Calcium hexaluminate prepared by aid of anodic oxidation waste residues of aluminum section factory and method for preparing calcium hexaluminate

An anodizing and aluminum profile factory technology, applied in the field of calcium hexaaluminate and its preparation, to achieve the effect of low raw material cost, large surface area and high activity

Inactive Publication Date: 2012-07-25
FUZHOU UNIVERSITY
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  • Description
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Problems solved by technology

[0003] After searching, there is no report on the preparation of calcium hexaaluminate material by using the anodic oxidation waste residue of aluminum profile factory at home and abroad. This project belongs to the first technology researched and invented at home and abroad.

Method used

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  • Calcium hexaluminate prepared by aid of anodic oxidation waste residues of aluminum section factory and method for preparing calcium hexaluminate
  • Calcium hexaluminate prepared by aid of anodic oxidation waste residues of aluminum section factory and method for preparing calcium hexaluminate

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preparation example Construction

[0019] The specific steps of the preparation method of the calcium hexaaluminate material prepared from the anodic oxidation waste residue of the aluminum profile factory are as follows:

[0020] 1) According to the formula, put the anodic oxidation waste residue and limestone in the aluminum profile factory into a ball mill for 12 hours, and the ground slurry is filtered and dehydrated, dried at 100°C and crushed to obtain a total material of less than 30 mesh;

[0021] 2) Add the binder PVA, mix evenly in the mixer, trap the material for 12 hours, and press the mixture into shape;

[0022] 3) The molded sample was dried at 100°C for 12 hours;

[0023] 4) The sample is placed in a kiln for reaction sintering, the reaction sintering temperature is 1400-1600°C, the reaction sintering holding time is 2-5 hours, and the furnace is cooled to room temperature to obtain high-purity calcium hexaaluminate material.

Embodiment 1

[0025] The weight ratio of the raw material formula in this example is: 78wt% of the anodic oxidation waste residue of the aluminum profile factory, and 22wt% of the limestone. Weigh the two raw materials according to the formula, place them in a ball mill and grind them for 12 hours. The ground slurry is filtered and dehydrated, dried and crushed at 100°C to obtain a total material of less than 30 meshes; add binder PVA and mix evenly in a mixer , the material was trapped for 12 hours, and the mixed material was pressed into shape; the formed sample was dried at 100°C for 12 hours; the sample was placed in a kiln for reaction sintering, the reaction sintering temperature was 1400°C, the holding time was 5 hours, and the furnace was cooled to At room temperature, the obtained calcium hexaaluminate material contains CA 6 (CaAl 12 o 19 ): 85%, CA 2 (CaAl 4 o 7 ): 6.6%, Al 2 o 3 :8.4% (mass ratio, the same below).

Embodiment 2

[0027] The weight ratio of the raw material formula in this example is: 78wt% of the anodic oxidation waste residue of the aluminum profile factory, and 22wt% of the limestone. Weigh the two raw materials according to the formula, place them in a ball mill and grind them for 12 hours. The ground slurry is filtered and dehydrated, dried and crushed at 100°C to obtain a total material of less than 30 meshes; add binder PVA and mix evenly in a mixer , the material was trapped for 12 hours, and the mixed material was pressed into shape; the formed sample was dried at 100°C for 12 hours; the sample was placed in a kiln for reaction sintering, the reaction sintering temperature was 1500°C, the holding time was 4 hours, and the furnace was cooled to At room temperature, the obtained calcium hexaaluminate material contains CA 6 (CaAl 12 o 19 ): 88%, CA 2 (CaAl 4 o 7 ):5.1%, Al 2 o 3 :6.9%.

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Abstract

The invention provides a calcium hexaluminate prepared by the aid of anodic oxidation waste residues of an aluminum section factory and a method for preparing the calcium hexaluminate. The method includes adopting anodic oxidation waste residues of the aluminum section factory and limestone as raw materials; mixing the raw materials; pressing and forming; and preparing a calcium hexaluminate material via high-temperature reaction. The calcium hexaluminate and the method belong to comprehensive utilization of solid waste, the problem of severe environmental pollution of the anodic oxidation waste residues of the aluminum section factory is solved, production cost is saved, an economical benefit is remarkable, and the calcium hexaluminate and the method have popularization and application values.

Description

technical field [0001] The invention relates to an ecological environment material, that is, the comprehensive utilization of solid waste, and more specifically relates to calcium hexaaluminate prepared from anodic oxidation waste residue of an aluminum profile factory and a preparation method thereof. Background technique [0002] The process of surface treatment of aluminum profiles by anodic oxidation method includes pickling, alkali washing and anodic oxidation. In each process, a large amount of milky white aluminum-containing colloidal waste liquid will be produced. The main component of this waste liquid is aluminum-containing substances. Colloidal, high dispersion. In order to avoid environmental pollution caused by the direct discharge of this waste liquid, a large amount of aluminum-containing substances in the waste liquid must be precipitated and removed by filtration to obtain waste residue. The output of this kind of waste slag is very high. Taking a medium-si...

Claims

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Application Information

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IPC IPC(8): C01F7/16
Inventor 于岩王键郑跃国谢继玲
Owner FUZHOU UNIVERSITY
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