Process method for producing inorganic fiber from red mud

Abstract

The invention is a process for producing inorganic fibers using red mud as the main material, and belongs to the field of comprehensive utilization of red mud. A curing agent and an acidity coefficient regulator are added to the red mud, which is melted with coke at high temperature, and the red mud, curing agent, and acidity are fully utilized. Si, Ca, Fe, Al, Na, and Mg element resources in the coefficient regulator, use red mud as the main material to produce inorganic fibers, and the ratio of red mud can reach more than 70%, effectively control red mud pollution, and produce inorganic fibers Reaching the rock wool level, the economic benefits and social environmental protection benefits are remarkable. The process is simple, the production cost is low, and the large-scale production of comprehensive utilization of red mud can be realized.

Description

Technical field: [0001] The invention belongs to the field of comprehensive utilization of red mud, in particular to a process method for producing inorganic fibers by using red mud. Background technique [0002] Red mud is the residue produced after bauxite is extracted from alumina through the "Bayer method" or "sintering method". The amount of red mud produced is related to the production method and ore grade. Generally, 1-1.7 tons of slag will be produced for every ton of alumina produced. These slags are reddish brown because they are rich in iron oxide. They are called red mud and belong to Hazardous solid waste, the lower the grade of raw materials, the greater the amount of red mud produced. As the world's four largest alumina producers, China discharges tens of millions of tons of red mud every year. A large amount of red mud cannot be fully and effectively utilized. At present, the red mud treatment in the alumina plant is still piled up by building red mud dams....

AI Technical Summary

Problems solved by technology

Its technology needs to neutralize the red mud with acid, the process is complicated, and the production cost is high. Using acid as a neutralizing agent will produce harmful gases during the high-temperature melting process, which has a certain impact on the environment.

At the same time, the inorganic fibers produced can only barely meet the technical indicators of "mineral wool", but cannot meet the national technical standards of "rock wool", especially the indicator of "acidity coefficient"

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