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less than 44 μm. Under the optimum conditions, the leaching rate of the zinc can reach 95% and the reduction rate of the sulfur can reach 90%. Key words: zinc sulfide concentrate; pressure acid... Pressure acid leaching of zinc sulfide concentrate GU Yan(古 岩), ZHANG Ting-an(张廷安), LIU Yan(刘 燕), MU Wang-zhong(牟望重), ZHANG Wei-guang(张伟光),DOU Zhi-he(豆志河), JIANG Xiao-li(蒋孝丽) Key......
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Pressure acid leaching of black shale for extraction of vanadium LI Min-ting(李旻廷), WEI Chang(魏 昶), FAN Gang(樊 刚), LI Cun-xiong(李存兄),DENG Zhi-gan(邓志敢), LI Xin-bin(李兴彬) Faculty of Metallurgical... ____________________________________________________________________________________________ Abstract: Extraction of vanadium from black shale was attempted in pressure acid leaching. The chemical components of the sample obtained from Guizhou Province of China......
in lixivium. The Gacun copper concentrates are treated by direct oxygen pressure acid leaching in the regime of moderate temperature, and most of sulfide sulfur in the concentrates is oxidized into sulfur... and Ag in Gacun complex Cu concentrate can be reclaimed synthetically by the oxygen pressure acid leaching process. This process is not only environmentally friendly because it does not release sulfur......
Pressure leaching of zinc silicate ore in sulfuric acid medium LI Cun-xiong(李存兄), XU Hong-sheng(徐红胜), DENG Zhi-gan(邓志敢), LI Xing-bin(李兴彬), LI Ming-tin(李旻廷), WEI Chang(魏 昶) Faculty... and the results showed that zinc exists mainly as hemimorphite and smithsonite in the sample. Sulfuric acid pressure leaching of zinc silicate ore was carried out to assess the effect of particle size, sulfuric......
Acid leaching of vanadium from roasted residue of stone coal ZHU Yang-ge(朱阳戈), ZHANG Guo-fan(张国范), FENG Qi-ming(冯其明), LU Yi-ping(卢毅屏), OU Le-ming(欧乐明), HUANG Si-jie(黄思捷) School of Resources... of stone coal that came from power generation was conducted. Factors which influence the leaching of vanadium such as concentration of sulfuric acid, leaching temperature, leaching time and liquid......
. Engineering Command Institute of Chemical Defence, Beijing 102205, China) Abstract: Coupling process of sphalerite concentrate leaching in H2SO4-HNO3 and tetrachloroethylene extracting of sulfur... in the ore is converted to elemental sulfur, which remains in the solid residue, rather than sulfur dioxide in the gaseous effluent to pollute the atmosphere. However, the sulfur formed during leaching......
Leaching behavior of metals from limonitic laterite ore by high pressure acid leaching GUO Xue-yi, SHI Wen-tang, LI Dong, TIAN Qing-hua School of Metallurgical Science and Engineering, Central... pressure acid leaching process for the extraction of nickel and cobalt. The effects of sulfuric acid added, leaching temperature, leaching time and liquid/solid (L/S) ratio on metals extraction were......
J. Cent. South Univ. (2020) 27: 27-36 DOI: https://doi.org/10.1007/s11771-020-4275-4 Kinetics of leaching lithium from lepidolite using mixture of hydrofluoric and sulfuric acid WANG Hai-dong(王海东)1... shows great potential in leaching lithium (Li) from lepidolite. Leaching kinetics of Li in a mixture of sulfuric acid and hydrofluoric acid, which is a typical lixivant for the fluorine-based chemical......
·2H2O, PbSO4 and ZnSO4·6H2O), silicate (SiO2), and oxide (Fe2O3). Dissolution of leaching filter cake was carried out using 5 parameters and each in 4 levels (acid concentration, temperature, time... efficiencies were 88.71% and 8%, respectively. Leaching tests with sulfuric acid (added di-ammonium oxalate monohydrate) and hydrochloric acid (HCl) on the residues obtained from previous-stage......
