The flue gas generated during the smelting process of a closed furnace contains a large amount of carbon monoxide gas, with a content of over 70%, which is a high heat and high value-added “clean energy”. The clean gas obtained from the purification treatment of the flue gas can be used for power generation or as fuel for other equipment in the plant, which can significantly reduce the comprehensive energy consumption of unit alloy products and improve the energy efficiency level of the production process.

The gas dry purification system is the main equipment for gas recovery and utilization in smelting furnaces. It generally consists of cyclone settling tank, primary gas fan, secondary gas fan, explosion-proof bag bin, dust unloading system, dust conveying system, dust storage system, gas venting system, pipeline system, and nitrogen protection system. Compared with traditional wet purification technology, it has the characteristics of energy saving, water saving, carbon reduction, and environmental protection.

Our new-generation gas dry purification system has been optimized and upgraded several times based on a comprehensive summary of the operating experience of many enterprises. The equipment body dust removal bin has good airtightness and no leakage during long-term operation. The filter bag is resistant to high temperatures, has a high filtration rate, and good dust removal efficiency. The equipment is easy to maintain and repair. It can achieve online removal of any dust-removal bin without affecting the full-load operation of other bins and the submerged arc furnace. The curved head at the top of the dust removal bin can be fully opened, allowing operators to replace the filter bags outside the dust removal bin. Compared with the design of reserving manholes in the dust removal bin, it can better avoid the risk of operators working in the enclosed combustible gas explosion area, and is highly safe. The dust removal effect of the system is less affected by the concentration and quality of smoke and dust, and can operate stably even in poor furnace conditions.

This set of system can be customized according to the flue gas characteristics of different alloy products in closed submerged arc furnaces. The process technology route is mature and reliable, and the equipment design and manufacturing quality are excellent. It can be widely used in closed submerged arc furnaces such as manganese series, chromium series, nickel series, and calcium carbide, especially suitable for fully enclosed renovation projects of semi-closed submerged arc furnaces.