关键词: 辉锑矿, 锑硫混浮, 浮选, 硫化锑

Abstract: In order to efficiently exploit and utilize an antimony sulfide ore in Yunnan Province,a detailed beneficiation experiment was conducted on the basis of the process mineralogy study of the raw ore. The results showed that the grade of the main valuable element antimony in the ore is 2. 16%,and the antimony mainly exists in the form of sulfide with the oxidation rate of 4. 15%. The antimony mineral is mainly stibnite,the sulfide is mainly pyrite,and the gangue mineral is mainly quartz, sericite and calcite. The distribution size of stibnite is coarse,mainly in the range of 0. 02~ 2. 56 mm. When the grinding fineness of -0. 074 mm is accounting for 74. 56%,the monomer separation degree of stibnite is greater than 90%. Based on the research results of ore properties,under the condition of grinding fineness of -0. 074 mm accounting for 74. 56%,using sodium hmetaphosphate as dispersant,lead nitrate as activator,M7 as collector and terpinol oil as foaming agent,antimony concentrate with a grade of 35. 30% and recovery rate of 93. 52% could be obtained after the closed-circuit flotation process of " one roughing,three cleaning and two scavenging" . The research results can provide a useful reference for the subsequent sorting of sulfide ores in middle and deep mines and the optimization of the existing process.

Key words: stibnite,antimony and sulfur mixed flotation,flotation,antimony sulfide