Hydrofluoric acid resistant anti-corrosion material for steel structure of Yulin electrolytic aluminum production workshop

Modern aluminum electrolysis uses cryolite alumina molten salt electrolysis process to produce aluminum. A large amount of flue gas will be generated in the process of electrolytic aluminum production. The flue gas is composed of gaseous and solid materials.

Gaseous substances mainly include C0 (carbon dioxide), C0 (carbon monoxide) gas generated during anode electrochemical reaction, CF (carbon tetrafluoride) generated during anode effect, HF (hydrogen fluoride) gas generated by the hydrolysis of fluorinated brine, SF (silicon tetrafluoride) generated by the reaction of SiO (silicon dioxide) impurity in raw materials with cryolite and other pollutants, mainly HF _four And other fluorinated gases.

Solid matter is generated by the volatilization and flying loss of raw materials, which mainly includes two types. One is the large particles of aluminum oxide and cryolite dust and carbon particles dropped from the anode when discharged with the anode gas. As alumina adsorbs some gaseous fluoride, the total fluorine content in large particles is about 15%; the other is fine particles that become solid dust after condensation of electrolyte vapor, in which the fluorine content reaches 45%.

According to the knowledge of Zhisheng Weihua Guo, the HF (hydrofluoric acid) fluorinated gas in the flue gas will react with the moisture in the air and generate hydrofluoric acid, which is highly corrosive. A small amount of hydrofluoric acid in the production workshop will cause medium strength corrosion to the production workshop and equipment.

In view of the corrosive composition of hydrofluoric acid, ZS-1033 hydrofluoric acid resistant anti-corrosion coating independently developed by Zhisheng Weihua Company is made of phenolic resin, barite, nano chromium powder, anti medium solid filler and other special materials, which can withstand a long-term temperature of 200 ℃. The coating is compact and stable, and is resistant to strong acid corrosion, especially hydrofluoric acid (HF) corrosion, The dense coating can also prevent hydrogen ion penetration, and can well protect metal and other materials from corrosion.

ZS-1033 hydrofluoric acid resistant anti-corrosion coating has good hardness, high strength, resistance to impact scouring and pneumatic wear, and good acid resistance rate of hydrofluoric acid and mixed acid of nitric acid, sulfuric acid and hydrofluoric acid. It is widely used in electrolytic aluminum industry and is an important coating material resistant to hydrofluoric acid corrosion. Zhisheng ZS-1033 hydrofluoric acid resistant anticorrosive coating is used, which is convenient for construction, can be sprayed and brushed, and can be cured at room temperature, with good anticorrosive effect and a service life of up to 10 years. Through the specific use of experts and working conditions, the characteristics and application effects of the materials have been recognized by all parties in the electrolytic aluminum industry, known as the ceiling of hydrofluoric acid anti-corrosion industry.

Application expansion (other equipment requiring protection): flue duct, main smoke exhaust fan, roots blower, high-pressure centrifugal fan, pneumatic elevator, bag filter, heat exchanger, etc. For products, please consult Zhisheng Weihua Guogong.