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
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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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