froth floatation in desulfurization

An investigation of the efficacy of biological additives ...

The biological molecule responsible for the suppression of pyritic sulfur in fine coal simulated froth flotation treated with bacteria was identified. Protein was found to be the most effective agent in pyrite suppression of the three cell components (protein, lipid, and carbohydrate) assayed.

Desulfurization of coal by an electrochemical-reduction ...

The optimum conditions for sulfur removal from coal by electrochemical reduction flotation in an aqueous NaCl solution were determined from orthogonal experiments. The effect of electrolytic conditions on the desulfurization ratio was also studied. The electrochemical-reduction processed coal was examined by X-ray diffraction, Fourier transform infrared spectroscopy and wet chemical analysis.

Suppression of pyritic sulphur during flotation tests ...

1987-7-1 · The sulphur content of a synthetic coal/pyrite mixture was reduced from 10.9 to 2.1% by flotation after bacterial preconditioning. It is postulated that pyrite removal in coals which are cleaned by froth flotation could be significantly reduced using a bacterial …

COMPARISON OF FROTH FLOTATION AND GRAVITY …

2015-2-1 · Combining reflux classification and froth flotation will give better results (coal recovery & desulfurization) compared to using two-stage froth flotation. This is because coal flotation is based on hydrophobicity of coal, while gravity separation takes advantage of the large difference in densities between coal and pyrite.

Environmental desulphurization of four Canadian mine ...

2000-8-1 · Environmental desulphurization is an attractive alternative for management of acid generating tailings. This process placed at the end of the primary process treatment circuit will reduce a large amount of the problematic tailings by concentrating the sulphide fraction. To produce desulphurized tailings, non-selective froth flotation is the ...

Combining Froth Flotation with Reflux Classification to ...

2016-9-10 · University of Cape Town. COMBINING FROTH FLOTATION WITH REFLUX CLASSIFICATION TO MITIGATE ARD GENERATING POTENTIAL OF THE WATERBERG AND WITBANK COAL ULTRAFINES VIA SULFIDE REMOVAL

7 Common Manganese Mining Processes

2019-11-13 · Comprehensive manganese concentrate products can be directly obtained by high intensity magnetic separation–froth flotation desulfurization. Using the sodium petroleum sulfonate instead of oxidized paraffin soap as the collector can make the pulp realize the separation under the neutral and normal temperature, which saves the consumption of ...

A Study of the Suppression of Pyritic Sulphur in Coal ...

2018-6-9 · (1987). A Study of the Suppression of Pyritic Sulphur in Coal Froth Flotation by Thiobacillus Ferrooxidans. Coal Preparation: Vol. 5, No. 1-2, pp. 1-13.

The Desulfurization of Magnetite Ore by Flotation with a ...

The contamination of sulfur emanating from pyrrhotite in magnetite concentrates has been a problem in iron ore processing. This study utilized froth flotation to float …

Flotation

2000-12-4 · Froth flotation is a surface chemistry‐based separations process extensively used in mineral processing, coal desulfurization, and water treatment. Flotation‐based separations transcend the field of mineral technology. The article describes the …

The Desulfurization of Magnetite Ore by Flotation with a ...

2019-8-15 · The desulfurization ratio of flotation process was calculated by the following equation: Ls F @®> 5 > 4 (2) where D is desulfurization ratio of flotation process, is yield of concentrate, 1 is the S grade of concentrate, and 0 is the S grade of raw ore. Figure 1. Flow sheet of flotation tests.

Desulfurization and demineralization of asphaltite using ...

2018-2-18 · flotation following aqueous sodium hydroxide on desulfurization and deashing was investigated. Froth flotation reduced the ash content of asphaltite by 35.8 % and 35.3 %, pyritic sulfur 22.55 % and 8.7 % (wt %) and its volatile matter content by 28.9 % and 28.9 %. The asphaltite flotation yield was 79.1 % and

Minerals | Free Full-Text | Desulfurization of the Old ...

Tailings from the abandoned Tiouit mine site in Morocco are mainly composed of sulfides, hematite, and quartz. They contain 0.06–1.50 wt % sulfur, mostly in the form of pyrite, pyrrhotite, and chalcopyrite. The tailings also contain gold (3.36–5.00 ppm), silver (24–37 ppm), and copper (0.06–0.08 wt %). Flotation tests were conducted to reprocess the tailings for Au, Ag, and Cu recovery ...

Nuorivaara, Ted; Björkqvist, Anna; Bacher, John; Serna ...

Flotation is an option that has recently called the attention to reduce the environmental impact of sulfide-bearing tailings [3,7-9,11]. Froth flotation is a well-known unit operation in the mineral processing field, and some studies have claimed that it can be used to separate species responsible for AMD from tailings to …

Froth flotation pretreatment for enhancing …

2008-4-28 · 9 Demirbas A, Demineralization and desulfurization of coals via column froth flotation and different methods, Energy Convers & Manage, 43 (2002) 885-895. 10 Uzun D & Ozdogan S, The behavior of sulphur forms of three lignites exposed to pyrolysis temperatures between 350 and 950 degrees C, Fuel, 83 (2004) 1063-1070.

Demineralization and desulfurization of coals via column ...

2002-5-1 · Flotation test conditions for the column froth flotation are given in Table 4. The conventional reverse flotation tests are conducted with the initial flotation conditions in Table 4 (Run-1). In order to obtain optimum values of the pH, particle size, amount of collector, frother and depressant, serial conventional flotation tests are conducted ...

(PDF) Desulfurization and Demineralization of Asphaltite ...

Froth flotation (FF) pretreatment of coal from Hazro, Turkey, for enhancing desulfurization with sodium hydroxide was investigated. FF reduced following contents of coal: ash, 58.54; pyritic ...

