Method for preparing desulfurization gypsum beta-powder

A desulfurization gypsum and attached water technology, which is applied in the field of architectural decoration and ceramic model materials, can solve the problems of the shortage of natural dihydrate gypsum resources, the lag of comprehensive treatment of flue gas desulfurization gypsum in power plants, etc., and achieve the effect of saving electric energy and reducing noise

Inactive Publication Date: 2008-10-29
黄梅龙源石膏有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 molding materia

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

Example 1

The desulfurized gypsum is screened and put into storage, the fineness is 60μm, the attached water is 10%, the feeding temperature is 400℃-calcining 3 seconds-the discharge temperature is 160℃-homogenization and aging for 8 hours-packing to make 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.

Example Embodiment

Example 2

The desulfurized gypsum is screened and put into storage, the fineness is 55μm, the attached water is 9%, the feeding temperature is 430℃-calcining 2 seconds-the discharge temperature is 180℃-homogenization and aging for 10 hours-packing to make 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.

Example Embodiment

Example 3

The desulfurized gypsum is screened and put into storage, the fineness is 45μm, the attached water is 9%, the feeding temperature is 450℃-calcining for 2 seconds-the discharge temperature is 200℃-homogenization and aging for 12 hours-packing to make desulfurized gypsum β powder . The initial setting is 6', the final setting is 17', and the 2h flexural strength is 3.1MPa, which can meet the requirements of "Building Gypsum" GB9776-88.

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Abstract

The invention discloses a preparation method for desulfurized gypsum Beta powder, and the steps are as follows: A. base material preparation: screening and warehousing the desulfurized gypsum of a power station with the fineness being 40 to 60 Mum, piling upwards by a piling shed and airing, and dehydrating some adhesive water (less than or equal to 10 percent). B. feeding the desulfurized gypsum which is aired and dehydrated off some adhesive water into an airflow rotational flow dynamic flash burning furnace in uniform motion, the inletting temperature when feeding materials is 400 to 500 DEG C, calcining (for 1 to 6 seconds), the discharge is controlled at temperature of 160 to 220 DEG C, then homogenizing and aging, thus preparing the desulfurized gypsum Beta powder by packaging. The method of the invention has the advantages of simple and easy execution, convenient operation and being suitable for mass production, and aims at comprehensively processing and applying smoke gas desulfurized gypsum in the industrial waste of the power station to lead the smoke gas desulfurized gypsum to replace natural dihydrate gypsum for becoming another gypsum building material and material used for ceramic die, thus solving the problems of resource shortage of high quality natural dihydrate gypsum and comprehensive processing hysteresis of the smoke gas desulfurized gypsum of the power station, changing waste into valuables and accelerating the development of cyclic economy.

Description

Preparation method of desulfurized gypsum beta powder technical field The invention relates to architectural decoration and ceramic model materials, and more specifically to a preparation method of desulfurized gypsum beta powder. Background technique 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. On ...

Claims

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Application Information

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IPC IPC(8): C04B11/26C04B22/14
CPCC04B11/264
Inventor 高德武余永忠孙家宽胡明涛
Owner 黄梅龙源石膏有限公司
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