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Method for producing aerated building block with phosphogypsum as main raw material

An air-entrained block and phosphogypsum technology is applied in the fields of comprehensive utilization of resources and new building materials to achieve the effects of reducing secondary pollution and high cost problems, saving natural resources and using large amounts

Inactive Publication Date: 2014-07-02
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The production method of using phosphogypsum as the main raw material for aerated blocks has not been reported yet

Method used

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  • Method for producing aerated building block with phosphogypsum as main raw material

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Embodiment 1

[0035] Embodiment 1: This is the method for producing aerated block with phosphogypsum as the main raw material, the specific content is as follows:

[0036] 1, the raw material composition is as follows in this method:

[0037] (1) Main materials: phosphogypsum 21kg, blast furnace slag 7.5kg, hydrated lime 1.5kg;

[0038] (2) Process water is alkali-containing wastewater from paper mills, and the mass ratio of water to main materials is 1:0.85;

[0039] (3) Mineral stimulant additional components: sodium sulfate and sodium chloride are 1.2% of the mass of slaked lime, and the mass ratio of sodium sulfate to sodium oxide is 1:1;

[0040] (4) Auxiliary raw materials: 0.05% of aluminum powder as the main material; 0.5% of additives as the main material, including 70 parts of water glass, 25 parts of sodium hydroxide, and 5 parts of sodium lignosulfonate.

[0041] 2, the concrete operation of the present invention is as follows:

[0042] Mix and age 7.5kg of blast furnace slag...

Embodiment 2

[0044] Embodiment 2: This is the method for producing aerated block with phosphogypsum as the main raw material, the specific content is as follows:

[0045] 1, the raw material composition is as follows in this method:

[0046] (1) Main materials: phosphogypsum 18kg, yellow phosphorus slag 6kg, activated iron tailings 2.4kg, carbide slag (dry basis) 3.6kg;

[0047] (2) The process water is recycled reclaimed water, and the mass ratio of water to main material is 1:0.95(m / m);

[0048] (3) Additional components of mineral activator: sodium sulfate and sodium oxide are 0.5% of the mass of carbide slag, and the mass ratio of sodium sulfate and sodium oxide is 1:0.5;

[0049] (4) Auxiliary raw materials: 0.04% of aluminum powder as the main raw material; 0.3% of additives as the main raw material, including 70 parts of water glass, 25 parts of sodium hydroxide, and 5 parts of calcium lignosulfonate.

[0050] 2, the concrete operation of the present invention is as follows:

[0...

Embodiment 3

[0053] Embodiment 3: this is the method for producing aerated block with phosphogypsum as the main raw material, the specific content is as follows:

[0054] 1, the raw material composition is as follows in this method:

[0055] (1) Main materials: phosphogypsum 19.5kg, yellow phosphorus slag 4.5kg, fly ash 4.0kg, slaked lime 2.0kg;

[0056] (2) The process water is condensed water, and the mass ratio of water to main material is 1:0.9;

[0057] (3) Mineral activator additional components: sodium sulfate and sodium oxide are 0.4% of slaked lime, and the ratio of sodium sulfate to sodium oxide is 1:0.8;

[0058] (4) Auxiliary raw materials: aluminum powder is 0.05% of the main raw material; additives are 0.4% of the main raw material, including 60 parts of water glass, 25 parts of sodium hydroxide, 10 parts of calcium lignosulfonate, lignosulfonic acid Sodium 5 parts.

[0059] 2, the concrete operation of the present invention is as follows:

[0060] Mix and age 4.5kg of ye...

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Abstract

The invention discloses a method for producing aerated blocks using phosphogypsum as the main raw material. Putting phosphogypsum, industrial waste residue, main components of mineral stimulants, aluminum powder or aluminum paste into a mixer with adjustable speed and adding water Stir, first stir slowly for 3 minutes, then stir quickly for 2 minutes, then add mineral stimulant additional components and additives, stir quickly for 3 minutes, complete the pulping and pour it into the mold, foam for 30-40 minutes, and then statically stand at 50-55°C After 4 hours of maintenance, demoulding, cutting, and atmospheric pressure steam curing for 16 to 24 hours, the aerated block can be obtained. Compared with the prior art, the method of the present invention has the advantages of stable physical properties, good thermal insulation, high utilization rate of phosphogypsum, simple process, low cost, saving natural resources, etc., and the product can be widely used in urban high-rise buildings as non-load-bearing partitions, It is used for low-temperature insulation of industrial equipment and insulation blocks of frozen warehouses.

Description

technical field [0001] The invention relates to a method for producing an aerated block using phosphogypsum as a main raw material, and belongs to the technical field of comprehensive utilization of resources and new building materials. 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 in the production of high-concentration phosphorus compound fertilizers and the decrease in the grade of raw material phosphate rock, the production of phosphogypsum slag will increase. It is estimated that by 2012, the national production of phosphogypsum slag will reach 55 million tons. The resulting environmental pollution and land ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14
Inventor 郑江宁夏举佩张召述晁静霞
Owner KUNMING UNIV OF SCI & TECH
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