Coal Desulfurization by Solvent Leaching Methods

2011-4-29 · Coal Desulfurization by Solvent Leaching Methods Ali Ahmed, Naseer Ahmad, Rizwan Shah, M. Naeem Bhatti, Mahmood Saleem1 ABSTRACT Coal desulfurization prior to usage is a preprocessing in order to achieve clean fuel and reduce environmental impacts such as acid rain. Desulfurization of Lakhra (Pakistan) coal was

JME

2021-10-31 · leaching method for desulfurization of coal [10]. The increase in the potassium hydroxide concentration had a positive effect on the sulfur reduction. Increasing the methanol concentration (alone) as an organic solvent was not able to dissolve the inorganic sulfur and remove it. According to froth flotation and leaching, 66.41%

Coal desulfurization using bacteria adaptation and ...

Froth flotation is a conventional process which has been successfully used in a variety of mineral separation processes and depends upon the difference in the surface properties of the particles which constitute the slurry. In the froth flotation process, the material is ground to liberate particles of the materials to be separated.

COAL DESULFURIZATION:

2012-3-22 · Such a book has not been available since Robert Meyers wrote Coal Desulfurization in 1977, and considerable advances have been made in the more than 20 years since then. While several edited books on this topic have been published in the …

Coal Desulfurization: High-efficiency Preparation Methods ...

This book was written to provide a comprehensive survey of the current state-of-the-art information in coal preparation, with particular emphasis on coal desulfrization. The primary audience for this book will be practising coal preparation engineers who need complete information about all of the coal preparation and desulphurization technologies that are available now, or that may be ...

Kinetics of Coal Flotation

2018-8-10 · The first model is the classical first-order flotation kinetic model: K1 and K2 = first-order rate constants (min-¹). The third model is the first-order flotation kinetic model with a sine function (in the range of 0 to π/2) distribution of notabilities. The reason for …

Pyrite recovery mechanisms in coal flotation

1997-8-1 · In most operating coal-cleaning plants, a significant amount of pyrite is recovered in the froth during flotation of high-sulfur coal. This pyrite recovery is commonly believed to be a result of pyrite particles floating due to hydrophobicity. However, even though a wide range of pyrite depressants have been reported over the years, there is no ...

Evaluation of column flotation froth behavior by image ...

2018-7-31 · (2018). Evaluation of column flotation froth behavior by image analysis: effects of operational factors in desulfurization of iron ore concentrate. Energy Sources, Part A: Recovery, Utilization, and Environmental Effects: Vol. 40, No. 19, pp. 2286-2306.

flotation desulfurization of iron ore

2013-3-19 · flotation desulfurization of iron ore – Grinding Mill China. iron ore mining processing and iron ore crusher | My Wedding Blog The obtained iron ore materials are moved to flotation desulfurization procedure, then to weak … »More detailed

The Desulfurization of Magnetite Ore by Flotation with a ...

The contamination of sulfur emanating from pyrrhotite in magnetite concentrates has been a problem in iron ore processing. This study utilized froth flotation to float pyrrhotite away from magnetite using collectors of xanthate and dixanthogen. It was found that …

(PDF) Desulfurization and Parametric Study of Bituminous ...

desulfurization and de-ashing was investigated. At pH =1, very little separation efficiency almost 26% o f. sulfur removal, a nd 16 % of as h removal wer e recorded, then with the in crease of pH ...

Economic Extraction, Recovery, and Upgrading of Rare …

2018-12-3 · Froth Flotation Deslime Cyclones Coal Comparisons • Each of the coal samples is being leached using: • 30 wt% Coal waste • 10 g/L Ferric Sulfatein DI Water • 150 mL Ferric Sulfatesolution • pH 1.5 • pH adjusted hourly for the first 8 hours, then again at 25 hours for acid consumption. • 96 hours • Acquisition of active bacteria ...

Evaluation of physical parameters in environmental ...

2018-10-19 · Environmental desulfurization •Use of froth flotation to separate sulfide minerals: well-known mineral processing method to recover valuable minerals/metals •Challenge: recover minerals (sulfides) at the end of processing, mineral surfaces not receptive to flotation •Work to optimize environmental desulfurization by

An Efficiency Evaluation of Iron Concentrates Flotation ...

2013-9-19 · Keywords: Desulfurization, Froth flotation, Iron concentrate, Rhamnolipid biosurfactant 1. Introduction Synthetic chemicals from petroleum origins are now com-ing to a turning point with regards to their hazardous problems to living organisms. Concerns about environmental protection and the safety surrounding health have introduced an interest in

Flotation Desulfurization of Acidified High-Sulfur Bauxite ...

2021-2-24 · Abstract. The desulfurization of high-sulfur bauxite via flotation is more difficult than conventional sulphide, since the finely disseminated sulphide in the high-sulfur bauxite can lead to excessive particle entrainment, increase of froth, and low separation efficiency.

Coal desulfurization by bacterial treatment and column ...

1994-6-1 · @article{osti_10164021, title = {Coal desulfurization by bacterial treatment and column flotation. Final report}, author = {Kawatra, S K}, abstractNote = {A review of the literature showed that bacterial leaching, using the microorganism Thiobacillus ferrooxidans, was a very effective technique for removing pyrite from coal, as it could dissolve even the finest pyrite particles without the ...

Pyrite desulfurization by wet oxidation in alkaline ...

The improvement and technical development of several promising methods for desulfurizing and recovering fine coal was continued. These methods include froth flotation, selective oil agglomeration, pelletization, and a chemical desulfurization process which involves leaching fine coal with a hot dilute solution of sodium carbonate containing dissolved oxygen or air under pressure.