Design Calculation,Numerical Simulation And Structure Optimization Of Copper Refining Reverb Furnace

Nowadays,the reverb furnace is key refining equipment in the copper manufacture company.However,there is large fuel consumption,and low thermal efficiency around 15%-30%.Although it has been improved by punching a hole for molten copper,automatic control for charging system and oxygen enrichment melting technology at home and abroad,the objective of the energy conservation and environmental protection cannot be achieved.Therefore,the thermal behaviors of copper reverb furnace need be revealed,it would improve the performance of copper reverb furnace,which may provide a reference for the copper refining.Based on the knowledge of the thermal behaviors of the copper reverb furnace,the copper reverb furnace is designed with the annual output of 28 thousand tons.Moreover,the combustion space is simulated using the k-? turbulent model,P-1radiation model,and species transport model.The results indicated that the velocity field and temperature field are uneven,and the combustion temperature is low.Besides,the horizontal distance between the burners has a significant effect on the combustion,which hinders the rise of the gas temperature.To investigate the effects of the factors on the thermal behaviors of the copper reverb furnace,the vertical angle of the burner,the horizontal distance between the burners,the pool depth,and air preheated temperature are taken into account.Meanwhile,the gas temperature is considered as the evaluation objective.The optimum scheme is obtain by the orthogonal experiment.The results are as follows:1)The gas temperature increases with the vertical angle and the air preheated temperature.The gas temperature decreases with the pool depth.The gas temperature firstly increases,and then decreases with the horizontal distance between the burners.2)The optimum scheme is the pool depth of 600 mm,the vertical angle of 25°,the horizontal distance between the burners of 600 mm,and the air preheatedtemperature of 550 K.The gas temperature from the initial case of 1339 K increases to the optimum case of 1499 K.By the range analysis,the important range of the factors is successively the air preheated temperature,the vertical angle,the horizontal distance between the burners,and the pool depth.To further explore the charge weight on the effect of the flow and heat transfer in the copper reverb furnace,the three geometry models are put forward and numerically simulated.The simulated results show that the gas temperature firstly increases,and then decreases with the charge weight.And the copper temperature reduces with the charge weight.