Production method of red mud foamed building external wall insulation board

Abstract

The invention relates to a production method of a red mud foamed building external wall insulation board and effectively solves the problem of difficulty for recycling red mud. According to the technical scheme, the production method comprises the following steps: uniformly mixing 30-60 kg of preprocessed red mud, 10-20 kg of coal ash, 10-20 kg of ordinary portland cement with the strength grade of 42.5, 10-20 kg of unslaked lime, 1-2 kg of gypsum, 20-40 kg of shale, 10-20 kg of quartz, 6-12 kg of talcum, 2.5-5 kg of calcium stearate and 0.5-1 kg of sodium lignin sulfonate to form a first mixture, uniformly mixing 60-120 kg of water with the first mixture to form a second mixture, uniformly mixing 5-10 kg of hydrogen peroxide with the second mixture to form a third mixture, pouring the third mixture into a mould, shaping, demoulding for 24 hours, and curing for 3 days to form a blank body; drying the blank body in a drying kiln, roasting the blank body in a roasting kiln, and slowly cooling for 4-6 hours to room temperature so as to form a roasted blank body. The red mud foamed building external wall insulation board is light in weight, high in strength, good in heat preservation effect, low in construction cost and high in safety coefficient, and has good social and economic benefits.

Description

technical field [0001] The invention relates to building materials, in particular to a production method of red mud foamed building exterior wall insulation boards. Background technique [0002] With the continuous development of the alumina industry, the amount of waste slag-red mud produced in the production process has also increased significantly. Generally, 1 ton of alumina is produced on average, and 1.5 to 2 tons of red mud are incidentally produced. China is the fourth largest alumina producer in the world. In producing countries, tens of millions of tons of red mud are discharged every year. Red mud has high alkalinity, strong radioactivity, and serious environmental pollution. How to deal with red mud, reduce environmental pollution, realize waste utilization, and save resources are technical issues that people are concerned about. Contents of the invention [0003] In view of the above situation, in order to overcome the defects of the prior art, the object of ...

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Problems solved by technology

[0003] In view of the above situation, in order to overcome the defects of the prior art, the object of the present invention is to provide a production method of red mud foamed building exterior wall insulation board, which effectively solves the problem of large discharge of red mud, high alkalinity, strong radioactivity, and Severe environmental pollution and difficulty in recycling red mud