Production process of red mud and coal gangue baked brick

Abstract

The invention provides a production process of a red mud and coal gangue baked brick, and relates to a process method for manufacturing construction bricks by utilizing harmful waste residues red mud and coal gangue. The production process is characterized in that: red mud and coal gangue serving as raw materials are prepared in a certain percentage; and the preparation process flow comprises the steps of preparing; crushing and screening; stirring with water; aging; forming; drying; preheating; baking; cooling; and soaking with water. The production process has the advantages that: each index of the baked brick by utilizing red mud and coal gangue achieves the standard of first class of fired common brick. According to the production process, the problem of large-scale comprehensive utilization of red mud is solved, the problem of comprehensive utilization of coal gangue is solved, and excellent economical benefit can be created to achieve win-win of environmental protection and social benefit.

Description

technical field [0001] The invention relates to a process for making building bricks by using harmful waste residues, red mud and coal gangue. Background technique [0002] Red mud is a solid powdery waste produced in the production process of alumina industry. Because of its high pH value and fluoride content, it is a hazardous waste residue. In our country, the cumulative storage of red mud is as high as tens of millions of tons. The storage of red mud not only occupies a large amount of land and farmland, but also consumes more yard construction and maintenance costs, and the pollutants such as fluoride and alkali in red mud are Under the immersion and leaching action of rainwater and gray water, a large amount of leaching will be dissolved, and it will infiltrate into the aquifer through the vadose zone, thereby polluting groundwater and affecting the ecological environment and human health. In addition, the dust formed by the dried red mud is flying everywhere, des...

AI Technical Summary

Problems solved by technology

In our country, the cumulative storage of red mud is as high as tens of millions of tons. The storage of red mud not only occupies a large amount of land and farmland, but also consumes more yard construction and maintenance costs, and the pollutants such as fluoride and alkali in red mud are Under the immersion and leaching action of rainwater and gray water, a large amount of water will be dissolved, and it will infiltrate into the aquifer through the vadose zone, thereby polluting the groundwater and affecting the ecological environment and human health.

In addition, the dust formed by the dried red mud is flying everywhere, destroying the ecological environment and causing air pollution