从湖南某高钙钨矿中常温浮选白钨矿与萤石

湖南某矽卡岩型含硫钨矿资源，矿物组成复杂，有用矿物主要为白钨矿和萤石。为了高效开发利用该资源，对该矿石进行了选矿试验研究。结果表明，用4 000 g/t模数为2.8的水玻璃对矿浆浓度为50%白钨精矿1调浆1.5 h，然后进行连续4次常温空白精选，可有效提高白钨精矿WO₃品位；矿石在磨矿细度为-0.074 mm占80%的情况下1次开路浮选脱硫，脱硫产品1粗2扫5精、中矿顺序返回闭路流程选白钨矿，选钨尾矿1粗2扫5精、中矿顺序返回闭路流程选萤石，最终获得了WO₃品位为58.26 %、回收率为92.89％的白钨精矿，以及CaF₂品位为98.36%、回收率为89.85%的萤石精矿。闭路试验流程是该矿石低耗、高效开发利用流程。

Flotation Separation of Scheelite and Fluorite from Tungsten Minerals with High Calcium at Room Temperature

A sulfur skarn tungsten ore resources in Hunan owns complex composition,and the main useful minerals are scheelite and fluorite.In order to high efficiently develop and utilize the ore,beneficiation tests on the ore were carried out.The results showed that under the case that silicate with modulus of 2.8 is mixed with scheelite concentrate 1 with pulp density of 50% for 1.5 h,and through four cleanings flotation at room temperature,the WO₃ grade of scheelite was effectively improved.Under the grinding fineness of -0.074 mm 80%,sulfure was removed through one open circuit flotation.Scheelite concentrate from the desulfurized product was achieved through the closed-circuit process of one roughing,two scavenging,five cleaning and middles back to the flow-sheet in order.Fluorite was obtained from tailings above through closed circuit process of one roughing,two scavenging,five cleaning and middles back to the flow-sheet in order.Finally,scheelite concentrate with WO₃ grade of 58.26% and WO₃ recovery of 92.89%,and fluorite concentrate with CaF₂ grade of 98.36% and recovery of 89.85% were achieved respectively.The closed-circuit process realized a low-consumption and high-efficiency recovery of the ore.