Processing technology for reducing deformation defects in coal gangue hollow brick production

A processing technology and hollow brick technology, which is applied in the field of processing technology to reduce deformation defects in the production of coal gangue hollow bricks, can solve problems such as low moisture content, achieve uniform shrinkage, reduce deformation defects, and improve quality

Inactive Publication Date: 2021-01-26
安徽滨江新型墙材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to solve the problems existing in the prior art and provide a processing technology for reducing deformation defects in the production of coal gangue hollow bricks. By reducing the blockage of water passages in brick adobes, the water discharge rate can be improved, making dry In the finished adobe, not only the moisture content is low, but also the moisture distribution is uniform, thereby improving the shrinkage uniformity of the adobe during the firing process, and realizing the technical effect of reducing deformation defects of the adobe after firing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A processing technology for reducing deformation defects in the production of coal gangue hollow bricks, the specific technology is as follows:

[0018] 1) Weigh an appropriate amount of zinc nitrate and aluminum nitrate and add it to distilled water, mix well to obtain a mixed salt solution with a zinc nitrate content of 0.5 mol / L and an aluminum nitrate content of 0.2 mol / L for later use, according to the quality of the sodium hydroxide solution 10% of the weighted sodium nitrate was added to the container, and an equal volume of mixed salt solution and a sodium hydroxide solution with a concentration of 1.5mol / L were uniformly added dropwise to the container at the same time, and the dropping time was controlled at 30min. After the dropwise addition, adjust the pH value to 9.5, let it stand for 3 hours, and then move it to a constant temperature water bath at 80°C and continue stirring at 100r / min for 23 hours. After the reaction is complete, centrifuge and wash the p...

Embodiment 2

[0031] A processing technology for reducing deformation defects in the production of coal gangue hollow bricks, the specific technology is as follows:

[0032] 1) Weigh an appropriate amount of zinc nitrate and aluminum nitrate into distilled water, mix well to obtain a mixed salt solution with a zinc nitrate content of 0.55 mol / L and an aluminum nitrate content of 0.25 mol / L, for later use, according to the quality of the sodium hydroxide solution 13% of 1.7mol / L of sodium hydroxide solution, the sodium nitrate weighed is added to the container, and the same volume of mixed salt solution and the concentration of 1.7mol / L of sodium hydroxide solution are uniformly added dropwise to the container at the same time, and the dropping time is controlled at 35min. After the dropwise addition, adjust the pH value to 10, let it stand for 3.5 hours, then move it to a constant temperature water bath at 83°C and continue stirring at 130r / min for 25 hours. After the reaction is complete, c...

Embodiment 3

[0045] A processing technology for reducing deformation defects in the production of coal gangue hollow bricks, the specific technology is as follows:

[0046] 1) Weigh an appropriate amount of zinc nitrate and aluminum nitrate into distilled water, mix well to obtain a mixed salt solution with a zinc nitrate content of 0.6 mol / L and an aluminum nitrate content of 0.3 mol / L, for later use, according to the quality of the sodium hydroxide solution 15% of the 1.8mol / L sodium hydroxide solution, the sodium nitrate weighed is added to the container, and an equal volume of mixed salt solution and a sodium hydroxide solution with a concentration of 1.8mol / L are uniformly added dropwise to the container at the same time, and the dropping time is controlled at 40min. After the dropwise addition, adjust the pH value to 10.5, let it stand for 4 hours, then move it to a constant temperature water bath at 85°C and continue stirring at 160r / min for 26 hours. After the reaction is complete, ...

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Abstract

The invention discloses a processing technology for reducing deformation defects in coal gangue hollow brick production, and relates to the technical field of wall materials, and the processing technology comprises the following specific steps: 1), performing processing to prepare zinc-aluminum hydrotalcite; 2), preparing a zinc-aluminum hydrotalcite colloidal solution and a graphene oxide colloidal solution; 3), preparing a graphene oxide / zinc-aluminum hydrotalcite compound; and 4), crushing the raw materials of the coal gangue hollow brick, uniformly mixing the crushed raw materials with thegraphene oxide / zinc-aluminum hydrotalcite compound, adding an N, N-dimethyldiacridine nitrate solution, uniformly performing mixing to obtain a mixture, and performing processing. According to the preparation method, the N, N-dimethyldiacridine nitrate solution is used for wetting the green brick raw material, and the graphene oxide / zinc-aluminum hydrotalcite compound is introduced into the greenbrick, so that water can be quickly discharged from the green brick, the distribution uniformity of residual water in the green brick can be improved, and the green brick can be uniformly shrunk in the roasting process; therefore, the effect of reducing the deformation defect after the green brick is fired is achieved.

Description

technical field [0001] The invention belongs to the technical field of wall materials, and in particular relates to a processing technology for reducing deformation defects in the production of coal gangue hollow bricks. Background technique [0002] Coal gangue is solid waste discharged during coal mining and coal washing. It is a black rock with low carbon content and harder than coal associated with coal seams during the coal formation process. It is also a product of carbonaceous, muddy and sandy shale. mixture. According to the information, there are more than 5 billion tons of coal gangue piled up in my country over the years, and the annual new discharge of coal gangue is 300 million to 350 million tons. It is one of the main types of harmful solid waste in my country. [0003] Coal gangue piles up like a mountain, causing serious harm to the environment, ecology and people's life safety. The inorganic components of coal gangue are mainly oxides of silicon, aluminum...

Claims

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Application Information

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IPC IPC(8): C04B33/132C04B33/13
CPCC04B33/1305C04B33/131C04B33/132C04B33/1321C04B33/1324C04B2235/3217C04B2235/34C04B2235/36C04B2235/422C04B2235/425Y02P40/60
Inventor 丁玉龙
Owner 安徽滨江新型墙材有限公司
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