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Reflotation of Coal Flotation Tailings Using Foam

2017-11-29  the use of flotation. The low density of coal allows the flotation separation of much larger grains than it is in the treatment of ores. Individual petrographic components creating coal mass have different physicochemical properties and thus different flotability. The density of coal varies in a relatively wide range of 1.1 to 1.8 t.m-3. [1].

Coal Flotation an overview ScienceDirect Topics

Coal flotation is the most proficient technique used to improve the nature of fine particles by diminishing pollution substance (Majumder and Barnwal, 2011). The hypothesis of froth flotation is complex and has not been fully comprehended. This reality has been brought by many difficulties observed in coal preparation plants (Ye et al., 2017).

Coal flotation using a biosurfactant from Pseudomonas

The foam stability results showed that for aliphatic alcohols, the greater the number of hydrocarbon groups, the more stable the foam was under dynamic and static conditions. In coal flotation

Improving the performance of coal flotation using

2017-10-1  2.2.2. Experimental procedure. Each coal sample was mixed with local tap water, and the slurry was agitated vigorously to minimise particle aggregation prior to the flotation tests. 5 L coal slurry was fed to the column at a solid concentration of 5% solids by mass.. The flow rate and pressure of air supplied to the fluidic oscillator were 69 L/min and 1.5 bar, respectively.

Improvement of coal flotation by exposure of the froth to

In a flotation test, coal slurry (at 5 wt% of solid) was firstly conditioned with diesel (at 0, 200, 300 or 400 g⋅t −1) for 2 min in the feed tank.Next, MIBC (at 10, 15, 20 or 25 ppm) was added and air was supplied to the column (at surperficial gas rate of 1.2, 1.6, 1.9 or 2.2 cm⋅s −1).The slurry was then pumped into the column at 1.2 L⋅min −1 and sound at 350 Hz and 120 dB (the

Improvement of coal flotation by exposure of the froth to

2021-4-27  Collectorless flotation tests were carried out with process water for coal A. Flotation tests with diesel as collector at 50 ppm were carried out with simulated process water (0.03 M NaCl solution

Physical and chemical interactions in coal flotation

2003-9-29  Coal flotation is a complex process involving several phases (particles, oil droplets and air bubbles). These phases simultaneously interact with each other and with other species such as the molecules of a promoting reagent and dissolved ions in water. The physical and chemical interactions determine the outcome of the flotation process.

(PDF) Specific ion effect of chloride salts on

In addition, zeta potential and foam stability tests were performed. The results from this study showed that the flotation behaviour of coal was influenced by these dissolved salts, and determined

9 REFLOTATION OF COAL FLOTATION TAILINGS USING FOAM SEPARATION

CiteSeerX Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Froth separation is one of the new methods of flotation process in mineral treatment. This method allows a substantial increase in the size upper limit of separated grains. The contribution deals with the verification of the possibility of using the froth separation for retreatment of flotation tailings.

Coal flotation using a biosurfactant from Pseudomonas

2010-8-25  foam on the surface and drying. It had critical micelle concentration of 100 ppm. Froth characterization showed that the biosurfactant was superior to methyl isobutyl carbinol (MIBC) in terms of froth height and stability. The biosurfactant was examined in coal flotation as a frother.

Optimization of Coal Washery Tailings by Flotation Process

2019-10-17  Flotation tailings are by-products of coal preparation plants, which do not only occupy cultivated land but also cause pollution. The high ash content and low calorific value of tailings limit their applications. Deashing is the precondition for the reutilization of flotation tailings. However, it is more difficult to remove ash content from flotation tailings compared with raw coal.

Effect of alcohol and polyglycol ether frothers on foam

Effect of alcohol and polyglycol ether frothers on foam stability, bubble size and coal flotation. Download. Effect of alcohol and polyglycol ether frothers on foam stability, bubble size and coal flotation. Arun Mishra. Related Papers. Fundamental properties of flotation frothers and their effect on flotation.

Preparation and impact on coal flotation of octanol

2017-7-27  Flotation tests showed that the oil-saving rate of the emulsified kerosene could reach two thirds with same yield of clean coal. Meanwhile, the flotation speed of the emulsified kerosene was faster, the yield of clean coal increased by 7.38%, and the coal ash reduced by 0.98% with same dosage.

