Preparation method of calcium sulfate hemihydrate whisker

The invention discloses a preparation method of calcium sulfate hemihydrate whiskers, and belongs to the technical field of solid waste resource conversion and utilization. The method comprises the following steps: mixing desulfurized gypsum with a crystal modifier aqueous solution, adding organic acid, and mixing and stirring; raising the temperature of the stirred product for reaction; and filtering, washing and drying the reaction product to obtain the calcium sulfate hemihydrate whisker. The organic mixed acid is added and the process conditions are adjusted, so that the step of adding inorganic acid is omitted, the preparation conditions are mild, the method is eco-friendly, the requirement on equipment is simple, and the production cost is low. 本发明公开了一种半水硫酸钙晶须的制备方法，属于固废资源转化利用技术领域。该方法包括：将脱硫石膏与媒晶剂水溶液混合，加入有机酸混合搅拌；将所述搅拌后的产物升温进行反应；将所述反应产物过滤，洗涤，干燥，得到所述半水硫酸钙晶须。本发明通过加入有机混酸和调节其工艺条件，从而省去了加入无机酸的步骤，制备条件温和，生态友好，对设备要求简单，生产成本低。