某难选贫辉碲铋矿的选矿工艺研究  

Beneficiation of a Refractory Tetradymite Ore

作　　者：冯海亮[1] 车小奎[1] 郑其[1] 马立成[1] 王雷[1] 

机构地区：[1]北京有色金属研究总院稀有金属冶金材料研究所,北京100088

出　　处：《稀有金属》2016年第7期687-694,共8页Chinese Journal of Rare Metals

基　　金：国家科技部高技术研究发展计划(863计划)项目(2013AA065703)资助

摘　　要：碲被广泛应用于冶金、电子、化工、玻璃、陶瓷及医药等行业和领域,特别是在新能源新材料、国防与尖端技术领域中具有不可替代性,是一种具有重大前景的战略资源。某贫碲矿石矿物组成复杂,共生关系密切,同时部分磁黄铁矿在磁性、可浮性与辉碲铋矿相似,属较难分选矿物。针对矿石特点,采用磁-浮选联合的选矿工艺以及粗精矿再磨工艺,解决了辉碲铋矿与磁黄铁矿难分离的问题。试验选取乙硫氮与丁基黄药作为浮选辉碲铋矿的混合捕收剂,氧化钙、水玻璃与亚硫酸钠作为脉石矿物与硫铁矿的抑制剂,经预先弱磁选脱硫,脱硫尾矿经两次粗选,一次扫选,粗精矿再磨两次精选,可获得Te精矿品位为18.94%,回收率为91.40%的良好指标。磁-浮选联合流程及粗精矿再磨工艺,改善了Te的浮选指标,实现了难选低品位辉碲铋矿的有效回收,研究结果可为该地辉碲铋矿物的有效开发利用提供技术指导。Tellurium was widely applied in the area of metallurgy, electronics, chemicals, glass, ceramic, pharmaceutical and so on. Especially, it was irreplaceable in the new energy and advance materials, national defense and cutting-edge technology, which was considered an important strategic resource by many countries and governments. A certain poor tellurium ore had a close associated rela- tionship with each other and owned complicated ore nature. Moreover, some pyrrhotite in magnetism and flotation were similar to tetrad- ymite, which increased the difficulty in separation from each other. In view of its characteristics, the process of magnetic-flotation sepa- ration and rough concentrate regrinding were adopted to solve the common problem of the separation of tetradymite and pyrrhotite. The test selected the combined collector diethyldithioearbamate and butyl xanthate as the collector, calcium oxide, sodium silicate and sodi- um sulfite as the depressant. The technical indexes such as the grade of Te concentrate 18.94% and the recovery 91.40% were ob- tained by twice roughing, once scavenging and twice the rougher concentrate cleaning after secondary grinding. The process of magnet- ic-flotation separation and the rougher concentrate regrinding improved the flotation indexes of tetradymite, realizing efficient recovery of refractory tetradymite ore in the ore, which made it possible to exploit the tetradymite ore in this place.

关 键 词：辉碲铋矿 磁-浮联合流程 粗精矿再磨 乙硫氮 

分 类 号：TD92[矿业工程—选矿]