热溶冷结晶法制取硫酸钾镁肥的实验研究

采用西台吉乃尔盐湖卤水利用大盐田生产日晒得到的钾、硫混盐矿作为原料，通过热溶冷结晶工艺制取无药剂污染的硫酸钾镁肥。结果表明：热溶冷结晶法制取硫酸钾镁肥工艺可行，原矿硫钾质量比和原矿粒度、热溶过程中热溶温度和时间、冷结晶过程冷却时间和温度等因素是影响系统钾收率的主要条件，并通过不同原矿粒度、热溶溶剂及不同混合比例、转化液加入量、热溶温度、时间及冷结晶时间、温度等单因素实验得到最佳实验条件。

Study on preparation of potassium-magnesium sulfate fertilizer with thermally dissolved cold crystallization method

Potassium-magnesium sulfate fertilizer without pharmaceutical pollution was prepared by thermally dissolved cold crystallization technology with potassium-sulfate mixed salt mine from solar evaporation of sulfate-type West Taijinar salt lake brine as raw material. Results showed that the preparation technology of potassium-magnesium sulfate fertilizer with thermally dissolved cold crystallization method was feasible.The mass ratio of potassium to sulfate and granularity of the mine，thermally dissolved temperature and time，and cooling temperature and time were the main conditions affecting potassium yield.Optimum technological conditions of the preparation of potassium-magnesium sulfate fertilizer were obtained by single-factor experiments，such as different granularities，different thermally dissolved solvents and mixture ratios，reaction liquid quantities， and thermally dissolved temperatures and times etc..