Separation and purification of elemental sulfur from sphalerite concentrate direct leaching residue by liquid paraffin

2019 ◽  
Vol 186 ◽  
pp. 162-169 ◽  
Author(s):  
Yangyang Fan ◽  
Yan Liu ◽  
Liping Niu ◽  
Tingle Jing ◽  
Ting-an Zhang
Keyword(s):  
Elemental Sulfur ◽  
Liquid Paraffin ◽  
Separation And Purification ◽  
Leaching Residue ◽  
Direct Leaching

Separation of elemental sulfur from zinc concentrate direct leaching residue by vacuum distillation

2014 ◽  
Vol 138 ◽  
pp. 41-46 ◽  
Author(s):  
Hailong Li ◽  
Xianying Wu ◽  
Mingxia Wang ◽  
Jun Wang ◽  
Shaokang Wu ◽  
...  
Keyword(s):  
Vacuum Distillation ◽  
Elemental Sulfur ◽  
Leaching Residue ◽  
Direct Leaching ◽  
Zinc Concentrate

scholarly journals Sº and jarosite behavior during recovery of values from the direct leaching residue of sphalerite using cyanide and glycine

2021 ◽  
pp. 31-31
Author(s):  
N.G. Picazo-Rodríguez ◽  
F.R. Carrillo-Pedroza ◽  
Martínez Luévanos ◽  
M.J. Soria-Aguilar ◽  
I. Almaguer-Guzmán
Keyword(s):  
Hydrothermal Treatment ◽  
Elemental Sulfur ◽  
Extraction Process ◽  
Gold Extraction ◽  
Valuable Metals ◽  
Negative Effect ◽  
Leaching Residue ◽  
Direct Leaching ◽  
Cyanide Consumption ◽  
Silver Extraction

This paper reports the effect of the components of a direct leaching residue (jarosite and elemental sulfur), on the recovery of valuable metals such as gold and silver. Leaching media such as cyanide and mixtures of cyanide with glycine were used to recover the gold and silver from the residue; however, a low recovery of these metals was obtained. The above due to the negative effect of its components which cause problems in the extraction process such as encapsulation of silver (due to jarosite) and the formation of thiocyanate and re-precipitation of silver (due to sulfur). Various treatments prior to leaching were tested, finding that when the residue is desulfurized with perchlorethylene and subjected to an oxidizing alkaline hydrothermal treatment, the gold extraction increased from 39.73 to 88% and the silver extraction of 64.76 to 94.29%. Additionally, it was determined that when cyanide is assisted by glycine, the latter decreases the cyanide consumption by inhibition of the dissolution of iron and sulfur in cyanide.

Preparation of monodispersed CuS nanocrystals in an oleic acid/paraffin system

RSC Advances ◽  
2015 ◽  
Vol 5 (103) ◽  
pp. 84465-84470 ◽  
Author(s):  
Xiaojiang Li ◽  
Yanan Li ◽  
Fei Xie ◽  
Wei Li ◽  
Wenjiang Li ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Elemental Sulfur ◽  
Cupric Oxide ◽  
Liquid Paraffin ◽  
System P ◽  
Hot Injection

Well-dispersed CuS nanocrystals were synthesized through a simple hot injection approach using cupric oxide and elemental sulfur as the precursors in an oleic acid/liquid paraffin system.

scholarly journals Leaching of lead from sphalerite concentrate direct leaching residue by hydrochloric acid and sodium chloride for preparation of lead oxides

2020 ◽  
Vol 56 (2) ◽  
pp. 247-255
Author(s):  
Y.-Y. Fan ◽  
Y. Liu ◽  
L.-P. Niu ◽  
T. Jing ◽  
T.-A. Zhang
Keyword(s):  
Sodium Chloride ◽  
Hydrochloric Acid ◽  
Chloride Concentration ◽  
Sodium Oxalate ◽  
Hydrochloric Acid Concentration ◽  
Solid Ratio ◽  
Oxide Powders ◽  
Optimum Parameters ◽  
Leaching Residue ◽  
Direct Leaching

