Bibliografie tematiche / Froth flotation

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Letteratura scientifica selezionata sul tema "Froth flotation"

Autore: Grafiati
Pubblicato: 4 giugno 2021
Ultima modifica: 29 gennaio 2023

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Articoli di riviste sul tema "Froth flotation"

1

Aldrich, Chris, e Xiu Liu. "Monitoring of Flotation Systems by Use of Multivariate Froth Image Analysis". Minerals 11, n. 7 (25 giugno 2021): 683. http://dx.doi.org/10.3390/min11070683.

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Abstract (sommario):
Froth image analysis has been considered widely in the identification of operational regimes in flotation circuits, the characterisation of froths in terms of bubble size distributions, froth stability and local froth velocity patterns, or as a basis for the development of inferential online sensors for chemical species in the froth. Relatively few studies have considered flotation froth image analysis in unsupervised process monitoring applications. In this study, it is shown that froth image analysis can be combined with traditional multivariate statistical process monitoring methods for reliable monitoring of industrial platinum metal group flotation plants. This can be accomplished with well-established methods of multivariate image analysis, such as the Haralick feature set derived from grey level co-occurrence matrices and local binary patterns that were considered in this investigation.
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2

WAKAMATSU, Takahide. "Froth flotation." Hyomen Kagaku 12, n. 1 (1991): 28–33. http://dx.doi.org/10.1380/jsssj.12.28.

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3

Han, K. N. "Froth flotation". International Journal of Mineral Processing 28, n. 1-2 (febbraio 1990): 152–54. http://dx.doi.org/10.1016/0301-7516(90)90034-v.

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4

Ralston, J. A. "Froth flotation". Minerals Engineering 2, n. 2 (gennaio 1989): 272. http://dx.doi.org/10.1016/0892-6875(89)90049-6.

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5

Yianatos, Juan, Paulina Vallejos, Luis Vinnett e Sebastián Arriagada. "Semi-Continuous Froth Discharge to Reduce Entrainment of Fine Particles in Flotation Cells Subject to Low-Mineralized Froths". Minerals 10, n. 8 (5 agosto 2020): 695. http://dx.doi.org/10.3390/min10080695.

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Abstract (sommario):
An operational strategy is proposed to improve the metallurgical performance of flotation cells subject to low-mineralized froths. This strategy consists of using a semi-continuous discharge into the concentrate, in which the froth is operated under loading and unloading periods. A transient model is developed to evaluate the proposed approach. The model is calibrated using experimental data from two industrial flotation banks. The metallurgical performances of the last cells of these banks are then simulated, considering the semi-continuous froth discharge. The results show that the semi-continuous mode significantly reduces gangue entrainment, improving the concentrate grade while maintaining approximately the same recovery. The semi-continuous strategy demonstrates good potential to enhance the metallurgical indexes under low-mineralized froths, as those in the last cells of rougher flotation banks.
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6

Wang, Lei, e Chao Li. "A Brief Review of Pulp and Froth Rheology in Mineral Flotation". Journal of Chemistry 2020 (8 febbraio 2020): 1–16. http://dx.doi.org/10.1155/2020/3894542.

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Abstract (sommario):
In mineral flotation, rheological problems have limited the efficient upgrading of low-grade and complex ores. Since pulp and froth rheology are deemed to play different roles in influencing the separation performance, in this paper, a brief review on pulp and froth rheology in flotation is provided, with an objective of developing a basic understanding of rheology in flotation. The essential variables that affect the rheology of a flotation pulp and froth are discussed. The methods for measuring pulp and froth rheology are presented. The correlations of pulp and froth rheological properties to flotation performance are reviewed. Strategies that are currently used to mitigate the deleterious effects of problematic ores in flotation are also provided for flotation optimization. Research gaps are also proposed to highlight the need of further exploration of flotation rheology in future.
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7

Barbian, N., E. Ventura-Medina e J. J. Cilliers. "Dynamic froth stability in froth flotation". Minerals Engineering 16, n. 11 (novembre 2003): 1111–16. http://dx.doi.org/10.1016/j.mineng.2003.06.010.

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8

Matis, K. A., e P. Mavros. "Foam/Froth Flotation". Separation and Purification Methods 20, n. 2 (gennaio 1991): 163–98. http://dx.doi.org/10.1080/03602549108021414.

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9

Jera, Tawona M., e Clayton Bhondayi. "A Review of Flotation Physical Froth Flow Modifiers". Minerals 11, n. 8 (10 agosto 2021): 864. http://dx.doi.org/10.3390/min11080864.

