Method for producing baking-free bricks by using phosphorous gypsum based cementitious material to solidify yellow phosphorous slags

Abstract

The invention provides a method for producing baking-free bricks by using phosphorous gypsum based cementitious material to solidify yellow phosphorous slags. 1) The raw materials and formula of the invention are as follows: (1) the phosphorous gypsum cementitious material: 40-60 parts of phosphorous gypsum, 0-30 parts of yellow phosphorous slags, 0-30 parts of pulverized fuel ash, 0-5 parts of blast furnace slag, 10-15 parts of calcined lime, and 0-10 parts of carbide slag; (2) the mateirals of the baking-free brick green bodies: 100 parts of phosphorous gypsum cementitious material, 150-300parts of yellow phosphorous slags raw materials, 2-4 parts of activator, 0.2-1 part of auxiliary agent, and 10-40 parts of water. 2) The preparation method: the baking-free bricks are produced throughthe steps of treating raw materials, mixing the solution with additive, preparing brick blanks and moulding and conserving. In the production process of the invention, no organic matter is added, thus completely avoiding the pollution problems of toxic substance caused by degradation of organic materials, and the release of additive and volatilization of residues, and having the advantages of lowcost, good physical property, high production efficiency, saving of energy consumption and non environmental pollution.

Description

technical field

[0001] The invention relates to the technical field of building material preparation, in particular to a method for producing burn-free bricks by using phosphogypsum-based cementitious material to solidify yellow phosphorus slag. Background technique

[0002] Phosphogypsum is a solid waste produced during the production of high-concentration phosphate fertilizers. According to incomplete statistics, the domestic stockpile of phosphogypsum slag has reached more than 100 million tons, and 30 million tons of phosphogypsum slag will be newly produced every year. About 10%, the rest is still mainly treated by stacking. With the increase of the production of high-concentration phosphate compound fertilizer and the decrease of the grade of raw material phosphate rock, the production of phosphogypsum slag will increase. It is estimated that by 2010, the national production of phosphogypsum slag will reach 50 million tons. The resulting environmental pollution and la...

Examples

Embodiment 1

[0045] 1) Formula composition (substance measurement units are parts by mass):

[0046] Phosphogypsum cementitious material formula: 40 parts of phosphogypsum, 30 parts of yellow phosphorus slag, 20 parts of fly ash, and 10 parts of quicklime. The phosphogypsum cementitious material in the unburned brick body raw material is 100 parts, the reinforcing material yellow phosphorus slag is 233 parts; the activator is 1 part of water glass, 0.5 parts of sodium carbonate, and 2.5 parts of caustic soda; the auxiliary agent is 0.1 parts of calcium lignosulfonate 0.2 part of sodium humate, 0.5 part of calcium fluorosilicate, 0.1 part of sodium fluorosilicate; 30 parts of water;

[0047] 2) Process: blend and grind yellow phosphorus slag, fly ash, blast furnace slag, quicklime and water-insoluble additives calcium fluorosilicate and calcium lignosulfonate according to the formula into a powder with a particle size of less than 0.08mm, accounting for 96% Reinforcement materials are crus...

Embodiment 2

[0050] 1) Formula composition (substance measurement units are parts by mass):

[0051] The formula of phosphogypsum cementitious material is: 50 parts of phosphogypsum, 30 parts of fly ash, 5 parts of blast furnace slag, and 15 parts of quicklime. The phosphogypsum cementitious material in the unburned brick body raw material is 100 parts, the reinforcing material yellow phosphorus slag is 300 parts; the activator is 1 part of water glass, 2.0 parts of caustic soda; the auxiliary agent is 0.2 part of calcium lignosulfonate, and 0.1 part of borax , 0.35 parts of calcium fluorosilicate, 0.3 parts of sodium phosphate; 30 parts of water;

[0052] 2) Process: Fly ash, blast furnace slag, quicklime and water-insoluble additives calcium fluorosilicate, borax, calcium lignosulfonate measured according to the formula are blended and ground into a powder with a particle size of less than 0.08mm, accounting for 95.4%; Reinforcement materials are crushed and sieved to become coarse part...

