氯化钾生产中分解工序对钾收率的影响研究  

Influence of decomposing procedure on potassium yield in potassium chloride production

作　　者：刁祥瑞[1,2] 朱翠琴[1] 朱金义 王石军 程芳琴[1] 

机构地区：[1]山西大学,山西太原030006 [2]青海盐湖工业集团有限公司

出　　处：《无机盐工业》2008年第10期31-35,共5页Inorganic Chemicals Industry

基　　金：国家科技支撑计划项目(2006BAB09B02)

摘　　要：正浮选法生产氯化钾其钾离子收率低,主要影响因素为分解工序的原矿类型、加水量和温度等。以实际生产为基础,以分解工序为对象,研究影响产品质量、钾收率的各因素,并针对不同的原矿做尾液回用实验。结果表明:当分解完成母液点相同时,原矿的钠钾比越大,产品质量越低,二者呈对数关系;原矿的镁钾比越大,钾收率越低,二者呈线性关系;钾收率随分解工序加水量增大而降低,原矿的镁钾比越大,钾收率随加水量增大而降低的幅度就越大;尾液回用时,因原矿的氯化镁与(氯化钾+氯化钠)的质量比不同,要使原矿在15 m in内完全分解,需控制不同的母液点;当加水量相同时,原矿的镁钾比越大,随温度升高钾收率降低的幅度就越大。Potassium ion yield which is strongly affected by factors including the raw ore type, water amount, and temperature in the decomposing procedure, is low in the production of potassium chloride with positive flotation technique. On the basis of practical production, with the decomposing procedure as objective, the factors affecting the quality of decomposing products and yield were investigated, and high concentration brine for different raw ores was reused. The results showed：when component of decomposed mother liquid is certain,the larger the ratio of sodium chloride to potassium chloride in raw ore is, the lower the product quality is, the logarithmic relation between them is proposed and the larger the ratio of magnesium chloride to potassium chloride is,the lower the yield is,the relation between them is linear;the yield of K decreases along with the water amount increasing in decomposing procedure ; the larger the ratio of magnesium chloride to potassium chloride is, the quicker the yield decreases along with water amount increasing for different raw ores;when high concentration brine was reused, the component of decomposed mother liquid should be controlled differently for different raw ores because they have different ratios of magnesium chloride to potassium chloride and sodium chloride in the case of decomposing completely within 15 min ;when water amount is certain,the larger the ratio of magnesium chloride to potassium chloride is, the quicker the yield decreases along with temperature rising for different raw ores.

关 键 词：氯化钾 钾回收率 分解工序 

分 类 号：TQ131.13[化学工程—无机化工]