of color schemes correction are shown.
3

Lima, Neymayer Pereira, Klaydison Silva, Thiago Souza, and Lev Filippov. "The Characteristics of Iron Ore Slimes and Their Influence on The Flotation Process." Minerals 10, no. 8 (July 30, 2020): 675. http://dx.doi.org/10.3390/min10080675.

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The flotation has been successfully applied to process the iron ore for the particle size (Ps) from 10 µm up to 150 µm. The presence of the slimes (Ps < 10 µm) is harmful on the reverse flotation of quartz, so they are usually prior removed by hydrocyclones. The main effects of the presence of slimes on the flotation are related to the increase on reagents consumption, the froth stability, and decrease on the selectivity. The lower floatability of coarse quartz particles (+74 µm) combined with the presence of slimes, even in small quantities, drastically affect the flotation response. This paper shows a study of characterization of a typical iron ore slime, aiming to create a better understanding of its role on the concentration by flotation. The main characteristics of typical slimes from the Iron Ore Quadrangle in Brazil are the presence of almost 70% of hematite, 25% of quartz, and 5% of kaolinite, as the main silicates gangue minerals. Furthermore, the particle size distribution revealed that 80% of the hematite and the kaolinite are below 20 µm. The affinity between the ultrafine kaolinite of the slimes with the corn starch is harmful to the reverse flotation of quartz, as the starch has an important depressing action over the hematite. The presence of 20% of hematite −20 µm decreased the recovery to the froth of quartz + 74 µm from 97% to 62%, where the slimes coating seems to be the main responsible.
4

Malayoglu, Ufuk, and Safak Gokhan Ozkan. "Effects of Ultrasound on Desliming Prior to Feldspar Flotation." Minerals 9, no. 12 (December 13, 2019): 784. http://dx.doi.org/10.3390/min9120784.

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In this study, the effects of ultrasound on removal of impurities from raw feldspar were investigated by testing with a newly developed flotation cell with various frequency and power intensities prior to multistage feldspar flotation. Particularly, the quality of feldspar concentrates, the volume of removed slimes and the content of impurities were taken into account to reveal the impacts. Two representative feldspar ore samples taken from the Milas-Mugla region in Turkey were separately tested for desliming and flotation by conventional and ultrasonic methods under similar conditions and the results were compared to each other in terms of the quantity and the quality of the removed slimes and the final feldspar flotation concentrate. As a result, during desliming stage by using ultrasound, the volume of removed slimes was reduced by approximately 45% when compared to the conventional slime removal methods. Moreover, the impurity contents were doubled inside slimes when ultrasound was used. These outcomes lead to significant success in terms of reducing losses during the desliming stage and production of high quality feldspar concentrates by froth flotation assisted by ultrasound.
5

Bulatov, K. V., G. I. Gazaleeva, N. A. Sopina, and A. A. Mushketov. "Elaboration and implementation technology of concentration of Magnitogorsk steel-works slime tailings." Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information 77, no. 5 (May 26, 2021): 602–9. http://dx.doi.org/10.32339/0135-5910-2021-5-602-609.

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The problems of processing iron ore tailings of wet concentration plants and wastes with high content of iron, contaminated by oil products are actual from both points of view of ecology and economy. One of the reasons restraining solving the problem is absence of technologies ensuring to involve such wastes into industrial turnover. In the process` of the research, composition and opening degree of ore and non-metallic minerals of concentration slime tailing of Magnitogorsk steel-works (MMK) were studied and technology of their concentration was elaborated. Taking into consideration the contamination of initial slime tailings of MMK, it was proposed to accomplish their preliminary de-sliming to remove vegetable remains and clay slimes by disintegration in a screw-toothed crusher and washing in a spiral classifier. Results of wet magnetic separation (WMS) of the initial slime tailings of MMK, made at JSC “Uralmekhanobr” presented, the slimes having natural coarseness of –2.0+0.0 mm. It was established that WMS at the magnetic field intensity of 1500 Oe ensures effective removal of magnetite, aggregates magnetite-hematite-goetite into magnetic product. Iron content in the magnetite concentrate was varying from 61.5 to 62.6%. For processing of slime tailings of MMK, magnetic separation was proposed by high-gradient magnetic separator with permanent magnets, created specially for these purposes by “ERGA” company. To increase iron extraction degree, it was proposed to apply gravitation methods of concentration of nonmagnetic product, obtained at high-gradient WMS. It enabled to increase iron content in the final magnetite-hematite concentrate up to 59%. A technological diagram of oiled slimes processing presented. Tests with oiled slimes of bottom deposits of metallurgical production under pilot-industrial conditions of MMK exhibited a possibility to obtain additional iron concentrate with total iron content of 62.47% while oil content in it was less 0.3%.
6

Xiong, Tao, Xiangjun Ren, Meifang Xie, Yuhuan Rao, Yongjun Peng, and Luzheng Chen. "Recovery of Ultra-Fine Tungsten and Tin from Slimes Using Large-Scale SLon-2400 Centrifugal Separator." Minerals 10, no. 8 (August 5, 2020): 694. http://dx.doi.org/10.3390/min10080694.

