Relevant bibliographies by topics / Floatability

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Floatability'

Author: Grafiati
Published: 4 June 2021
Last updated: 6 February 2022

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Journal articles on the topic "Floatability"

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Choi, Junhyun, Joobeom Seo, Sang Bae Kim, and Wantae Kim. "Flotation Behavior of Malachite Using Hydrophobic Talc Nanoparticles as Collectors." Minerals 10, no. 9 (August 27, 2020): 756. http://dx.doi.org/10.3390/min10090756.

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In this study, the flotation behavior of malachite was investigated using hydrophobic talc nanoparticles (TNs) as collectors. To improve the floatability of TN-deposited malachite, various experimental parameters were systematically investigated. We found that the floatability sharply increased as the size of the TNs decreased. The floatability of malachite was enhanced in the presence of smaller TNs, since higher amounts of smaller TNs were deposited on the surface of the malachite, thus rendering the surface more hydrophobic. Moreover, the floatability of the TN-deposited malachite increased as the pH decreased, likely due to the more favorable interaction between TNs and malachite by means of electrostatic attraction. Furthermore, the floatability became more enhanced as the TN concentration increased, likely associated with increases in the amount of TNs deposited on the surface of the malachite, thus enhancing the floatability by altering the hydrophobicity of the surface. Our findings suggest that the application of natural hydrophobic TNs as collectors in malachite flotation should be introduced as a new concept.
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Zhang, Yue Jun, Ming Tan, Tao Wu, and Tian Ran Feng. "Numerical Simulation of Flotation Circuit for Kakoxene Ore Processing." Applied Mechanics and Materials 331 (July 2013): 43–47. http://dx.doi.org/10.4028/www.scientific.net/amm.331.43.

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A group of data from a batch flotation tests were plug into a batch flotation model, and mineral floatability parameters (flotation rate constant, mass fraction of floatability component) were derived from model calculation. Then a flotation circuit of kakoxene ore was designed in JKSimFloat simulator, after inputting those floatability parameters to flotation circuit model, the ultimate grade and recovery of apatite was obtained by analog computation. Meanwhile, the same flotation circuit test was achieved in the laboratory. The apatite grade in concentrate is 66.61% at the recovery of 78.35% by simulation, while apatite grade in concentrate is 72.70% at the recovery of 88.14% in the laboratory tests. Compared with experiment data, the accuracy of simulation is acceptable.
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Khat'kova, A. N., L. G. Nikitina, and S. A. Pateyuk. "Floatability of borogypsum with perlastan." Mining Informational and analytical bulletin 11 (2019): 160–71. http://dx.doi.org/10.25018/0236-1493-2019-11-0-160-171.

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Hakim, Arif Rahman, Wahyu Tri Handoyo, Toni Dwi Novianto, and Andrianto Widi Prasetyo. "Effects of Twin-Screw Extruders Condition to Physical Properties of Floating Fish Feed." Jurnal Perikanan Universitas Gadjah Mada 21, no. 2 (December 30, 2019): 79. http://dx.doi.org/10.22146/jfs.44821.

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Process production of floating fish feed in a society constrained by processing technology. The objective of this study was to observe effect of condition process of twin screw extruders to the physical and chemical properties of produced of floating fish feed. Ingredients used involve fish meal, soybean meal, corn meal, and tapioca flour. The ingredients are mixed with 15, 20 and 25% water added to the total weight. Extrusion process condition conducted by several treatments i.e screw speed (540, 540, 600, 660 rpm) and barrel temperatures (80, 90, 100, 110, 120℃). In order to study, expansion ratio, unit density, floatability and hardness of feed were observed as physical parameters while chemical properties include moisture and protein content. Experimental result showed that addition 25 % water to the formula gives a good performance of expansion ratio, unit density and floatability than 15% and 20% moisture content. Higher of screw speed produces feed with higher ratio expansion, lower unit density, and higher floatability. The optimum of screw speed is 600 rpm. Meanwhile increasing of barrel temperature caused reduction of unit density, and escalation floatability of feed. Best barrel temperature to meet the physical properties is 120℃. The produced feed contain protein 32.38-41.95% and moisture content 4.37-5.70%.
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Suliswati, Lulu, Catur Sriherwanto, and Imam Suja'i. "DAMPAK TEKNIK PENGIRISAN DAN PENCETAKAN TERHADAP DAYA APUNG PAKAN IKAN YANG DIFERMENTASI MENGGUNAKAN Rhizopus sp." Jurnal Bioteknologi & Biosains Indonesia (JBBI) 5, no. 2 (December 26, 2018): 127. http://dx.doi.org/10.29122/jbbi.v5i2.3096.

