Abstract：Based on ferroalloy submerged arc furnace, semi-closed submerged arc furnace is considered to be reconstructed to closed submerged arc furnace. In this way, the oiler fouling of semi-closed submerged arc furnace and the low flue gas temperature are both avoided, and at the same time, the high calorific value gas is produced in the production process of closed submerged arc furnace, which can solve the low recovery efficiency of semi-closed submerged arc furnace effectively. Finally, taking 2×31 500 kV·A Mn-Si furnaces for example, the reconstruction location, reconstruction components, reconstruction equipment and the operation of process adjustment after transformation of semi-closed submerged arc furnace are analyzed. By comparing the submerged arc furnace waste heat recovery system before and after reconstruction, the effects of heat recovery and investment effectiveness are discussed, which could provide references for the recovery, rational utilization of waste heat and exploitation for industrial production process.
2016, Vol. 26 
