Adjustable descaler
AssigneePrimetals Technologies Austria GmbH
InventorsMichael Trevor CLARK, Joseph LEE
Life of this patent
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Abstract
An adjustable descaling device for a rolling mill (20) for rolling a metal product (10) on a rolling line comprises one or more descalers (13a, 13b, 14a, 14b), at least one scale detection sensor (17, 18); and a processor (19). The sensor detects a scale pattern on a surface of the metal product (10) after descaling of the product. The processor adjusts the descaling impact pattern according to the detected scale pattern provided by the sensor.
Claims19
An adjustable descaling device for a hot rolling mill for hot rolling a metal product on a rolling line, the descaling device comprising
- one or more descalers, the descalers comprising high pressure water jets having nozzles configured for spraying water on the metal product on the rolling line;
- at least one scale detection sensor configured and operable to detect a scale pattern across a width of the metal product on a surface of the metal product after the descaling of the product;
- a processor configured and operable to adjust a descaling impact pattern of water sprayed on the metal product, according to the detected scale pattern provided by the sensor and according to a determined correlation between the detected scale pattern and a known pitch E of the descaling nozzles, wherein the processor is programmed to determine whether a standoff distance of the descaling nozzles from the metal product may not be optimum or wherein a very weak or zero correlation between the detected scale pattern and the pitch E of the descaling nozzles suggests that the scale pattern and the standoff distance of the water jets from the metal product are close to optimum.
A method of operating an adjustable descaling device which is in a hot rolling mill for hot rolling metal, wherein the device comprises one or more descalers each having descaling nozzles;
- the method comprising:
- descaling a metal product using high pressure water jets by spraying water from the nozzles of the jets on a surface of the hot rolling metal;
- after the descaling, operating one or more scale detecting sensors configured to determine a representation of a scale pattern across a width of the metal product, on a surface of the metal product being rolled;
- in a processor, comparing the determined scale pattern on a surface of the metal product with a stored correlation pattern related to a scale pattern;
- determining if the result of the comparison is outside an acceptable range of tolerance and, if the result is outside the acceptable range,
- adjusting one or more descalers of the descaling device according to the result of the comparison, by using a determined correlation between the detected scale pattern and a known pitch E of the descaling jet nozzles to suggest that the standoff distance of the descaling nozzles may not be optimum or else wherein a weak or zero correlation between the detected scale pattern and the pitch E of the descaling nozzles suggests that the scale pattern and nozzle standoff distance are close to optimum.
Dependencies are inferred from the claim text.