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China is very rich in tungsten and tin resources, but most of them are finely disseminated with gangues, and thus, fine grinding is required for effective separation, which results in the abundant production of ultra-fine tungsten and tin values into slimes and tailings. The SLon centrifugal separator is highly effective in recovering ultra-fine heavy particles, because it operates on the centrifugal acceleration of particles in the flowing film of a few millimeters thick. The recovery of ultra-fine tungsten minerals from a slime assaying 0.22% WO3, in which 81.85% distributed in −40 µm fraction, was investigated using large-scale SLon-2400 centrifugal separator. Under optimized operating conditions, it produced a primary tungsten concentrate assaying 1.65% WO3 at a high recovery of 77.83%. Moreover, it produced a primary tin concentrate assaying 1.56% Sn at a high recovery of 79.85% from a tin slime assaying 0.27% Sn, in which 74.78% Sn was distributed in −40 µm fraction; then, followed by the flotation cleaning process, a final tin concentrate assaying 16.23% Sn with 66.7% recovery was produced. It was particularly noted that in this large-scale centrifugal separator, the three-conical separation drum stuck with abrasion-resistant ceramic slices on its inner surface played a key role for achieving high constant separation performance. It was concluded that the SLon centrifugal separator has important application prospects for high-efficient recovery of ultra-fine heavy minerals from slimes and tailings.
7

Han, Chulwoong, Young-Min Kim, Seong Ho Son, Hanshin Choi, Tae Bum Kim, and Yong Hwan Kim. "Recovery Of Valuable Metals In Tin-Based Anodic Slimes By Carbothermic Reaction." Archives of Metallurgy and Materials 60, no. 2 (June 1, 2015): 1213–16. http://dx.doi.org/10.1515/amm-2015-0100.

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Abstract This study investigated the recovery of anodic slimes by carbothermic reaction in the temperature range of 973~1,273K and amount of carbon as a function of time. Tin anodic slime samples were collected from the bottom of the electrolytic cells during the electro-refining of tin. The anodic slimes are consisted of high concentrated tin, silver, copper and lead oxides. The kinetics of reduction were determined by means of the weight-loss measurement technique. In order to understand in detail of carbothermic reaction, thermodynamic calculation was carried out and compared with experiments. From thermodynamic calculation and experiment, it was confirmed that Sn-based anodic slime could be reduced by controlling temperature and amount of carbon. However, any tendency between the reduction temperature and carbon content for the reduction reaction was not observed.
8

Oh, Suho, and Jina Park. "Necklaces and slimes." Discrete Mathematics 343, no. 8 (August 2020): 111847. http://dx.doi.org/10.1016/j.disc.2020.111847.

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9

Tatiana Nadryhailo, Viktor Vernyhora, and Angelika Kosenko. "THE PROCESS OF SEDIMENTATION OF SOLID PARTICLES OF THE GRINDING SLUDGE." World Science 1, no. 12(40) (December 30, 2018): 13–17. http://dx.doi.org/10.31435/rsglobal_ws/30122018/6262.

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Thousands of tons of grinding slimes are formed every month at the mechanical engineering enterprises (especially at bearing plants) and metallurgy ones, which are processing metals. Slimes are practically not processed at present, but exported to special landfills or dumps, worsening the environment. Slimes of abrasive metal processing can be a raw material base for powder metallurgy, as they contain 60-80% of metal particles. It is necessary to carry out the solid particles separation by density process at the slimes washing stage to increase the homogeneity of metal powder, which is extracted from grinding slimes of abrasive metal processing. The fluid flow consumption through the vertical nozzles, which allow keeping solid particles in a suspended state, is determined in this work on the basis of theoretical studies of the solid particles deposition process of grinding slimes.
10

Ipinza, J., J. P. Ibáñez, F. Vergara, and A. Pagliero. "Anodic slimes formation in copper electrowinning." Revista de Metalurgia 40, no. 1 (February 28, 2004): 13–20. http://dx.doi.org/10.3989/revmetalm.2004.v40.i1.238.

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Статті в журналах Дисертації Книги

Дисертації з теми "Slimes":

1

Tawil, Marc Rami. "Engineering properties of iron mine slimes for tailings dam stability." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/10775.

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2

Espinosa, Gómez Rodolfo. "Recovery of pyrochlore from slimes discarded at Niobec by column flotation." Thesis, McGill University, 1987. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=75946.

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The Niobec concentrator recovers niobium minerals (principally pyrochlore) from carbonate and silicate gangue. In the process some 15% of the Nb is rejected in a slimes ($-$10 $ mu$m) product. Recovery of pyrochlore from the slimes was studied. The study was performed using plant water which contained about 200 ppm Ca, 100 ppm Mg and variable quantities of organics as the main contaminants. Selective pyrochlore collectors and selective silicate depressants were evaluated. Four possible routes to float pyrochlore selectively were found. All routes required prior carbonate flotation. Carbonate flotation was attempted using fatty acids and sodium silicate dispersant (as conducted at Niobec) in a flotation column. However, pyrochlore also floated as a result of inadequate dispersion of the slimes. Therefore, new dispersants were tested, which proved effective only at high concentration, because reaction with Ca and Mg cations in the water. High dispersant concentration caused carbonate depression.
An additional problem in the flotation column was bubble coalescence and collapse of the froth. This was caused by the fatty acids, enhanced by the high dispersant concentration.
A novel method of quantifying coalescence using the change in gas holdup in the column was developed. A stable froth could be made at high fatty acid emulsifier concentration, but his promoted unselective flotation. Only by working at high percent solids (10% vs 1%) could sufficient emulsifier be introduced into solution without exceeding the dosage (per unit mass of solids) above which flotation is unselective. For such high percent solids work must be conducted at plant site. Preliminary plant column work was encouraging.
Extensive testwork on very fine feeds (80% $-$20 $ mu$m) at Niobec, and at Mt Isa Mines (Australia) confirmed that column flotation is ideal for selective flotation of fines principally due to reduced gangue entrainment.
3

González, Domínguez José Alberto. "Electrochemical processes within the slimes layer of lead anodes during Betts electrorefining." Thesis, University of British Columbia, 1991. http://hdl.handle.net/2429/30919.