Improving reagent regime of coal sludge flotation (Journal

The U.S. Department of Energy's Office of Scientific and Technical Information

Study of a novel environmental friendly frother in coal

2019-12-27  A novel environmental friendly frother FA-803 was selected and compared with other three kinds of frother commonly used in coal preparation plants. It was observed that there was a relationship between the combustible material recovery with the same amount of collector and different amounts of frother and the water-carrying rate of flotation froth.

Kinetic Study of Air Bubbles-Cetyltrimethylammonium

2020-7-21  Foam flotation has been shown to be an attractive technique for recovering and concentrating algal biomass from a culture medium. Nevertheless, the development of mathematical models for the foam flotation process is complex, due to the interactions between gas, liquid, and solids phases in the process.

Determination of Critical Coalescence Concentration and

2013-7-26  The paper presents a correlation between the critical coalescence concentration and hydrophilic–lipophilic balance/molecular weight ratio for surfactants used as flotation frothers. The correlation is based on experimental data published in literature. The obtained empirical equation allows one to accurately predict the critical coalescence concentration based only on the chemical structure

柴油对浮选泡沫稳定性影响的试验研究 CHINACAJ

Foam stability is an important parameter affecting the flotation efficiency. To investigate the effect of diesel on foam stability,the foaming ability and foam stability of mixed solution of different diesel concentrations with 20 × 10-6 methyl isobutyl carbinol ( MIBC) solution were explored by foam scanning analyzer ( FOAMSCAN).

Optimization of Coal Washery Tailings by Flotation Process

2019-10-17  Flotation tailings are by-products of coal preparation plants, which do not only occupy cultivated land but also cause pollution. The high ash content and low calorific value of tailings limit their applications. Deashing is the precondition for the reutilization of flotation tailings. However, it is more difficult to remove ash content from flotation tailings compared with raw coal.

OHYHORISXOS IORWDWLRQ IOPscience

This paper presents the results of the evaluation of the coal flotation efficiency in the presence of an inorganic salt in the pulp. It was shown that change of salt contains (NaCl) in pulp affects to the stability and mineralization degree of floatation foam. These results

(PDF) Foam/Froth Flotation Kostas Matis Academia.edu

IOne of the early applications of column flotation was the clcaning of coal This has both economical and environmental bcnefits : since as much run-of-mine coal is recovered as possible, a reduction of air and water pollution is obtained.Laboratory-scale studies of columns include : studies of the column hydrodynamics 47.48, the use of calcite

FUNDAMENTAL PROPERTIES OF FLOTATION FROTHERS

2020-8-4  minutes of flotation (F4 coal-silica mixture, forward flotation). Figure 34, p.66: Flotation kinetics for F4 coal-silica mixture for all tested frothers at 7.7xl0"3 g/L (forward flotation). Figure 35, p.67: Particle size analysis for flotation products, forward flotation of F4

Effect of alcohol and polyglycol ether frothers on foam

Effect of alcohol and polyglycol ether frothers on foam stability, bubble size and coal flotation. Download. Effect of alcohol and polyglycol ether frothers on foam stability, bubble size and coal flotation. Arun Mishra. Related Papers. Fundamental properties of flotation frothers and their effect on flotation.

Improving reagent regime of coal sludge flotation (Journal

The U.S. Department of Energy's Office of Scientific and Technical Information

1 Froth Flotation Fundamental Principles

2009-8-27  1 Froth Flotation Fundamental Principles Froth flotation is a highly versatile method for physically separating particles based on differences in the ability of air bubbles to selectively adhere to specific mineral surfaces in a mineral/water slurry. The particles with attached air bubbles are then carried to the surface and

Study of a novel environmental friendly frother in coal

2019-12-27  A novel environmental friendly frother FA-803 was selected and compared with other three kinds of frother commonly used in coal preparation plants. It was observed that there was a relationship between the combustible material recovery with the same amount of collector and different amounts of frother and the water-carrying rate of flotation froth.

Kinetic Study of Air Bubbles-Cetyltrimethylammonium

2020-7-21  Foam flotation has been shown to be an attractive technique for recovering and concentrating algal biomass from a culture medium. Nevertheless, the development of mathematical models for the foam flotation process is complex, due to the interactions between gas, liquid, and solids phases in the process.

柴油对浮选泡沫稳定性影响的试验研究 CHINACAJ

Foam stability is an important parameter affecting the flotation efficiency. To investigate the effect of diesel on foam stability,the foaming ability and foam stability of mixed solution of different diesel concentrations with 20 × 10-6 methyl isobutyl carbinol ( MIBC) solution were explored by foam scanning analyzer ( FOAMSCAN).