采用氰化浸出工艺从预处理后的难处理金精矿中提取金、银。最佳氰化浸出条件为：液固比4∶1，保护碱Na2 CO3调节pH值9．5～10．5，氰化钠质量分数0．4％，氰化浸出96 h。在此条件下，金、银浸出率分别达到96．53％、75．37％。同时，探索了复合保护碱对金、银浸出率的影响，使用复合保护碱m（Na2CO3）∶m（NaOH）＝3∶1，金、银的浸出率分别达97．36％、75．59％，比采用单一保护碱Na2 CO3时分别提高0．83％和0．22％。
Gold and silver were extracted from the pretreated refractory gold concentrate by cyanide process .Un-der the optimum cyanidate conditions which are the concentration of sodium cyanide of 4%,the liquid to solid ratio of 4∶1,and the adjusted pH with Na 2 CO3 of 9.5-10.5 and the leaching time of 96 h,leaching rate of gold and silver re-spectively reaches 96.53%and 75.37%.The effect of complex protective alkali on the leaching rate of gold and sil-ver was investigated.The influence of complex protection with alkali m(Na2CO3)∶m(NaOH) =3∶1 on the leaching rate is explored.The results show that leaching rate of gold and silver respectively were 97.36 % and 75.59 %, which is 0.83 %and 0.22 %higher than using Na 2 CO3 as single protective alkali .
参考文献
| [1] | 董春艳,李碧乐,迟效国,李雪梅,张渊.硫脲浸取某含金矿石的试验研究[J].黄金,2005(08):34-36. |
| [2] | 宋永辉,兰新哲.含硫试剂中金的溶解[J].有色金属,2005(01):49-52. |
| [3] | 薛光,任文生.我国金精矿焙烧-氰化浸出工艺的发展[J].中国有色冶金,2007(03):44-49. |
| [4] | 王瑞祥,刘建华,夏李斌.从高酸浸出钴渣中回收金、银的试验研究[J].黄金,2007(05):32-35. |
| [5] | 李绍卿,刘刚,孙斌,左可胜.高砷高硫金矿石或金精矿氰化浸金工艺[J].黄金,2002(05):29-31. |
| [6] | 佟琳琳,姜茂发,杨洪英,殷书岩.湖南某高砷难处理金精矿的细菌氧化-氰化提金实验研究[J].贵金属,2008(01):15-18. |
| [7] | 常耀超,刘大学,王云,余群波,韦其晋.含砷、锑难处理金精矿提金工艺研究[J].有色金属（冶炼部分）,2011(10):31-33. |
| [8] | 李云,王云,袁朝新,孙建伟.提高含砷金精矿两段焙烧焙砂中金浸出率的研究[J].有色金属（冶炼部分）,2010(06):33-36. |
| [9] | 薛光,王俊杰,于永江.提高云南某金矿金氰化浸出率的试验研究[J].黄金,2008(11):41-42. |
| [10] | Lu Chenchen,鲁琛琛,林舒,温志忠,李少卿,董岁明.砷锰粘土金银矿中金、银的氰化试验研究[J].稀有金属,2009(02):272-275. |
| [11] | 郭持皓,袁朝新,孙聪.高铜金精矿提取金铜工艺研究[J].有色金属（冶炼部分）,2010(06):37-40. |
| [12] | 段东平,周娥,陈思明,李婷,夏光祥.高砷硫金精矿提金研究[J].有色金属（冶炼部分）,2012(01):39-41. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%