Method of preventing hydrogen fluoride corrosion for glass in aluminum electrolysis industry

Abstract

The invention discloses a method of preventing hydrogen fluoride corrosion in aluminum electrolysis industry and belongs to the field of glass corrosion prevention. The method includes the sequentialsteps of alkali washing of glass, cleaning, surface activation, coating, and drying. The method allows a coating and glass to be combined better; mechanical properties of the glass coating can be improved; whole mechanical and chemical properties and light transmittance of glass are not lowered. In addition, the method helps effectively prevent hydrogen fluoride corrosion and improve tolerance ofglass to acids and bases, attraction of dust to glass surface is greatly reduced, and light transmittance of the glass is greatly improved. The method allows coating precision to be improved on the whole, adaptability of machine batch treatment is improved, and it is guaranteed that anticorrosion performance of glass meets the standard at the premise of improved efficiency; as the whole coating step is applicable to automation on equipment, the method has better control convenience than the prior art.

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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