Method for preparing gypsum powder by microwave activation

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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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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creator LI GUOMING
TONG JUN
WEI HUA
LIAO XUEFEI
CHEN BILIN
description 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.
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subjects ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
LIME, MAGNESIA
METALLURGY
REFRACTORIES
SLAG
TREATMENT OF NATURAL STONE
title Method for preparing gypsum powder by microwave activation
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