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In the Betts process for lead electrorefining the noble impurities originally present in the bullion form a strong and adherent layer of slimes. Within this layer the established ionic concentration gradients can lead to secondary reactions. The following processes were analyzed from a thermodynamic perspective: (A) hydrolysis of the acid (B) precipitation of secondary products (C) reaction of noble compounds. The nature of the concentration gradients within the slimes layer and related secondary processes was studied by using transient electrochemical techniques which include: (A) current interruption, (B) AC impedance, and (C) a variation of SACV (Small Amplitude Cyclic Voltammetry). These studies were complemented by: (A) physico-chemical data on electrolyte properties, (B) "insitu" and "industrially recovered" slimes electrolyte compositions, (C) SEM and X-ray diffraction analysis of the slimes layer. For comparison purposes the electrochemical behaviour of "pure" Pb electrodes was also studied. Upon current interruption the anodic overpotential decays, first abruptly, (as the uncompensated ohmic drop disappears) and then slowly (due to the presence of a back E.M.F. created by ionic concentration gradients that decay slowly). Current interruption measurements showed that: (A) concentration gradients exist across the slimes layer, (B) inner solution potentials within the slimes layer can be larger than those measured from reference electrodes located in the bulk electrolyte, (C) secondary products can shift the inner solution potential to negative values which reverse upon re-dissolution and (D) ionic diffusion is seen upon current interruption but it is complex and difficult to model due to the presence of processes that can support the passage of internal currents. The anodic polarization components were obtained by analyzing the potential and current dependance upon application of a small amplitude sinusoidal waveform. This dependance was found to be linear in the low overpotential region (< 250mV). Thus, upon subtraction of the uncompensated ohmic drop, the remaining polarization is due to the "apparent" ohmic drop of the slimes electrolyte and to liquid junction and concentration overpotentials. These components are directly linked to the electrolysis conditions and to the slimes layer structure. Furthermore, the ratio of these components can be used to obtain the point at which the precipitation of secondary products starts. Changes in this ratio can also be related to the anodic effects caused by the presence of addition agents. AC impedance measurements performed in the presence of a net Faradaic current showed that the impedance increases uniformly as the slimes layer thickens up to the point at which noble impurities start to react. Three electrical analogue models were used to describe the impedance spectra. A steady-state mathematical model that predicts concentration and potential gradients across the slimes layer was developed. Only when a position dependent eddy diffusion term was incorporated in the numerical solution, were reasonable local ionic concentrations and overpotentials obtained.
Applied Science, Faculty of
Materials Engineering, Department of
Graduate
4

Vermeulen, Nicolaas Johannes. "The composition and state of gold tailings." Pretoria : [s.n.], 2006. http://upetd.up.ac.za/thesis/available/etd-03102006-122937/.

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5

Molebiemang, G. M. "Development of a beneficiation route to upgrade Sishen iron ore jig slimes for iron making." Thesis, n/a, 2017. http://hdl.handle.net/10352/403.

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A dissertation submitted in fulfilment of the requirements for the Magister Technologiae: Engineering: Metallurgical
Kumba Iron Ore’s Sishen mine is located in South Africa’s Northern Cape Province and produces about 40 million tons (Mt) of iron ore per annum. The ore body consists mainly of laminated and massive type hematite ore of which 30 Mt is being beneficiated by Dense Medium Separation (DMS), while the remaining 10 Mt is processed by the jig plant that was added as an expansion to the DMS processing route. The jigs at the jig plant are employed to treat coarse, medium and fine Run of Mine Ore (ROM). Due to the presence of finer particles on the screened ROM, hydrocyclones are employed on the secondary screen that feed the finer jig to produce fines on the overflow that is fed to the thickeners for dewatering by sedimentation, and the formation of clear liquid that can be recycled to the Jig plant. However, it was suspected that a substantial amount of the iron gets lost to the hydrocylone overflow with slimes. These slimes consist of very fine particles (about 90%-45μm) which make treatment with gravity concentration methods difficult. Sishen mine attempts to beneficiate the slimes using Pulsating High Gradient Magnetic Separators (PHGMS). However, PHGMS produce a concentrate consisting of 64.0% iron and 5.0% silica which render the slimes not suitable for pelletizing. Normally the slimes are considered as waste and are rejected to the slimes ponds. Rejecting slimes is not only a loss of resources, but it also poses severe long-term environmental problems. Recovery of iron minerals from the tailings produced in a large iron ore operation is of importance as it will result in environmental and economic benefits which indicate the importance of utilising those accumulated fines.
n/a
6

Chikusa, Chimwemwe Mainsfield. "Pollution caused by mine dumps and its control." Thesis, Rhodes University, 1994. http://hdl.handle.net/10962/d1005603.

