石油磺酸钠低温浮选石英型萤石的试验研究

Experimental Study on Low-temperature Flotation of Quartz-type Fluorite with Petroleum Sodium Sulfonate

针对含CaF247.48%、SiO239.70%的石英型萤石矿,采用常规萤石浮选捕收剂油酸钠在低温度的矿浆环境下较难获得良好的选别指标,为了改善该萤石矿在低温下的浮选效果,采用耐低温性好的石油磺酸钠捕收剂(PSK-13)进行浮选试验研究。结果表明,以碳酸钠作调整剂、水玻璃作抑制剂、PSK-13作捕收剂,采用1次粗选6次精选,中矿顺序返回的闭路浮选流程,可在矿浆温度为5℃时获得CaF2品位98.57%、回收率为75.02%的FC-98级别的萤石精矿,为该矿在低温下的浮选提供了技术参考。吸附量测试表明,在5~30℃间,PSK-13在萤石表面的吸附量变化不大,且均大于油酸钠的吸附量,因此具有良好的低温捕收性能。

For quartz-type fluorite ore with CaF2 content of 47.48%and SiO2 content of 39.70%,it is difficult to obtain a good selection index using a conventional fluorite flotation collector of sodium oleate in a low-temperature pulp environment.In order to improve the flotation effect of the fluorite ore at low temperature,flotation experiments were conducted using sodium petroleum sulfonate collector(PSK-13)with good low-temperature resistance.The results showed that the CaF2 grade of 98.57%and the FC-98 fluorite concentrate recovery of 75.02%could be obtained by the process of“closed flotation circuit of one roughing,six cleaning and middling returned cyclically”with the regulator of sodium carbonate,the depressant of water glass and the collector of PSK-13 when the pulp temperature is 5℃,which provided a technical reference for the low-temperature flotation.The results of the adsorption amount experiment showed that the adsorption amount of PSK-13 fluorite on the surface changed little and is greater than the adsorption amount of sodium oleate from 5℃to 30℃,showing the good performance of low-temperature collection.