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Gypsum and preparation method thereof

A technology of plastering gypsum and desulfurized gypsum powder, which is applied in the field of plastering gypsum, which can solve the problems of environmental pollution and waste of resources, and achieve the effects of protecting the environment, strong adhesion, and avoiding waste of resources

Inactive Publication Date: 2018-09-11
东台市卢顺建材有限公司
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention proposes a kind of gypsum and its preparation method, which solves the problem of direct discarding of desulfurized gypsum slag and slag fine powder solid waste in the prior art, which not only pollutes the existing environment, but also causes waste of resources

Method used

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Embodiment 1

[0023] The invention provides a light-weight plastering gypsum. The light-weight plastering gypsum is composed of 20-70 parts of desulfurized gypsum powder, 10-30 parts of slag fine powder, 10-40 parts of slag, 5-10 parts of cement, and 5-10 parts of bentonite , an appropriate amount of retarder and an appropriate amount of hypromellose by weight.

[0024] A kind of preparation method of lightweight plastering gypsum, the preparation steps of lightweight plastering gypsum are as follows:

[0025] 1) Pass the desulfurized gypsum powder, slag micropowder, slag, cement and bentonite through a sieve respectively for subsequent use;

[0026] 2) Select 20-70 parts of desulfurized gypsum powder, 10-30 parts of slag fine powder, 10-40 parts of slag, 5-10 parts of cement and 5-10 parts of bentonite into the mixer for stirring Mix for 30-40 minutes, make preliminary light plastering plaster and then stop for standby;

[0027] 3) Add an appropriate amount of retarder and appropriate am...

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Abstract

The invention discloses gypsum and a preparation method thereof. Lightweight plastered gypsum is formed by mixing 20-70 parts of desulfurized gypsum powder, 10-30 parts of slag micro-powder, 10-40 parts of slag, 5-10 parts of cement, 5-10 parts of bentonite, an appropriate part of retarder and an appropriate part of hydroxy propionate formaldehyde cellulose according to a weight ratio. According to the lightweight plastered gypsum and the preparation method, by adopting the desulfurized gypsum, the slag, the slag micro-powder and other raw materials for preparing the lightweight plastered gypsum, the problem of waste utilization is solved, environmental protection is facilitated, waste of resources is avoided, and meanwhile, the prepared lightweight plastered gypsum has great bonding performance; after basic layers of wall bodies are cleaned, the gypsum can be directly used for plastering different wall bodies. After a plastered layer is molded, the layer has a microdilatancy functionwithout shrinkage and generation of small cracks and can avoid hollowing and cracking phenomena after use; the gypsum has the advantages of being healthy, environmentally friendly, durable for a longtime, great in bonding strength, resistant to pulverization, cracking, hollowing and weathering and excellent in fireproof performance and thermal insulation performance and is conducive to improvement of architecture.

Description

technical field [0001] The invention relates to plastering gypsum and a preparation method thereof, in particular to gypsum and a preparation method thereof, belonging to the technical field of plastering gypsum. Background technique [0002] Desulfurization gypsum is solid waste brought by the desulfurization process of coal power plants and steel mills. More than 90% of the desulfurization process adopts wet lime, limestone-gypsum flue gas desulfurization process. The main chemical reactions of the lime or limestone method are as follows: [0003] Lime method: SO2+CaO+0.5H2O→CaSO3·0.5H2O [0004] CaSO3·0.5H2O+0.5O2+1.5H2O→CaSO4·2H2O [0005] Limestone method: SO2+CaSO3+0.5H2O→CaSO3·0.5H2O+CO2 [0006] CaSO3·0.5H2O+0.5O2+1.5H2O→CaSO4·2H2O [0007] The main component of desulfurization gypsum is calcium sulfate dihydrate (CaSO4·2H2O), which has high water content and strong viscosity. Its pH is equivalent to that of natural gypsum, and it is neutral or slightly alkaline....

Claims

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Application Information

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IPC IPC(8): C04B38/08C04B28/14
CPCC04B28/144C04B2111/00482C04B2111/40C04B18/142C04B18/10C04B14/104C04B7/02C04B2103/22C04B24/383C04B38/08
Inventor 卢冬生
Owner 东台市卢顺建材有限公司
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