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Abstract (sommario):
Over the past few decades, the need to process more minerals while lowering capital costs has led to an increase in the size of flotation cells, e.g., 0.03 m3 to 1000 m3. However, this increase has created new challenges in the operation and design of industrial flotation cells, particularly in terms of froth removal, because the distance the froth must travel increases with an increase in the flotation cell diameter. This has a negative impact on recovery. Physical froth flow modifiers can be used to improve froth removal. Their major functions are to modify and optimise the flow of the froth, improve froth drainage, reduce dead zones, and improve froth flow and removal dynamics. Therefore, physical froth flow modifiers are discussed, evaluated, and compared in this paper. The literature indicates that physical froth flow modifiers such as crowders and launders are used extensively as industrial solutions to enhance froth transport and recovery in large flotation cells. Other modifiers (including froth baffles and froth scrapers) have been found to have a profound effect on local froth phase sub-processes, including drainage and bubble coalescence. However, industrial uptake is either dwindling or limited to small-volume rectangular/U-shaped cells in the case of scrapers, or, there is no uptake at all in the case of froth baffles. Further research on how some of the physical modifiers (e.g., baffles and launders) impact the selectivity of particles is required.
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10

Ostadrahimi, Mahdi, e Saeed Farrokhpay. "Effect of detergents on froth stability and flotation separation". Tenside Surfactants Detergents 59, n. 2 (28 febbraio 2022): 176–81. http://dx.doi.org/10.1515/tsd-2021-2392.

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Abstract (sommario):
Abstract Froth stability is an important factor in determining flotation yield, and one of the factors affecting froth stability is dependent on the concentration and type of surfactant. Since detergents contain different types of surfactants, it is possible that they affect the froth stability (together with the frothing agent and the collector) and consequently the flotation yield. Therefore, the effect of detergents containing lauryldimethylamine oxide and sodium laureth sulphate was investigated in this study. The results showed that the addition of detergents increased the froth stability by more than 30% and 45% in terms of froth formation and froth decay, respectively. The flotation tests also showed that the addition of detergents increased the sulphur content of the concentrate by about 0.7%.
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Tesi sul tema "Froth flotation"

1

Hanumanth, G. S. "Froth flotation of china clay". Thesis, Swansea University, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.637217.

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An experimental and theoretical study of froth flotation separation of kaolinite from other associated minerals of china clay is presented herein. A new laboratory flotation equipment has been designed and built for the above study. Its novel features are discussed. Effects of physico-chemical variables such as pH, initial solid concentration of feed, froth height and air flowrate are studied by systematically carrying out series of semi-batch kinetic experiments. pH is shown to influence both recovery and grade of the product. The effects of pH are interpreted in terms of particle/particle interactions leading to flocculation which is demonstrated to be an essential prerequisite for flotation of small particles approaching colloidal size range with the typically 1-2mm bubbles produced in the cell. Regions in a flotation cell where hydrodynamic conditions permit flocculation are identified by an analysis of pulp flow based on a distributed shear rate model. The effects of initial solid concentration on recovery and grade are interpreted in terms of floc/bubble collision frequency. Influence of floc breakup and solid drainage on pulp phase and recovery kinetics, and product grade is discussed. Pulp phase kinetics are analysed on the basis of rate-distributed species model. The selective nature of froth drainage is demonstrated by a series of kinetic experiments using different froth heights. Air flowrate can influence both pulp phase kinetics and froth drainage. These effects are studied independently by conducting two sets of experiments - one with a negligible depth of froth and the other with a deep froth. An analysis of flow and rupture forces in the froth leads to identification of two distinct zones where different floc breakup and drainage mechanisms exist. On this basis a three-phase model, consisting of a mixed pulp phase and two mixed froth phases, is developed and used to predict froth effects on flotation kinetics and selectivity.
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2

Kaya, Muammer. "Froth washing in mechanical flotation cells". Thesis, McGill University, 1989. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=74232.

