Method for preparing alumina ceramic filter plate based on aluminum ash
An alumina ceramic and filter plate technology, which is applied in chemical instruments and methods, separation methods, filtration and separation, etc., can solve the problems of high resource consumption, high production cost, and difficulty in meeting demand for ceramic filter plates, and save natural resources. , The effect of less fuel consumption and lower production costs
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Embodiment 1
[0025] Example 1: Method for preparing alumina ceramic filter plate based on aluminum ash
[0026] Take 40 parts of aluminum ash (containing Al 5%, AlN 8%, Al 2 O 3 82%, SiO 2 0.5%, MgO 0.5%, CaO 0.5%, Fe 2 O 3 0.3%, the rest are chlorine salt and fluoride salt impurities), 60 parts of alumina (purity 99%) are mixed evenly, plus 3 parts of aluminum hydroxide binder, 1 part of aluminum fluoride, the above powder and water according to 1: Mixed with a weight ratio of 1, wet-milled to 325 mesh in a ceramic ball mill to make a slurry.
[0027] Take a 30PPI polyurethane foam board and immerse it in the above slurry. After the slurry is evenly infiltrated, take out the polyurethane foam board and squeeze out the excess slurry; let the polyurethane foam board blank soaked in the slurry naturally dry for 24 hours, and then dry at 150 °C 12h.
[0028] Then sinter at 1450°C. The specific heating system is as follows: the heating rate is 30°C / h in the 0-300°C stage, 20°C / h in the...
Embodiment 2
[0030] Example 2: Method for preparing alumina ceramic filter plate based on aluminum ash
[0031] Take 90 parts of aluminum ash (containing Al 3%, AlN 5%, Al 2 O 3 85%, SiO 2 0.3%, MgO 0.5%, CaO 0.3%, Fe 2 O 3 0.3%, the rest are chlorine salt and fluoride salt impurities), 10 parts of alumina (alumina purity 99%) are mixed evenly, plus 3 parts of aluminum hydroxide binder, 3.5 parts of aluminum fluoride, the above powder and water according to Mixed in a ratio of 4:1, wet-milled to 325 mesh with a ceramic ball mill to make a slurry.
[0032] Take a 40PPI polyurethane foam board and immerse it in the above slurry; after the slurry is evenly saturated, take out the polyurethane foam board and squeeze out the excess slurry; air the polyurethane foam board blank with the slurry naturally for 24 hours, and then dry it at 150 ℃ for 12 hours .
[0033] Then sinter at 1550°C, the specific heating curve is: 0-300°C, 30°C / h, 300-550°C, 20°C / h, 550-1000°C, 5°C / h, oxygen content ...
Embodiment 3
[0035] Example 3: Method for preparing alumina ceramic filter plate based on aluminum ash
[0036] Take 50 parts of aluminum ash (including Al 4%, AlN 9%, Al 2 O 3 81%, SiO 2 0.3%, MgO 0.5%, CaO 0.3%, Fe 2 O 3 0.3%, the rest are chlorine salt and fluoride salt impurities), 50 parts of alumina (alumina purity ≥ 99%) are mixed evenly, plus 5 parts of aluminum hydroxide binder, 2.5 parts of aluminum fluoride, the above powder and water Mixed according to the ratio of 3:2, wet-milled to 325 mesh with a ceramic ball mill to make slurry;
[0037] Take a polyurethane foam board with a density of 60 PPI and immerse it in the above slurry; after the slurry is evenly infiltrated, take out the polyurethane foam board and squeeze out the excess slurry;
[0038] Dry the polyurethane foam board blank with the slurry naturally for 24 hours, and then dry it at 150°C for 12 hours;
[0039] Then sinter at 1650°C, the specific heating steps are: 0-300°C, 30°C / h, 300-550°C, 20°C / h, 550-1...
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