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黄金科学技术 ›› 2016, Vol. 24 ›› Issue (3): 106-110.doi: 10.11872/j.issn.1005-2518.2016.03.106

• 冶炼技术与装备研发 • 上一篇    下一篇

含氰贫液酸化产物中铜元素回收工艺研究

赵可江   

  1. 灵宝黄金股份有限公司黄金冶炼分公司,河南  灵宝   472500
  • 收稿日期:2016-01-19 修回日期:2016-03-23 出版日期:2016-06-28 发布日期:2016-10-08
  • 作者简介:赵可江(1981-),男,河南新乡人,工程师,从事黄金湿法冶金和污水处理研究工作。zkjly2@163.com

Research on Processes of Copper Recovery from Product in Acidified Barren Cyanide Solution

ZHAO Kejiang   

  1. Gold Smeltery Branch of  Lingbao Gold Co.,Ltd.,Lingbao   472500,Henan,China
  • Received:2016-01-19 Revised:2016-03-23 Online:2016-06-28 Published:2016-10-08

摘要:

金精矿焙烧—氰化系统含氰贫液闭路循环需要定期开路部分贫液,贫液中的Cu元素具有一定的回收价值,本文在含氰贫液酸化法处理工艺基础上探索含氰贫液中Cu元素回收工艺的可行性。酸化处理后CN-挥发率为95.42%,铜沉淀率为97.82%。酸化后贫液固液分离所得酸化沉淀含铜22.77%~35.01%,采用焙烧—酸浸—萃取工艺回收铜,最佳实验条件如下:焙烧温度为640 ℃,液固比为5∶1,H2SO4质量浓度为5%,酸浸时间为3 h,此时可获得铜浸出率为92.27%~95.00%。以20%Lix984作为萃取剂,调节浸出液pH=2.3,有机相和水相相比为1∶1,萃取时间为3~5 min时,单级铜萃取率为98.96%;酸化后贫液固液分离所得液体平均铜浓度为72.89 mg/L,以硫化法深度沉淀铜,当Na2S用量为0.4~0.6 g/L,沉淀时间为1 h时,铜沉淀率为92.21%~99.09%。

关键词: 焙烧&mdash, 氰化, 含氰贫液, 铜, 酸化法, 沉淀, 焙烧&mdash, 酸浸&mdash, 萃取, 硫化钠

Abstract:

In the system of gold concentrate roasting-cyanide,the closed-circuit of barren solution containing cyanide need to  be opened periodically,the copper in which has some recovery value.The feasibility of recovering copper from barren solution containing cyanide is investigated on the basis of acidification process.After the acidification the evaporation rate of cyanide ion is 95.42% and the precipitation rate of copper is 97.82%.There is 22.77%~35.01% of copper in the acid sedimentation separated from acidified barren liquid.The copper can be reclaimed by a roasting-acid leaching-extraction technique,and the best experiment conditions are as follows:roasting temperature is 640 ℃,Liquid-solid ratio is 5∶1,the concentration of H2SO4 is 5%,acid leaching time is 3 hours,and the copper leaching rate is up to 92.27%~95.00%.If 20% Lix984 is used as extraction agent,pH value of leaching solution is 2.3,organic and aqueous phase ratio(O/A) is 1∶1,one stage copper extraction rate is 98.96% after 3~5 min extraction.The copper concentration in the solution separated from acidified barren liquid is 72.89 mg/L,sulfurized method is used in the copper deposit,if Na2S is 0.4~0.6 g/L,the copper sedimentation rate is up to 92.21%~99.09% after one hour.

Key words: roasting cyanide, barren solution containing cyanide, copper, acidification method, sedimentation, roasting-acid leaching-extraction, sodium sulfide

中图分类号: 

  • TF831 

[1] 玉涵,胡显智.氰化及非氰化提金方法综述[J].云南冶金,2010(3):9-12.
[2] 黄礼煌.金银提取技术[M].第2版.北京:冶金工业出版社,2001:133-273.
[3] Adams M D.Impact of recycling cyanide and its reaction products on up stream unit operations[J].Minerals  Engineering,2013(53):241-255.
[4] Estay H, Becker J, Carvajal P,et al.Predicting HCN gas generation in the SART process[J].Hydrometallurgy,2012(113/114):131-142.
[5] 兰新哲,张聪惠,党晓娥,等.提金氰化物回收循环再用技术研究新进展[J].黄金科学技术,1999,7(3):40-45.
[6] 胡杨甲,贺政,赵志强,等.氰化浸出废水处理方法研究进展[J].中国矿业,2015(增):219-223.
[7] 梅治福,丁成,王莹,等.SO2/Air法处理含氰尾矿浆氧化反应器的设计与应用[J].黄金,2015,36(12):44-46.
[8] 曹会兰.锌粉置换提金中铜影响的研究[J].宝鸡文理学院学报(自然科学版),2003,23(1):39-41.
[9] 叶跃威,杨建国.用锌粉从高铜铅含氰贵液中置换金银[J].湿法冶金,2007,26(3):150-153.
[10] 杨要峰,李林波.黄金冶炼过程含重金属氰化废水处理研究[J].黄金,2011,32(8):58-60.

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