提高辽宁某钨选厂钨精矿品位试验

Experimental Study on Improving the Grade of Tungsten Concentrate from a Tungsten Plant in Liaoning

辽宁某钨选厂矿石中WO3的品位为0.79%,在黑钨矿中的分布率为78.48%。现场采用单一重选工艺,仅能获得WO3品位22%~23%、回收率88%~89%的重选精矿。为提高精矿指标,对重选精矿进行了磁选—浮选—浸出试验。结果表明：重选精矿在磁场强度为80 k A/m条件下磁选除铁,可获得WO3品位为23.54%的磁选精矿;磁选精矿以丁基黄药为捕收剂进行反浮选,获得WO3品位为53.08%的反浮选精矿;反浮选精矿以盐酸为浸出剂进行浸出除杂,可获得WO3品位为65.11%、作业回收率为96.71%、对原矿回收率为82.42%的精矿,实现了该钨矿资源的有效回收。

There is 0. 79% WO3 in a tungsten ore in Liaoning Province. Distribution rate of tungsten in wolframite is78. 48%. Gravity separation operation was used by on-sits process,and gravity concentrate index with WO3 grade of only 22%~ 23% and recovery of 88% ~ 89% is obtained. To improving the concentrate index,magnetic separation-flotation-leaching experiments on the gravity concentrate was conducted. Results show that magnetic concentrate with WO3 grade of 23. 54% is obtained via magnetic separation for iron removal at field intensity of 80 k A / m on the gravity concentrate,reverse flotation concentrate with WO3 grade of 53. 08% is gained through reverse flotation on the magnetic concentrate using butyl xanthate as collector,concentrate with WO3 grade of 65. 11%,yield recovery rate of 96. 71% and total recovery rate of 82. 42% is obtained by purification via leaching with hydrochloric acid as leaching agent. The effective recovery of the tungsten resource is obtained.