Process for producing high-strength alpha-gypsum from chemical gypsum by adopting dry method

A chemical gypsum and gypsum technology, which is applied in the technical field of chemical gypsum dry production of high-strength alpha gypsum, can solve problems such as unstable product performance.
CN103288370AInactive Publication Date: 2013-09-11平邑开元新型建材有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
平邑开元新型建材有限公司
Publication Date
2013-09-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a process for producing high-strength alpha-gypsum from chemical gypsum by adopting a dry method. The process comprises the following specific steps of: placing a chemical gypsum as a raw material in a mixing machine, and spraying a mixed aqueous solution of a crystal modifier of sulfonate and maleic anhydride on the surface of the chemical gypsum raw material while mixing and stirring; uniformly mixing the mixed aqueous solution with gypsum during the stirring of the mixing machine; filling the uniformly-mixed gypsum material in a die; pressing the gypsum material on a pressure forming machine, and then steam-curing the gypsum material in a steam-curing kettle; drying the steam-cured gypsum block via a forced-air drying furnace, and then crushing; and grading to obtain the qualified alpha-gypsum product. The process for producing the alpha-gypsum product is low in water consumption and energy consumption in a production process, simple, few in production investment equipment, stable in the performance of producing the alpha-gypsum product, and low in cost.
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Description

technical field

[0001] The invention relates to a production technology and production process for producing high-strength α-gypsum by chemical gypsum dry method. Background technique

[0002] Natural or industrial gypsum, in the presence of a crystal modifier, undergoes crystal changes under a certain pressure and temperature, and dehydrates to produce α-hemihydrate gypsum containing 1 / 2 crystal water molecules.

[0003] Chemical gypsum or industrial gypsum, the main component is CaSO 4 It is a by-product or waste slag of chemical enterprises. It was piled up in special waste yards by enterprises before, and now it is gradually being used to produce industrial α-gypsum and β-gypsum after chemical treatment.

[0004] There are two kinds of domestic α-gypsum high-strength gypsum powder production processes, one is block autoclaving and steam curing, and the other is liquid phase production.

[0005] Mass autoclaving is to send the crystal conversion agent solution with...

Claims

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