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Impact of Slicing and Moulding Techniques on the Floatability of the Fish Feed Fermented by Rhizopus sp.ABSTRACTThe use of Rhizopus sp. mycelium as biocoating, biostabilizing, and biofloating agent in the production of floating fish feed through solid fermentation had already been studied as a much simpler alternative to mechanical extrusion. The fermented fish feed, however, had poor floatability in aerated water, probably due to structural damage during the size reduction process of the feed. Thus, this study used alternative size-reducing methods, namely slicing and moulding, to improve the floatability of the fermented feed. Other physical characteristics were also measured and compared to those of commercial sinking and floating fish feeds. Results showed that both the moulded and the sliced fermented-feeds had lower density as well as higher water stability, absorption capacity, floatability, and durability compared to those of the commercial sinking feed used as the fermentation substrate. The hydrophobicity of all the feeds tested were similar, however. The floatability of the fermented feeds obtained in this study was much higher than those of the previous studies. Keywords: floatability, floating feed, sinking feed, water absorption, water stabilityABSTRAKPenggunaan miselium Rhizopus sp. sebagai pelapis permukaan, penstabil, dan pengapung hayati dalam pembuatan pakan ikan apung melalui fermentasi padat telah diteliti sebagai alternatif yang jauh lebih sederhana dibandingkan dengan metode ekstrusi mesin. Namun, pakan ikan fermentasi ini memiliki daya apung yang buruk dalam air bergelembung udara, yang mungkin disebabkan kerusakan struktural selama proses pengecilan ukuran pakan. Karenanya, penelitian ini menggunakan metode lain untuk mengecilkan ukuran, yakni pencetakan dan pengirisan, dalam rangka meningkatkan daya apung pakan yang difermentasi. Karakteristik fisik lainnya juga diukur dan dibandingkan dengan pakan ikan tenggelam dan terapung komersial. Hasil menunjukkan bahwa proses fermentasi serta metode pengecilan dimensi yang digunakan menghasilkan pakan yang memiliki massa jenis lebih rendah, serta stabilitas air, daya serap air, daya apung, serta ketahanan benturan lebih tinggi dibandingkan dengan pakan tenggelam komersial yang digunakan sebagai substrat fermentasi. Namun, nilai hidrofobisitas semua pakan yang diuji adalah sama. Daya apung pakan fermentasi dalam penelitian ini jauh lebih tinggi daripada penelitian sebelumnya.Kata Kunci: daya apung, daya serap air, stabilitas dalam air, pakan apung, pakan tenggelam
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Yin, Wan Zhong, Qiang Li, and Ying Qiang Ma. "Flotation Research on Dolomite-Containing Magnesite Ore." Advanced Materials Research 158 (November 2010): 113–24. http://dx.doi.org/10.4028/www.scientific.net/amr.158.113.

