Experiment on Efficient Separation and Recovery of Marmatite and Pyrrhotite from Liwu Copper Tailings in Sichuan
In order to comprehensively recover the valuable elements zinc and sulfur in the copper tailings of Liwu Cop-per Mine in Sichuan Province,the high-efficiency activators and collectors of marmatite and pyrrhotite were screened by prefer-ential flotation test,and the closed-circuit test was carried out.The test results show that the zinc concentrate with zinc grade of 45.62%and zinc recovery of 85.83%,the sulfur concentrate with sulfur grade of 39.98%and sulfur recovery of 75.67%can be obtained by using the closed-circuit process of one roughing four cleaning two scavenging zinc floatation and one roughing three cleaning three scavenging sulfur floatation.The zinc concentrate meets the requirements of grade seven product quality,and the sulfur concentrate meets the requirements of grade two product quality.The flotation separation of marmatite and pyr-rhotite is well realized.
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