Abstract: There is 0.076% Mo in a low grade molybdenum ore from Xinjiang,and also 0.033% Cu and 1.232% S associated with molybdenum.Molybdenum,copper and sulfur mainly exist in forms of molybdenite,chalcopyrite,and pyrite,but it is difficult to be separated from each other for their close intergrowth.Beneficiation experiment on comprehensive recovery of molybdenum,copper,and sulphur was conducted based on the ores properties.Firstly,Mo-Cu-S bulk flotation tests were conducted after grinding the raw ore at 85% -0.074 mm.Secondly,separation flotation of molybdenum-copper from sulfur were carried out after grinding the rough Mo-Co-S concentrate.Then,molybdenum-copper bulk concentrates were put into the separation flotation of molybdenum from copper.Novel collector GZW101 and depressor GTS were used in Mo-Cu-S bulk flotation,also new depressor GLN was brought in separation flotation of molybdenum and copper.Molybdenum concentrate with 47.03% Mo and recovery of 73.20%,copper concentrate with 14.89% Cu and recovery of 77.26%,and sulfur concentrate with 54.26% S and recovery of 88.94% was obtained.The flotation results provide basis for high efficient utilization of the ore.

Key words: Low grade molybdenum ore, Associated copper or sulfur, Mo-Cu-S bulk flotation, Separation flotation of molybdenum-copper from sulfur, Separation flotation of molybdenum from copper, Regrinding