| 摘要 |
PROBLEM TO BE SOLVED: To provide a gas-blowing part structure in a molten metal vessel with which in the gas-blowing part set at the bottom part of the molten metal vessel, the service life of a gas-blowing refractory can be extended. SOLUTION: In the gas-blowing part in the molten metal vessel 11 constituted of the gas-blowing refractory 1 and tuyere refractory 4 contacted with the outer peripheral surface of the gas-blowing refractory 1, a cylindrical refractory 5 is set on the outer periphery of the tuyere refractory 4, and in a space 6 between the outer periphery of the tuyere refractory 4 and the inner periphery of the cylindrical refractory 5, a refractory 8 is filled up. By this constitution, the service life of the gas-blowing refractory can drastically be extended. Specially, in the structure, of which the molten metal side surface position of the gas-blowing refractory 1 and the tuyere refractory 4 is protruded at the molten metal side to the molten metal side surface of the bottom part refractory 13 in the molten metal vessel, the effect can drastically be displayed by forming the protruding structure at the same molten metal side as the molten metal side surface position of the cylindrical refractory 5. COPYRIGHT: (C)2011,JPO&INPIT |
