Preparation method of desulphurization gypsum beta powder

A desulfurization gypsum and hemihydrate desulfurization gypsum technology, which is applied in the field of preparation of desulfurization gypsum β powder, can solve the problems of lagging comprehensive treatment of flue gas desulfurization gypsum in power plants, lack of natural dihydrate gypsum resources, etc., and achieve the effect of reducing noise and saving electric energy

Inactive Publication Date: 2014-03-26
邱伟
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The purpose is to comprehensively treat and use the industrial waste residue of power plants - flue gas desulfurization gypsum, so that it can replace natural dihydrate gypsum and become another gypsum building material and ceramic mold material, so as to solve the shortage of high-quality natural dihydrate gypsum resources, power plant smoke Gas desulfurization gypsum comprehensively treats the lagging problem, turns waste into treasure, and promotes the development of circular economy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment l

[0015] The desulfurized gypsum is screened into the warehouse, the fineness is 60 μm, the attached water is 10%, the input temperature is 400°C when feeding, calcined for 3 seconds, the output temperature is 160°C, homogenized and aged for 8 hours, and packaged to obtain desulfurized gypsum β powder . The initial setting is 4', the final setting is 12', and the 2h flexural strength is 3.0MPa, which can meet the requirements of "Building Gypsum" GB9776-88.

Embodiment 2

[0017] The desulfurized gypsum is screened and put into storage, with a fineness of 55 μm and 9% attached water. When feeding, the furnace temperature is 430°C, calcined for 2 seconds, and the discharge temperature is 180°C. It is homogenized and aged for 10 hours, and packaged to obtain desulfurized gypsum β powder. . The initial setting is 5', the final setting is 15', and the 2h flexural strength is 3.0MPa, which can meet the requirements of "Building Gypsum" GB9776-88.

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Abstract

The invention relates to a preparation method of desulphurization gypsum beta powder. The method comprises the following steps: (1) preparing basic materials: selecting and warehousing desulphurization gypsum; (2) calcining, scattering, drying and rolling to remove the crystallization water through a one-step secondary temperature increasing method by adopting an airflow rotational-flow dynamic flash roasting furnace to form semi-water desulphurization gypsum powder, and homogenizing, aging and packaging the desulphurization gypsum powder to obtain the desulphurization gypsum beta powder. The method is easy, convenient to operate and applicable to the mass production. The preparation method is used for comprehensively processing and utilizing the industrial waste residue-smoke desulphurization gypsum of a power plant and utilizing the desulphurization gypsum to substitute the natural dihydrate gypsum to become a gypsum building material and a material for ceramic mold, so that the problems that the dehydrate gypsum resource is in shortage and the smoke desulphurization gypsum comprehensive treatment of the power plant is lagging can be solved, the waste can be converted into treasures, and the cycling economic development can be promoted.

Description

[0001] technical field [0002] The invention relates to architectural decoration and ceramic model materials, in particular to a preparation method of desulfurized gypsum beta powder. Background technique [0003] The existing gypsum β powder on the market is fired from natural dihydrate gypsum, and is mainly used for architectural decoration and ceramic models such as gypsum boards, gypsum moldings, and gypsum blocks. Although China is a large gypsum country, there are very few high-quality dihydrate gypsum resources, accounting for only about 10%, and the others are mainly ordinary dihydrate gypsum and anhydrite. Since China's reform and opening up, especially in the past ten years, due to the rapid development of the construction field, the output of gypsum has increased rapidly, resulting in the shortage of high-quality natural dihydrate gypsum resources, and there is an urgent need for high-quality raw materials to replace them. [0004] On the other hand, in order to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B11/02
Inventor 邱伟
Owner 邱伟
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