Method for preparing high-alumina refractory material from aluminum ash
A refractory material and high-alumina technology, which is applied in the field of resource utilization of non-ferrous solid waste, can solve the problem that secondary aluminum ash cannot be utilized in a high-value manner
Inactive Publication Date: 2020-12-22
SOUTHWEAT UNIV OF SCI & TECH
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[0005] The aluminum ash used in this patent is the secondary aluminum ash after the primary aluminum ash extracts metal aluminum. In view of the problems that the secondary aluminum ash cannot be used at a high value, this patent provides a method for preparing high-alumina refractory materials from aluminum ash, which promotes the production of aluminum ash high value utilization
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[0019] The present invention will be described in further detail below in conjunction with specific examples.
[0020] Wash the aluminum ash with water to remove soluble salts, filter and dry to obtain filter residue; add concentrated sulfuric acid to the filter residue, stir evenly in a physical field mixer, filter, and wash to obtain purified residue; shape and sinter the purified residue to obtain high Aluminum refractory material. Concentrated sulfuric acid concentration, physical field agitator configuration and grinding media, and sintering temperature are shown in Table 1.
[0021] Table 1
[0022]
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The invention discloses a method for preparing a high-alumina refractory material from aluminum ash. The method is characterized by comprising the following steps: washing aluminum ash with water to remove soluble salt, and carrying out filtering and drying to obtain filter residues; adding concentrated sulfuric acid into the filter residues, carrying out uniform stirring in a physical field stirrer, and performing filtering and washing to obtain purified residues; and molding and sintering the purified residues to obtain the high-alumina refractory material. The method is low in production cost and high in efficiency, and high-quality cyclic utilization of resources is achieved.
Description
technical field [0001] The invention relates to the field of resource utilization of colored solid waste, in particular to the resource utilization of aluminum ash, and the high-alumina refractory material prepared by the aluminum ash can be used in industrial kilns. Background technique [0002] Aluminum ash is a product of the aluminum melting and casting process. According to the raw materials used in aluminum melting and casting and the production purpose, the composition and content of aluminum ash will be quite different. The aluminum ash produced by electrolytic aluminum liquid to produce remelted aluminum ingots accounts for about 1.1% of the ingot output. The composition is relatively simple and stable, mainly composed of metal aluminum, alumina, aluminum nitride, chloride salt (sodium chloride , potassium chloride) and electrolytes (sodium fluoride, calcium fluoride, cryolite, etc.), of which aluminum accounts for about 40%-50%, and alumina accounts for about 30%-...
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IPC IPC(8): C04B35/66C04B33/138
CPCC04B35/66C04B33/138Y02P40/60
Inventor 谭宏斌马小玲董发勤杨飞华李玉香张吉秀李芳王进明邓秋林王进贺小春
Owner SOUTHWEAT UNIV OF SCI & TECH