低钠光卤石为原料制备氯化钾及含水率的影响研究  

Study on the Preparation of Potassium Chloride from Low-sodium Carnallite and the Effect of Moisture Content

作　　者：马生奎 王刚 董伟兵 切知加 杜景灵 MA Sheng-kui;WANG Gang;DONG Wei-bing;QIE Zhi-jia;DU Jing-ling(School of Chemistry and Chemical Engineering,Qinghai Nationalities University,Xining 810007,China;Key Laboratory of Resource Chemistry and Eco-environmental Protection in Tibetan Plateau(Qinghai Nationalities University),State Ethnic Affairs Commission,Xining 810007,China;School of Physics and Electronic Information Engineering,Qinghai Nationalities University,Xining 810007,China)

机构地区：[1]青海民族大学化学化工学院,青海西宁810007 [2]国家民委青藏高原资源化学与生态环境保护重点实验室,青海西宁810007 [3]青海民族大学物理与电子信息工程学院,青海西宁810007

出　　处：《盐科学与化工》2021年第12期14-17,共4页Journal of Salt Science and Chemical Industry

基　　金：青海省重点研发与转化计划-科技合作专项(2018-HZ-818);青海民族大学自然科学基金(2019XJZD01);青海民族大学科研创新团队专项经费资助。

摘　　要：钾肥厂生产的氯化钾粒度小、含湿量大耗能较高、易板结、因此研究制备不同形貌和不同粒度范围的氯化钾,有利于钾肥的运输、储存,降低干燥成本,提高钾肥利用率。为解决钾肥生产中面临的诸多问题,采用低钠光卤石和水为原料制备氯化钾,氯化钾制备过程中以含湿率为单项指标,并对其含水量进行研究。文章首先通过单因素实验确定氯化钾不同形貌、氯化钾不同颗粒大小以及杂质离子对氯化钾含湿量的影响。结果表明:呈八面体形状的氯化钾含湿量最低,且粒度越大含湿量越低,Mg^(2+)含量对氯化钾含湿量影响较大,Mg^(2+)添加浓度为2.0 g/mol时氯化钾含湿率高达0.666%,生产过程中应该控制Mg^(2+)含量,可以解决工业氯化钾易板结的问题。The potassium chloride produced by potash fertilizer plant has the advantages of small particle size,high moisture content,high energy consumption and easy hardening,so the preparation of potassium chloride with different morphology and particle size range is beneficial to the transportation and storage of potash fertilizer,reduce the drying cost and improve the utilization rate of potash fertilizer.In order to solve many problems in potash fertilizer production,low-sodium carnallite and water were used as raw materials to prepare potassium chloride.Moisture content was used as a single index in the preparation process,and its water content was studied.In this article,the effects of different morphologies,particle sizes and impurity ions on the moisture content of potassium chloride were determined by single factor experiments.The results showed that the moisture content of potassium chloride in octahedral shape is the lowest,the larger the particle size is,the lower the moisture content is,and the content of Mg^(2+) has a great influence on the moisture content of potassium chloride.The content of Mg^(2+) should be controlled in the production process,which can solve the problem that industrial potassium chloride is easy to harden.

关 键 词：氯化钾 形貌 粒度 含湿率 

分 类 号：TQ131.1[化学工程—无机化工]