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All mine dumps are a point source of either physical, chemical or both forms of pollution. Physical pollution includes the physical site coverage of the dump, slumping of parts of the dams and dust that may originate from it (air pollution). Chemical pollution from, or related to the mine dumps include the dominant acid drainage (which contains heavy metals), radioactivity, electromagnetic radiation, noise and chemicals released from the mineral processing stage. In one way or the other, exposure to these pollution forms is detrimental to the human health and his environment. It is this fact that urges the public, government and the responsible mining companies to find ways of monitoring the pollution and stopping it, preferably at the source. Where it can not be stopped, techniques of reducing it, or containing it have been, and are still being developed. Personal protection is the priority. Pollution exposure to the general public is minimised as much as possible. Pollution control techniques that employ less expensive, natural, self-sustaining elements suitable for the environment such as wetlands and vegetation are recommended. The artificial short term and often expensive alternatives are of secondary priority. However, choice of which technique to use is based on the merit of each problem, knowing that chemicals act faster but are effective for a short period as compared to the natural systems. Pollution management is the critical part of the whole process. This involves decision making on courses of action and financial allocation on the part of both the polluter and the monitoring department/agent. The ability to effectively manage pollution programmes is achieved these days with the aid of computers. It is emphasised that pollution control should be handled in an integrated, multi-disciplinary approach manner. This is because pollution is a question of life and death, hence every individual remains accountable to it. Keeping the public and the concerned parties educated, informed and welcoming their concerns on the environmental issues related to the mine dumps generated in a mining venture is essential in the modern days of environmental public awareness, or otherwise face the public lath.
7

Abrahams, Jamie-Leigh Robin. "Geochemistry of Gold One tailings and associated contaminant transport into the Randfontein area, Witwatersrand Basin." University of the Western Cape, 2017. http://hdl.handle.net/11394/6376.

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Magister Scientiae - MSc (Earth Science)
The city of Randfontein, in the Witwatersrand, hosts several slimes and tailings storage facilities which pose potential threat to the environment in the form of acid mine drainage (AMD). The latter, readily scavenges toxic metals, contaminating surrounding soils and water resources, thereby potentially compromising the overall environmental- and public health of the area. To this end, three slimes sections (section T001, T002 and T003) from the Gold One Millsite Slimes Complex were investigated, with the aim of understanding metal release from the slimes dam into the Randfontein area. To achieve this, the mineralogical and geochemical factors controlling metal release were investigated using combined core log analysis, cluster and discriminant analysis, x-ray diffraction analysis, bulk geochemical analysis, acid base accounting methods and selective sequential extraction procedures.
8

Аблєєва, Ірина Юріївна, Ирина Юрьевна Аблеева, Iryna Yuriivna Ablieieva, Леонід Дмитрович Пляцук, Леонид Дмитриевич Пляцук, Leonid Dmytrovych Pliatsuk та Д. Ю. Москаленко. "Комплексний підхід до вирішення проблеми утилізації нафтових шламів". Thesis, Сумський державний університет, 2017. http://essuir.sumdu.edu.ua/handle/123456789/63361.

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Проблема впливу підприємств нафтогазової промисловості на стан атмосферного повітря, поверхневих та підземних вод, ґрунтово-рослинного покриву не втрачає актуальності і на сьогодні. Нафтова промисловість в силу специфіки своєї діяльності є потенційно небезпечною для довкілля. Це обумовлено токсичністю вуглеводнів, що видобуваються із супутніх їм речовин, та відносяться до 3–4 класів небезпеки.Мета роботи полягає у підвищенні рівня екологічної безпеки територій за рахунок впровадження раціональної комплексної системи поводження з відходами нафтопереробки.
9

Шкоп, А. О. "Закономірності процесів розділення шламових вод з полідисперсною твердою фазою в осаджувальних центрифугах". Thesis, Сумський державний університет, 2017. http://essuir.sumdu.edu.ua/handle/123456789/52408.

