A kind of unburned red mud brick and its preparation method

Abstract

The invention relates to the technical field of unburned bricks, in particular to a red mud unburned brick and a preparation method thereof. The unburned bricks, measured in parts by mass, include: 30-40 parts of red mud, sulfoaluminate cement clinker Or 25-30 parts of aluminate cement mixed with 5-15% gypsum, 20-30 parts of steel slag, 10-15 parts of silica fume, and 5-10 parts of strontium slag. The non-burning brick prepared by the invention can achieve the purpose of inhibiting efflorescence, heavy metal solidification and reducing radioactivity, and the prepared red mud non-burning brick has good mechanical properties.

Description

technical field [0001] The invention relates to the technical field of burn-free bricks, in particular to a red mud burn-free brick and a preparation method thereof. Background technique [0002] With the development of the modern aluminum industry, the production scale of the alumina industry is expanding day by day, and the waste slag produced in the process of producing alumina has become an important environmental pollutant. Red mud is a kind of insoluble residue in the process of refining alumina from bauxite, and it is a waste mud composed of fine particles and coarse particles. As my country pays more and more attention to the environment and resources, unburned bricks will replace fired bricks and become the mainstream of wall materials, which is an irreversible trend. [0003] Because the red mud is the highly alkaline residue after the Bayer process of processing bauxite to refine alumina, it contains a large amount of soluble alkali and heavy metals, and the radi...

AI Technical Summary

Problems solved by technology

[0003] Because the red mud is the highly alkaline residue after the Bayer process of processing bauxite to refine alumina, it contains a large amount of soluble alkali and heavy metals, and the radioactivity of some red mud exceeds the standard. The strength of the bricks will be reduced, the heavy metals will be dissolved out of the standard, which will pollute the environment, and the radioactivity will exceed the standard, which will affect human health.

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