柴达木低品位固体钾矿溶解转化率与品位关系

Relationship of Conversion Rate with Solid Potash Content for Qaidam Low-grade Solid Potash

我国是缺钾大国,探明的可溶性钾盐十分有限,柴达木盆地是我国盐湖钾盐的聚集地,含水层骨架中含有数亿吨低品位固体钾矿,开发出这些低品位固体钾盐对增加国内钾肥供给,保障粮食安全具有重大意义。青海盐湖工业股份有限公司历经十年开发出低品位固体钾盐的浸泡式溶解转化方法,试验表明,固体钾盐的溶解转化率随固体钾品位的增加而增加,累计溶解转化率为56%~98%。该技术在柴达木多个盐湖得到推广应用,察尔汗盐湖保有固体钾盐达2.96×10^8 t,平均品位KCl为1.24%,根据试验数据回归分析溶解转化率77%,可溶解转化出钾盐(KCl)约2.28×10^8 t,柴达木盆地盐湖保有3.43×10^8 t固体钾盐,平均品位KCl为1.25%,溶解转化率78%,可溶解转化出钾盐(KCl)2.68×10^8 t,大幅度增加了钾盐储备量。

China is a large potassium-deficient country,and the proven soluble potassium salt are very limited.The Qaidam Basin is a gathering place of Salt Lake potassium salt in China.The aquifer skeleton contains hundreds of millions of tons of low-grade solid potassium mines.Developing these low-grade solid potassium salt is of great significance to increase the supply of domestic potassium fertilizer and ensure food security.For this reason,Qinghai Salt Lake Industry Co.,Ltd.has developed the immersion dissolution and transformation method of low-grade solid potassium salt over ten years.The test shows that the dissolution and transformation rate of solid potassium salt increases with the increase of solid potassium grade,and the cumulative dissolution and transformation rate is 56%~98%.This technology has been popularized and applied in many Salt Lakes in Qaidam,and the retention of solid potassium salt in Qarhan Salt Lake reaches 2.96×10^8 t.The average grade of KCl is 1.24%.According to the regression analysis of test data,the dissolution conversion rate is 77%.The soluble converted potassium salt(KCl)is about 2.28×10^8 t.The Qaidam Basin Salt Lake has 3.43×10^8 t solid potassium salt,the average grade of KCl is 1.25%,the dissolution conversion rate is 78%.The soluble converted potassium salt(KCl)is 2.68×10^8 t,which greatly increases the potassium salt reserves.