硫酸盐型钾盐浮选尾矿的矿质分析及浸取实验研究

Study on the Leaching of Sulfate-type Potash Flotation Tailing 

中文关键词:  硫酸盐型  低品位钾  尾矿  浸取

英文关键词:Magnesium sulfate brine  Low grade potassium  Tailing  Leaching

中文摘要:

      针对青海大浪滩盐湖地区钾盐浮选尾矿,研究了尾矿中钾盐的赋存形式,并探索了以稀释老卤为溶剂浸取尾矿中钾的优化条件。结果表明,钾主要以钾石盐矿的形式存在于尾矿中,该矿样属于典型的硫酸镁亚型矿质。同时,考察了不同稀释倍数的老卤的物理性质变化,得到了室温条件下该钾盐浮选尾矿最适宜的浸取条件,老卤/淡水的比例为1∶4,固/液比为3∶2,搅拌反应1 h。在优化条件下,得到了钾离子含量为3.93%的富钾卤水,此时K⁺浸取率达到86.9%,该卤水进一步蒸发结晶可得到软钾镁矾。本研究为低品位硫酸盐型钾矿的综合开发利用提供了数据支持和参考。

英文摘要:

      :In this paper, the anthors reported that the occurrence form of sulfate-type potash flotation tailing in Qinghai Dalangtan salt lake region and explored the optimal leaching condition of potash flotation tailing by dilute bittern for solvent. The results showed that the sylvinite mine is potassium mainly existence form in tailings, belongs to the typical magnesium sulfate subtype mineral. Meanwhile, the physical properties of different diluted multiples bittern were investigated and the optimum leaching conditions of potash flotation tailings at room temperature were obtained. When the old brine/water ratio of 1∶4, solid/liquid ratio of 3∶2, mixing stirring reaction time 1 h, the potassium ion content of the rich potassium brine is 3.93%, and the leaching rate is 86.9%. By further evaporation crystallization the rich potassium brine, the picromerite products could be gained. This study can provide a theoretical and technical references based on comprehensive exploitation and utilization of low grade potassium sulfate-type mine.