Burning-free geology polymer material of red mud coal ash and preparation method thereof

Abstract

The invention relates to a burning-free geology polymer material of red mud coal ash and a preparation method thereof, belonging to the technical field of recycling inorganic nonmetal material and industrial solid waste. Kawazu mud powder and coal ash are taken as main substrate raw materials, building fine sands and building crushed stones are taken as aggregate, solid water glass powder is taken as alkali activator to prepare the burning-free geology polymer material of red mud coal ash. The raw materials comprise the following components based on parts by weight percent: 5-98% of the kawazu mud powder, 1-65% of the coal ash, 1-96% of the building fine sands and the building crushed stones, and 1-20% of the solid water glass powder. Counting the red mud+the coal ash+the building fine sands and the building crushed stones as 100%, the raw materials further comprise the following components based on parts by weight percent: 5-45% of water and 0.1-10% of calcium lignosulphonate. The preparation method comprises the steps of: dosing, mixing, aging, shaping, maintaining and drying, etc. The invention has the advantages of the high use ratio of industrial solid waste, the less pollution, the low energy composition and the simple operation of the preparation technology, and embodies the important meanings of environment protection, energy conservation and emission reduction.

Description

Technical field: [0001] The invention relates to a red mud fly ash geological polymer material and a preparation method thereof, belonging to the technical field of recycling of inorganic non-metallic materials and industrial solid waste. Background technique: [0002] Red mud is the leaching residue after leaching bauxite with alkali in alumina production. With the continuous development of the scale of the domestic aluminum industry, my country's annual discharge of red mud is increasing, and the stockpiling of red mud will occupy land. If the red mud enters the soil with rainwater, it will cause salinization of the soil, and at the same time pollute the groundwater, which will have a certain impact on the ecological environment; the red mud piled in the open air will be scattered in the air with the wind in dry weather, which will cause air pollution and easily cause pollution. Sandy weather. Therefore, how to efficiently use red mud and reduce its environmental polluti...

AI Technical Summary

Problems solved by technology

[0004] At present, although there are research reports that the utilization rate of red mud and fly ash can be improved by producing red mud and fly ash sintered bricks, the demand for energy consumption in the production process is relatively high, which will increase the production in the sintering process. cost