Method for reusing waste aluminum ash in refractory material

Abstract

The invention relates to a method for reusing waste aluminum ash in a refractory material, which comprises the following steps of: collecting leftovers left in the production and processing process of an aluminum factory, grinding the leftovers, screening and classifying the ground leftovers, extracting metal aluminum and aluminum oxide from the leftovers, crushing the aluminum ash left after extraction, and sieving the crushed aluminum ash to obtain the product. According to the method, the crushed aluminum ash is pressed into blocks by a mechanical press, the block-shaped aluminum ash is put into a tunnel kiln to be calcined at high temperature to 1500 DEG C, low-melt substances are burnt out by high temperature in the kiln in the firing process, and alpha-aluminum oxide is obtained after firing is completed, so that wastes are effectively utilized, resource waste is reduced, and the environment is protected.

Description

Technical Field

[0001] The invention relates to a method for reusing waste aluminum ash slag into refractory materials. Background Art

[0002] At present, with the continuous improvement of environmental protection requirements and the further needs of social development, as well as the decreasing natural resources, the recycling of waste resources has become more important, especially in the refractory industry, where there is an urgent need. Summary of the invention

[0003] In order to overcome the existing situation, with the continuous improvement of environmental protection requirements and the further needs of social development, as well as the decreasing natural resources, the recycling of waste resources has become more important, especially in the refractory industry where there is an urgent need. The present invention provides a method for recycling waste aluminum ash slag in refractory materials. The method can be used to extract the waste generated in the production process of aluminum products production and processing industry to obtain metallic aluminum and aluminum oxide, and then the aluminum ash slag remaining after the extraction is processed and calcined to obtain α-alumina urgently needed in the refractory industry.

[0004] The technical solution adopted by the present invention to solve its technical problem is: first, the scraps remaining in the production and processing process of the aluminum plant are collected together, and then the scraps are ground, and then the ground scraps are screened and classified to extract metallic aluminum and aluminum oxide, and then the aluminum ash slag remaining after the extraction is crushed, and the crushed aluminum ash slag is pressed into blocks by a mechanical press, and these blocks of aluminum ash slag are loaded into a tunnel kiln for high-temperature calcination, so that the temperature in the kiln reaches 1500°C. During the firing process, low-melting materials are burned by the high temperature in the kiln. After the firing is completed, α-alumina is obtained.

[0005] The beneficial effect of the present invention is that the method can be used to extract the waste generated in the production process of the aluminum product production and processing industry, thereby obtaining α-alumina urgently needed by the refractory material industry, saving resources, reducing costs and protecting the environment. DETAILED DESCRIPTION

[0006] First, the scraps left over from the production and processing of the aluminum plant are collected together, then ground, screened and classified, and metallic aluminum and alumina are extracted from them. The aluminum ash slag remaining after the extraction is crushed, and the crushed aluminum ash slag is pressed into blocks with a mechanical press. These blocks of aluminum ash slag are loaded into a tunnel kiln for high-temperature calcination, and the kiln is burned to 1500℃. During the firing process, low-melting materials are burned by the high temperature in the kiln. After the firing is completed, α-alumina is obtained, which makes effective use of waste, reduces production costs, reduces resource waste, and protects the environment.

Claims

1. A method for recycling waste aluminum ash slag into refractory materials, characterized by: First, the scraps left over from the production and processing of the aluminum plant are collected together, then ground, and then screened and classified to extract metallic aluminum and alumina.

2. The method for recycling waste aluminum ash slag into refractory materials according to claim 1, characterized in that: The aluminum ash slag left after extraction is crushed and pressed into blocks by a mechanical press. These blocks of aluminum ash slag are loaded into a tunnel kiln for high-temperature calcination. The kiln is burned to 1500°C. During the firing process, the low-melting materials are burned by the high temperature in the kiln. After the firing is completed, α-alumina is obtained.