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Abstract (sommario):
This basic research project was aimed at assessing the potential of wash water for mechanical flotation machines. Test work at laboratory scale first examined the nature of entrainment; froth structures with and without wash water; and the location, geometry, and flowrate of wash water addition. The relationship between slurry, total water recovery and gangue recovery was characterized. Confirmatory work at pilot plant was completed.
The effect of wash water on metallurgical performance was tested with various streams from the Falconbridge Strathcona mill at laboratory and pilot and full plant scale, and with the secondary cleaner stage at the Eastmaque Kirkland Lake mill.
Results show that mechanical entrainment is the major means of gangue transport up to the slurry-froth interface. Transport into the froth is mostly hydraulic, although entrapment becomes dominant at low water recoveries. Free gangue recovery was closely related to slurry water recovery at all three scales. Wash water at an optimum superficial rate of 0.03 to 0.07 cm/s reduced entrainment by anywhere from 30 to 70%, typical values being around 50%.
Wash water can be further assisted by mechanical and ultrasonic vibration of the froth, difficult to achieve at plant scale, or with warm wash water, which becomes attractive if a waste heat source is available. A further rejection of 10 to 20% then becomes possible.
Distributor geometry was aimed at washing the entire froth surface at laboratory and pilot scale. It was observed that the recovery of hydrophobic minerals generally increased because the froth was stabilized. At plant scale, two perforated pipes close to the concentrate weir yielded the most reject. Froth stabilization was lost, and recoveries decreased.
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3

Kelley, Kyle. "Model-based Computer Simulation of Froth Flotation". Thesis, Virginia Tech, 2011. http://hdl.handle.net/10919/76850.

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Abstract (sommario):
Froth flotation is a separation process by which particles are selectively attached to air bubbles. It is one of the most dynamically complex industrial processes in use today. This complexity has steered research towards understanding the fundamental principles of the process. Relatively few researchers have successfully attempted to create a flotation simulator based on first principles. This thesis presents the development and testing of a simulator called SimuFloat, which is based on the flotation model developed at Virginia Tech. Flotation of chalcopyrite, coal, and phosphate are simulated. These simulations show the effects of changing the input parameters of the flotation circuit. The accuracy of SimuFloat is validated by comparing the predictions with the experimentally obtained flotation results.
Master of Science
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4

Henwood, Daryl. "The effect of conditioning on froth flotation". Master's thesis, University of Cape Town, 1995. http://hdl.handle.net/11427/21416.

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Bibliography: pages 154-159.
The method and extent to which mineral slurries are conditioned have been shown to greatly affect flotation grades and recovery. Most of this work is very mineral specific and centres around one or two operating variables. One of the major obstacles to understanding the effects of such pretreatment more fully, and to developing a global understanding of conditioning, is the system specific nature of the procedures applied to each mineral, and the apparently conflicting results across a range of mineral types. This thesis sets out to define conditioning both broadly enough to encompass almost all aspects of conditioning, as well as specifically enough to be useful in the study of single mineral-collector systems. Having done this, a measure of the efficiency or effectiveness of conditioning is devised and used to evaluate the relative effects of variables of conditioning, as well as to gain some insight into the mechanisms affecting the results. The work is completed by relating these observations to expected results in industrial applications and their implications on plant procedures. Most forms of conditioning for flotation were found to fit into two basic categories, which if they both take place in the same process, follow one another sequentially. In this thesis, these were termed "primary" and "secondary" conditioning, and were defined as follows: Primary Conditioning relates to the physical preparation of the surface of the particles, including comminution, oxidation, acid leaching and bacterial pretreatment. Secondary Conditioning is the process whereby prepared particles are rendered hydrophobic or hydrophilic through mixing, control of the environment and contacting with reagents.
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5

Zhang, Jian-Gou. "Factors affecting the kinetics of froth flotation". Thesis, University of Leeds, 1989. http://etheses.whiterose.ac.uk/3305/.

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In this research work, three types of flotation models (discrete, mean rate and the gamma function models) are modified based on the relationship between mass recovery and recovery. The modified models can be used to calculate both the recovery and grade of concentrate. Experimental work was carried out by using three different samples, which are chalcopyrite, coal and complex sulphide. In the chalcopyrite and coal flotation, air flow rate (AFR) was varied and different size fractions were considered in coal flotation. In complex sulphide flotation, the impeller speed (IPS) and air flow rate were varied, different size fractions were also considered individually. From the experimental results, the effect of air flow rate, impeller speed and particle size on the recovery and grade of concentrate are obtained, it is shown that an increase in air flow rate does not significantly increase recovery but reduce the grade of concentrate. High impeller speed can increase the recovery of fine and medium size, but it has very little effect on the coarse size. The effect of particle is that the medium size has the highest recovery in Fe minerals but the fine has the highest recovery in Zn and Cu minerals. The air flow rate, impeller speed and particle size affect on the kinetics of flotation is discussed from the model results. Where the modified models are used, the results show that an increase in air flow rate will increase the flotation rate of all size fraction, but an increase in impeller speed can only increase the flotation rate of the fine and medium size. The medium size has the highest flotation rate in most of the case.
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6

Riaz, Muhammad. "An electrochemical investigation of synergism in froth flotation". Thesis, Brunel University, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.257547.

