Furnace Aging (Carburization) Treatment

Furnace Coking Treatment, essentially a special carburization process for the inner wall of the furnace, is primarily applicable to the initial startup of new furnaces or the restart after a long-term shutdown. Its core principle is to generate a carbon black protective layer on the surface of the refractory material through high-temperature carburization, which seals micropores, reduces atmosphere consumption, and enhances the carbon potential response speed. The operational procedure is as follows: heat the empty furnace to a temperature of not less than 760°C at a rate of ≤100°C/h, then introduce a carrier gas (such as nitrogen, flow rate 300-400L/min) and gradually introduce enriching gas (e.g., starting flow rate 0.2m³/h), to rapidly establish and maintain a strong carburization atmosphere environment of Cp=1.3-1.5% C in the furnace for 8-12 hours, promoting the formation of a dense carbon black protective layer on the surface of the furnace refractory material. During this process, the carbon black deposition status needs to be confirmed every 2 hours through the observation port.