MATHEMATICAL MODEL FOR HEAT TRANSFER OF WATER-COOLING STEEL-STICK BOTTOM ELECTRODE OF DC

Of recent years,the portion of steelmaking with DCEAF in the iron and steel industry is increasing day by day,but the problem related to the service life of bottom electrode has not been perfectly solvedAs an example,this paper analyzes the heat transfer of the watercooling steelstick electrode in the procedure of steelmaking with DCEAFFurthermore,a 3D mathematical model on the heat transfer of furnace bottom is built by use of control capacity method,and the feasibility of the model is verified in the light of the measured dataOn above basis,the melted behavior of bottom electrode in every condition is simulated with varied key parametersFinally,the optimum smelting conditions are found and the service life of bottom electrode has been prolongedIt can be seen from the simulation results that Joule′s heat transferred to bottom electrode,current intensity in the period of refining and temperature difference between inlet and outlet of coolingwater have a great influence on the melted depth of bottom electrode during the process of steelmaking in DCEAFIn this paper,the functions of these factors are systematically described