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7

Shumba, Tanaka Casandra. "Relationship between flotation operational factors and froth behaviour". Master's thesis, University of Cape Town, 2014. http://hdl.handle.net/11427/9127.

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Includes bibliographical references.
This study utilised laboratory-scale column flotation experiments to investigate froth stability, with respect to, water recovery and top-of-froth bubble burst rate. Tests were conducted at different froth heights, superficial air rates and depressant dosages in a 2 m high Plexiglass column, using a PGM bearing UG2 ore from the Bushveld Igneous Complex. Four concentrate and tailings samples were simultaneously collected and solids and water recoveries were determined. Assays of the concentrates were conducted to establish the amount of platinum, palladium and chromite that was recovered under each operating condition. Video footage of the top of the froth was recorded and was used to measure the top-of-froth bubble burst rate. The stability of the froth was analysed qualitatively by comparing the relationship between water recovery and the bubble burst rate at the different operating conditions. A key finding from this study was that the concentration of particles had a large effect on the stability of the froth. The maximum concentration of particles was obtained when the tests were conducted in the absence of depressant. Under these conditions it was established that the froth produced was so stable that increasing the air rate only showed minor changes in the stability of the froth phase. This stability has been attributed to the presence of hydrophobic gangue, which stabilised the froth phase by embedding between adjacent bubbles and preventing bubble coalescence. Conversely, when a high depressant dosage was used the froth became unstable such that no trends could be established when either air rate or froth height were altered. The instability of the froth has been attributed to the depression of the majority of the froth stabilising gangue, which resulted in increased bubble coalescence.
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8

Kaushik, Sarthak. "Surface properties of crandallite in relation to froth flotation". Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/42550.

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The surface properties of crandallite relevant to the anionic flotation of salt-type minerals were investigated through electrokinetic, turbidity, and wettability techniques. All the tests were performed on fine crandallite particles as a function of pH and reagent concentration. The selected reagents included starch and oleic acid. From the zeta potential measurements, the iso-electric point of crandallite was found to be at pH 5.5 and the mineral surface can be expected to be negatively charged under typical flotation conditions (pH 9-11). The value of the iso-electric point correlated well with the stability of crandallite particles towards aggregation. Suspensions of fine crandallite showed minimum turbidity at pH 5.5 suggesting that the aggregation of the mineral was most pronounced at the iso-electric point. Calcium ions behaved as potential determining ions by increasing the iso-electric point to pH 6.5. In addition, calcium ions also acted as specifically adsorbing ions at higher pH. In the presence of starch, crandallite particles were strongly flocculated producing supernatants with the clarity of tap water. At the same time, the effect of starch on the zeta potential of crandallite was rather weak, consistent with the non-ionic character of the polysaccharide. The stability of crandallite towards aggregation was not strongly affected by oleic acid suggesting that the surfactant did not interact with the mineral. Wettability measurements on crandallite particles showed that oleic acid did not render the mineral particles hydrophobic at pH 10.5 (under normal flotation conditions) or at pH 7, which was in strong contrast to the wettability response of apatite. Under these conditions, crandallite surface was negatively charged and the adsorption of the anionic surfactant seemed to involve physical electrostatic forces as opposed to chemical interactions known to occur between apatite and oleic acid. Overall, the experimental results strongly suggest that crandallite remains hydrophilic during apatite flotation at pH 10.5 and the main mechanism of contamination of apatite concentrates by crandallite is through mechanical entrainment in the froth rather than by true flotation. In this respect, the role of starch as a flocculant should be beneficial in reducing the amount of fine crandallite reporting to the apatite concentrate.
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9

Noble, Christopher Aaron. "Laboratory-Scale Analysis of Energy-Efficient Froth Flotation Rotor Design". Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/76881.

