Semi-internal combustion type red mud sintered brick and production process and application

Abstract

The invention provides a semi-internal combustion type red mud sintered brick and a production process and application thereof, and relates to the technical field of building materials, the semi-internal combustion type red mud sintered brick comprises the following components in parts by mass: 20-60 parts of Bayer process red mud, 5-15 parts of plastic clay, 15-20 parts of coal gangue, 10-40 parts of aggregate, 5-10 parts of a fluxing agent, 3-10 parts of a binder and 1-5 parts of a radioactivity shielding agent, wherein the sum of the parts by weight of the components is 100. According to the semi-internal combustion type red mud sintered brick provided by the invention, the doping amount of Bayer process red mud is greatly increased, through the synergistic cooperation of the components, the compressive strength reaches the MU30 standard, the problems of heavy metal dissolution pollution risk, scumming and the like are avoided in the use process, the radioactivity level is also greatly reduced, the national building main body material standard can be met, meanwhile, coal gangue is added into the raw materials, internal combustion and external combustion can be achieved in the production process, roasting energy consumption is remarkably reduced, and the production cost is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a semi-internal combustion red mud sintered brick and its production process and application. Background technique [0002] As a solid waste discharged from the alumina industry, red mud has a huge stockpile in my country. It contains a large amount of alkaline substances, a small amount of heavy metal elements and trace radioactive nuclides. If it is not disposed of properly, it will easily pollute the environment. At present, the comprehensive utilization rate of red mud in my country is 4%, which is far lower than the world average utilization rate of 15%. Realizing the large-scale comprehensive utilization of red mud is an urgent problem to be solved. [0003] Utilizing red mud to prepare sintered bricks is one of the ways to effectively consume red mud at present, but because of various harmful substances in red mud, the amount of red mud in most red mud sintered ...

AI Technical Summary

Problems solved by technology

[0005] One of the objectives of the present invention is to provide a semi-internal combustion red mud sintered brick to improve the technical problems of the existing sintered bricks that increase the amount of red mud that will lead to the dissolution of heavy metals and increase the level of emissivity

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