关键词: 石灰, 新型硫抑制剂, 闪锌矿, 黄铁矿, 锌硫分离

Abstract: The zinc sulfide ores in Ximeng area of Inner Mongolia contains zinc of 1. 46% and iron of 22. 07%. The main metallic minerals in ores are sphalerite,magnetite,pyrite and pyrrhotite. The gangue minerals in ores are mainly quartz,calcium iron garnet,calcite,mica and amphibole. In order to solve the safety and environmental problems caused by the large amount of lime used in the flotation process of the ore,an novel surfur depressant HD12 was used to replace lime and the beneficiation experiment was carried out. The appropriate reagent system was determined by condition tests as follow:HD12 of 10 g / t,copper sulfate of 240 g / t,sodium butyl xanthate of 80 g / t in the grinding fineness of -0. 074 mm accountng for 75%. On this basis, the closed-circuit flotation process of " one roughing flotation,two cleaning flotation and three scavenging flotation" was adopted to treat the ore. Finally,the zinc concentrate with Zn grade of 50. 04% and Zn recovery rate of 88. 97% could be obtained. The efficient recovery of zinc resources from the zinc sulfide ores is realized. Using HD12 as a sulfur inhibitor,the zinc separation index is excellent,and the dosage of the reagent is significantly reduced,which could replace lime for the separation of sphalerite from pyrite and magnetite.

Key words: lime,novel surfur depressant,sphalerite,pyrite,separation for zinc and sulfur