 The extraction of antimony from ores depends on the quality of the ore and composition of the ore . Most antimony is mined as the sulfide ; lower @-@ grade ores are concentrated by <unk> flotation , while higher @-@ grade ores are heated to 500 – 600 ° C , the temperature at which stibnite <unk> and is separated from the <unk> minerals . Antimony can be isolated from the crude antimony sulfide by a reduction with scrap iron : 
