Abstract: The iron concentrate of WuSteel Chengchao Iron Mine contained about 0.3% sulfur. To reduce the sulfur content to below 0.1%, laboratory flotation test was made. Flotation using the ethyl xanthate and butyl xanthate collector combination could reduce the sulfur in the iron concentrate to 0.095% but needed a collector dosage of 500 g/t, which could be reduced to 200 g/t when the iron concentrate was ground to 82% -400 mesh. Moreover, the sulfur content in the iron concentrate could be further reduced to 0.080%.

Key words: Iron concentrate, Sulfur reduction, Flotation