A kind of phosphogypsum wall brick and preparation method thereof

A technology of gypsum wall and phosphogypsum, which is applied in the field of phosphogypsum wall bricks and its preparation, can solve the problems that harmful impurities cannot be removed, phosphogypsum raw materials are not pretreated, and the performance of products is affected, so as to realize the comprehensive utilization of building materials resources , Improve the compactness and softening coefficient, and eliminate the effect of adverse effects

Active Publication Date: 2011-12-14
广东省建筑材料研究院有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, research and patents on the preparation of various brick wall materials using industrial waste phosphogypsum as the main raw material have appeared in China. However, after comprehensive comparison and consideration, there are the following problems: 1. The raw material of phosphogypsum cannot be removed without pretreatment. Harmful impurities, Affect the performance of the product; 2. The

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  • A kind of phosphogypsum wall brick and preparation method thereof
  • A kind of phosphogypsum wall brick and preparation method thereof

Examples

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Example Embodiment

[0021] Example 1

[0022] The phosphogypsum wall brick provided in this embodiment is made of the following parts by weight of raw materials: 100 parts of phosphogypsum, 10 parts of calcium carbide slag, 12 parts of hydraulic admixture, 5 parts of coarse stone, 10 parts of stone powder, Yuan Ming 1.5 parts of powder, 3 parts of water glass, 0.2 parts of calcium formate, 4 parts of calcium lignosulfonate. Among them, phosphogypsum is granular and can be used as inert aggregate in the product.

[0023] The preparation method of the phosphogypsum wall brick is: mixing phosphogypsum and calcium carbide slag, and spraying with water mist; granulating the mixture of phosphogypsum and calcium carbide slag to obtain spherical particles with a particle size of 8 -15mm, and air-dried under natural conditions; mix spherical particles with hydraulic admixtures, aggregates and additives, add water and stir to form a uniform slurry; inject the slurry into the molding machine for compression mo...

Example Embodiment

[0025] Example 2

[0026] The phosphogypsum wall brick provided in this embodiment is made of the following raw materials in parts by weight: 100 parts of phosphogypsum, 6 parts of calcium carbide slag, 15 parts of hydraulic admixture, 8 parts of coarse stone, 16 parts of stone powder, Yuan Ming 2 parts of powder, 4 parts of water glass, 0.1 part of calcium formate, 2 parts of calcium lignosulfonate.

[0027] The preparation method of the phosphogypsum wall brick is: mixing phosphogypsum and calcium carbide slag, and spraying with water mist; granulating the mixture of phosphogypsum and calcium carbide slag to obtain cubic particles with a particle size of 9 -20mm, and air-dried under natural conditions; mix the spherical particles with hydraulic admixtures, aggregates and additives, add water and stir to form a uniform slurry; inject the slurry into the molding machine for compression molding, the molding pressure is 20MPa; The molded products are naturally cured to obtain phosp...

Example Embodiment

[0029] Example 3

[0030] The phosphogypsum wall brick provided in this embodiment is made of the following raw materials by weight: 100 parts of phosphogypsum, 8 parts of calcium carbide slag, 8 parts of hydraulic admixture, 7.5 parts of coarse stone, 15 parts of stone powder, Yuan Ming 0.5 parts of powder, 5 parts of water glass, 0.05 parts of calcium formate, 6 parts of calcium lignosulfonate.

[0031] The preparation method of the phosphogypsum wall brick is: mixing phosphogypsum and calcium carbide slag, and spraying with water mist; granulating the mixture of phosphogypsum and calcium carbide slag to obtain tetrahedral particles with a particle size of 9- 20mm, and air-dried under natural conditions; mix spherical particles with hydraulic admixtures, aggregates and additives, add water and stir to form a uniform slurry; inject the slurry into the molding machine for compression molding, the molding pressure is 8MPa; The molded product is naturally cured to produce phosphogy...

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Abstract

The invention discloses a phosphogypsum wall brick, which comprises the following raw materials in parts by weight: 90-105 parts of phosphogypsum, 6-10 parts of carbide slag, 8-15 parts of hydraulic admixture, 5-8 parts of rough stone, 10-16 parts of stone powder, 0.5-2 parts of anhydrous sodium sulfate, 3-5 parts of water glass, 0.05-0.2 part of calcium formate, and 2-6 parts of calcium lignosulphonate. The wall brick has the characteristics of light weight, high strength, low water absorption, high softening coefficient and good freezing resistance, is suitable for a building load-bearing and spacing wall body. The invention also discloses a preparation method of the phosphogypsum wall brick. According to the method disclosed by the invention, large quantities of industrial waste residue phosphogypsum is effectively utilized, the building material resource comprehensive utilization of the phosphogypsum can be achieved; meanwhile, a phosphogypsum and carbide slag composite pelletizing technology is adopted harmful substances in the phosphogypsum raw material can be removed, and the softening coefficient and strength of a phosphogypsum product can be increased.

Description

technical field [0001] The invention belongs to the technical field of resource utilization of industrial waste slag building materials, and in particular relates to a phosphogypsum wall brick and a preparation method thereof. Background technique [0002] Phosphogypsum is the industrial waste slag discharged during the production of phosphoric acid. For every ton of phosphoric acid produced, 5 tons of phosphogypsum are discharged. With the continuous development of my country's chemical industry, the discharge of phosphogypsum is increasing year by year. The main phase component of phosphogypsum is calcium sulfate dihydrate (CaSO 4 2H 2 O), which also contains a small amount of impurities, such as soluble phosphorus, eutectic phosphorus, organic matter, soluble fluorine, etc. Impurities have adverse effects on the setting time of gypsum and the strength of the product, and are difficult to remove. In addition, phosphogypsum products generally have the disadvantages of eas...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B28/36
Inventor 张立文林克辉谢红波杨军高子栋黄宏伟
Owner 广东省建筑材料研究院有限公司
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