Red-mud non-fired non-steamed paving brick and preparation method thereof

Abstract

The invention discloses a red-mud non-fired non-steamed paving brick and a preparation method thereof. The red-mud non-fired non-steamed paving brick is prepared by raw materials: by weight, 30-65 parts of red mud, 0-30 parts of coal ash, 2-25 parts of cement, 12-20 parts of aggregate and 1-5 parts of modifier. The red-mud non-fired non-steamed paving brick has the advantages that the raw materials are mixed with a large quantity of industrial slag, and the problem that the industrial slag is difficult to be disposed is effectively solved, 2, the modifier is mixed, and the problem of return frosting of a non-fired red-mud product is effectively solved, and 3, a small amount of cement is introduced, accordingly, total mixture of the industrial slag such as the red mud, the coal ash and thelike in the non-fired non-steamed paving brick is higher than 60%, a large amount of industrial slag can be consumed, cost is low, and energy consumption is saved. Various indexes of the produced red-mud non-fired non-steamed paving brick can achieve and meet specified national standards of paving bricks.

Description

technical field [0001] The invention relates to a red mud non-burning and non-steaming pavement brick and a preparation method thereof, belonging to the technical field of red mud utilization. Background technique [0002] Red mud is the waste produced during the process of extracting alumina from bauxite. It is named for its red mud shape and is the largest source of pollution in alumina plants. At present, the world produces about 60 million tons of red mud every year, and the discharge of red mud in my country is more than 4 million tons per year. With the commissioning of new plants and the increase and transformation of old plants, the total amount of red mud is on the rise. It is estimated that in 2010 my country's alumina output will reach 10 million tons, and the amount of red mud will reach 7-10 million tons per year. For the treatment of red mud, most alumina factories at home and abroad stack the red mud in the storage yard, build dams for wet storage, and rely on...

AI Technical Summary

Problems solved by technology

[0003] The development and utilization of red mud has always been a worldwide problem, especially because the silicon content of Bayer red mud is lower than that of sintering red mud, the chemical cost is extremely unbalanced, and its utilization is more difficult; High alkali metal and alkaline earth metal oxides, it is difficult to avoid frosting when preparing non-fired products, which makes the products unusable; in addition, red mud in some areas has high radioactivity, which limits the use of wall materials. Dosage, but also limit its application in the building materials industry

Therefore, the utilization of red mud in the prior art is still very low, and the development and utilization of red mud is still not ideal.

Images