
基本信息:
- 专利标题: 一种从生产银硒过程中的废水渣中回收稀贵金属的方法
- 专利标题(英):Method for recovering rare noble metal from waste water slag of process of producing silver and selenium
- 申请号:CN201210385800.0 申请日:2012-10-12
- 公开(公告)号:CN102978400A 公开(公告)日:2013-03-20
- 发明人: 王玉华 , 贺来荣 , 朱纪念 , 孙渊君 , 张立岩 , 王玉琴 , 张燕 , 赵静
- 申请人: 金川集团股份有限公司
- 申请人地址: 甘肃省金昌市金川路98号
- 专利权人: 金川集团股份有限公司
- 当前专利权人: 金川集团股份有限公司
- 当前专利权人地址: 甘肃省金昌市金川路98号
- 代理机构: 甘肃省知识产权事务中心
- 代理人: 鲜林
- 主分类号: C22B7/00
- IPC分类号: C22B7/00 ; C22B3/08 ; C22B3/44
The invention provides a method for recovering rare noble metal from waste water slag of a process of producing silver and selenium. The recovering steps are as follows: a. adding the waste water slag of the process of producing silver and selenium into a reaction kettle, adding a sulfuric acid solution to make a slag to liquid ration 5-5.5, reacting for 30-60 min at a room temperature with stirring, settling for 5-24 hours at the room temperature, and filtering after the settlement to obtain leaching slag enriched with selenium noble metal and a leaching solution with a small amount of residual noble metal, the leaching solution being for use in the next step; and b. putting the leaching solution with the small amount of the residual noble metal in the reaction kettle; heating to a temperature of 80-95 DEG C, adding discharge waste liquid produced by sodium sulfite desulfurization in the production process of the rare noble metal, wherein the adding amount of a precipitant is 1.1-1.3 times that of a theoretical usage amount of Cu2+ ions in the leaching solution with the small amount of the residual noble metal, reacting for 30-120 min at the temperature of 80-95 DEG C, and filtering to obtain cuprous sulfide slag and a solution after the reaction. The method is simple in process flow and circularly economic in waste utilization, and has low production cost and high metal recovery rate.
公开/授权文献:
- CN102978400B 一种从生产银硒过程中的废水渣中回收稀贵金属的方法 公开/授权日:2015-02-18
IPC结构图谱:
C | 化学;冶金 |
--C22 | 冶金(铁的冶金入C21);黑色或有色金属合金;合金或有色金属的处理 |
----C22B | 金属的生产或精炼;原材料的预处理 |
------C22B7/00 | 处理非矿石原材料(如废料)以生产有色金属或其化合物 |