钾长石热分解生成硫酸钾的实验研究  

Experimental Study of Thermal Decomposition of Potash Feldspar to from Potassium Sulfate

作　　者：邱龙会 金作美[2] 王励生[2] 

机构地区：[1]核物理与化学研究所,绵阳621900 [2]四川大学应用化学系,成都610065

出　　处：《化肥工业》2000年第3期19-21,共3页Chemical Fertilizer Industry

基　　金：国家自然科学基金资助项目!(批准号:29777018)部分内容

摘　　要：实验研究了钾长石 -石膏 -碳酸钙体系热分解生成硫酸钾的工艺条件 ,考察了焙烧温度、停留时间和物料配比对钾分解率的影响 ,并筛选出添加剂Ⅰ和Ⅱ以降低焙烧温度。当加入添加剂Ⅰ 0 .9%或加入添加剂Ⅱ 0 .85 %～ 2 .5 1%时 ,能使适宜焙烧温度分别由 10 5 0℃降至 95 0℃和 90 0～ 95 0℃ ,钾分解率均大于 90 % ,而且添加剂对不同钾长石试样均具有良好的适应性 。An experimental study is made of the process conditionsfor the thermal decomposition of the system potash feldspar- gypsum- calci -um carbonate to form potassium sulfate, the effect is examined of theroasting temperature, residence time and material proportion on potassiumdecomposition, an Additives Ⅰ and Ⅱ are selected to lower the roastingtemperature. When 0.9% of Additive Ⅰ or 0. 85% - 2.51% of Ⅱ isadded, the suitable roasting temperature is lowered from 1050 ℃ to 950℃ and 900-950℃, respectively, the potassium decomposition is over90%, tea additives are well adapted to different potash feldspar samples,and microcrystals of potassium sulfate are proved to be formed by thermaldecomposition.

关 键 词：钾长石 热分解 硫酸钾 助剂 钾肥 

分 类 号：TQ443.2[化学工程—化学肥料工业]