云南某硫化锑矿石选矿试验研究

Experimental Study on Beneficiation of A Antimony Sulfide Ore in Yunnan

为高效开发利用云南某硫化锑矿,在原矿工艺矿物学研究的基础上,对其进行了详细选矿试验研究。结果表明:矿石中主要有价元素锑品位为2.16%,锑主要以硫化物的形式存在,氧化率仅为4.15%;锑矿物主要为辉锑矿,硫化物主要为黄铁矿,脉石矿物以石英、绢云母和方解石为主;辉锑矿的嵌布粒度较粗,主要分布在0.02~2.56 mm粒级,磨矿细度-0.074 mm占74.56%时锑矿物的单体解离度大于90%。基于矿石性质研究结果,在磨矿细度-0.074 mm占74.56%的条件下,以六偏磷酸钠为分散剂、硝酸铅为活化剂、M7为捕收剂、松醇油为起泡剂,采用“1粗3精2扫”的闭路浮选流程,可获得锑品位为35.30%、锑回收率为93.52%的锑精矿。研究结果可为矿山后续中深部硫化矿石的选别及现有流程的优化提供有益参考。

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 fine-ness of-0.074 mm is accounting for 74.56%,the monomer separation degree of stibnite is greater than 90%.Based on the re-search 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 roug-hing,three cleaning and two scavenging".The research results can provide a useful reference for the subsequent sorting of sul-fide ores in middle and deep mines and the optimization of the existing process.