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Gypsum retarder

The technology of gypsum retarder and phosphogypsum, which is applied in the field of gypsum retarder, can solve the problems of water system and land pollution, land occupation, harm, etc., and achieve the effects of reducing power consumption, improving grindability and obvious output.

Pending Publication Date: 2018-12-18
曲靖市麒麟区鑫强商贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Long-term stacking of these by-products occupies a large amount of land, causing serious pollution and harm to water systems and land

Method used

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  • Gypsum retarder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A kind of gypsum retarder, wherein, composition and weight percent are as follows:

[0020] Quicklime powder 4%

[0021] Desulfurization gypsum 57%

[0022] Phosphogypsum 38%

[0023] Gypsum admixture 1%;

[0024] After mixing quicklime powder, desulfurized gypsum, phosphogypsum and gypsum admixture according to the above ratio, transport it to the mixer with a belt and stir for 2 minutes. After mixing evenly, stack and age for 3 days, and then use it in cement production. 5% of the specific gravity of the compound.

Embodiment 2

[0026] A kind of gypsum retarder, wherein, composition and weight percent are as follows:

[0027] Quicklime powder 2.7%

[0028] Desulfurization gypsum 63%

[0029] Phosphogypsum 33.9%

[0030] Gypsum admixture 0.4%;

[0031] After mixing quicklime powder, desulfurized gypsum, phosphogypsum and gypsum admixture according to the above ratio, transport it to the mixer with a belt and stir for 2 minutes. After mixing evenly, stack and age for 5 days, and then use it in cement production. 6% of the specific gravity of the compound.

Embodiment 3

[0033] A kind of gypsum retarder, wherein, composition and weight percent are as follows:

[0034] Quicklime powder 3.8%

[0035] Desulfurized gypsum 66.5%

[0036] Phosphogypsum 28.5%

[0037] Gypsum admixture 1.2%;

[0038] After mixing quicklime powder, desulfurized gypsum, phosphogypsum and gypsum admixture according to the above ratio, transport it to the mixer with a belt and stir for 3 minutes. After mixing evenly, stack and age for 4 days, and then use it in cement production. 5% of the specific gravity of the compound.

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Abstract

The invention relates to a gypsum retarder. Desulphurization gypsum discharged from a coal-fired power plant, phosphogypsum discharged from a phosphate fertilizer plant, a gypsum admixture and quicklime powder are mixed according to a certain ratio, are uniformly mixed, and then are stacked and aged, and the obtained material is used as a retarder in cement production to realize the reasonable utilization of an industrial byproduct gypsum generated in the plants. The quicklime powder, desulphurization gypsum, phosphogypsum and the gypsum admixture are mixed in proportion, and the mixture is conveyed into a stirrer by a belt, is stirred for 2-3 min until the mixture uniform, and is stacked and aged for 3-5 d. The produced retarder can greatly improve the compatibility between the cement andthe admixture.

Description

technical field [0001] The invention belongs to the technical field of gypsum application, in particular to a gypsum retarder using waste desulfurized gypsum and phosphogypsum as raw materials. Background technique [0002] With the development of agriculture, the output of phosphate fertilizer has increased repeatedly, and the amount of phosphogypsum is also increasing day by day; the desulfurization gypsum emitted by coal-fired power plants is also increasing with the increase of electricity consumption. Long-term stacking of these by-products occupies a large amount of land, causing serious pollution and harm to water systems and land. After rainwater leaching, the soluble components in it seep down from the surface with the water, migrate and transform into the soil, enrich harmful substances, acidify, alkalinize, harden the soil near the storage yard, and even cause heavy metal pollution. With the rapid development of science and technology today, how to properly dispo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B22/14C04B103/22
CPCC04B40/0039C04B2103/22C04B22/064C04B22/144C04B22/145
Inventor 李所芬
Owner 曲靖市麒麟区鑫强商贸有限公司
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