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Abstract (sommario):
Froth Flotation is an industrial separation process commonly used in the primary enrichment of run-of-mine mineral material. Over the past 100 years, much of the process's development has come from empirical evolution, rather than fundamental understanding. While many of the governing sub-processes are still poorly understood, the primary influential factors lie within the chemical, equipment, and operational variables unique to each flotation system. This investigation focuses on the phenomenological investigation of the equipment variables, particularly the rotor design, at the laboratory scale. During this study, several small-scale flotation systems were developed, including various rotor and stator designs, tank sizes, and flow conditions. Experimental techniques were also developed to identify operational performance in four criteria: power consumption, gas dispersion, operational robustness, and flotation kinetics. Evaluation of the various rotors was conducted in two campaigns: (1) an exploratory campaign which featured 14 rotors in limited operational conditions (2) a detailed campaign which featured three rotors in an exhaustive set of conditions. The results show that different rotors exhibited varying degrees of performance when judged by the aforementioned performance criteria. In general, excessive fluid pumping leads to an increase range of stable operation at the expense of greater power consumption. However, this increased power consumption does not necessarily correspond to increased flotation performance, as the data generally confirms the linearly proportional relationship of flotation rate and bubble surface area flux. Consequently, enhanced flotation kinetics can be achieved by rotors which disperse high rates of gas while retaining a small bubble size.
Master of Science
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10

Ramberg, J. (Juhani). "Effect of the reagents and minerals on froth electrical conductivity in pilot scale froth flotation process". Master's thesis, University of Oulu, 2016. http://urn.fi/URN:NBN:fi:oulu-201601131001.

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This thesis studies how the changes to the flotation process caused by adjusting pH and the dosage of the flotation reagents affect the electrical conductivity of the froth flotation froth in different parts of the froth. The measurements in the experimental part were done in Oulu Mining School’s continuous minipilot beneficiation plant at the University of Oulu in March and May of 2015. The conductivity of the froth was measured with Outotec’s ERT (Electrical Resistance Tomography) based test probe. The probe was placed inside the 4-litre flotation cell that acted as a rougher in copper refining circuit. Froth’s bubble size, colour, stability and speed were measured with Outotec’s FrothSenseTM -camera. Elemental composition of the process streams was measured with a method based on x-ray fluorescence. The effect of three chemical reagents used in froth flotation, and also the effect of pH, was studied: dosage of Dowfroth (Test 1), xanthate (Test 2), zinc sulphate (Test 3) and pH (Test 4). Each test consists of three step tests, where the value of variable in question was changed while other values were kept at their base levels. Each test was performed twice. Assumption was that the adjusting of mentioned variables affects the other process variables, such as bubble size, froth thickness, elemental compositions etc., which in turn affects the electrical conductivity of the froth. Froth was divided vertically into layers so that the possible differences in different parts of the froth could be observed. Theoretical part of this thesis presents an overview of beneficiation process chain, starting from grinding and ending in dewatering processes. The chemical reagents used in flotation and some basic methods for measuring different parameters are also introduced. The results from the experimental part showed that the changing dosage of chemical regents and pH causes changes in process which also affected the electrical conductivity of the froth. Especially bubble size and froth thickness had clearly an effect on the conductivity. Furthermore, the conductivity values and changes to them were different in different layers of the froth, when the froth was thick. In a thin froth, the differences in the conductivity values and changes in them between the froth layers were much smaller
Tässä diplomityössä tutkittiin miten pH:n ja vaahdotusrikastuksessa käytettävien kemikaalien annostuksien säätämisen prosessiin aiheuttamat muutokset vaikuttavat vaahtopatjan eri osien sähkönjohtavuuteen vaahdotusrikastus prosessissa. Kokeellisessa osiossa mittaukset tehtiin Oulu Mining School:in jatkuvatoimisella minipilot -rikastamolla Oulun Yliopistolla maalis- ja toukokuussa 2015. Vaahdon sähkönjohtavuutta mitattiin Outotecin ERT:n (Electrical Resistance Tomography) perustuvalla testisauvalla. Sauva oli asennettu tilavuudeltaan nelilitraiseen vaahdotuskennoon, joka toimi kuparin rikastuspiirissä esivaahdotuskennona. Vaahdon kuplakokoa, väriä, stabiilisuutta ja nopeutta mitattiin Outotecin FrothSenseTM -kameralla. Prosessivirtojen kemialliset koostumukset mitattiin röntgenfluoresenssiin perustuvalla menetelmällä. Työssä selvitettiin kolmen eri vaahdotuksessa käytettävän kemikaalin ja pH:n vaikutusta vaahtopatjan sähkönjohtavuuteen: Dowfrothin (Testi 1), ksantaatin (Testi 2) ja sinkkisulfaatin (Testi 3) annostuksien sekä pH:n (Testi 4) vaikutus. Jokainen testi koostui kolmesta askelkokeesta, jossa mainitun muuttujan arvoa muutettiin muiden muuttujien arvojen pysyessä vakioina. Jokainen testi toistettiin kahdesti. Ennakko-oletus oli, että muutokset pH:hon ja reagenssien annostuksiin aiheuttavat muutoksia prosessinparametreihin kuten kuplakokoon, vaahdon paksuuteen, kemiallisiin koostumuksiin jne., jotka puolestaan vaikuttavat vaahdon sähkönjohtavuuteen. Vaahto jaettiin korkeussuunnassa kerroksiin, jotta mahdollisia eroja sähkönjohtavuuksien arvoissa ja niiden muutoksissa eri vaahdon osien välillä pystyttiin tarkastelemaan. Työn teoriaosuudessa esitellään mineraalien rikastuksen prosessiketju, alkaen jauhatuksesta ja päättyen vedenpoistoprosesseihin. Työssä käydään läpi myös vaahdotusrikastuksessa käytettäviä kemikaaleja sekä eri parametrien mittauksessa käytettäviä mittausmenetelmiä. Kokeellisesta osiosta saadut tulokset osoittavat, että pH:lla sekä vaahdotuksessa käytettävien kemikaalien annostuksien muutoksilla on vaikutusta vaahtopatjan sähkönjohtavuuteen. Erityisesti kuplakoolla ja vaahdon paksuudella oli selkeästi vaikutusta vaahdon sähkönjohtavuuteen. Lisäksi huomattiin, että paksussa vaahdossa sähkönjohtavuuden arvot ja niiden muutokset olivat erilaisia vaahdon eri kerroksissa. Ohuessa vaahdossa erot sähkönjohtavuuksien arvoissa ja muutoksissa vaahtokerrosten välillä olivat huomattavasti pienempiä
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Libri sul tema "Froth flotation"

