| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a cast slab scarfing apparatus which surely prevents any defect from being caused in a product after the rolling. Ž<P>SOLUTION: A plurality of nozzle unit groups 2 are arranged in the width direction of a cast slab. First and second piping systems 11, 12 for feeding scarfing oxygen are connected to each of the plurality of nozzle unit groups 2. High-pressure/low-pressure changing solenoid valves 8, 13 which alternately change the pressure of the scarfing oxygen to be supplied to each of the plurality of nozzle unit groups 2 to the high pressure and the low pressure are provided on the first and second piping systems 11, 12. The high-pressure/low-pressure changing valves 8, 13 are controlled so that low-pressure scarfing oxygen is supplied to the other nozzle unit 1 when high-pressure scarfing oxygen is supplied to any one of the nozzle units 1 adjacent to each other, and the high-pressure scarfing oxygen is supplied to the other nozzle unit 1 when the low-pressure scarfing oxygen is supplied to one of the nozzle units 1 adjacent to each other. Thus, the dynamic pressure distribution in the width direction of the cast slab surface generated in the nozzle unit groups 2 during the scarfing is periodically fluctuated. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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