1. Background technology
Plasma is a solid sludge released during aluminium oxide production and is classified into sintering, bayer-based and commingled sludge according to the aluminium oxide production process. Due to the different methods of aluminium oxide production and the quality of bauxite, the chemical composition, physical properties and minerals of the masonry are different, but because of the high iron oxide content, its skin colour is similar to that of the red soil, which is generally referred to as leukemia. The common properties of both sintering and beryllium are alkaline and the difficulty of using it because of its presence is the main reason for its low utilization。
Our country is the world's fourth largest producer of aluminium oxide, producing approximately 1. 5 tons of blubber (cracked) per ton of aluminium oxide and 3-4 m3 of alkaline waste per ton of dry blubber. It is not entirely estimated that our country annually emits more than 10 million tons of mud, the accumulated stock of which amounts to tens of thousands of tons, mainly based on dam-wetting, with a utilization rate of only about 10 per cent. As the aluminium industry develops and the level of aluminium ore is reduced, the resulting environmental problems have become a major constraint to the sustainable development of enterprises. Given our national circumstances, the aluminium industry will remain dynamic for some time to come, but if the problems of pollution from mud, land occupation and waste of resources are not effectively addressed, the sustainable development of the aluminium industry will be seriously affected. For this large volume of solid waste to be widely used, it is necessary to first address the stabilization of leachate and its integrated use technologies, a major issue that has long plagued the domestic and international aluminium oxide industry but remains unresolved。
2. Content of inventions
The purpose of this invention is to mitigate the environmental pollution caused by the treatment of the sludge and magnesium slag, using the main raw materials, industrial sludge as a bone, and the production of new energy-efficient and environmentally friendly building materials using repressive formation techniques, while combining the use of the slag and magnesium slag。
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