Method for preparing anti-corrosion and wear-resistant coating by using secondary aluminum ash as raw material

Abstract

The invention provides a method for preparing an anti-corrosion and wear-resistant coating by utilizing secondary aluminum ash, and particularly relates to the technical field of treatment by utilizing the secondary aluminum ash, the method comprises the following steps: firstly, adding the secondary aluminum ash into water to prepare a mixed solution; filtering the mixed solution to obtain filter residues, and washing and drying the filter residues to obtain secondary aluminum ash pretreatment powder; adding the secondary aluminum ash pretreatment powder and silicon carbide into a planetary ball mill for ball milling to obtain mixed fine powder; then putting the mixed fine powder, high chlorinated polyethylene resin, an organic solvent and deionized water into a stirring kettle to be mixed and stirred to prepare pug; and adding the anti-corrosion pigment and the auxiliary agent into the stirring kettle, stirring until the mixture is viscous, and adding the inorganic flame retardant to obtain the anti-corrosion and wear-resistant coating. According to the invention, efficient recycling of the secondary aluminum ash is realized, the production cost is relatively low, the production process is simple, and the prepared anti-corrosion and wear-resistant coating has excellent performance.

Description

technical field [0001] The invention belongs to the technical field of secondary aluminum ash treatment, and in particular relates to a method for preparing an anti-corrosion and wear-resistant coating by using secondary aluminum ash as a raw material. Background technique [0002] Secondary aluminum ash is the product of the slag produced in the production process of electrolytic aluminum or cast aluminum after cooling and processing. It is a recyclable resource. Generally, 30-50Kg of secondary aluminum slag is produced for every ton of aluminum produced. The composition is Al, Al 2 O 3 , Fe, SiO 2 , nitrides, metal oxides, etc., among which Al and Al are the most abundant 2 O 3 Up to 10-80wt%. [0003] At present, the treatment of secondary aluminum ash in my country mainly adopts the methods of stacking and roadbed landfill, which not only occupies a lot of land, but also wastes precious aluminum resources, which does not match the national conditions of my country's...

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Problems solved by technology

[0003] At present, the treatment of secondary aluminum ash in my country mainly adopts stacking and roadbed landfill, which not only occupies a large amount of land, but also wastes precious aluminum resources, which does not match the national conditions of my country's lack of aluminum ore resources. At the same time, the secondary aluminum ash is placed for a long time In the air or in contact with water, a large amount of flammable and toxic gases will be produced, causing serious air and water pollution, which is not in line with the national green development policy

There are also related studies that propose that the secondary aluminum ash is purified and chemically reacted to prepare chemical products such as polyaluminum chloride flocculant, aluminum sulfate, and basic aluminum chloride. However, due to high purification requirements and complicated preparation processes, the utilization rate and added value It is difficult to meet the development needs of enterprises, and related industries have not been effectively promoted

[0004] It is another relatively simple utilization technology to directly apply the secondary aluminum ash to the preparation of anti-corrosion and wear-resistant coatings after detoxification. At present, the widely used wear-resistant coatings are mainly resin-based coating systems, which have strong adhesion and wear resistance. It has the characteristics of excellent performance, but it also has the disadvantages of low operating temperature and high cost, which limit the application range of wear-resistant coatings

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