1

Fan, Xianfeng. Froth flotation of ilmenite ores. Birmingham: University of Birmingham, 1999.

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2

Rao, S. Ramachandra. Surface Chemistry of Froth Flotation. Boston, MA: Springer US, 2004. http://dx.doi.org/10.1007/978-1-4419-9124-9.

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3

Rao, S. Ramachandra. Surface Chemistry of Froth Flotation. Boston, MA: Springer US, 2004. http://dx.doi.org/10.1007/978-1-4757-4302-9.

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4

Latin-American Congress on Froth Flotation (2nd 1985 Concepción, Chile). Froth flotation: Proceedings of the 2nd Latin-American Congress on Froth Flotation, Concepción, Chile, 19-23 August 1985. Amsterdam: Elsevier, 1988.

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5

Karr, C. L. Froth flotation collision efficiencies in strong force fields. [Washington, D.C.]: U.S. Dept. of the Interior, Bureau of Mines, 1990.

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6

Karr, C. L. Froth flotation collision efficiencies in strong force fields. Washington, DC: Dept. of the Interior, 1990.

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7

Riaz, Muhammad. An electrochemical investigation of synergism in froth flotation. Uxbridge: Brunel University, 1990.

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8

Ding, Jian. A study on feed slurry aeration in froth flotation. Ottawa: National Library of Canada, 1993.

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9

Khan, L. A. Froth flotation of coal fines from Illinois coal mine effluent. S.l: s.n, 1990.

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10

International, Colloquium Developments in Froth Flotation 1989 Gordon's Bay South Africa). Developments of froth flotation: International colloquium, 3-4 August 1989, Gordon's Bay, Cape Town. Cape Town: The Branch, 1989.

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Capitoli di libri sul tema "Froth flotation"

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Rao, S. Ramachandra. "Flotation Kinetics and Fine Particle Flotation". In Surface Chemistry of Froth Flotation, 675–702. Boston, MA: Springer US, 2004. http://dx.doi.org/10.1007/978-1-4757-4302-9_14.

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Rao, S. Ramachandra. "Flotation Kinetics and Fine Particle Flotation". In Surface Chemistry of Froth Flotation, 675–702. Boston, MA: Springer US, 2004. http://dx.doi.org/10.1007/978-1-4419-9124-9_14.

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Rao, S. Ramachandra. "Flotation Surfactants". In Surface Chemistry of Froth Flotation, 385–478. Boston, MA: Springer US, 2004. http://dx.doi.org/10.1007/978-1-4757-4302-9_9.