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China has the largest magnesite reserve in the world. However, the high-grade magnesite resources are decreasing significantly with the development of the resources’ consumption. The treatment of the low-grade magnesite ore is becoming more important and of much interest to researchers. In this paper, the floatability of several pure minerals including magnesite, dolomite, and quartz and their interactions when using different collectors were investigated. In the flotation system of lauryl amine, compared with magnesite, the floatability of dolomite was higher, but was much lower than quartz. In the flotation system of sodium oleate, magnesite and dolomite had good floatability but quartz could hardly be floated. Sodium hexametaphosphate inhibited dolomite more strongly than magnesite. When pH was above 9, the inhibitory effect on two minerals was attenuated, and in the pH range of 9~12, the inhibitory effect of sodium silicate on dolomite was very strong, while magnesite still had good floatability. Magnesite and dolomite crystal structure similar and the mass contents of surface oxygen were respectively 52.42, 48.65. relative density that was the ratio of metal cation to anion （∑Mn+/∑O2-）, respectively: 0.3264,0.4327. The mass contents of surface oxygen and relative density affected the surface electric properties, and therefore the isoelectric point of dolomite was higher in solution.Based on crystal chemistry formulas, the Mn+-O2- bond parameters were calculated. The electronegativity of O linked with Ca in dolomite was much higher than that linked with Mg in magnesite and dolomite. Because of the strong electrostatic forces, the floatability of dolomite was higher in the flotation system of lauryl amine. As the solubility product of calcium oleate is bigger, the floatability of dolomite which compared to magnesite is much higher in the flotation system of sodium oleate. After the flotation experiments of pure minerals, a novel flotation system for recovering magnesite concentrate from low-grade magnesite ore was developed. For run-of-mine ore produced in Liaoning China, the results of flotation experiments showed that a magnesite concentrate containing 46.94 percent MgO, 0.30 percent SiO2, 0.76 percent CaO can be produced and 76.02 percent of the magnesite can be recovered through the process.
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Park, Ilhwan, Seunggwan Hong, Sanghee Jeon, Mayumi Ito, and Naoki Hiroyoshi. "Flotation Separation of Chalcopyrite and Molybdenite Assisted by Microencapsulation Using Ferrous and Phosphate Ions: Part II. Flotation." Metals 11, no. 3 (March 7, 2021): 439. http://dx.doi.org/10.3390/met11030439.

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Porphyry-type deposits are the major sources of copper and molybdenum, and flotation has been adopted to recover them separately. The conventional reagents used for depressing copper minerals, such as NaHS, Na2S, and Nokes reagent, have the potential to emit toxic H2S gas when pulp pH was not properly controlled. Thus, in this study the applicability of microencapsulation (ME) using ferrous and phosphate ions as an alternative process to depress the floatability of chalcopyrite was investigated. During ME treatment, the use of high concentrations of ferrous and phosphate ions together with air introduction increased the amount of FePO4 coating formed on the chalcopyrite surface, which was proportional to the degree of depression of its floatability. Although ME treatment also reduced the floatability of molybdenite, ~92% Mo could be recovered by utilizing emulsified kerosene. Flotation of chalcopyrite/molybdenite mixture confirmed that the separation efficiency was greatly improved from 10.9% to 66.8% by employing ME treatment as a conditioning process for Cu-Mo flotation separation.
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Kang, Duan, and Jian Hua Chen. "Effects of Galvanic Interaction on Collectorless Flotation Behavior of Galena and Pyrite." Advanced Materials Research 402 (November 2011): 514–17. http://dx.doi.org/10.4028/www.scientific.net/amr.402.514.

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Galvanic interactions between sulfide minerals have significant effects on their electrochemistry and flotation behavior. The effects of galena and pyrite on their collectorless flotation behavior have been studied in this paper. The results showed that galvanic interaction between galena and pyrite would occur when they were mixed. In the galvanic-couple , pyrite forms a cathode due to the higher rest potential, and is reduced, which results in its floatability decreased; while galena forms a anode due to the lower rest potential, and is oxidized, which results in its floatability increased.
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Welsby, S. D. D., S. M. S. M. Vianna, and J. P. Franzidis. "Assigning physical significance to floatability components." International Journal of Mineral Processing 97, no. 1-4 (November 2010): 59–67. http://dx.doi.org/10.1016/j.minpro.2010.08.002.

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Guo, H., and W. T. Yen. "Pulp potential and floatability of chalcopyrite." Minerals Engineering 16, no. 3 (March 2003): 247–56. http://dx.doi.org/10.1016/s0892-6875(03)00015-3.

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Dissertations / Theses on the topic "Floatability"

1

Holuszko, Maria Ewelina. "Wettability and floatability of coal macerals as derived from flotations in methanol solutions." Thesis, University of British Columbia, 1991. http://hdl.handle.net/2429/29972.