Embodiment 3

[0055] 1) Formula composition (substance measurement units are parts by mass):

[0056] The formula of the phosphogypsum cementitious material is: 60 parts of phosphogypsum, 20 parts of yellow phosphorus slag, 10 parts of fly ash, and 10 parts of calcium carbide slag. The phosphogypsum cementitious material in the unburned brick body raw material is 100 parts, the reinforcing material yellow phosphorus slag is 150 parts; the activator is 1.5 parts of water glass, 2.5 parts of caustic soda; 0.3 parts of calcium; 10 parts of water;

[0057] 2) Process: blend and grind yellow phosphorus slag, fly ash, blast furnace slag and water-insoluble additives calcium fluorosilicate and calcium lignosulfonate according to the formula to form a powder with a particle size of less than 0.08mm accounting for 95%; Reinforcement materials are crushed and sieved to become coarse particles with less than 10% sieve residue on 5mm square hole sieve and more than 90% sieve residue on 0.6mm square ho...

technical field

[0001] The invention relates to the technical field of building material preparation, in particular to a method for producing burn-free bricks by using phosphogypsum-based cementitious material to solidify yellow phosphorus slag. Background technique

[0002] Phosphogypsum is a solid waste produced during the production of high-concentration phosphate fertilizers. According to incomplete statistics, the domestic stockpile of phosphogypsum slag has reached more than 100 million tons, and 30 million tons of phosphogypsum slag will be newly produced every year. About 10%, the rest is still mainly treated by stacking. With the increase of the production of high-concentration phosphate compound fertilizer and the decrease of the grade of raw material phosphate rock, the production of phosphogypsum slag will increase. It is estimated that by 2010, the national production of phosphogypsum slag will reach 50 million tons. The resulting environmental pollution and la...

Examples

Embodiment 1

[0045] 1) Formula composition (substance measurement units are parts by mass):

[0046] Phosphogypsum cementitious material formula: 40 parts of phosphogypsum, 30 parts of yellow phosphorus slag, 20 parts of fly ash, and 10 parts of quicklime. The phosphogypsum cementitious material in the unburned brick body raw material is 100 parts, the reinforcing material yellow phosphorus slag is 233 parts; the activator is 1 part of water glass, 0.5 parts of sodium carbonate, and 2.5 parts of caustic soda; the auxiliary agent is 0.1 parts of calcium lignosulfonate 0.2 part of sodium humate, 0.5 part of calcium fluorosilicate, 0.1 part of sodium fluorosilicate; 30 parts of water;

[0047] 2) Process: blend and grind yellow phosphorus slag, fly ash, blast furnace slag, quicklime and water-insoluble additives calcium fluorosilicate and calcium lignosulfonate according to the formula into a powder with a particle size of less than 0.08mm, accounting for 96% Reinforcement materials are crus...

Embodiment 2

[0050] 1) Formula composition (substance measurement units are parts by mass):

[0051] The formula of phosphogypsum cementitious material is: 50 parts of phosphogypsum, 30 parts of fly ash, 5 parts of blast furnace slag, and 15 parts of quicklime. The phosphogypsum cementitious material in the unburned brick body raw material is 100 parts, the reinforcing material yellow phosphorus slag is 300 parts; the activator is 1 part of water glass, 2.0 parts of caustic soda; the auxiliary agent is 0.2 part of calcium lignosulfonate, and 0.1 part of borax , 0.35 parts of calcium fluorosilicate, 0.3 parts of sodium phosphate; 30 parts of water;

[0052] 2) Process: Fly ash, blast furnace slag, quicklime and water-insoluble additives calcium fluorosilicate, borax, calcium lignosulfonate measured according to the formula are blended and ground into a powder with a particle size of less than 0.08mm, accounting for 95.4%; Reinforcement materials are crushed and sieved to become coarse part...

Embodiment 3

[0055] 1) Formula composition (substance measurement units are parts by mass):

[0056] The formula of the phosphogypsum cementitious material is: 60 parts of phosphogypsum, 20 parts of yellow phosphorus slag, 10 parts of fly ash, and 10 parts of calcium carbide slag. The phosphogypsum cementitious material in the unburned brick body raw material is 100 parts, the reinforcing material yellow phosphorus slag is 150 parts; the activator is 1.5 parts of water glass, 2.5 parts of caustic soda; 0.3 parts of calcium; 10 parts of water;

[0057] 2) Process: blend and grind yellow phosphorus slag, fly ash, blast furnace slag and water-insoluble additives calcium fluorosilicate and calcium lignosulfonate according to the formula to form a powder with a particle size of less than 0.08mm accounting for 95%; Reinforcement materials are crushed and sieved to become coarse particles with less than 10% sieve residue on 5mm square hole sieve and more than 90% sieve residue on 0.6mm square ho...