摘要
介绍了一种从湿法生产锑白渣中回收硫磺的方法。以硫化铵溶液作为提取液浸取矿渣,矿渣中的硫可生成多硫离子而溶解转入溶液中,抽滤分离出滤液,将产生的气体导出并吸收,吸收后可返回循环使用;滤液热分解后可得到硫磺产品。最佳提取条件:固液比为1∶20、浸取温度为20℃、浸取时间为2 h。该工艺设备及提硫操作简单,硫化铵可循环利用,成本较低,硫磺产品的质量较好,硫的总回收率可达99%以上。同时利用了浸锑废渣,实现资源综合回收利用,又减少环境污染和废渣的堆积量。
A sulphur reclaiming method from leaching residue of antimony white with hydrometallurgical process was intro- duced.Ammonia sulfide solution was selected as extracted liquor,and sulphur in leaching residue could form polysulfide ions, which will dissolve in the solution.The filtrate was separated out through suction filtration and the thermal decomposition was carried out.The produced gas was led out and absorbed, which can be used circularly.Finally, sulphur product could be prepared through thermal decomposition of filtrate.The best extraction conditions included the ratio of solid to liquid of 1：20, leaching time of 2 h, and leaching temperature of 20 ~C .The process had many advantages, such as equipment, technology, and sulphur extracting operation were very simple, the extract liquid could be returned for recycling, the cost was lower, the quality of the sulphur products was good ,and the total sulphur recovery could reach over 99%.At the same time ,the waste residue of antimony prodcution was recycled and utilized comprehensively, so that the pollution of the environment and the pile-up of waste residue could be reduced.
出处
《无机盐工业》
CAS
北大核心
2012年第8期37-39,共3页
Inorganic Chemicals Industry
关键词
硫磺
锑白
回收工艺
湿法工艺
sulphur
antimony white
reclaiming technology
hydrometallurgical process