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Rao, S. Ramachandra. "Flotation Surfactants". In Surface Chemistry of Froth Flotation, 385–478. Boston, MA: Springer US, 2004. http://dx.doi.org/10.1007/978-1-4419-9124-9_9.

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Rao, S. Ramachandra. "Erratum to: Flotation Kinetics and Fine Particle Flotation". In Surface Chemistry of Froth Flotation, 757. Boston, MA: Springer US, 2004. http://dx.doi.org/10.1007/978-1-4757-4302-9_15.

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Rao, S. Ramachandra. "Erratum to: Flotation Kinetics and Fine Particle Flotation". In Surface Chemistry of Froth Flotation, 757. Boston, MA: Springer US, 2004. http://dx.doi.org/10.1007/978-1-4419-9124-9_15.

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Stoev, St, L. Kuzev, M. Metodiev e Sht Djendova. "Vibroacoustic Improvements of Froth Flotation". In Innovations in Flotation Technology, 383–407. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2658-8_19.

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Rao, S. Ramachandra. "Surface Forces in Flotation". In Surface Chemistry of Froth Flotation, 257–92. Boston, MA: Springer US, 2004. http://dx.doi.org/10.1007/978-1-4419-9124-9_6.

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Stevenson, Paul, e Noel W. A. Lambert. "Froth Phase Phenomena in Flotation". In Foam Engineering, 227–49. Chichester, UK: John Wiley & Sons, Ltd, 2012. http://dx.doi.org/10.1002/9781119954620.ch11.

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Rao, S. Ramachandra. "Introduction". In Surface Chemistry of Froth Flotation, 1–53. Boston, MA: Springer US, 2004. http://dx.doi.org/10.1007/978-1-4757-4302-9_1.

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Atti di convegni sul tema "Froth flotation"

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Lecrivain, Gregory, Giacomo Petrucci, Uwe Hampel e Ryoichi Yamamoto. "Gravitational Settling of Glass Fibers on an Air Bubble". In ASME/JSME/KSME 2015 Joint Fluids Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/ajkfluids2015-16458.

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Abstract (sommario):
Froth flotation is a separation process in which air bubbles are introduced in a water tank to separate the valuable commodities from the valueless material. Based on their relative affinity to water the valuable particles attach to the bubble surface and are carried to the top of the flotation tank to form the froth layer. The resulting froth layer is eventually collected to produce the concentrate. Froth flotation has been used for more than a century in mining operations to separate valuable materials such as rare earth metals from excavated ores. More recently, froth flotation has been employed for the treatment of contaminated water. In the present study, the effect of the particle elongation on the attachment mechanism is investigated in great detail. Using an in-house optical micro-bubble sensor the attachment of micron glass fibres on the surface of a stationary air bubble immersed in stagnant water is investigated. The attachment mechanism is here defined as three successive events: the approach of the particle near the bubble upstream pole, the collision of the solid particle with the gas-liquid interface and the particle sliding on the gas bubble surface. The translational particle velocities together with the particle orientation during entire attachment process are measured and compared with a theoretical model. For the first time the existence of two types of attachment is shown. Upon collision near the upstream pole of the gas bubble the major axis of the fibre aligns with the local bubble surface. If collision occurs at least 30° further downstream the contact is likely to take a punctual form, i.e. the head of the fibre is in contact with the gas-liquid interface.
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Lin, Xiaozhu, Guoqing Zhao e Yingying Gu. "A Classification of Flotation Froth Based on Geometry". In 2007 International Conference on Mechatronics and Automation. IEEE, 2007. http://dx.doi.org/10.1109/icma.2007.4303987.

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Repkova, Monika. "APPLICATION OF THE FROTH FLOTATION FOR FELDSPAR ORES TREATMENT". In SGEM2011 11th International Multidisciplinary Scientific GeoConference and EXPO. Stef92 Technology, 2011. http://dx.doi.org/10.5593/sgem2011/s04.103.

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Amankwah, Anthony, e Chris Aldrich. "Motion estimation in flotation froth using the Kalman filter". In IGARSS 2015 - 2015 IEEE International Geoscience and Remote Sensing Symposium. IEEE, 2015. http://dx.doi.org/10.1109/igarss.2015.7326164.

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AGANTE, E., T. CARVALHO, F. DURAO, A. PINTO e T. MARIANO. "KINETIC STUDY OF FROTH FLOTATION FOR PET-PVC SEPARATION". In 2004 New and Renewable Energy Technologies for Sustainable Development. WORLD SCIENTIFIC, 2007. http://dx.doi.org/10.1142/9789812707437_0011.

