Method for preparing sintered brick from final aluminum ash

Abstract

The invention discloses a method for preparing a sintered brick from final aluminum ash, and belongs to the technical field of environmental protection. The method comprises the steps: firstly, mixing final aluminum ash, engineering soil and coal gangue to obtain a brick making raw material, mixing the brick making raw material and a nitrogen removal additive, adding water, uniformly stirring, aging, taking out the aged raw material, putting into a mold, carrying out compression molding to obtain a green brick, and roasting to obtain the sintered brick. On one hand, the preparation process of a common sintered brick is simplified, and the same strength requirement can be met; on the other hand, the final aluminum ash serves as the raw material of the sintered brick, the engineering soil and the coal gangue are supplemented, and industrial waste and capital construction waste are comprehensively utilized.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a method for preparing sintered bricks from aluminum ash final ash. Background technique [0002] According to relevant technical statistics, 1 ton of aluminum will produce about 30-250kg of aluminum ash slag during the entire production process. From January to November 2020, China's primary aluminum output was 34.15 million tons, an increase of 4.27% over the same period last year. It accounts for more than 50% of the world's primary aluminum production. According to incomplete statistics, the current stockpile of aluminum ash in China has exceeded 100 million tons, and it is expected that more than 5 million tons of aluminum ash will be added every year. These aluminum ash slags not only pollute the air and affect the quality of water sources, but also damage the soil and destroy farmland to a certain extent. Therefore, there is an urgent need to...

AI Technical Summary

Problems solved by technology

The patent uses a variety of solid waste raw materials to prepare sintered bricks, which increases the complexity of the brick-making process, and uses clay as a raw material, which will aggravate the degree of environmental damage

In addition, due to the large composition of raw materials, it will virtually limit the large-scale utilization of this fired brick

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