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国立矿物化学原料科学研究所在40年代末开始研究卡拉套磷块岩矿石的重悬浮液选矿。近来,由于对原料质量要求的提高和转入地下开采后矿石贫化率增加,因而要求使用经济有效的重悬液选矿方法。该方法可提供适宜酸加工的优质原料(P_2O_5含量不小于28％);由于其热强度高,也适宜于电炉制磷;另外,还可回收利用页岩及平衡表外矿石。
National Institute of Science and Technology of mineral raw materials in the late 40s began to study Karatta phosphate rock ore suspension re-dressing. Recently, the need for cost-effective reinterposition methods has been demanded because of the increased quality requirements for raw materials and the increased depletion rate of ore after conversion to underground mining. The method can provide high-quality raw materials suitable for acid processing (the content of P2O5 is not less than 28%); because of its high heat intensity, it is also suitable for making phosphorus by electric furnace; in addition, shale and balance sheet ore can be recovered and used.