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) Abstract: The high pressure acid leaching of zinc powder replacement residue containing gallium and germanium was carried out. The effects of sulfuric acid concentration, liquid to solid ratio, time... investigated. The results show that increasing sulfuric acid concentration till 156 g/L benefits the leaching of gallium and germanium. Above this point, the leaching rate of germanium will decrease......
Sulfuric acid leaching kinetics of South African chromiteQing Zhao1,2,Cheng-jun Liu1,Pei-yang Shi1,Bo Zhang1,Mao-fa Jiang1,Qing-song Zhang1,Ron Zevenhoven2,Henrik Saxén21. Key Laboratory...">The sulfuric acid leaching kinetics of South African chromite was investigated. The negative influence of a solid product layer constituted of a silicon-rich phase and chromium-rich sulfate......
increased with the increase of sulfuric acid concentration, because of dissolving of metals in high acid concentration [24]. The curves of leaching efficiency of Cd, Zn and Fe increased fast... leaching of ZNLR was investigated. The effects of hydrazine sulfate concentration, initial sulfuric acid concentration, temperature, duration and liquid-to-solid ratio on the extraction of Cd, Zn and Fe......
. Because Ni and Co exist in oxide forms (Fig.8), the interaction of acid with relatively high concentration to oxides of Ni and Co is fast, and the leaching rates of them reach the maximum in relatively... size and leaching time on dissolution rate of the main metals in the samples were investigated. The prepared leaching solution with the desired hydrochloric acid concentration was placed into a 1 L......
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Leaching of vanadium from stone coal with sulfuric acidWANG Mingyu, XIAO Liansheng, LI Qinggang, WANG Xuewen, and XIANG Xiaoyan School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China摘 要:The effects of roasting, mass ratio of H2SO4 to stone coal, leaching temperature, liquid-to-solid ratio, grinding fineness......
B, MADHUCHHANDA M, RATH P C, PARAMGURU R K. Simultaneous leaching of a deep-sea manganese nodule and chalcopyrite in hydrochloric acid [J]. Metall Mater Trans B, 2001, 32(5): 777-784. [12] GANTAYAT B P, RATH P C, PARAMGURU R K, RAO S B. Galvanic interaction between chalcopyrite and manganese dioxide in sulfuric acid medium [J]. Metall Mater Trans B, 2000, 31(1): 55-61. [13] QIU M Q, XIONG S Y......
concentrate[S]. [4] 林祚彦, 华一新. 高硅氧化锌矿硫酸浸出的工艺及机理研究[J]. 有色金属: 冶炼部分, 2003(5): 9-11. LIN Zuoyan, HUA Yixin. Technology and mechanism study on leaching high silicon zinc oxide ore with sulfuric acid[J]. Nonferrous..., 11(6): 1114-1117. [10] 覃文庆, 唐双华, 厉超. 高硅低品位氧化锌矿的酸浸动力学[J]. 矿冶工程, 2008, 28(1): 62-66. QIN Wenqing, TANG Shuanghua, LI Chao. Kinetics of sulfuric acid leaching of high silica low-grade zinc oxide ore[J......
of different extraction conditions in improving niobium extraction efficiency from the sulfate leach liquor. 3.2 Effect of sulfuric acid concentration Four leach liquors were prepared by digesting... to sulfuric acid leaching using acid concentrations varied from 17.6 to 4.5 mol/ L. The extraction of niobium from the sulfate leach liquors was done using the synthesized 8,9-dihydro[1,2,4]triazolo[1,5-a......
batteries can be transferred to the acid solution by sulfuric acid leaching agent. In this work, the separation and recovery of cobalt, nickel, manganese and lithium in sulfuric acid leaching solution..., manganese carbonate, basic nickel carbonate and lithium carbonate are 98.77%, 98.89%, 98.46% and 96.52%, respectively. Key words: ternary lithium battery; sulfuric acid leaching solution; cobalt nickel......