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Method for preparing aerated concrete blocks by using andalusite mineral waste residues

A technology of aerated concrete and waste slag is applied in the field of building materials to achieve the effects of improving resource utilization, saving mineral resources and reducing pollution

Active Publication Date: 2014-01-08
XINJIANG BAOAN NEW BUILDING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Andalusite waste slag reserves are abundant, if it is not utilized, it will be a huge loss, and at the same time it will become a new source of dust pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for preparing an air-entrained concrete block using waste andalusite slag, the specific steps are as follows:

[0019] 1) Material preparation

[0020] Prepare materials according to the following components by weight fraction respectively:

[0021] 70 parts of andalusite waste slag, 10 parts of quicklime, 2 parts of cement, 0.04 part of aluminum powder, 2 parts of fly ash,

[0022] Grinding andalusite waste slag, quicklime and fly ash to 200 mesh;

[0023] The effective CaO content of the quicklime is more than 80%, and it is placed in the air for 3 days after leaving the kiln;

[0024] 2) Mix andalusite waste slag with water to make a slurry with a mass concentration of 59%, add other components to the slurry in turn, heat to 45°C, stir evenly, and expand with gas;

[0025] 3) Pour the gas-expanded mixture into the mold box, and keep the green body at 40°C for 1.5 hours;

[0026] 4) After cutting the rested green body, send it to a steam curing kettle, an...

Embodiment 2

[0034] A method for preparing aerated concrete blocks by using waste andalusite slag, the specific steps are as follows: 1) Material preparation: prepare materials according to the following components by weight fraction:

[0035] 75 parts of waste slag of andalusite, 12 parts of quicklime, 3 parts of cement, 0.05 part of aluminum powder, 2 parts of fly ash, and waste slag of andalusite, quicklime and fly ash are pulverized to 200 orders; The effective CaO content of described quicklime is in More than 80%, placed in the air for 5 days after leaving the kiln;

[0036] 2) Mix andalusite waste slag with water to make a slurry with a mass concentration of 60%, add other components to the slurry in turn, heat to 45°C, stir evenly, and expand with gas;

[0037] 3) Pour the gas-expanded mixture into the mold box, and keep the green body at 40°C for 2 hours;

[0038] 4) After cutting the rested body, send it to a steam curing kettle, and steam it for 8 hours in water vapor with a te...

Embodiment 3

[0046] A method for preparing an air-entrained concrete block using waste andalusite slag, the specific steps are as follows:

[0047] 1) Material preparation: Prepare materials according to the weight fraction according to the following components:

[0048] 80 parts of andalusite waste slag, 15 parts of quicklime, 5 parts of cement, 0.05 part of aluminum powder, 3 parts of fly ash,

[0049] Grinding andalusite waste slag, quicklime and fly ash to 200 mesh;

[0050] The effective CaO content of the quicklime is more than 80%, and it is placed in the air for 4 days after leaving the kiln;

[0051] 2) Mix andalusite waste slag with water to make a slurry with a mass concentration of 63%, add other components to the slurry in turn, heat to 45°C, stir evenly, and expand with gas;

[0052] 3) Pour the gas-expanded mixture into the mold box, and keep the green body at 40°C for 2 hours;

[0053] 4) Cut the green body that has been rested and send it to a steam curing kettle for 8 ...

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Abstract

The invention relates to a method for preparing aerated concrete blocks by using andalusite mineral waste residues. The method comprises the following steps: (1) preparing the following materials in parts by weight: 70-80 parts of andalusite mineral waste residues, 10-15 parts of quick lime, 2-5 parts of cement, 0.04-0.05 part of aluminium powder and 2-3 parts of coal ash; (2) mixing and stirring; (3) pouring and stilly curing; and (4) carrying out steam curing. The method has the beneficial effects that novel energy-saving building materials are prepared by the physical denaturation of the andalusite mineral waste residues, the pollution of the industrial mineral waste residues to environments is reduced, mineral resources are effectively saved, and the resource utilization rate is increased.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a method for preparing aerated concrete blocks by utilizing waste andalusite slag. Background technique [0002] Andalusite waste slag reserves are abundant, if it is not utilized, it will be a huge loss, and at the same time it will become a new source of dust pollution. Andalusite waste slag aerated concrete block is a new type of building wall material certified by the state, which is in line with the policy direction of the country's comprehensive utilization of resources, circular economy, and conservation of land resources. [0003] The main chemical composition of andalusite waste slag is SiO 2 、Al 2 o 3 , Fe 2 o 3 、TiO 2 , CaO, etc., the main mineral composition is SiO 2 (quartz), KFeMg 2 (AlSi 3 o 10 ) (biotite), Al 2 (SiO 4 ) O (andalusite). [0004] Due to the limited quartz content in waste slag (the active SiO2 component that aerated concrete blocks mus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B38/02C04B18/12
CPCY02W30/91
Inventor 张超美林力子马小虎郑胜利郑锋华
Owner XINJIANG BAOAN NEW BUILDING MATERIAL
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