The purpose of this study was to select and propose an applicable method for extracting lead from sphalerite concentrate direct leaching residue. A large number of experiments were conducted to extract lead from sphalerite concentrate direct leaching residue by hydrochloric acid and sodium chloride solution as leachates. The main optimum parameters were determined, such as a liquid-solid ratio of 17.5-1, a reaction temperature of 85?C, an initial hydrochloric acid concentration of 1.3 mol/L, an initial sodium chloride concentration of 300 g/L, and a reaction time of 60 min. Ninety-five percent of the zinc, 96.0% of the iron, and 93.7% of the lead were extracted into leachate at the optimum conditions. The lead in the leachate was in the form of [PbCl4]2-. After the leachate was purified to remove impurities, it was converted into lead oxalate by sodium oxalate as a precipitant. Finally, lead oxalate was decomposed to obtain lead oxide powders via a high-temperature calcination process.

scholarly journals Selective Flotation of Elemental Sulfur from Pressure Acid Leaching Residue of Zinc Sulfide

Minerals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 89
Author(s):  
Guiqing Liu ◽  
Kaixi Jiang ◽  
Bangsheng Zhang ◽  
Zhonglin Dong ◽  
Fan Zhang ◽  
...  
Keyword(s):  
Zinc Sulfide ◽  
Elemental Sulfur ◽  
Acid Leaching ◽  
Sulfur Pressure ◽  
Flotation Process ◽  
Return Water ◽  
Process Mineralogy ◽  
Leaching Residue ◽  
Pressure Acid Leaching ◽  
Mineralogy Analysis

An efficient flotation process was developed to selectively recover elemental sulfur from a high-sulfur pressure acid leaching residue of zinc sulfide concentrate. The process mineralogy analysis showed that the sulfur content reached 46.21%, and 81.97% of the sulfur existed as elemental sulfur which was the major mineral in the residue and primarily existed as pellet aggregate and biconical euhedral crystal. An elemental sulfur concentrate product with 99.9% of recovery and 83.46% of purity was obtained using the flotation process of one-time blank rougher, two-time agent-added roughers, and two-time cleaners with Z-200 as collector and Na2S + ZnSO4 + Na2SO3 as depressant. The flotation experiment using return water indicated that the cycle use of return water had no adverse effect on the flotation performance of elemental sulfur. The process mineralogy analysis manifested that main minerals in the residue directionally went into the flotation products. Most of elemental sulfur entered the concentrate while other minerals almost completely went into the tailing. Main valuable elements lead, zinc, and silver entered the tailing with sulfides and could be recovered by lead smelting. The proposed process can realize the comprehensive recovery of valuable components in the high-sulfur residue and thus it has wide industrial application prospect.

scholarly journals Studies of the Direct Leaching of Zinc Concentrates and the Recovery of Elemental Sulfur from the Leach Residue.

2001 ◽  
Vol 48 (1) ◽  
pp. 37-43 ◽  
Author(s):  
Atsushi SHIBAYAMA ◽  
Sakiko KAGAYA ◽  
Toshio MIYAZAKI ◽  
Eiichi KUZUNO ◽  
Toyohisa FUJITA ◽  
...  
Keyword(s):  
Elemental Sulfur ◽  
Leach Residue ◽  
Direct Leaching

Scanning Electron Microscope Study of Bacteria on Mineral Surfaces

1976 ◽  
Vol 34 ◽  
pp. 130-131
Author(s):  
V.K. Berry
Keyword(s):  
Oxidation Reaction ◽  
Electron Microscope Study ◽  
Elemental Sulfur ◽  
Thiobacillus Ferrooxidans ◽  
Physical Contact ◽  
Metal Sulfides ◽  
Low Grade ◽  
Mineral Surfaces ◽  
Mineral Surface ◽  
Scanning Electron Microscope Study

There are two strains of bacteria viz. Thiobacillus thiooxidansand Thiobacillus ferrooxidanswidely mentioned to play an important role in the leaching process of low-grade ores. Another strain used in this study is a thermophile and is designated Caldariella .These microorganisms are acidophilic chemosynthetic aerobic autotrophs and are capable of oxidizing many metal sulfides and elemental sulfur to sulfates and Fe2+ to Fe3+. The necessity of physical contact or attachment by bacteria to mineral surfaces during oxidation reaction has not been fairly established so far. Temple and Koehler reported that during oxidation of marcasite T. thiooxidanswere found concentrated on mineral surface. Schaeffer, et al. demonstrated that physical contact or attachment is essential for oxidation of sulfur.

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