Method for preparing gypsum powder by microwave activation

The invention provides a method for preparing gypsum powder by microwave activation, comprising: according to the weight percent, firstly mixing 70-90% of desulfurization gypsum, 5-20% of modifying agent and 5-20% of bleaching agent in non-saturated vapor medium at the temperature of 120-180 DEG C,...

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Bibliographische Detailangaben
Hauptverfasser:	LI GUOMING, TONG JUN, WEI HUA, LIAO XUEFEI, CHEN BILIN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ARTIFICIAL STONE CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE LIME, MAGNESIA METALLURGY REFRACTORIES SLAG TREATMENT OF NATURAL STONE
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Beschreibung
Zusammenfassung:	The invention provides a method for preparing gypsum powder by microwave activation, comprising: according to the weight percent, firstly mixing 70-90% of desulfurization gypsum, 5-20% of modifying agent and 5-20% of bleaching agent in non-saturated vapor medium at the temperature of 120-180 DEG C, and then sending into microwave equipment for microwave drying and dewatering; meanwhile, arranginga ball-milling body inside a work cavity of the microwave equipment, and carrying out powder grinding on the mixed material when in drying and dewatering to prepare gypsum powder material; finally, sending the gypsum powder material out of the microwave equipment to be cooled. The method can be used for treating desulfurization gypsum which is industrial waste for a second time for recycling, andsecondary pollution can not be caused.