钾长石-硫酸钙-碳酸钙体系提钾添加剂的实验研究  

Experimental Research on Additive in Extraction of K from Microcline-CaSO_4-CaCO_3 System

作　　者：柯亮[1] 石林[1] 陈定盛[2] 

机构地区：[1]华南理工大学环境科学与工程学院,广州510641 [2]国家环境保护总局华南环境科学研究所,广州510655

出　　处：《非金属矿》2007年第5期12-14,共3页Non-Metallic Mines

基　　金：2006年度国家星火计划项目"脱硫灰渣与钾长石掺合焙烧生产复合肥料的应用开发"(2006EA105016);广州市环保局项目"利用烟气脱硫灰与钾长石掺和焙烧生产含钾复合肥料关键技术的研发"(G01B2061750)部分内容

摘　　要：研究了不同温度下氯化钙、硫酸钠对钾长石-硫酸钙-碳酸钙体系[n(microcline)∶n(CaSO4)∶n(CaCO3)=1∶1∶14]钾熔出率的影响,并进一步研究了加入硫酸钠时的热分解反应动力学。结果表明:硫酸钠可有效地促进钾长石的热分解,当其添加量为2.91%时,反应温度可降为1050℃,表观活化能可降为87.71kJ/mol;在950℃、1050℃时,钾长石释钾主要机理是离子交换;在1150℃时,钾长石释钾机理主要是阴离子吸附。The microcline-CaSO4-CaCO3 [n(microcline) ∶n(CaSO4) ∶n(CaCO3) =1∶1∶14] system was used to produce K2SO4,the effects of reaction temperatures,additive concentration of CaCl2,Na2SO4 were studied. The kinetics of the system with Na2SO4 were also been investigated. The results suggested that Na2SO4 can effectively promote the thermal decomposition of potash feldspar,and the reaction temperature can reduce to 1050℃ from 1150℃,the apparent activation energy can reduce to 87.71kJ/mol;the main mechanism of extracti...

关 键 词：钾长石 添加剂 热分解 熔出率 

分 类 号：TF826.1[冶金工程—有色金属冶金]