Recycling method of aluminum ash

Abstract

The invention discloses a recycling method of aluminum ash. The recycling method includes: grinding industrial secondary aluminum ash for 0.5-5h, and sieving with a 40-mesh screen to obtain aluminum ash micropowder; well mixing, by weight, 25-65 parts of aluminum ash micropowder, 20-35 parts of SiO2, 10-30 parts of CaO, 4-12 parts of TiO2, 5-12 parts of MgO and 0-5 parts of colorant; and putting in a melting furnace for melting treatment to obtain melt after melting; pouring the melt into a die, cooling-molding to obtain a glassy-state block, and thermally treating the glassy-state block to obtain a microcrystalline glass material. By the recycling method, the microcrystalline glass material stable in structure can be made of the aluminum ash, so that the defect of being prone to generating toxic and harmful volatile matters when existing wet methods are used to extract useful ingredients in the aluminum ash is overcome effectively, and harmless treatment and recycling of the aluminumash are realized.

Description

technical field [0001] The invention relates to the technical field of aluminum ash treatment, in particular to a resource utilization method of aluminum ash. Background technique [0002] Aluminum products have important applications in aerospace, building materials, high-speed rail, automobiles and other fields. In recent years, the domestic aluminum industry has developed rapidly, but a large amount of solid hazardous waste aluminum ash will be produced in the process of aluminum smelting. The composition of the secondary aluminum ash is very complex, and the metal aluminum (3-9wt.%) is tiny aluminum particles mixed in the ash residue after frying ash. It is difficult to use chemical methods or physical methods under the premise of considering the recovery cost. The method realizes further recycling of resources. It has been determined that industrial secondary aluminum ash contains 3-9wt.% metal aluminum particles, 40-70wt.% alumina, 10-20wt.% NaCl, KCl and other solub...

AI Technical Summary

Problems solved by technology

The composition of the secondary aluminum ash is very complex, and the metal aluminum (3-9wt.%) is tiny aluminum particles mixed in the ash residue after frying ash. It is difficult to use chemical methods or physical methods under the premise of considering the recovery cost. Methods to realize further recycling of resources

Among them, metal aluminum particles, AlN, Al 4 C 3 Substances such as fluorocarbons are highly active, and will produce flammable and toxic gases when in contact with water or in humid air, which is highly environmentally harmful; fluorine-containing compounds and a small amount of heavy metals have leachable toxicity, which may cause serious pollution to water bodies and air; soluble salts It is also very easy to enter the river and cause environmental pollution; therefore, it is difficult to dispose of aluminum ash through traditional landfill methods, otherwise it will cause serious harm to the environment