Abstract:Copper enamelled wire is an important secondary copper resource. The removal of organic paint layer on the surface of copper wire mainly depends on pyrolysis. Uneven heating in pyrolysis furnace will lead to incomplete removal of paint layer or oxidation of copper wire surface. Applying copper enamelled wire pyrolysis furnace as research object, the combustion and heat transfer process in the pyrolysis furnace was simulated, and the structure of the furnacewas optimized according to the simulation results. The results show that the EDM combustion model is used to simulate the heat generated by methane combustion, the temperature field distribution and flow direction of the high-temperature air flow in the furnace are obtained, and the problems of flow dead zone and uneven heating of tank are found in the furnace. According to the calculated flow field and temperature field, the furnace structure design is optimized, such as the flow baffle is added and the outlet position is changed, etc., which result in the increase of the heating area of the pyrolysis tank. The uneven heating of the tank is solved and the temperature uniformity is increased by about 58%, and the temperature required for pyrolysis could be reached 20 minutes in advance, which could save gas consumption in industrial production.