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Anti-oxidation treatment method of graphite heating element used in zirconium tetrachloride production
The invention relates to an anti-oxidation treatment method of a graphite heating element used in zirconium tetrachloride production. The method comprises the following steps: 1, according to weight percentages, 45-55% of aluminum dihydrogen phosphate, 9-11% of kaolin, 9-11% of graphite powder, 18-22% of silica sol and 9-11% of silicon dioxide are mixed, such that an antioxidant is prepared for later use, wherein the graphite powder has a particle size of no less than 300 mesh and a carbon content no lower than 99.9%, the particle size of kaolin is no less than 700 mesh and the particle size of silicon dioxide is no less than 300 mesh; 2, a graphite heating element is placed into a pressure container; vacuuming is carried out until a vacuum degree is below -1MPa, wherein the treatment time is 1-2h; 3, the pressure container is filled with the antioxidant; the pressure is increased to 10-12MPa, and the graphite heating element is fetched after 5h; 4, the fetched graphite heating element is placed into a drying furnace, and is heated to 750-850 DEG C, such that high-temperature roasting and drying treatment are carried out; and 5, the graphite heating element is fetched after 24h, and is polished. With the method, the service life of the graphite heating element can be prolonged, production cost can be saved, and production capacity can be improved.
Anti-oxidation treatment method of graphite heating element used in zirconium tetrachloride production
The invention relates to an anti-oxidation treatment method of a graphite heating element used in zirconium tetrachloride production. The method comprises the following steps: 1, according to weight percentages, 45-55% of aluminum dihydrogen phosphate, 9-11% of kaolin, 9-11% of graphite powder, 18-22% of silica sol and 9-11% of silicon dioxide are mixed, such that an antioxidant is prepared for later use, wherein the graphite powder has a particle size of no less than 300 mesh and a carbon content no lower than 99.9%, the particle size of kaolin is no less than 700 mesh and the particle size of silicon dioxide is no less than 300 mesh; 2, a graphite heating element is placed into a pressure container; vacuuming is carried out until a vacuum degree is below -1MPa, wherein the treatment time is 1-2h; 3, the pressure container is filled with the antioxidant; the pressure is increased to 10-12MPa, and the graphite heating element is fetched after 5h; 4, the fetched graphite heating element is placed into a drying furnace, and is heated to 750-850 DEG C, such that high-temperature roasting and drying treatment are carried out; and 5, the graphite heating element is fetched after 24h, and is polished. With the method, the service life of the graphite heating element can be prolonged, production cost can be saved, and production capacity can be improved.
Anti-oxidation treatment method of graphite heating element used in zirconium tetrachloride production
ZHU FENGRONG (author)
2015-04-22
Patent
Electronic Resource
English
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