Method for producing stone block based on bayer red mud

Abstract

The invention discloses a method for producing a stone block based on bayer red mud. The method comprises the steps of performing grinding and pulping, compounding and blank forming, drying sintering and cooling, conveying a sintered green body to a cooling area of a tunnel kiln to perform gradual type cooling to below 80 DEG C, and obtaining man-made volcano stone block. According to the method, a raw material ratio mode of mixing the bayer red mud and low-proportion clay is adopted to manufacture an ultra-thin stone plate low in volume weight, the transportation cost can be greatly reduced, and thus the comprehensive utilization and development of bayer red mud tailings are greatly improved. Besides, graphene oxide is further added into the mixture, so that oxygen-containing functional groups on the mixture are increased to make the property more active than that of graphene, and the property of the stone block is improved through various reactions with the oxygen-containing functional groups.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a method for producing stone blocks based on Bayer red mud. Background technique [0002] Red mud is the polluting waste slag discharged when the aluminum industry extracts alumina, generally producing 1 ton of alumina on average. Also known as red mud, it is an industrial solid waste discharged after refining alumina from bauxite. Generally, it contains a large amount of iron oxide, and its appearance is similar to red soil, hence the name. But some are brown or even off-white because they contain less iron oxide. At present, the world discharges about 60 million tons of red mud every year. Most of the red mud can only be stored by damming and intercepting. The storage of red mud not only takes up a lot of land, but also easily causes land alkalization and water system pollution. At the same time, it is also a waste of resources, which seriously hinders the sustain...

AI Technical Summary

Problems solved by technology

At present, the world discharges about 60 million tons of red mud every year. Most of the red mud can only be stored by damming and intercepting. The storage of red mud not only takes up a lot of land, but also easily causes land alkalization and water pollution. At the same time, it is also a waste of resources, which seriously hinders the sustainable development of the aluminum industry.