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Дисертаційну роботу присвячено виявленню закономірностей процесів розділення шламових вод з полідисперсною твердою фазою в осаджувальних центрифугах. В роботі всебічно досліджено вплив концентрації і дисперсного складу на міцність флокул при механічному впливі. Встановлено, що залишкова швидкість осадження флокул після механічного впливу при постійній витраті флокулянта має найбільше значення при концентрації твердої фази в шламі в інтервалі 7 – 30 г/дм3. Найкращі результати у всіх дослідах отримані при концентрації твердої фази, яка дорівнює 10 г/дм3. Виявлено, що при концентрації до 7 г/дм3 і понад 30 г/дм3 спостерігається утворення флокул, що володіють найменшою залишковою швидкістю після механічного впливу. Із зростанням вмісту частки твердої фази крупністю 40 – 100 мкм понад 15 % зростає міцність флокул, які зберігають свою форму і достатньо високу швидкість осадження навіть після механічних впливів. Одержані дані дозволяють рекомендувати коректування складу шламу перед введенням флокулянта як за концентрацією, близькою до оптимальної, так і за вмістом частки класу крупністю 40 – 100 мкм понад 15 %. Показано, що із зростанням концентрації твердої фази у згущеному шламі понад 140 – 150 г/дм3 істотно зменшується міцність агрегатів до механічних впливів.
Диссертационную работу посвящено выявлению закономерностей процессов разделения шламовых вод с полидисперсной твердой фазой в осадительных центрифугах. В работе всесторонне исследовано влияние концентрации и дисперсного состава на прочность флокул к механическим воздействиям. Установлено, что остаточная скорость осаждения флокул после механического воздействия при постоянном расходе флокулянта имеет наибольшее значение при концентрации твердой фазы в шламе в интервале 7–30 г/дм3. Наилучшие результаты во всех опытах получены при концентрации твердой фазы, равной 10 г/дм3. Выявлено, что при концентрации до 7 г/дм3и свыше 30 г/дм3 наблюдается образование флокул, обладающих наименьшей остаточной скоростью после механических воздействий. С ростом содержания доли твердой фазы крупностью 40–100 мкм свыше 15 % возрастает прочность флокул, которые сохраняют свою форму и достаточно высокую скорость осаждения даже после механических воздействий. Разработаны рекомендации по выбору технологических параметров обезвоживания шламовых вод различных производств в осадительных шнековых центрифугах с использованием химического усиления флокулянтами агрегатообразования полидисперсных шламов. Полученные данные позволяют рекомендовать корректировку состава шлама перед вводом флокулянта как по концентрации, близкой к оптимальной, так и по содержанию доли класса крупностью 40–100 мкм свыше 15 %. Показано, что с ростом концентрации твердой фазы в сгущенном шламе свыше 140–150 г/дм3 существенно уменьшается прочность агрегатов к механическим воздействиям. Это позволяет рекомендовать сгущать шлам до заданной величины. Предложены пути минимизации механических воздействий на сфлокулированный шлам в центрифуге. В частности, предложен способ модернизации конструкции центрифуги, заключающийся в том, что вдоль боковой поверхности трубы питания выполнены каналы, направленные тангенциально к боковой поверхности трубы питания таким образом, чтобы направление течения суспензии из каналов совпадало с направлением вращения ротора. В результате такой подачи только малая часть потока испытывает сдвиговые напряжения. Другим направлением, снижающим механические воздействия на флокулы является установка в барабане разгонной втулки с направляющими трубками, препятствующими разбрызгиванию суспензии. В результате этих рекомендаций разработана усовершенствованная конструкция осадительной центрифуги, обладающая при соблюдении оптимальных условий флокуляции высокой степенью удаления твердой фазы, возможностью получения осадка относительно низкой влажности, а также низким расходам энергии на процесс.
The thesis is concerned with conformities to the law of processes of division of slime waters with a polydispersed hard phase in decanting centrifuges. The influence of concentration and dispersible composition on durability of floccules to mechanical influences was investigated in detail. The effect of the concentration and disperse composition on the flocculation strength to mechanical influence is investigated. It is found that the residual rate of floccules sedimentation after the mechanical influence at a constant rate of flocculant has a maximum value at a concentration of solids in the slime in the range of 7–30 g/dm3. The best results are obtained in all the experiments at a solids concentration of 10 g/dm3. It is found that at a concentration up to 7 g/dm3 and more than 30 g/dm3, the floccules are formed. They have the lowest residual rate after mechanical influences. With increasing content of the solid fraction of 40 – 100 microns over 15%, the strength of floccules increases. They retain their shape and relatively high sedimentation rate even after mechanical influence. The obtained data allow recommending correction of the slime composition before flocculant injection both the concentration close to the optimum, and the content of size fraction of 40 – 100 microns more than 15%. It was offered that with an increase in the degree of thickening of more than 140–150 g/dm3 the resistance of aggregates to mechanical influence substantially decreases.
10

Theophil, Sebastian Christoph. "Sketching Slides." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät II, 2011. http://dx.doi.org/10.18452/16368.

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Die Entwicklung effizienter Desktop Publishing Systeme wird behindert durch den Mangel an leistungsfähigen, automatischen Layoutalgorithmen. Aktuelle Algorithmen zum Layout ganzer Dokumente oder einzelner Seiten erfordern entweder die Formulierung des Layoutproblems in einer formalen Beschreibungssprache, oder sie benötigen fertige, detaillierte Layouttemplates. Layoutprobleme mit schwacher Semantik lassen sich schlecht in formale Sprachen umsetzen, Layout Templates verschieben den manuellen Aufwand nur vom Endnutzer zum Template Designer. Das erste Ergebnis dieser Dissertation ist ein Layoutalgorithmus, der ein allgemeines Layoutproblem löst, in dem er es als Ressourcenallokationsproblem interpretiert. Die Fläche einer einzelnen Seite ist eine Ressource, die zwischen den visuellen Elementen einer Seite verteilt wird. Das Layoutproblem wird in ein lexikographisches min-ordering Optimierungsproblem übersetzt, das durch lineare Optimierung in Echtzeit gelöst wird. Die Lösungen manuell erzeugter Layoutprobleme sind häufig über- oder unterbestimmt. Wenn das Problem überbestimmt ist, also keine gültige Lösung besitzt, muss der Algorithmus die Lösung finden, die am n\"achsten an der intendierten Lösung ist. Der Algorithmus erkennt nicht eindeutig definierte Probleme mit unbefriedigenden Lösungen und fügt die minimal notwendige Anzahl von Constraints hinzu um das vom Nutzer beabsichtigte Layout zu erzeugen. Das zweite Ergebnis ist die Entwicklung einer intuitiven Benutzerschnittstelle, die es erlaubt, die vorhergehend beschriebenen Layoutprobleme zu erzeugen. Sie verbirgt die Komplexität des Constraintsystems und vermeidet die Komplexität constraint-basierter Grafikanwendungen der Vergangenheit. Diese Benutzerschnittstelle macht formale Beschreibungssprachen und manuell erzeugte Layouttemplates überflüssig. Die Evaluation zeigt, dass die besten Tabellenlayoutalgorithmen keine signifikant besseren Ergebnisse produzieren als der allgemeinere ICBM Layout Algorithmus.
The efficiency of desktop publishing is severely limited by the lack of sophisticated automatic document layout systems. State-of-the-art algorithms either require the input to be written in a description language such as HTML and LaTeX, or to be a manually designed layout template. However, description languages are ill-suited to express layout problems with weak semantics and layout templates shift the burden from the end user to the template designer. The first contribution of this thesis is an algorithm that solves a general class of layout problems by treating them as equitable resource allocation problems. The available document area is a resource that is distributed among inter-element gaps. The layout problem is transformed into a lexicographic min-ordering optimization problem that is solved using linear programming techniques in real-time. If the layout problem is over-constrained, the quality of the solution layout degrades gracefully. The layout algorithm finds the solution layout with the most equitable distribution of constraint errors among the soft layout constraints, i.e., the solution closest to the user''s original intent. Conversely, the layout algorithm detects the under-constrained subproblems that adversely affect the solution layout. It adds the minimal number of constraints required to achieve the fully specified layout problem that is closest to the user''s input. The second contribution is the creation of an intuitive direct manipulation user interface that lets users create the aforementioned class of general constrained layout problems. It hides the complexity of the constraint system and avoids the usability problems that have plagued constraint drawing applications. It eliminates the need of document description languages and manually-created layout templates. In the evaluation, we show that the best state-of-the-art specialized table layout algorithms do not outperform the general ICBM layout algorithm by any significant margin.
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Книги з теми "Slimes":

