研究了捕收剂H2⁃Z浮选石膏和石英的工艺条件。纯矿物研究表明：在pH＝3～10范围内时，两种矿物的分选性差异很小，均表现很大的可浮性，在pH＝1．5～2．5条件下浮选效果较佳，能实现石膏和石英的分离。实际矿物浮选表明：通过一粗一精一扫的选矿工艺流程可获得SiO2含量仅有1．63％的精制磷石膏，石膏品位为97．12％，回收率达93．50％，为高硅磷石膏综合利用提供了良好的技术条件。%Processing parameters for flotation of gypsum and quartz with H2⁃Z as the collector were studied. When used to treat pure minerals, H2⁃Z showed little selectivity and a quite good floatablity at pulp pH ranging from 3 to 10, and a better flotation performance was obtained at pH of 1. 5 to 2. 5, achieving separation between gypsum and quartz. The actual ore flotation test flowsheet consisting of one roughing, one cleaning and one scavenging resulted in a purified phosphogypsum with gypsum grade of 97. 12% at recovery of 93. 50% and the SiO2 content therein of only 1. 63%. Therefore , this process can provide a good technical model for comprehensive utilization of high⁃silicon phosphogypsums.
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