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Retarder for desulfurization building gypsum

A technology for desulfurized building gypsum and retarder, which is applied in the field of retarder for desulfurized building gypsum, which can solve the problems of gypsum strength loss and achieve the effects of small strength loss, low cost and less dosage

Inactive Publication Date: 2017-02-01
GUANGXI HUILONG SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the retarding agent will cause different degrees of loss of gypsum strength while retarding, which limits the popularization and application of gypsum building materials to a certain extent.
Although there are some studies on how to reduce the negative impact of retarders on the strength of gypsum, they have not fundamentally solved the problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0016] This example takes the preparation of 100 g retarder as an example, and its preparation method is as follows.

[0017] 30% citric acid, 10% tetrapotassium pyrophosphate, 5% sodium alkyl sulfate, 55% edible salt.

[0018] Put the above-mentioned various raw materials into a mixer, and after fully mixing, the retarder for desulfurized building gypsum is obtained. When using, add appropriate amount of water to adjust evenly. The prepared retarder has a strong retarding effect and can significantly prolong the retarding time of the desulfurized building gypsum. The strength loss of desulfurized building gypsum is small. Less dosage and lower cost.

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PUM

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Abstract

The invention relates to a retarder for desulfurization building gypsum. The retarder for the desulfurization building gypsum is made of raw material by proportion: 20-30% of citric acid, 10-15% of tetrapotassium pyrophosphate, 2-5% of sodium alkyl sulfate and 50-68% of edible salt. The retarder for the desulfurization building gypsum is a retarder which is obtained by using the citric acid, the tetrapotassium pyrophosphate and the sodium alkyl sulfate as main coagulation delaying ingredients and adding the edible salt, contains few additives, is good in retarding effect, and simultaneously causes little loss to strength of the gypsum.

Description

technical field [0001] The invention relates to a retarder for desulfurization building gypsum. Background technique [0002] Desulfurization gypsum is solid waste produced after flue gas desulfurization in coal-fired power plants. After dehydration and calcination, it can be made into desulfurization building gypsum. Its technical indicators can meet the requirements of national standards, and its flexural and compressive strengths are higher than national standards. The required value of building gypsum strength is high-quality building gypsum, which can be used as a raw material for various gypsum products. However, the early strength of gypsum materials develops quickly, the setting and hardening time is short, and it will lose fluidity in ten minutes or even a few minutes, especially In the preparation of foam blocks, the optimal combination time of other raw materials affecting foam cannot meet the construction requirements. In order to overcome this deficiency, it is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/16C04B103/22
CPCC04B40/0039C04B2103/22C04B24/06C04B22/16C04B24/16C04B22/124
Inventor 凌克首凌克翠
Owner GUANGXI HUILONG SCI & TECH CO LTD
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