Ultrahigh-strength red mud light material and preparation method thereof

Abstract

The invention relates to an ultrahigh-strength red mud light material and a preparation method thereof, and the method comprises the following steps: crushing and ball-milling red mud, uniformly mixing red mud micro powder, slag micro powder, fly ash and slaked lime powder, and adding sodium hydroxide and liquid sodium silicate. The purpose of light weight by using ultrahigh-strength water absorption of red mud particles and adopting an ultrahigh liquid-solid ratio mode is achieved, meanwhile, through the interaction among the red mud micro powder, the slag micro powder, the fly ash and the slaked lime powder, the polymerization reaction activity among the materials is fully exerted, so that preparation of the ultrahigh-strength red mud light material is realized. The red mud light material is prepared by taking red mud as a main raw material, resource recycling of wastes is realized, and meanwhile, the red mud light material has the characteristics of low preparation cost and ultrahigh mechanical properties.

Description

technical field [0001] The invention relates to a super-high-strength red mud lightweight material and a preparation method. Background technique [0002] Red mud, also known as red mud, is the insoluble powdery mud-like waste left after alumina is extracted from bauxite. It is a strongly alkaline and harmful waste residue with high moisture content and complex composition and properties. Chemicals, so it is a hazardous waste residue. The red mud attached liquid contains 2-3g / L alkali, and the pH value can reach 12-14. The pollution to the environment is mainly caused by alkali pollution. At present, China discharges more than 30 million tons of red mud every year, and it is increasing year by year. The dumping of red mud not only takes up a lot of land, but also consumes a lot of manpower and material resources, and will also pollute the air environment and groundwater. Therefore, the large-scale harmless treatment of red mud, safe consumption and resource recycling has b...

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Problems solved by technology

At present, China discharges more than 30 million tons of red mud every year, and it is increasing year by year. The dumping of red mud not only takes up a lot of land, but also consumes a lot of manpower and material resources, and will also pollute the air environment and groundwater.

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