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In this study wettability and floatability of coal petrographic components were examined using the concept of critical surface tension. Two techniques were studied; film flotation and small-scale flotation tests. Both tests use Zisman’s concept of critical surface tension of solids. In these tests particles are separated according to their respective critical surface tension of wettability (film flotation) or critical surface tension of floatability (small-scale flotation). Surface heterogeneity of coal particles arises from the chemical composition of coal surface. The coal macerals are known to have different chemical composition and surface properties. Surface properties of macerals and their flotation response have usually been evaluated with the contact angle or direct flotation tests. In this study, the estimation of surface properties of coal macerals was accomplished by studying their critical surface tension of wettability and floatability. The wettability distributions of coal samples of various petrographic composition were obtained from film flotation. Wettability of petrographic components was evaluated in terms of an average critical surface tension of wettability. In small-scale flotation experiments, coal particles were separated according to their critical surface tension of floatability. Differences in floatability and wettability distributions of coal lithotypes and maceral concentrates are discussed. Microscopic examination of the products from film and small-scale flotations was used to further study the effect of coal petrographic composition on the wettability and floatability.
Applied Science, Faculty of
Mining Engineering, Keevil Institute of
Graduate
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Mishra, Jitendra. "Investigating the role of pulp chemistry on the floatability of the Cu-Ni sulfide ore." Master's thesis, University of Cape Town, 2011. http://hdl.handle.net/11427/13430.

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Includes bibliographical references (leaves 171-182).
In this study, the Magotteaux Mill® system was used in order to control the grinding pulp conditions, consequently surface properties of the minerals, which in turn affect the flotation behaviors.
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Vianna, Sérgio Maurício S. M. "The effect of particle size, collector coverage and liberation on the floatability of galena particles in an ore /." [St. Lucia, Qld.], 2004. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe18153.pdf.

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Galant, Malikaah. "The characterisation of the lead flotation circuit at Black Mountain Mining (Pty) Ltd. using the floatability component model approach." Master's thesis, University of Cape Town, 2015. http://hdl.handle.net/11427/24313.

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Black Mountain Mining (Pty) Ltd. (BMM) is a base metal operation that has been producing chalcopyrite-, galena- and sphalerite-bearing concentrates for over 30 years. Silver is recovered in the concentrates as a result of elemental substitution within the crystal lattice of chalcopyrite and galena minerals. The primary objective of this study was to adapt the Floatability Component Model (FCM) as a simplified proof-of-concept model for the Lead flotation circuit of the BMM Concentrator based on plant- and laboratory-scale data. The model obtained, using the FCM approach in conjunction with the Woodburn and Wallin (1984) methodology, should give insight to the metallurgical team regarding the performance of the circuit based on the data pertaining to the feed characteristics of the Lead flotation circuit. Additionally, as a result of the known association of silver with galena minerals, an objective of the study was to be able to predict the response of silver based on the response of galena minerals. The model for the Lead flotation circuit of BMM Concentrator was developed in a single MS Excel spreadsheet and it was important that the raw data used to develop the model could be obtained easily, inexpensively and in a manner that was not disruptive to the operation.
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Buswell, Andrew Mark. "An electrochemical investigation into the floatability of pyrrhotite." Thesis, 1998. http://hdl.handle.net/10539/22047.

