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我县萤石资源丰富,开采时虽将块状捡出分级出售,但还有许多萤石粉和小颗粒同砂子混在一起,被作为废物丢弃。1982年,我们建了一座日处理50吨萤石粉选厂,从中回收萤石。原矿中CaF_2含量48％左右,脉石矿物主要有石英、硅酸盐类。生产流程为一段磨矿,一粗六精一扫。精矿CaF_2含量98％以上,回收率达92％,杂质SiO_2<0.8％、
Fluorite resources are abundant in our county. Although the blocks are picked and graded for sale at the time of mining, many fluorite powders and small particles are mixed with the sand and discarded as waste. In 1982, we built a 50 tonne fluorite powder processing plant to recover fluorite from it. Raw ore CaF_2 content of about 48%, gangue minerals are mainly quartz, silicate. Production process for a period of grinding, a crude six swept away. The content of CaF_2 in concentrate is above 98%, the recovery rate is up to 92%, the impurity SiO_2 is less than 0.8%