Rolling mill roll-cleaning device and cleaning method
AssigneesNippon Steel & Sumikin Engineering Co., Ltd., Ns Plant Designing Corporation
InventorsMuneshige Ogawa, Hisamoto Wakabayashi, Makoto Katsube, Hiroshi Nishikawa
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Abstract
Generation of cavitation jet in air on a surface of a work roll provides a higher cleaning force than squirting of only high pressure fluid, so that sticking substances on the surface of the work roll are reliably removable. When a distance between a cleaning nozzle and the surface of the work roll and pressure of the high pressure fluid are controlled within a predetermined range, sticking substances are efficiently removable while roughness of the surface of the work roll is maintained.
Claims7
A cleaning device for a rolling roll, the cleaning device comprising a cavitation nozzle that is used for cleaning a work roll used in a rolling mill, wherein
- in order to clean zinc adhered to a surface of the work roll while keeping surface roughness of the work roll,
- a distance X between a tip end of the cavitation nozzle and the surface of the work roll is set in a range of 30 mm to 40 mm;
- a pressure PH of high pressure fluid squirted from the cavitation nozzle is set in a range of 20 MPa to 40 MPa;
- a pressure PL of low pressure fluid squirted from the cavitation nozzle simultaneously with the high pressure fluid is set in a range of 0.03 MPa to 0.07 MPa;
- and
- the pressure PH of the high pressure fluid satisfies PH≦0.5X+20.
A method of cleaning a work roll of a rolling roll using a cavitation nozzle, the method comprising:
- setting a distance X between a tip end of the cavitation nozzle and a surface of the work roll at a predetermined distance in a range of 30 mm to 40 mm;
- setting a pressure PH of high pressure fluid squirted from the cavitation nozzle at a predetermined value in a range of 20 MPa to 40 MPa;
- setting a pressure PL of low pressure fluid squirted from the cavitation nozzle simultaneously with the high pressure fluid at a predetermined value in a range of 0.03 MPa to 0.07 MPa;
- and
- cleaning zinc adhered on the surface of the work roll while keeping roughness of the surface of the work roll, by squirting the high pressure fluid from the cavitation nozzle in which the pressure PH of the high pressure fluid is set to satisfy PH≦0.5X+20.
Dependencies are inferred from the claim text.