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 effect CF( Carbon tetrafluoride ) , produced by the hydrolysis of fluorinated brine HF( Hydrogen fluoride ) Gas: and impurities in raw materials Si0( silicon dioxide ) Reaction with cryolite SF( Silicon tetrafluoride ) And other pollutants, mainly including 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 a part of gaseous fluoride, the total fluorine content in large particles is about fifteen %: The other is the fine particles that become solid dust after condensation of electrolyte vapor, in which the fluorine content reaches forty-five ％。
According to the understanding of Zhisheng Weihua Guo HF (Hydrofluoric acid) Fluorine containing gas will react with water 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.
For this corrosive component of hydrofluoric acid, Zhisheng Weihua Company independently developed ZS-1033 Hydrofluoric acid resistance Anticorrosive coating Selection phenolic resin Barite nanometer Chromium powder, anti medium solid filler And other special materials, which can withstand temperature for a long time 200℃ The coating is dense and stable, resistant to strong acid corrosion, especially hydrofluoric acid（ HF ）The corrosion effect is good. The dense coating can also prevent hydrogen ion penetration, and can well protect metals and other materials from corrosion.
ZS-1033 The 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. Adopt Zhisheng ZS-1033 Hydrofluoric acid resistant anti-corrosion coating, easy to construct, can be sprayed and brushed, and can be cured at room temperature, with good anti-corrosion effect and longest service life ten 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.
