七水硫酸镁干燥脱水制取一水硫酸镁实验研究

一水硫酸镁是较七水硫酸镁含硫镁成分高、附加值大、市场前景广阔的重要化工原料及双元素肥料。苦土法生产的一水硫酸镁品质较低，不能满足市场要求。通过比较高温结晶法和干燥脱水法的工艺特点，以及所涉及的多种设备，在掌握相关资料及小试实验数据的基础上，采用盘式干燥机直接干燥七水硫酸镁的方式制取一水硫酸镁。实验结果表明，该种盘式干燥机在温度为160 ℃、搅拌转速为15 r/min情况下的干燥强度（以水计）为4.1 kg/(m²•h)。使用盘式干燥机可以较好地生产出满足品质要求的一水硫酸镁，使用该机单位产品能耗适中，单位产品净收益在合理范围内。

Study on preparation of magnesium sulfate monohydrate by dehydration of magnesium sulfate heptahydrate

Magnesium sulphate monohydrate is a very important chemical raw material and dual-element fertilizer with more magnesium and sulfur components,added value,and market prospect than magnesium sulphate heptahydrate.Magnesium sulphate monohydrate producted by Ku-Tu method cannot meet market requirements as the lower quality.By comparing process characteristics of high-temperature crystallization and drying dehydration,a variety of equipment,as well as relevant information and pilot test data,a disc dryer was ad...