利用白云石和钾长石制备钾钙肥的研究  

Study on preparation of potassium-calcium fertilizer from dolomite and potash feldspar

作　　者：刘阳 张西兴 庞世花 

机构地区：[1]金正大生态工程股份集团有限公司国家缓控释肥工程技术研究中心,山东临沭276700

出　　处：《磷肥与复肥》2015年第11期9-10,12,共3页Phosphate & Compound Fertilizer

摘　　要：开发利用不溶性含钾岩石生产钾钙肥是解决我国钾肥短缺的一个重要途径。介绍了以钾长石和白云石为原料经煅烧制备钾钙肥的原理,研究了钾长石与白云石的质量比、煅烧温度、煅烧时间对钾钙肥中有效K_2O含量的影响。结果表明,最佳的工艺条件为钾长石与白云石质量比1︰1、煅烧温度1 150℃、煅烧时间40 min,在此条件下制备的钾钙肥有效成分含量符合Q/XYF 001—2005的要求,K_2O转化率达到94%,Mg O转化率达到98%,实现了钾长石与低品质白云石的综合利用。Production of potassium-calcium fertilizer from insoluble potash feldspar is an important way to solve the shortage of potassium fertilizer in China. The production principle of potassium-calcium fertilizer from dolomite and potash feldspar is introduced, the influences of mass ratio of potash feldspar to dolomite, calcining temperature and calcining time on effective K2O content in potasslum-calcium fertilizer are studied. The results show： the optimum process conditions are mass ratio of potash feldspar to dolomite of 1 ： 1, calcining temperature of 1 150 ℃, calcining time of 40 min, effective constituent content in potassium-calcium fertilizer prepared in the optimum process conditions meets requirement of Q/XYF 001-2005, conversion rate of K2O is 94%, conversion rate of MgO is 98%, comprehensive utilization of potash feldspar and low quality dolomite is realized.

关 键 词：钾钙肥 钾长石 白云石 煅烧 工艺条件 

分 类 号：TQ443[化学工程—化学肥料工业]