摘要
综述了国内外钾长石-石膏-碳酸钙体系高温烧结法制取硫酸钾的研究历程与现状。从一次性资源消耗、能源消耗、环境相容性和产品方案等方面对该法与钾长石水热碱法制取硫酸钾两种工艺路线进行对比分析,结果表明,高温烧结法的一次性资源消耗量、能源消耗量和CO2排放量分别为水热碱法的2.08倍、3.29倍和3.67倍;高温烧结法除产品硫酸钾外,硅酸盐水泥产量大,而水热碱法的产品结构均为高附加值产品。因此,钾长石水热碱法制取硫酸钾技术具有更好的工业化应用前景。
The research history and current situations at home and abroad for the preparation of potassium sulfate from K-feldspar in the system of KAlSi3O8-CaSO4-CaCO3 by the calcination process is reviewed.One-time mineral resource consumption,energy consumption,environmental compatibility and product program for the procedures of preparation of potassium sulfate were analyzed by comparison.The results show that one-time mineral resource consumption,energy consumption and CO2 emission by the calcination process is 2.08 times,3.29 times and 3.67 times respectively by hydrothermal alkaline process.The calcination process produces K2SO4 products in addition of a large amount of silicate cement.However,the products produced d by hydrothermal alkaline process are of high value.Therefore,the technology for preparation of potassium sulfate from K-feldspar by the hydrothermal alkaline process has a better commercialization prospect.
出处
《化工矿物与加工》
CAS
北大核心
2015年第4期55-61,共7页
Industrial Minerals & Processing
基金
中国地质调查项目(12120113087700)
中央高校基本科研项目(2652014017)
关键词
钾长石
硫酸钾
高温烧结法
水热碱法
K-feldspar
potassium sulfate
calcination
hydrothermal alkaline process
