共搜索到118条信息,每页显示10条信息,共12页。用时:0小时0分0秒468毫秒
常数的顺序为:Au<Ag<Cu.在氰化钠溶液中加入微量硫化钠后,硫离子抑制氰化反应的影响程度则为:Au>Ag>Cu.分析讨论了电化学反应机理,提出了相应的观点并对实验结果进行了解释. 关键词:金;银;铜;氰化溶解;硫离子 中图分类号:0643.12 文献标识码:A Comparison of cyanidation rates of gold, silver and copper and influences of sulfion on them WANG Yu, CHEN Jing, WEI Qun-yan, XIE Qi-ying (Department of Chemistry, Yunnan University, Kunming 650091, China) Abstract: The cyanidation......
leachable sulphide gold concentrates, and Pb2+ and Ag+ only had co-intensifying effect on the easily leachable sulphide gold concentrate. Key words: gold leaching; co-intensification; cyanidation... rate of gold cyanidation and a series of intensification techniques have been worked out. Among these techniques, hydrogen peroxide assistant leaching has been proved to be an effective method......
Trans. Nonferrous Met. Soc. China 28(2018) 542-555 Impact of silver sulphides on gold cyanidation with polymetal sulphides Muhammad KHALID, LARACHI Department of Chemical Engineering, Laval... and sphalerite. Gold dissolution was retarded for gold and silver minerals associated with chalcopyrite and stibnite. Key words: silver mineral; gold cyanidation; packed-bed reactor; sulphide mineral......
flow diagram of common cyanidation leaching 1 氰渣脱氰技术的分类方法 根据氰渣的利用和处置类别不同,标准HJ 943-2018将氰渣脱氰处理适用技术分为四类:1) 金矿石氰渣尾矿库处置;2) 金精矿氰渣尾矿库处置;3) 堆浸氰渣处置;4) 氰渣利用.这一分类方法从金矿的处理工艺类型和最终处置办法两方面入手,给出了相应的脱氰处理技术.如...: 13-223. SONG Yong-hui, LAN Xin-zhe, HE Hui. Theory and method of gold extraction and cyanidation wastewater treatment[M]. Beijing: Metallurgical Industry Press, 2015: 13-223. [4] 许 勇, 马春红. 黄金行业的"生死线......
提金工艺中"三废处理技术"[J]. 黄金, 2008, 12(29): 55-60. XING Xiang-dong, LAN Xin-zhe, SONG Yong-hui, ZHANG Jing. Disposal advances on "three wastes" treatment in the gold cyanidation extraction process[J]. Gold...; cyanidation; low concentration; gold Foundation item: Projects(51574213, 21606248) supported by the National Natural Science Foundation of China; Project(2013CB632602, 2012CBA01203) supported......
gold ores associated with rich copper and trapped in pyrite and quartz were studied. With conventional technique (all-sliming cyanidation), the gold recovery rate is only 51.78%. To eliminate the negative effects of copper and pyrite on cyanidation and increase the gold recovery rate, the investigation on bio-heap leaching pretreatment was made, by which Cu would be dissolved and gold would......
Beneficiation of the gold bearing ore by gravity and flotationAlim Gül,Olga Kangal,Ayhan A. Sirkeci,Güven nalMineral Processing Engineering Department Istanbul, Faculty of Mines, Technical University, Istanbul 34469, Turkey摘 要:Gold concentration usually consists of gravity separation, flotation, cyanidation, or the combination of these processes......
to sulfate. After alkaline leaching, cyanidation and adsorption were carried out for 24 h. The dissolution of gold by NaCN is increased to 95.3% from 12.8% before pretreatment, and meanwhile 99.3......
96.66 wt%. The cyanidation results showed that the cyanide gold leaching rate of acid leaching residues was close to 100 wt%. However, the maximum cyanide gold leaching rate of gold calcine was only......
by direct cyanidation was only 59.86%. After biooxidation pretreatment, the sulfide minerals were almost completely decomposed, 92 wt% of the mineral particles of the biooxidation residue were decreased......