Process and device for preparing gypsum whisker by semi-dry desulfurized fly ash and waste acid

A semi-dry desulfurization and gypsum whisker technology, applied in the direction of single crystal growth, crystal growth, single crystal growth, etc., can solve the problems of difficult dehydration, small particle size of gypsum, etc., and achieve easy acquisition, simple operation and low investment. Effect
CN102912445AInactive Publication Date: 2013-02-06ZHEJIANG TIANLAN ENVIRONMENTAL PROTECTION TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
ZHEJIANG TIANLAN ENVIRONMENTAL PROTECTION TECH
Publication Date
2013-02-06
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a process and a device for preparing gypsum whisker by semi-dry desulfurized fly ash and waste acid. The process includes firstly, mixing semi-dry desulfurized fly ash and water to obtain desulfurized fly ash size, and regulating pH value of the desulfurized fly ash size to 5-6 before oxidation by waste hydrochloric acid to obtain size containing calcium sulfate and calcium chloride; and secondly, performing hydrocyclone-separation to the size containing calcium sulfate and calcium chloride, performing size mixing to bottom-flow size subjected to hydrocyclone-separation to obtain reaction size, reacting the reaction size with waste sulfuric acid, and dewatering obtained product to obtain alpha-semihydrate gypsum whisker. The three industrial wastes of desulfurized fly ash, waste hydrochloric acid and waste sulfuric acid are organically used to prepare the alpha-semihydrate gypsum whisker while collecting HCl gas, and prepared gypsum whisker is high in purity and low in water content.
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Claims

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