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Method for producing gypsum building products by pressing process

A technology for gypsum and products, which is applied in the field of production of gypsum building products, which can solve the problems of low product strength, reduced product strength, and extended production cycle, and achieves the effects of low free moisture content, reduced production energy consumption, and fast production speed

Inactive Publication Date: 2010-02-17
方承仕
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Second, due to the addition of excessive water, a large number of pores are formed in the product, which reduces the compactness of the material and the strength of the product
[0007] Due to the addition of a large amount of water in the ingredients, the drying of gypsum products has become a large energy consumption of the enterprise, which greatly prolongs the production cycle of the products that harden quickly; moreover, the product has low strength and poor water resistance, which limits the application of the product field

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0034] Example: Production of gypsum-fly ash bricks and blocks by pressing process

[0035] 1. Preparation of gypsum pressed material

[0036] Gypsum compacts are formulated in the following % by weight:

[0037] Building gypsum calcined with desulfurized gypsum as raw material, 52%;

[0038] Fly ash (Class II ash), 26%;

[0039] Methylcellulose 0.5%;

[0040] Citric acid 0.5%;

[0041] Mix water 21%;

[0042] Second, compression molding:

[0043] 1. Weigh and mix construction gypsum, fly ash, and methyl cellulose to form a dry powder mixture;

[0044] 2. Weigh and dissolve citric acid in mixing water to make a mixing aqueous solution;

[0045] 3. Add the mixed aqueous solution to the dry powder mixture, and stir evenly in a forced mixer to form a semi-dry pressed material;

[0046] 4. Use an automatic hydraulic molding machine to press the pressed material into gypsum-fly ash bricks or blocks. Let stand for 8 hours. The compressive strength of the product can reach ...

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Abstract

The invention provides a process method for quickly producing gypsum building products with the advantages of water and energy conservation and top quality, particularly a method for producing gypsumbuilding products by pressing process. The method comprises the following steps: firstly, preparing building gypsum, packing powder, plasticizing agent, adjustable solidification agent, waterproof agent and mixing water into a gypsum pressing material; and pressing the gypsum pressing material into various building products inside dies of required size and shape by different types of pressure forming machines. The method for producing gypsum building products by pressing process has the outstanding advantages that: (1) product base material has very high intensity and the intensity of pressedcompact base material is 2 to 5 times that of cast base material, thereby showing excellent performance and development space for the application of gypsum products; (2) molded products have very lowfree moisture content and do not require baking or drying, thereby greatly reducing energy consumption during production; and (3) the method has quick production speed and short production cycle, thereby providing a quick process for producing gypsum building products.

Description

Technical field [0001] The present invention relates to a process for producing gypsum building products, in particular to a method for producing gypsum building products by pressing. Background technique [0002] With the implementation of major development guidelines such as saving resources, protecting the environment, and developing circular economy, due to the requirements for the development of ecological buildings and green building materials in construction projects, gypsum building materials with gypsum as the main body have attracted more and more attention from the construction industry. This is because : Gypsum is a recognized green building material: gypsum can be used as medicine, and it is also a food additive. Disposal is recyclable. The development of gypsum building materials can save energy consumption, reduce greenhouse gas emissions, and meet the requirements of energy conservation and emission reduction. [0003] my country has favorable conditions fo...

Claims

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Application Information

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IPC IPC(8): B28C7/04B28C1/04B28B3/00B28B1/52B28B11/24
Inventor 方承仕
Owner 方承仕
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