关键词: 硫磺, 锑白, 回收工艺, 湿法工艺

Abstract: A sulphur reclaiming method from leaching residue of antimony white with hydrometallurgical process was introduced.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 ℃.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.

Key words: sulphur, antimony white, reclaiming technology, hydrometallurgical process