Sustainable Mining and Metallurgy

The original glass fiber demister of the acid-making primary absorption tower of Yunnan Tin Group 100000t/a copper smelting project was easy to corrode due to the high fluorine content in the off-gas, resulting in a large amount of acid mist at the outlet of the primary absorption tower, which corroded the acid making device, affecting the normal production of acid making system and even smelting system. Aiming at this problem, the new type carbon fiber demister was used. The mass of carbon fiber is lighter than that of metal aluminum, but has a strength stronger than steel, which has the characteristics of high hardness and high strength, light weight, good chemical properties and high temperature resistance. After the demister of the primary absorption tower was replaced by the new type carbon fiber demister, the production has been operated for 3 years, no filter-broken by corrosion occured, which meant that this new type demister can meet the process requirements of off-gas acid making for copper smelting.