1

Gross, U. B. Fun Gus slimes the bus. New York: Random House, 1997.

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2

Davis, B. E. Recovery of phosphate from Florida phosphate slimes. Pittsburgh, Pa: U.S. Dept. of the Interior, Bureau of Mines, 1987.

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3

Felix, Rebecca. Cool doughs, putties, slimes & goops: Crafting creative toys & amazing games. Minneapolis, MN: Abdo Publishing, 2016.

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4

Morita, Kisetsu. I've been killing slimes for 300 years and maxed out my level. New York, NY: Yen Press, 2018.

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5

Morita, Kisetsu. I've been killing slimes for 300 years and maxed out my level. New York: Yen Press, 2018.

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6

Guest, R. Gerald. Bibliotheca Guest slide collection. [Toronto?: s.n., 1999.

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7

Guest, R. Gerald. Bibliotheca Guest slide collection. [Toronto?: s.n., 1992.

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8

Maciel, Katia. Slides. Rio de Janeiro: 7 Letras, 2021.

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9

Hirschfield, Laura. Slimed!. Aukland, New Zealand: Shortland, 2001.

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10

VanVoorst, Jenny Fretland. Slides. Minneapolis, MN: Jump!, Inc., 2015.

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Частини книг з теми "Slimes":

1

Hiskey, J. Brent. "Mechanism and Thermodynamics of Floating Slimes Formation." In T.T. Chen Honorary Symposium on Hydrometallurgy, Electrometallurgy and Materials Characterization, 101–12. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118364833.ch8.

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Morris, Tracy T., and Luis G. Navaro. "Autoclave Pressure Oxygen Leaching of Anodic Copper Slimes." In T.T. Chen Honorary Symposium on Hydrometallurgy, Electrometallurgy and Materials Characterization, 91–100. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118364833.ch7.

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3

Rubinstein, Y. B., B. I. Linev, and E. K. Samoylova. "IMPROVEMENT OF THE EFFICIENCY OF FINE COAL SLIMES FLOTATION." In XVIII International Coal Preparation Congress, 979–84. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-40943-6_153.

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4

Hoffmann, J. E., and Bradford Wesstrom. "Hydrometallurgical processing of refinery slimes at Phelps Dodge: theory to practice." In Hydrometallurgy ’94, 69–105. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-1214-7_5.

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5

Bantshi, Alain M., and Peter Makuvise. "Extraction of Gold from Sands and Slimes Tailings Dump from Mazowe Mine, Zimbabwe." In Proceedings of the 3rd Pan American Materials Congress, 507–17. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-52132-9_51.

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6

Chalupa, Marek, Jakub Novák, and Jan Strejček. "Symbiotic 8: Parallel and Targeted Test Generation." In Fundamental Approaches to Software Engineering, 368–72. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-71500-7_20.

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AbstractThe setup of Symbiotic 8 for Test-Comp 2021 brings radical changes in the test generation for property. Similarly as in Symbiotic 7, we generate tests by running our fork of symbolic executor Klee on the analyzed program. Symbiotic 8, however, runs several instances of Klee in parallel. We run one instance of Klee on the original program and, simultaneously, we create one (intentionally unsound) program slice for every program-terminating instruction in the program and run Klee on these slices. Apart from this principal change, we also improved other components of the tool, mainly the program slicer. Further, our fork of Klee now supports symbolic pointer arithmetics and comparison of symbolic addresses.
7

Navarro, Luis, Tracy Morris, and Weldon Read. "Detellurization Process of Copper Anodic Slimes Leach Liquor by Cementation of Tellurium Using Elemental Copper." In T.T. Chen Honorary Symposium on Hydrometallurgy, Electrometallurgy and Materials Characterization, 113–23. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118364833.ch9.

