This paper takes a fluorspar and barite ore in Yunnan as the research object.The ore contains 33.46％ fluorspar and 52.73％ barite.It is difficult to separate fluorspar and barite because of the similar floatability.In order to utilize the mineral resources,a beneficiation process of bulk flotation followed by fluorspar-barite separation was adopted.The bulk flotation was carried out under the condition of grinding fineness 80％-passing 74 μm and pulp pH =9,using sodium silicate as inhibitor and sodium oleate as collector.The aim of the bulk flotation is pre-concentrating of the aimed minerals and discarding tailings.The fluorspar-barite separation is carried out by inhibiting barite and floating fluorspar under the condition of pulp pH =6,using sodium silicate,aluminum sulfate and tannin extract as inhibitor,and sodium oleate as collector.The locked-cycle flotation test obtained a fluorite concentrate grading 94.42％ with a fluorite recovery of 87.77％,and a barite concentrate grading 91.89％ with a barite recovery of 88.66％.%以云南某萤石与重晶石共生矿为研究对象,该矿含萤石33.46％,重晶石52.73％,萤石与重晶石含量高.由于萤石与重晶石可浮性相近,分离难度大.为了综合开发利用该矿产资源,对该共生矿进行了选矿试验研究.试验采用了先混合浮选再分离浮选的工艺流程.混合浮选在磨矿细度-74 μm占80％的条件下,调整pH值至9,以水玻璃为抑制剂、油酸钠为捕收剂将目的矿物先富集,在此过程中同时抛尾除杂,混合浮选所得精矿再进行分离浮选;分离浮选通过抑制重晶石浮选萤石实现,适宜的pH值为6,以水玻璃、硫酸铝、栲胶为抑制剂,以油酸钠为捕收剂,最终实现了萤石和重晶石的分离.通过全浮选闭路试验,得到品位为94.42％、回收率为87.77％的萤石精矿和品位为91.89％、回收率为88.66％的重晶石精矿.
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