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Kumar, Navin, Shravan Kumar e Shatrughan Soren. "Performance analysis of beneficiation of coal tailings by froth flotation". In CURRENT TRENDS IN RENEWABLE AND ALTERNATE ENERGY. Author(s), 2019. http://dx.doi.org/10.1063/1.5096500.

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Amankwah, Anthony, e Chris Aldrich. "Machine Vision-based Motion Estimation of Flotation Froth using Mutual Information". In Biomechanics / Robotics. Calgary,AB,Canada: ACTAPRESS, 2012. http://dx.doi.org/10.2316/p.2012.752-060.

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Nunez, Felipe, e Aldo Cipriano. "Hybrid modeling of froth flotation superficial appearance applying dynamic textures analysis". In 2008 Chinese Control Conference (CCC). IEEE, 2008. http://dx.doi.org/10.1109/chicc.2008.4605613.

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Amankwah, Anthony, e Chris Aldrich. "Machine Vision-based Motion Estimation of Flotation Froth using Mutual Information". In Biomechanics / Robotics. Calgary,AB,Canada: ACTAPRESS, 2011. http://dx.doi.org/10.2316/p.2011.752-060.

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P, Nagarjuna, e T. Ananthan. "Machine Learning Based Estimation of Silicon Concentration in Froth Flotation Process". In 2022 IEEE 3rd Global Conference for Advancement in Technology (GCAT). IEEE, 2022. http://dx.doi.org/10.1109/gcat55367.2022.9971831.

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Rapporti di organizzazioni sul tema "Froth flotation"

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Skone, Timothy J. Froth Flotation. Office of Scientific and Technical Information (OSTI), marzo 2014. http://dx.doi.org/10.2172/1509061.

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Shirey, G. A., e R. D. Stoessner. Air-Sparged Hydrocyclone/Advanced Froth Flotation fine coal cleaning. Office of Scientific and Technical Information (OSTI), dicembre 1988. http://dx.doi.org/10.2172/5727527.

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Ferris, D. D., J. R. Bencho e E. R. Torak. Engineering development of advanced froth flotation. Volume 2, Final report. Office of Scientific and Technical Information (OSTI), marzo 1995. http://dx.doi.org/10.2172/78560.

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Author, Not Given. Engineering development of advanced physical fine coal cleaning technologies: Froth flotation. Office of Scientific and Technical Information (OSTI), gennaio 1992. http://dx.doi.org/10.2172/6782789.

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Author, Not Given. (Advanced froth flotation techniques): Quarterly technical progress report No. 1, September 1, 1988--November 30, 1988. Office of Scientific and Technical Information (OSTI), gennaio 1988. http://dx.doi.org/10.2172/6245259.

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Honaker, R. Q., e M. K. Mohanty. A modified release analysis procedure using advanced froth flotation mechanisms. Technical report, September 1--November 30, 1995. Office of Scientific and Technical Information (OSTI), dicembre 1995. http://dx.doi.org/10.2172/257326.

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Honaker, R. Q. ,. Mohanty, M. K. A modified release analysis procedure using advanced froth flotation mechanisms: Technical report, March 1, 1996-May 31, 1996. Office of Scientific and Technical Information (OSTI), aprile 1997. http://dx.doi.org/10.2172/469647.

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Honaker, R. Q., e M. K. Mohanty. A modified release analysis procedure using advanced froth flotation mechanisms. Final technical report, September 1, 1995--August 31, 1996. Office of Scientific and Technical Information (OSTI), maggio 1997. http://dx.doi.org/10.2172/475631.

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Harrison, K. E., D. D. Ferris, R. M. Kosky, J. J. Warchol, W. F. Musiol, S. Y. Shiao, G. H. Luttrell, G. T. Adel e R. H. Yoon. Controlled comparison of advanced froth flotation process technology and economic evaluations for maximizing BTU recovery and pyritic sulfur rejection. Office of Scientific and Technical Information (OSTI), gennaio 1990. http://dx.doi.org/10.2172/6778849.

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Author, Not Given. Engineering development of advanced physical fine coal cleaning technologies - froth flotation: Third quarterly report, April 1, 1989--June 30, 1989. Office of Scientific and Technical Information (OSTI), gennaio 1989. http://dx.doi.org/10.2172/6024370.

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