A kind of phosphogypsum wall brick and preparation method thereof

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...

Examples

Embodiment 1

[0022] The phosphogypsum wall brick provided in this example is made of the following raw materials in parts by weight: 100 parts of phosphogypsum, 10 parts of carbide slag, 12 parts of hydraulic admixture, 5 parts of rough 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, which can be used as inert aggregate in the product.

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

Embodiment 2

[0026] The phosphogypsum wall brick provided in this example is made of the following raw materials in parts by weight: 100 parts of phosphogypsum, 6 parts of carbide slag, 15 parts of hydraulic admixture, 8 parts of rough 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 as follows: mixing and stirring phosphogypsum and carbide slag, and spraying with water mist; granulating the mixture of phosphogypsum and carbide slag to obtain cube-shaped particles with a particle size of 9 -20mm, and air-dry under natural conditions; mix spherical particles with hydraulic admixtures, aggregates and admixtures, add water and stir to form a uniform slurry; inject the slurry into a molding machine for compression molding, and the molding pressure is 20MPa; The formed products are naturally cured to produce phosphogypsum wall br...

Embodiment 3

[0030] The phosphogypsum wall brick provided in this example is made of the following raw materials in parts by weight: 100 parts of phosphogypsum, 8 parts of carbide slag, 8 parts of hydraulic admixture, 7.5 parts of rough 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 as follows: mixing and stirring phosphogypsum and carbide slag, and spraying with water mist; granulating the mixture of phosphogypsum and 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 admixtures, add water and stir to form a uniform slurry; inject the slurry into a molding machine for compression molding, and the molding pressure is 8MPa; The formed products are naturally cured to obtain phosphogypsum wa...

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...

Examples

Embodiment 1

[0022] The phosphogypsum wall brick provided in this example is made of the following raw materials in parts by weight: 100 parts of phosphogypsum, 10 parts of carbide slag, 12 parts of hydraulic admixture, 5 parts of rough 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, which can be used as inert aggregate in the product.

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

Embodiment 2

[0026] The phosphogypsum wall brick provided in this example is made of the following raw materials in parts by weight: 100 parts of phosphogypsum, 6 parts of carbide slag, 15 parts of hydraulic admixture, 8 parts of rough 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 as follows: mixing and stirring phosphogypsum and carbide slag, and spraying with water mist; granulating the mixture of phosphogypsum and carbide slag to obtain cube-shaped particles with a particle size of 9 -20mm, and air-dry under natural conditions; mix spherical particles with hydraulic admixtures, aggregates and admixtures, add water and stir to form a uniform slurry; inject the slurry into a molding machine for compression molding, and the molding pressure is 20MPa; The formed products are naturally cured to produce phosphogypsum wall br...

Embodiment 3

[0030] The phosphogypsum wall brick provided in this example is made of the following raw materials in parts by weight: 100 parts of phosphogypsum, 8 parts of carbide slag, 8 parts of hydraulic admixture, 7.5 parts of rough 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 as follows: mixing and stirring phosphogypsum and carbide slag, and spraying with water mist; granulating the mixture of phosphogypsum and 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 admixtures, add water and stir to form a uniform slurry; inject the slurry into a molding machine for compression molding, and the molding pressure is 8MPa; The formed products are naturally cured to obtain phosphogypsum wa...

Images