矿产综合利用Issue(5)：124-128,123,6.DOI:10.3969/j.issn.1000-6532.2017.05.028
磷石膏、钾长石与焦炭热反应试验及机理研究
Study on the Thermal Reaction Test and Mechanism of Phosphorus Gypsum, Potassium Feldspar and Coke
摘要
Abstract
Sulphur dioxide and silicon,calcium,potassium and magnesium fertilizers were produced synchronously by using phosphorus gypsum,potassium and coke under high-temperature calcination condition.The main factors such as ratio of phosphorus gypsum to potassium feldspar,the dosage of coke,calcination temperature and calcination time were studied through single-factor tests.With citrate-soluble potassium as the main examined index,the effect of various factors on the calcination reaction was analyzed.Under the optimal conditions the citrate-soluble potassium dissolution rate was 95 ％.The high-temperature calcination processes of the potassium feldspar-CaO system and the potassium feldspar-CaSO4 system were studied.The results show that potassium feldspar can react with CaO and CaSO4 separately.CaO can react with potassium feldspar completely and can replace the potassium in potassium feldspar,but some of the K2O escapes in the form of gas.The degree of reaction between CaSO4 and potassium feldspar is very low,but SO42-can fix the potassium decomposed from potassium feldspar.关键词
磷石膏/钾长石/高温焙烧/反应机理Key words
Phosphorus gypsum/Potassium feldspar/High-temperature calcination/Reaction mechanism分类
矿业与冶金引用本文复制引用
李兴平,刘阳,张西兴,胡兆平..磷石膏、钾长石与焦炭热反应试验及机理研究[J].矿产综合利用,2017,(5):124-128,123,6.基金项目
30万t/年磷石膏制酸联产土壤调理剂工程 资源节约和环境保护2015年中央预算内投资备选项目 黔发改投资[2015]933号 （）
