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Leaching vanadium by high concentration sulfuric acid from stone coal CHEN Xiang-yang(陈向阳)1, 2, LAN Xin-zhe(兰新哲)1, 2, ZHANG Qiu-li(张秋利)1, MA Hong-zhou(马红周)1, ZHOU Jun(周 军)1 1. School... from stone coals by high concentration sulfuric acid was researched. The effect of the concentration of sulfuric acid, leaching temperature, leaching time and helper leaching agent on the extraction......
were the particle size of the sample, concentration of sulfuric acid in the leaching solution, pressure, temperature and time of reaction. 3.1 Effect of particle size The effect of particle size... silicate ore in the range of 106-300 μm, and a significant increase in the Fig.2 Effect of particle size on leaching of zinc silicate ore (Sulfuric acid concentration of 120 g/L, pressure of 1 000......
="ChDivSummary" name="ChDivSummary">Sulfuric acid leaching of high iron-bearing zinc calcine was investigated to assess the effects of sulfuric acid concentration, liquid-to-solid ratio, leaching time, leaching...Sulfuric acid leaching of high iron-bearing zinc calcineJin-lin Yang1,2,Ji-guang Liu1,Han-xin Xiao1,Shao-jian Ma1,21. College of Resources,Environment and Materials,Guangxi University2. Ministry......
, and the leaching kinetics of nickel was analyzed. The experimental results indicate that the effects of particle size and sulfuric acid concentration on the nickel extraction are remarkable; the effect of reaction..., the nickel extraction efficiency is improved. 93.5% of nickel in residue is extracted under suitable leaching conditions, including particle size (0.074-0.100) mm, sulfuric acid concentration 30% (mass......
of sulfuric acid, concentration of sulfuric acid, reaction temperature and reaction time) on the leaching rate of boric acid (LRBA) from low-grade ascharite and the precipitation conditions of kieserite... 3.1.5 Optimum reaction conditions for boric acid leaching When the amount of sulfuric acid is 85% of theoretical amount, concentration of sulfuric acid 20%, leaching time is 100 min and leaching......
reason that causes the high acid consumption for the direct acid leaching of black shale. On the other hand, the higher concentration of these impurity metals brings some difficulties... leaching experiments) was used. Sample (200 g) was mixed with a measured amount of distilled water and calculated amounts of sulfuric acid (AR). The slurry was added to the autoclave and then was heated......
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... of the leaching experiments were conducted with fixed parameters including sulfuric acid concentration of 0.68% (mass fraction, all sulfuric acid concentrations in this work are mass fraction), liquid......
with high contents of Pb, Zn, Ag, etc by oxygen pressure acid leaching was studied. It is unusual that tetrahedrite, whose treatment was rarely studied, is the primary copper mineral of the concentrates... location is also more flexible without the restrictions of sulfuric acid sales. The technologies and chemical principle utilizing Gacun complex copper concentrates by oxygen pressure acid leaching......
Leaching isomorphism rare earths from phosphorite ore by sulfuric acid and phosphoric acidHui-Xin Jin1,2,Fu-Zhong Wu1,2,Xiao-Hao Mao1,Mei-Long Wang1,Hong-Yan Xie11. College of Materials... in the world contain isomorphism rare earths(RE) which are considerably difficult to be leached into solution in the wet phosphoric acid process. In this work, a systematic study of leaching RE using sulfuric......
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