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PROCESSING EQUIPMENT AND METHOD FOR A PULVERULENT CALCIUM SULPHATE MATERIAL AND NOVEL HYDRAULIC BINDER BASED ON CALCIUM SULPHATE MATERIAL
PROCESSING EQUIPMENT AND METHOD FOR A PULVERULENT CALCIUM SULPHATE MATERIAL AND NOVEL HYDRAULIC BINDER BASED ON CALCIUM SULPHATE MATERIAL
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机译:基于硫酸钙材料的粉状硫酸钙材料和新型水硬性粘结剂的加工设备及方法
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摘要
A method for processing a pulverulent calcium sulphate material in order to obtain a hydraulic binder is described, including combining the following two successive processing steps: (a) heating the pulverulent material in a curing tunnel (1) at a temperature of 220-360° C., under conditions suitable for primarily forming an alpha-type calcium sulphate, and (b) subjecting the heated material to a thermal quenching step in a cooling apparatus (2), with a cold, dry gas to stabilise the alpha anhydrite and to prevent its conversion into other crystallographic types. The method provides a novel hydraulic binder with an alpha anhydrite content of more than 35 wt. %, and with improved strength and behavior in fire resistance properties.
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