化工进展2016，Vol.35Issue(12)：3954-3963,10.DOI:10.16085/j.issn.1000-6613.2016.12.031
氯化钙助剂分解钾长石制备氯化钾研究评述
Preparation of potassium chloride from K-feldspar with calcium chloride as additive agent:a review
摘要
Abstract
The research history and current situations of preparation of potassium chloride from K-feldspar with calcium chloride as additive agent is reviewed in this paper. Utilizing the K-feldspar derived from Baoxing county of Sichuan province as raw material,we evaluated and compared two processes of high temperature activation K-feldspar to fix carbon and hydrothermal alkaline decomposition K-feldspar from the perspectives of reaction principle,resource consumption,energy consumption,environmental compatibility and products. The results showed that both processes are feasible in principle,but the resource consumption,energy consumption and CO2 emission by calcination K-feldspar for carbon fixation process is 1.59 times,2.45 times and 4.10 times of those by hydrothermal alkaline method,respectively. The calcination K-feldspar for carbon fixation process produces KCl products as well as a large amount of hydrochloric acid and solid waste,while the hydrothermal alkaline method could completely transform the K2O,Al2O3 and SiO2 in K-feldspar of the ores into valuable products and thus maximize the utilization of K-feldspar resources,and minimize the consumption of relevant mineral resources. What’s more,the calcination K-feldspar for carbon fixation process has low efficiency of carbon fixation,and the fixed carbon is even less than that discharged due to the energy consumption for fix carbon. Therefore,the calcination K-feldspar forcarbon fixation process is still far from the practical engineering application.关键词
氯化钙/钾长石/氯化钾/高温固碳法/水热碱法Key words
calcium chloride/K-feldspar/potassium chloride/calcination K-feldspar for carbon fixation process/hydrothermal alkaline method分类
化学化工引用本文复制引用
陈建,马鸿文,张盼,刘梅堂..氯化钙助剂分解钾长石制备氯化钾研究评述[J].化工进展,2016,35(12):3954-3963,10.基金项目
中央高校基本科研业务费项目（2652015365）。 （）
