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that under low cyanide concentration, gold cyanide process is controlled by CN- transfer, while at higher cyanide concentration, there forms passivation on gold surface. Therefore, chemical oxidation...; 1 Introduction It is well known that the dissolution of gold in aqueous cyanide solutions is an electrochemical process[1-2] in which the anodic reaction......
Introduction Cyanide with its competency to form a strong complex with gold, is the most preferable reagent for leaching of gold from ores. Cyanide leaching is not inherently a selective process... sufficient level of cyanide is not provided [6,7]. MUIR [4] reported that every 1% reactive copper present in the ore consumes 30 kg/t NaCN, which adversely affects the process economics. Cyanide consumption......
J. Cent. South Univ. (2020) 27: 1495-1502 DOI: https://doi.org/10.1007/s11771-020-4385-z Dissolution of gold in chalcopyrite-containing cyanide solutions YANG Wei(杨玮)1, 2, ZHANG Kai(张凯)1, 2, WANG... and Springer-Verlag GmbH Germany, part of Springer Nature 2020 Abstract: The gold dissolution in anoxic cyanide solution in the presence of chalcopyrite was studied with a rotating disc electrode......
extraction and gold recovery from cyanide tailings by cyanide process after reduction roasting and acid leachingZHENG Ya-jie,GONG Chang,SUN Zhao-ming(School of Metallurgy and Environment,Central South... tailings decreases by 38.8% after reduction roasting,sulfuric acid leaching,oxidizing roasting and cyanide leaching.Key words:cyanide tailings; reduction roasting; sulfuric acid leaching; cyanide process......
. 高铁氰化渣湿法处理的研究进展及工艺开发[J]. 山东冶金, 2010, 32(5): 3-5.ZHANG Ya-li, YU Xian-jin, ZHANG Li-peng. Research progress on hydrometallurgical treatment of cyanide tailings with high iron content and process...比为1:3,浸出时间为48 h的条件下,金的浸出率为87.83%. 关键词:氰化尾渣；脱硅；碱浸出；氰化浸出 中图分类号:TF 11.31 文献标志码:A Recovering gold from cyanide residue by alkaline predesilication-cyanide leaching technique WANG......
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process is a great challenge for the gold mining industry. The situation in China is much stricter because cyanide-containing solid wastes have been enclosed in the List of National Hazardous Waste... in cyanide-containing solid wastes is seldom reported. The organic effluent and exhaust gas produced in the sodium cyanide production process were treated by incineration at high temperatures......
is an endothermic and spontaneous process. ZnO@NiO nanocrystal is an efficient sensor for removal of cyanide from water and wastewater. Key words: cyanide removal; nano crystal; adsorption; ZnO@NiO 1..., adsorption is an attractive process, in view of its efficiency and easiness. The adsorption is one of the suitable methods for the removal of cyanide ions with high removal efficiencies. Adsorption......
the extraction process is exothermic. The calculated enthalpy change of the reaction (ΔHΘ) is about -190 kJ/mol. The copper extraction isotherms under different molar ratios of cyanide to copper are established...; guanidine 1 Introduction The cyanidation process has been successfully practiced in gold mining industry for more than 100 years[1]. Environmental constraints controlling the discharge of cyanide......
某金矿床氧化矿石工艺矿物学研究 史光大1,刘飞燕1,杨磊1 (1.中国地质科学院矿产综合利用研究所,四川,成都,610041) 摘要:某金矿床氧化矿石含金8.1g/t,含银82.5g/t,含铜0.94%.金主要以自然金,银金矿形式存在,银主要以银铁矾,角银矿形式存在,铜主要以赤铜矿,黑铜矿,蓝铜矿形式存在.矿石氧化率高,孔洞,裂隙发育,渗透性良好,适宜湿法浸出.由于粘土矿物含量高,氧化铜矿物易溶于氰化物溶液,并产生影响金,银回收的Cu(CN)2-3离子,因此推荐采用脱泥→湿法预处理→氰化浸出金,银的工艺流程,综合回收矿石中金,银,铜. 关键词:氧化矿石; 工艺矿物学; 赋存状态; 氰化浸出; Oxidized ore; Process mineralogy; Occurrence; Cyanide leaching; [全文内容正在添加中] ......
