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Microcalorimetric studies of interaction between extracellular polymeric substance and sulfide minerals ZHU Jian-yu(朱建裕)1, 2, YANG Peng(杨 鹏)1, LI Bang-mei(李邦梅)1, ZHANG Jing-xia(张静霞)1, HUANG Qiu... of EPS of leaching bacteria is of crucial importance. Microcalorimetric measurement was used to study the three simulative components of EPS. The attachment of L-cysteine increases with its increasing......
. An extraction of nickel (90.3%) and cobalt (88.6%) was successfully achieved within a 300 d leaching process from the Jinchuan low grade nickel sulfide mineral ore using a column reactor at ambient temperature. Key words: column reactor; mixed mesophiles; nickel sulfide mineral; magnesia adaptation; pre-leaching ......
, and the leaching rates of copper and zinc are as high as 97.10% and 89.83% while lead and silver are transformed into sulfate and sulfide respectively and stay in leaching residue. The copper... to minimize wetting of the chalcopyrite surface by molten sulfur, promoting the leaching kinetics. More than half of sulfide sulfur is transformed into sulfur and the sulfate content of the leaching residue......
sodium sulfate was screened out as leaching agent for copper ore leaching. In order to further improve its potential, leaching rate was chosen as response value. First of all, important factors... copper leaching together. Fig. 5 Response surface (a) and contours (b) of sulfuric acid concentration and surfactant concentration When the CMC of the surfactant (lauryl sodium sulfate) was 0.008 mol/L......
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]. Harbin: Harbin Industrial University Press, 2012: 303-305. Activation of sodium metabisulfite on surfaces of copper-zinc sulfide ore in cyanidation tailings YANG Xiu-li, HUANG Xiong, QIU Ting-sheng... destroy cyanide and then attack the sulphides. Key words: sodium metabisulfite; copper zinc sulfide ore; cyanide; activation mechanism; kinetics Foundation item: Project(51474114) supported......
in Jinchuan company were studied by the method of sodium sulfide leaching and SO2 neutralization. The effect of temperature, concentration of Na2S, molar ratio of Na2S to S0 and leaching time... SO2 into solution. The quality of element sulphur may reach 99.08% and the recycle ratio of sulphur is 54.6%-74.19%. Key words: copper residue; sodium sulfide; leaching; precious metals......
of sulfide minerals, and to study the passivation components that hinder the bioleaching. 2 Leaching bacteria In order to enhance the bioleaching process, the selection of high activity microorganism... diversity and metabolic function of leaching bacteria. Meanwhile, the mechanism of mineral-microbe interaction still has not been revealed. 3 Sulfide mineral bioleaching By understanding the bioleaching......
Optimization of brine leaching of metals from hydrometallurgical residue GUO Zhao-hui(郭朝晖), PAN Feng-kai(潘凤开), XIAO Xi-yuan(肖细元), ZHANG Long(张 珑), JIANG Kai-qi(蒋凯琦) Institute of Environmental... residue via brine leaching. The results show that temperature of leaching solution has a significant effect on the recovery of Cu, In and Zn, while H2SO4 concentration has an obvious influence......
