Building gypsum based on industrial solid waste desulfurized gypsum as raw material and preparation method thereof

A technology for desulfurized gypsum and industrial solid waste, applied in the field of building materials, can solve the problems of large surface area and particle distribution, high water content of desulfurized gypsum, and large volumetric weight of gypsum products, and achieve uniform dehydration, good heat preservation effect, and increased water retention and adhesive properties

Inactive Publication Date: 2020-10-13
YANGZHOU POLYTECHNIC INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Desulfurization gypsum is based on the industrial solid waste generated after desulfurization in power plants. Although its chemical composition is similar to natural gypsum, the desulfurization gypsum obtained from power plants is different according to the production process. The crystallization size and particle distribution of desulfurization gypsum are uniform. Different, the crystallized particles of desulfurized gypsum obtained from the power plant are relatively small, which belongs to the registered one with poor gradation, and the desulfurized gypsum produced

Method used

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  • Building gypsum based on industrial solid waste desulfurized gypsum as raw material and preparation method thereof
  • Building gypsum based on industrial solid waste desulfurized gypsum as raw material and preparation method thereof
  • Building gypsum based on industrial solid waste desulfurized gypsum as raw material and preparation method thereof

Examples

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Example Embodiment

[0029]

[0030] A construction gypsum based on industrial solid waste desulfurized gypsum as a raw material, including the following raw materials by weight:

[0031] 120 parts of desulfurized gypsum, 30 parts of microporous ceramics, 40 parts of vitrified beads, 20 parts of expanded perlite, 5 parts of coconut shell powder, 3 parts of cement, 1 part of methyl cellulose, 0.3 parts of retarder, hydroxymethyl Base cellulose 0.2 part, polypropylene fiber 0.2 part, composite early strength agent 0.2 part; wherein, the retarder is dextrin; the composite early strength agent is anhydrous sodium sulfate, ferrous ammonium sulfate and triethanolamine according to The weight ratio is 10:6:1 to be mixed;

[0032] The method for preparing construction gypsum based on industrial solid waste desulfurized gypsum as a raw material includes the following steps:

[0033] S1, pretreatment, desulfurization gypsum is subjected to water removal pretreatment, and the moisture content of the obtained desul...

Example Embodiment

[0036]

[0037] A construction gypsum based on industrial solid waste desulfurized gypsum as a raw material, including the following raw materials by weight:

[0038] 140 parts of desulfurized gypsum, 35 parts of microporous ceramics, 55 parts of vitrified beads, 24 parts of expanded perlite, 6 parts of coconut shell powder, 7 parts of cement, 2 parts of methyl cellulose, 0.32 parts of retarder, hydroxymethyl 0.3 part of base cellulose, 0.3 part of polypropylene fiber, 0.3 part of composite early strength agent; the retarder is SG-12 (Suzhou Xingbang Chemical Building Materials Co., Ltd.); the composite early strength agent is anhydrous sodium sulfate , Alum and triethanolamine are mixed according to the weight ratio of 10:4:1;

[0039] The method for preparing construction gypsum based on industrial solid waste desulfurized gypsum as a raw material includes the following steps:

[0040] S1, pretreatment, desulfurization gypsum is subjected to water removal pretreatment, and the moi...

Example Embodiment

[0043]

[0044] A construction gypsum based on industrial solid waste desulfurized gypsum as a raw material, including the following raw materials by weight:

[0045] 160 parts of desulfurized gypsum, 45 parts of microporous ceramics, 60 parts of vitrified beads, 35 parts of expanded perlite, 8 parts of coconut shell powder, 8 parts of cement, 3 parts of methyl cellulose, 0.35 parts of retarder, hydroxymethyl 0.4 part of base cellulose, 0.4 part of polypropylene fiber, 0.5 part of composite early strength agent; the retarder is SG-12 (Suzhou Xingbang Chemical Building Materials Co., Ltd.); the composite early strength agent is anhydrous sodium sulfate , Alum and triethanolamine are mixed according to the weight ratio of 10:4:1;

[0046] A preparation method of construction gypsum based on industrial solid waste desulfurized gypsum as a raw material, including the following steps:

[0047] S1, pretreatment, desulfurization gypsum is subjected to water removal pretreatment, and the mo...

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Abstract

The invention discloses building gypsum based on industrial solid waste desulfurized gypsum as a raw material and a preparation method thereof. The building gypsum based on industrial solid waste desulfurized gypsum as a raw material comprises the following raw materials in parts by weight: 120-160 parts of desulfurized gypsum, 30-45 parts of microporous ceramic, 40-60 parts of vitrified micro bubbles, 20-35 parts of expanded perlite, 5-8 parts of coconut shell powder, 3-8 parts of cement, 1-3 parts of sodium carboxymethyl cellulose, 0.3-0.35 parts of a retarder, 0.2-0.4 parts of hydroxymethylcellulose, 0.2-0.4 parts of polypropylene fiber and 0.2-0.5 parts of a composite early strength agent. The raw materials are environment-friendly material, desulfurized lime, microporous ceramic, sodium carboxymethyl cellulose, coconut shell powder and the like are compounded for use, the obtained building gypsum is proper in viscosity, high in grain size gradation and good in water-retaining property and has an energy storage function, the problem that an obtained building gypsum product is easy to fall off after use due to high content of water in desulfurized gypsum in subsequent utilization and treatment is solved, and the building gypsum has a wide market prospect.

Description

technical field [0001] The invention relates to the technical field of building materials. More specifically, the present invention relates to a construction gypsum based on industrial solid waste desulfurized gypsum as a raw material and a preparation method thereof. Background technique [0002] Desulfurization gypsum is based on the industrial solid waste produced after desulfurization in power plants. Although its chemical composition is similar to natural gypsum, the desulfurization gypsum obtained from power plants differs according to the production process. The crystallization size and particle distribution of desulfurization gypsum are uniform. Different, the crystallized particles of desulfurized gypsum obtained from the power plant are relatively small, which belongs to the registered one with poor gradation, and the desulfurized gypsum produced by the power plant has a high water content, generally above 10%, and it is easy to form loose clusters when pressure is...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B38/08C04B24/12C04B11/26C04B11/028C04B103/12C04B111/28C04B111/40
CPCC04B11/028C04B11/264C04B28/144C04B40/0039C04B2103/12C04B2111/28C04B2111/40C04B14/24C04B20/004C04B14/185C04B18/248C04B7/00C04B24/383C04B2103/22C04B16/0633C04B22/147C04B22/148C04B24/122
Inventor 谢伟
Owner YANGZHOU POLYTECHNIC INST
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