川西某磷矿石选矿试验研究

Experimental Study on Beneficiation of a Phosphate Ore in Western Sichuan

川西某磷矿石P_(2)O_(5)品位为19.34%,主要脉石矿物为碳酸盐和硅酸盐类矿物。正浮选—反浮选和单一反浮选工艺对比探索试验表明,采用单一反浮选工艺获得的磷精矿磷回收率远高于正浮选—反浮选,且单一反浮选流程简单,操作性强。在此基础上进行的反浮选条件试验表明:以硫酸为pH调整剂,磷酸为抑制剂,WF-01为捕收剂,经1粗2精2扫反浮选,可以获得产率为51.25%,P_(2)O_(5)品位30.67%,回收率为81.28%的磷精矿。试验结果可以为该地区普遍存在的同类型大量中低品位磷矿石分选提供参考。

The P_(2)O_(5)grade of a phosphate rock in Western Sichuan is 19.34%,and the main gangue minerals are carbonate and silicate minerals.The comparative exploration test of direct flotation-reverse flo⁃tation and single reverse flotation shows that the phosphorus recovery rate of phosphate concentrate obtained by single reverse flotation process is much higher than that of direct flotation-reverse flotation,and the sin⁃gle reverse flotation process is simple and operable.On this basis,the followed reverse flotation condition test shows that:with sulfuric acid as pH regulator,phosphoric acid as inhibitor,WF-01 as collecting agent,through one roughing two cleaning two scavenging reverse flotation,a phosphate concentrate with yield of 51.25%,P_(2)O_(5) grade of 30.67%and recovery of 81.28%can be obtained.The test results can provide a refer⁃ence for the separation of a large number of medium and low grade phosphate rocks of the same type in this area.