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8

Wang, Shijie. "An Innovative Hydrometallurgical Process for Recovery of Critical and Rare Metals from Copper Anode Slimes." In The Minerals, Metals & Materials Series, 53–59. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-22761-5_6.

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9

Darke, Priyanka, Bharti Chimdyalwar, Sakshi Agrawal, Shrawan Kumar, R. Venkatesh, and Supratik Chakraborty. "VeriAbsL: Scalable Verification by Abstraction and Strategy Prediction (Competition Contribution)." In Tools and Algorithms for the Construction and Analysis of Systems, 588–93. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-30820-8_41.

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AbstractWe present VeriAbsL, a reachability verifier that performs verification in three stages. First, it slices the input code using a combination of two slicers, then it verifies the slices using predicted strategies, and at last, it composes the result of verifying the individual slices. We introduce a novel shallow slicing technique that uses variable reference information of the program, and data and control dependencies of the entry function to generate slices. We also introduce a novel strategy prediction technique that uses machine learning to predict a strategy. It uses boolean features to describe a program to a neural network that predicts a strategy. We use the portfolio of VeriAbs, a reachabiltiy verifier with manually defined strategies. In sv-comp 2023, VeriAbsL verified 227 (Without witness validation.) more programs than VeriAbs, and 475 (Without witness validation.) programs that VeriAbs could not verify.
10

Gross, M., and K. Rudolph. "Characterization of Slimes Produced by Pseudomonas Phaseolicola in Vitro and in Planta, and the Demonstration of the Slime Polysaccharide Alginate in Seven Pseudomonas Syringae Pathovars." In Plant Pathogenic Bacteria, 523–29. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3555-6_109.

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Тези доповідей конференцій з теми "Slimes":

1

Stephenson, David, and Phillimon Odirile. "Water Recovery from Slimes on Debswana’s Mines." In Eleventh International Seminar on Paste and Thickened Tailings. Australian Centre for Geomechanics, Perth, 2008. http://dx.doi.org/10.36487/acg_repo/863_3.

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2

Lima, Neymayer Pereira, Klaydison Carlaile Silva, and Maurício Curi Segato. "IRON ORE SLIMES: CHARACTERIZATION AND ALTERNATIVES OF CONCENTRATION." In 22° Simpósio de Mineração. São Paulo: Editora Blucher, 2023. http://dx.doi.org/10.5151/2594-357x-39906.

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3

Stepanov, Alexey, Yury Simirsky, Ilya Semin, Anatoly Volkovich, Victor Potapov, and Vyacheslav Stepanov. "Characterisation of MR Reactor Pond in NRC “Kurchatov Institute” Before Dismantling Work." In ASME 2013 15th International Conference on Environmental Remediation and Radioactive Waste Management. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/icem2013-96112.

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In this work complex α-, β-, γ-spectrometric research of water, bottom slimes and deposits on walls of the reactor pond and the storage pond of the MR reactor was made. Identify, that the main dose forming radionuclide, during dismantling work on the reactor MR, is Cs-137. It is shown, that specific activity of radionuclides in bottom slimes considerably exceed specific activity of radionuclides in water from ponds, and near to high level radioactive waste. It is detected that decreasing the water level in reactor ponds on 1m, increase the exposure dose rate at a distance 1m from the pond in 2 times. The observed increase in exposure dose rate can be explained by contribution on dose rate the cesium-137 deposed on walls of the storage pond. Effectiveness of cleaning of walls of the pool of storage from deposits by a water jet of high pressure is investigated.
4

Bukliv, Roksoliana, Kostiantyn Blazhivskyi, and Fedevych Vitalii. "Polyacrylamide application for dewatering of clay slimes from halurgy plants by centrifugation." In Chemical technology and engineering. Lviv Polytechnic National University, 2019. http://dx.doi.org/10.23939/cte2019.01.389.

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5

de Mello, Darcy Ramalho, Joceli Maria Giacomini Angelini, Francisco Roberto Reis Franca, Ana Rosa Carrico Lima Duarte, Rosildo Paiva, Eliane Brabo de Sousa, and Ivan Lobato. "Research about the Insulation Performance of Insulators due to Slimes Mitigation Occurrence." In 2008 International Conference on High Voltage Engineering and Application (ICHVE). IEEE, 2008. http://dx.doi.org/10.1109/ichve.2008.4773885.

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6

de Oliveira Filho, Waldyr, Daviely Silva, and Francisco Almeida. "Thickening of iron ore tailings slimes using sub-aerial deposition: field experimental observations." In 16th International Seminar on Paste and Thickened Tailings. Australian Centre for Geomechanics, Perth, 2013. http://dx.doi.org/10.36487/acg_rep/1363_07_oliveira.

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7

Saksonov, M. N. "BIOTESTING METHODS IN ASSESSMENT OF TOXICITY OF BORING SOLUTIONS AND SLIMES AT OIL AND GAS PRODUCTION." In 17th International Multidisciplinary Scientific GeoConference SGEM2017. Stef92 Technology, 2017. http://dx.doi.org/10.5593/sgem2017/14/s06.070.

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8

Alley, Michael, and Harry Robertshaw. "Rethinking the Design of Presentation Slides: Creating Slides That Are Readily Comprehended." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-61889.

