梅山铁矿硫浮选原矿和硫精矿的工艺矿物学研究

Study on Process Mineralogy of Raw Ores and Concentrate of Sulfur Flotation in Meishan Iron Mine

针对梅山铁矿硫浮选所得硫精矿品位不高和硫回收率较低的问题,运用矿物解离分析仪(MLA)测试与化学分析、XRD分析等相结合的手段,详细研究了浮选原矿和硫精矿中硫矿物的工艺矿物学特征,重点分析了浮选回收主要矿物黄铁矿的嵌布特征、粒度及解离特性等,查明了浮选原矿粒度较粗、黄铁矿单体解离不充分是其浮选选别指标较差及浮选铁尾矿中硫含量较高的主要原因,提出了浮选粗精矿再磨再选的建议,为梅山铁矿浮硫工艺流程优化提供了理论依据。

According to the low grade and low recovery rate of sulfur concentrate in the flotation process of Meishan iron ore,the mineralogy characteristics of sulfide minerals contained in the raw ores and the flotation concentrate were analyzed in detail using Mineral Liberation Analyzer(MLA)combined with chemical analysis and X-ray diffraction(XRD).The embedded characteristics,particle size distribution and the liberation degree of pyrite,which was the mainly recoverd mineral,were basically determined.It was found that the coarse granularity of raw ores and insufficient liberation of pyrite were blame for the poor separation results and the high sulfur content in the iron tailing.Regrinding and re-concentration of rough flotation concentrate was proposed to solve this problem.The above research could provide a theoretical basis for the optimization of sulfur flotation process in Meishan Iron Mine.