Method for Anti-hydrogen Fluoride Corrosion of Glass in Aluminum Electrolysis Industry

Abstract

The invention discloses a method for preventing hydrogen fluoride corrosion of glass in the aluminum electrolysis industry, which belongs to the field of glass anticorrosion, and comprises the steps of sequentially performing alkali washing, cleaning, surface activation, coating and drying on glass. The invention can make the coating better combine with the glass, and can improve the mechanical properties of the glass coating without reducing the physical and chemical properties and light transmittance of the glass. At the same time, according to the method, the corrosion of hydrogen fluoride can be effectively prevented, and the acid resistance and alkali resistance of the glass can be improved, the adsorption force of dust on the glass surface can be greatly reduced, and the light transmittance of the glass can be greatly improved. The present invention can increase the coating precision as a whole, increase the applicability of machine batch processing, ensure the anti-corrosion performance of the glass up to the standard while improving the efficiency, and because the entire coating process is suitable for equipment automation, compared with the existing Technology is easier to control.

Description

technical field [0001] The invention belongs to the field of glass anticorrosion, and in particular relates to a method for preventing hydrogen fluoride corrosion of glass applied in the aluminum electrolysis industry. Background technique [0002] The pollutants produced by aluminum electrolysis can be divided into four categories: flue gas, dust, waste heat and magnetic field. Among them, smoke, dust and magnetic field cause environmental pollution and endanger people's health, while waste heat causes high temperature in the workshop and deteriorates operating conditions. In the flue gas, it is divided into gas and solid components. The main components of gaseous substances are hydrogen fluoride (HF) and CF generated during the anode effect. 4 with C 2 f 6 . [0003] At present, there are a lot of equipment in the aluminum electrolysis workshop, especially large-scale equipment such as aluminum electrolysis cranes, many of which are equipped with glass. During the alum...

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Problems solved by technology

[0003] At present, there are a lot of equipment in the aluminum electrolysis workshop, especially large-scale equipment such as aluminum electrolysis cranes, many of which are equipped with glass. During the aluminum electrolysis production process, these glasses are very vulnerable to corrosion by hydrogen fluoride, resulting in the aluminum electrolysis multifunctional crane glass. Component damage reduces the reliability of the aluminum electrolysis crane, especially the precision photoelectric sensors and various displays on various equipment in the aluminum electrolysis workshop are corroded by hydrogen fluoride, which leads to the failure of various precision devices, and finally makes the aluminum electrolysis workshop various The device is not working properly

Therefore, in order to use the aluminum electrolysis multifunctional overhead crane stably for a long time, it is necessary to overcome the problem that the glass is easily corroded in the aluminum electrolysis working environment. However, there is currently no effective method and technology for preventing glass from being corroded by hydrogen fluoride on the market.

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