云南某萤石与重晶石共生矿选矿试验研究

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-74μm占80%的条件下,调整p H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p H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。

Research on Flotation of a Fluorspar-barite Ore in Yunnan

This paper takes a fluorspar and barite ore in Yunnan as the research object. The ore is high in fluorspar and barite. The ore contains fluorspar which grade is 33.46% and barite which grade is 52.73%. It is difficult to separate fluorspar and barite because of the similar floatability, so it is significant to utilize the mineral resources with beneficiation tests. The bulk flotation and separate flotation processes were adopted in the experiment. The bulk flotation was carried out under the conditions: the grinding fineness of -0.074mm accounted for 80%, the pH value is adjusted to 9, using sodium silicate as inhibitor and sodium oleate as collector. The aim of bulk flotation is pre-concentrating of the aimedSminerals and discardingStailings. TheSseparatingSflotationSis tested by inhibiting barite and floating fluorspar. The separating flotation which separating fluorspar and barite was carried out under the conditions: the pH value is adjusted to 6, using sodium silicate, aluminum sulfate and tanninSextract as inhibitor, using sodium oleate as collector. After the closed circuit flotation experiments, the grade of fluorite concentrate is 96.13% and the recovery rate is 88.74%, and the grade of barite concentrate is 87.65%, and the recovery rate is 97.78%.