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A dissertation submitted to the Faculty of Engineering, University of the Witwatersrand, in fulfillment of the requirements for the degree of Mastel' of Science in Engineering Johannesburg 1998
Impala's Minerals Processing Plant in the Rustenburg Area, South Africa, uses flotation to beneficiate precious metal bearing ores from the Bushveld Complex. Pyrrhotite is one of the sulphide minerals that is targeted but it is the least amenable to current flotation conditions having the lowest recovery. Electrochemical techniques (mixed potential measurements, cyclic voltammetry and current transient techniques) were used to study the relevant reactions on the surface of pyrrhotite mineral electrodes. Aspects investigated included the oxidation of the mineral in aqueous alkaline solutions, activation by copper sulphate, kinetics of oxygen reduction and the adsorption of isobutyl xanthate. Mixed potential measurements of mineral electrodes were taken in batch flotation test work. In addition a novel qualitative measure of hydrophobicity was investigated. The oxidised surface of pyrrhotite is likely to be covered with iron hydroxides and a sulphur rich sub-lattice. No direct evidence was found for the activation of pyrrhotite by copper sulphate in alkaline solutions. It was shown however that activation could be achieved in mildly acidic media and that the surface remained activated if subsequently exposed to alkaline conditions. When achieved under acidic conditions activation was observed to enhance the degree of interaction between the mineral and the xanthate collector. Also copper sulphate appeared to aid the formation of a more hydrophobic surface (as indicated by the hydrophobicity tests). Copper activation conducted in acidic media did not significantly enhance the kinetics of oxygen reduction, a reaction seen as crucial to the adsorption of xanthate. No evidence was found for the initial chemisorption of xanthate onto the mineral surface. However evidence was found for the oxidation of xanthate to dixanthogen at sufficiently anodic potentials. It Was concluded that the relatively poor flotation performance of pyrrhotite could be combated by minimising the extent of the oxidation, adding reagents as soon as possible before the mineral becomes extensively oxidised and by removing surface hydroxides through lowering the pH during conditioning.
MT2017
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Ansari, Anita. "The effect of lignosulfonates on the floatability of molybdenite and chalcopyrite." Thesis, 2006. http://hdl.handle.net/2429/17724.

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The applicability of six lignosulfonates as selective depressants in chalcopyritemolybdenite separation was assessed by means of modified Hallimond tube flotation tests, supplemented by adsorption studies to determine the magnitude of lignosulfonatemineral interactions. Flotation and adsorption tests were performed as a function of pH using different pH modifiers, i.e. lime, potassium hydroxide (KOH) and soda ash. Size exclusion chromatograms (SEC) were generated to determine which molecular weight fractions of the lignosulfonates were actually adsorbing onto the surfaces of the minerals. The depression of chalcopyrite flotation by lignosulfonates was found to be related to the presence of physically adsorbed xanthate and the availability of metallic sites on the mineral surface. Once the physically adsorbed xanthate was removed from the surface, the depression of the mineral was possible only when lignosulfonates adsorbed onto the mineral. The adsorption process was enhanced by the presence of positively charged metallic sites on the mineral surface. The activating role of calcium ions introduced by lime for lignosulfonate adsorption was demonstrated. The depression of molybdenite flotation was a function of pH. Good flotation of molybdenite was observed only under neutral / weakly acidic pH values, and the addition of all lignosulfonates resulted in the complete depression of molybdenite flotation. As in the case of chalcopyrite, pH adjustments using KOH and soda ash decreased the adsorption of lignosulfonates, which strongly suggests that the lignosulfonate adsorption process was controlled by electrostatic repulsion between the anionic polyelectrolytes and the negatively charged mineral surface. When lime was used as a pH modifier, the adsorption density dramatically increased due to the presence of calcium species in solution. The SEC data indicated that higher molecular weight fractions of lignosulfonates preferentially interact with mineral surfaces. Overall, the results suggest that it is possible to selectively float chalcopyrite from molybdenite by depressing molybdenite. This can be achieved over a wide pH range provided that a pH modifier other than lime is used for pH control. It is suggested that this process option be used in a cleaner flotation stage where pulp dilution and the use of flotation columns could greatly enhance the selectivity of the process.
Applied Science, Faculty of
Mining Engineering, Keevil Institute of
Graduate
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Books on the topic "Floatability"

1

Tennant, Cathy. Pyrrhotite floatability studies by contact angle measurements. Sudbury, Ont: Laurentian University, School of Engineering, 2001.

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Hermas, Ahmed N. Effect of microwave-preconditioning on the grindability and floatability of copper-nickel ore. Sudbury, Ont, 2004.

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Book chapters on the topic "Floatability"

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Hu, Yuehua, Wei Sun, and Dianzuo Wang. "Natural Floatability and Collectorless Flotation of Sulphide Minerals." In Electrochemistry of Flotation of Sulphide Minerals, 20–52. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-92179-0_2.

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Pomianowski, A., J. Rodakiewicz-Nowak, and G. Para. "Surface Activity of Garboxylic Acids and Mercury Floatability." In Surfactants in Solution, 467–77. Boston, MA: Springer US, 1989. http://dx.doi.org/10.1007/978-1-4615-7990-8_36.

