| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.29 ( November 1993 ) Special Issue on Iron Power ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Development of the CLECIM-KSC Type DC Arc Furnace Nobuyoshi Takashiba, Kiyoshi Takahashi, Shyunji Otsubo, Yoshitaka Oh-iwa, Hiroji Numata, Arata Ueda |
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Synopsis : Kawasaki Steel Corp. (KSC) has, in cooperation with the French company CLECIM, developed a new type of DC arc furnace and achieved uniform melting with a 100-t unit. The main features of the CLECIM-KSC type DC arc furnace are: (1) Arc deflection is prevented by an appropriate layout of three water-cooled electrodes and bus tubes and (2) arc direction also is controlled by individual control of each of the three bottom electrodes. The safety of the IRSID water-cooled bottom electrodes was confirmed by a heat transfer analysis. The service life of these electrodes is extremely long, and their simple configuration facilitates repairs to the furnace bottom refractors. To ensure safety and a good working environment around the furnace and high productivity, the bottom electrodes can be replaced from outside the furnace shell. Oxygen blowing and other operational tasks have been automated, and the dust collection system in the building which houses the furnace was designed on the basis of the flow analysis and model experiments. |
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