The closed mine-heated electric furnace has high temperature and complex composition. At the same time, the nature of the furnace gas composition is relatively special. The particles of dust are fine, the specific surface area is large, the specific gravity is light, and it is difficult to clean the dust. The temperature of the furnace gas in the closed mine-heating electric furnace is 600~800 ℃, and the instantaneous temperature can reach 1000 ℃ under special furnace conditions.

According to the characteristics of closed submerged arc furnace gas, dry furnace gas purification technology is adopted, multi-stage gravity baffle settler (patented technology) and air cooler are used to remove dust and cool the furnace gas, and then bag filter is used to remove dust, so that the dust content of purified furnace gas can reach below 20mg/Nm, and the equipment operation is safe and reliable.