在正浮选氯化钾的过程中，富含氯化钾的精钾母液大都被回用于调浆或冷分解环节，存在钾组分回收利用效率较低的问题。利用精钾母液配比适量水氯镁石，通过反应结晶方法来制备光卤石、钾石盐等原矿，并返回到浮选环节以提取其中的钾组分。试验结果表明，该方法能有效回收母液中的钾资源，制得的钾矿品位在14%~22%之间，氯化钾回收率为80%~95%，并得出制备原矿的最佳工艺条件：精钾母液与水氯镁石质量比为1：2，搅拌时间为30 min，搅拌速度为1 600 r/min，结晶时间为15 min，结晶温度为15℃。通过精钾母液的反应结晶，除能够向浮选生产线供应优质原矿之外，还能缓解母液排放引起的钾资源流失。

In the positive flotation process of potassium chloride,the mother liquor with rich potassium chloride is mostly used for pulp or cold decomposition,which brings about problems such as low recycling efficiency of potassium component.In this study,the potassium containing mother liquor reacts with appropriate amount of bischofite to make carnallite,potassium stone salt and other ores via the reaction crystallization method.The prepared ores return back to the flotation section for the extraction of potassium component.The experimental results show that this method can effectively recover potassium resources from the mother liquor,the potassium content in the prepared ores is between 14% and 22%,and the recovery rate of potassium chloride can reach 80%-95%.The optimum process conditions for preparation of ores are as follows:the weight ratio between the mother liquor and bischofite is 1:2,the stirring time is 30 min,the stirring speed is 1 600 r·min^-1,the crystallization time is 15 min,and the crystallization temperature is at 15℃.High-quality ores prepared by reaction and crystallization of mother liquor can be supplied to the flotation section,and can also reduce the loss of potassium resources with discharge of mother liquor.

边红利(1974-),女,本科,工程师,研究方向为盐湖化工,lipingb521@126.com。