云南文山多金属含锡硫化矿中含硫矿物的工艺矿物学研究及回收工艺

Process mineralogical research and recovery process of sulfur-containing minerals in polymetallic tin-containing sulfide ore in Wenshan,Yunnan

以云南文山多金属含锡硫化矿为研究对象,通过X-射线衍射(XRD)、X-荧光光谱分析(XRF)、光学显微镜、扫描电镜(SEM)和矿物解离分析(MLA)等手段对该矿进行了系统的工艺矿物学研究并提出选别方案。结果表明:回收价值最高的元素为锡,主要以锡石的形式存在;硫化矿包括磁黄铁矿、毒砂、闪锌矿和黄铁矿等,其中磁黄铁矿为含硫主要矿物;矿样中含有少量的磁铁矿;脉石矿物主要是绿泥石、石英和黑云母等;选矿试验采用“磁选除铁—37μm分级—粗粒重选—细粒浮选”联合工艺流程,可获得S品位和回收率分别为21.60%和81.42%的细硫精矿,S品位和回收率分别为26.19%和87.71%的次硫精矿,脱硫效果较好。结果可为锡石综合回收奠定基础。

The process mineralogy of the mine was systematically studied by using XRD,XRF,optical microscope,scanning electron microscopy(SEM),and MLA analysis,and a selection scheme was proposed.The polymetallic tin-containing sulfide ore in Wenshan,Yunnan,was used as the research object.The results show that the element with the highest recovery value is tin,mainly in the form of cassiterite.Sulfide ores include pyrrhotite,toxic sand,sphalerite and pyrite,among which pyrrhotite is the main sulfur-containing mineral.The sample contains a small amount of magnetite.The main gangue minerals are mainly chlorite,quartz and biotite.The concentration test utilizes a combined method of“magnetic separation iron removal-37μm classification—coarse grain gravity—fine grain flotation”to produce fine sulfur concentrate with S grade and recovery rate of 21.60%and 81.42%,respectively,and subsulfur concentrate with S grade and recovery rate of 26.19%and 87.71%,respectively,with good desulfurization effect,laying the groundwork for thorough cassiterite recovery.