云南某磷酸工业副产石膏提纯试验研究

针对云南某大型磷化工湿法磷酸副产石膏,研究了磷石膏的浮选提纯工艺技术。研究表明,在矿浆pH=1.3,捕收剂YP8-2用量为0.3kg/t时,通过全粒级“一粗二精一扫”正浮选闭路工艺流程,可以获得CaSO4.2H2O含量为97.63%,回收率为94.72%的选矿指标;通过分级“一粗一精一扫”的正浮选闭路工艺流程,可以获得CaSO4.2H2O含量为98.92%,回收率为98.19%的选矿指标。该磷酸工业副产石膏提纯试验研究结果,为磷石膏资源的高值化利用提供预处理技术。

Experimental study on purification of gypsum, a by-product of phosphoric acid industry in Yunnan

The flotation purification technology of phosphogypsum was studied in view of the by-product of wet phosphoric acid in a large phosphorus chemical industry in Yunnan. The research shows that when the pulp pH is 1.3 and the dosage of collector YP8-2 is 0.3kg/t, the mineral processing index of 97.63% CaSO4.2H2O content and 94.72% recovery can be obtained through the full-size "one coarse, two fine and one sweep" direct flotation closed circuit process; Through the direct flotation closed circuit process flow of "one coarse, one fine and one sweep", the beneficiation index with the content of CaSO4.2H2O of 98.92% and the recovery of 98.19% can be obtained. The results of the purification test of gypsum, a by-product of phosphoric acid industry, provide pretreatment technology for the high value utilization of phosphogypsum resources.