The WO3 grade of the low-grade scheelite is 0. 39% . By adopting the lime-based methoel for the flotation and separation at the normal temperature,through the roughing closed-circuit test,the rough concentrate of scheelite with the grade of 3. 53% and the recovery of 77. 01% was obtained. Through the open-circuit test, the concentrate with the grade of 42. 12% and the recovery of 46. 26% was obtained by adding the acidized sodium silicate. The XRD spectrum analysis for the product of concentrate showed that fluorite and calcite were inhibited on the stages of roughing by lime-based method and cleaning respectively,realizing the separation of scheelite and calcareous gangue minerals effectively. This study showed that lime method is an effective way to realize the Scheelite Flotation at room temperature.%柿竹园低品位白钨矿原矿WO3品位为0.39％,采用石灰法常温浮选分离,经粗选闭路试验获得了WO3品位为3.53％,回收率77.01％的白钨粗精矿.精选开路试验,通过添加酸化水玻璃,获得了最终浮选精矿WO3品位为42.12％,回收率46.26％的良好指标.精矿产品XRD图谱分析表明,萤石和方解石在石灰法粗选段和精选段分别得到了强烈的抑制作用,白钨矿与含钙脉石矿物可实现有效分离,研究结果表明,石灰法是实现白钨常温浮选的一条有效途径.
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