Study on Beneficiation Process of a High Carbon Refarctory Sb Ore in Hunan

The antimony content of some Sb ore in Hunan is 3.19%,of which is about 95.30% antimony sulphide.Small amounts of antimony occures on antimony oxide or antimonate,and accounts for about 4.70% of total antimony.The carbon content is 6.43%,where in the inorganic carbon reaches as high as 5.46%.The ore belongs to the high carbon refractory antimony sulphide ore.After a serious of tests,it determined the flotation+gravity separation+flotation combined process to recovery antimony from the ore.Finally the mixed antimony ore was obtained,of which antimony grade is 58.71% and the recovery rate is 93.75%.