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Francescutto, Alberto, and Apostolos D. Papanikolaou. "Floatability and Stability of Ships: 23 Centuries after Archimedes." In The Genius of Archimedes -- 23 Centuries of Influence on Mathematics, Science and Engineering, 277–88. Dordrecht: Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-90-481-9091-1_19.

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Chudacek, M. W. "Determination of Floatability Data Using the Emdee™ Microflot Method." In Innovations in Flotation Technology, 291–94. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2658-8_13.

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Para, G., A. Pomianowski, and J. Rodakiewicz-Nowak. "Bubble Size Distribution and Mercury Floatability in Solutions of Carboxylic Acids." In Surfactants in Solution, 479–85. Boston, MA: Springer US, 1989. http://dx.doi.org/10.1007/978-1-4615-7990-8_37.

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Afolabi, Ayo Samuel, Edison Muzenda, and Saka Ambali Abdulkareem. "Effect of pH on the Floatability of Base Metal Sulphides PGMs." In Lecture Notes in Electrical Engineering, 239–48. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-4786-9_19.

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Raatz, S. "The Influence of Multivalent Cations on the Floatability of Scheelite, Fluorite and Calcite." In Innovations in Flotation Technology, 419–25. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2658-8_21.

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Laskowski, Janusz S. "Chapter 4 Coal floatability." In Coal Flotation and Fine Coal Utilization, 95–110. Elsevier, 2001. http://dx.doi.org/10.1016/s0167-4528(01)80006-5.

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Chen, Jianhua, Zhenghe Xu, and Ye Chen. "Electronic properties of sulfide minerals and floatability." In Electronic Structure and Surfaces of Sulfide Minerals, 13–81. Elsevier, 2020. http://dx.doi.org/10.1016/b978-0-12-817974-1.00002-8.

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Jiang, Chengliang, Xiang-Huai Wang, J. W. Leonard, and B. K. Parekh. "On the native and induced floatability of coal and pyrite." In Coal Science and Technology, 171–88. Elsevier, 1993. http://dx.doi.org/10.1016/b978-0-444-81476-0.50021-1.

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Conference papers on the topic "Floatability"

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Florena, Fenfen Fenda, Fahmi Syarifuddin, Eko Sulistio Hanam, Nici Trisko, Eko Kustiyanto, Enilisiana, Anton Rianto, and Ghenadi Arinton. "Floatability study of graphite ore from southeast Sulawesi (Indonesia)." In 2ND PADJADJARAN INTERNATIONAL PHYSICS SYMPOSIUM 2015 (PIPS-2015): Materials Functionalization and Energy Conservations. AIP Publishing LLC, 2016. http://dx.doi.org/10.1063/1.4941888.

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Chantouriya, V., I. Filippova, L. Filippov, M. Ryazantseva, and M. Mullet. "Influence of High-Power Electromagnetic Pulses on Surface State and Floatability of Carbonate-Bearing Pyrite and Arsenopyrite." In 3rd France-Russia Seminar. Les Ulis, France: EDP Sciences, 2007. http://dx.doi.org/10.1051/names2007039.

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Chen, Ping, Shumin Zhou, and Ying Shi. "Structure Design and Analysis of a Locking Band Type Quick Opening End Closure Using a New Saddle-Shaped Sealing Ring for Natural Gas Filters." In ASME 2015 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/pvp2015-45449.

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A quick opening closure using a new rubber sealing ring was proposed in this paper, which can be used in natural gas transmission filters. An innovative saddle-shaped sealing ring with the feature of floatability was designed for substituting of traditional rubber C-ring. A lager gap could be allowed between the door and the top flange which made the assembling and disassembling easier than before. The theory of strength calculation and check for the whole steel structure were also presented. For an actual engineering case, a device with internal diameter of DN1550 (62inches) and design pressure of 12.6MPa (1827.5psi) was designed by rule according to Chinese national standard GB150 and analyzed by FEA (ANASYS). In addition, the sealing performance was simulated by FEM analysis (ABAQUS). Finally, the prototype was produced and the experiments for its sealing and load-bearing performance using hydrostatic test and stress test were carried out successfully.
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