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Presentation slides, when designed well, can significantly increase the amount of information that the audience comprehends. However, when the slide has type that can not be quickly read, the audience often gives up on the slide. Moreover, when the slide does not orient well, when the slide has too much information, or when the order of information on the slide is unclear, the audience can easily become confused. Given that these mistakes can prevent the audience from comprehending the presentation’s content, presenters should strive to format slides that can be quickly read, that effectively orient, that have a reasonable amount of information, and that have a clear order of information. Unfortunately, the slide formats that many engineering presenters use do not meet these goals. Presented in this paper are recommendations for the format of presentation slides—specifically, the typography, color, and layout of presentation slides (or overheads). An assumption for these recommendations is that the purpose of the presentation is to communicate technical information efficiently to the audience. Given that assumption, the goal of a slide’s typography is to have type that can be read as quickly as possible. To obtain that goal, this paper recommends a bold sans serif typestyle such as Arial that is at least 18 points. In regard to color, the most important goal is to have colors that can be clearly distinguished from each other. To obtain that goal, this paper recommends either a dark color against a light background or a light color against a dark background. In regard to layout, the goal is to have a slide design for which the audience can quickly discern the point of the slide and then can divide attention between the presenter and the slide as the presenter discusses the slide. To obtain that goal, this paper recommends the national laboratory design of a short sentence headline supported primarily by images. Other reasons exist for choosing this national lab design. Although this paper focuses on how readily that slides following this national lab design can be comprehended, the paper does direct the reader to references that discuss two other reasons for using this national laboratory design: (1) how well the slide design helps the audience remember details, and (2) how persuasive the slide design is.
9

Barnett, Ralph L. "Ladder Slide Out: First Order Analysis." In ASME 1999 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/detc99/rsafp-8865.

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Abstract One of the more important collapse modes for straight, combination, and extension ladders is base slide out; the top of the ladder slides down the support wall as the base slips away from it. Various fundamental models have been used to study this behavior. This paper revisits the analytical solutions associated with these models and describes their implications for the analysis, design, and testing of ladders.
10

Lubke, Roy. "The Contribution to Closure of Spontaneous Restoration of Industrial Slimes Effluent Dams at the Umbogintwini Industrial Complex near Durban, South Africa." In Third International Seminar on Mine Closure. Australian Centre for Geomechanics, Perth, 2008. http://dx.doi.org/10.36487/acg_repo/852_71.

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Звіти організацій з теми "Slimes":

1

Martinez, Melissa. Lab Basics: Semi-Automated Slice Lab. ConductScience, July 2022. http://dx.doi.org/10.55157/cs20220705.

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Brain tissue slices are used to study synaptic function in the brain. Brain slice chambers maintain the slices for experimental examination, allowing investigation into cellular responses, making them suitable for electrophysiological and metabolic measurements. Interface and submerged chambers are common types, differing in how oxygen is supplied to the slice. Semi-automated slice workstations efficiently assess brain tissue slices, supporting multiple slices simultaneously. These workstations include cameras, monitors, and processors to observe tissues effectively. They save time, enhance efficiency, and offer adjustable magnification for focused observations. Semi-automated labs are practical tools for investigating brain tissues in various chamber types.
2

Biek, Robert F., Peter D. Rowley, and David B. Hacker. Utah’s Ancient Mega-Landslides: Geology, Discovery, and Guide to Earth’s Largest Terrestrial Landslides. Utah Geological Survey, December 2022. http://dx.doi.org/10.34191/c-132.

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Southwest Utah contains what may be the largest landslide complex on land in the world. This complex includes three ancient side-by-side gigantic slides that cover an area roughly the size of Yellowstone National Park with a volume of slide debris that would nearly fill the Grand Canyon to its rim. Geologists call it the Marysvale gravity slide complex— “Marysvale” for the namesake volcanic field that partly failed catastrophically three separate times, and “gravity slide” to call attention to a special class of extremely large and geologically complex landslides several tens to thousands of square miles in extent. Here we refer to them simply as mega-landslides or slides—they are larger and far more interesting than geologists could ever have imagined.
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Lippuner, Jonas. Nucleosynthesis outreach slides. Office of Scientific and Technical Information (OSTI), November 2017. http://dx.doi.org/10.2172/1407868.

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4

Mukundan, Harshini. Agnostic Immunity [Slides]. Office of Scientific and Technical Information (OSTI), May 2021. http://dx.doi.org/10.2172/1778724.

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5

Mcclard, David. Wilderness Survival [Slides]. Office of Scientific and Technical Information (OSTI), April 2021. http://dx.doi.org/10.2172/1779634.

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Martinez, Elizabeth. LANL-Amplifier [Slides]. Office of Scientific and Technical Information (OSTI), June 2021. http://dx.doi.org/10.2172/1798114.

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Goda, Joetta. NCERC Capabilities [Slides]. Office of Scientific and Technical Information (OSTI), May 2021. http://dx.doi.org/10.2172/1798104.

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8

Fronzak, Hannah. Community Conversation [Slides]. Office of Scientific and Technical Information (OSTI), July 2021. http://dx.doi.org/10.2172/1805709.

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9

Fryer, Christopher Lee. Institutional Computing Slides on. Office of Scientific and Technical Information (OSTI), June 2015. http://dx.doi.org/10.2172/1183388.

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10

Hurtle, Jackie C., and Darlene T. Trujillo. TRU Corp Board Slides. Office of Scientific and Technical Information (OSTI), January 2018. http://dx.doi.org/10.2172/1418752.

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