Economic secondary descaling
AssigneeArcelorMittal France
InventorsValerie Daeschler, Jean-Luc Borean, Nathalie Mikler, Gilles Dussart, Sylvain Mialot, Patrice Matet
Life of this patent
Estimating the term…
Abstract
A process for secondary descaling of running metal strips, especially made of steel, during hot-rolling by-spraying water onto the surface of the running metal strips with spray rails having nozzles supplied with pressurized water, wherein the nozzles are supplied at a hydraulic pressure of from 3 to 30 bar, and wherein the nozzles are regulated so that heat flux density extracted from the strip (HF) resulting from the cooling of its surface by the sprayed water is between 6.5 and 20 MW/m2 for a strip temperature between 900 and 1100° C.
Claims21
A process for secondary descaling of running metal strips during hot-rolling, the process comprising:
- spraying water onto a surface of the running metal strips with spray rails having nozzles supplied with pressurized water to descale the surface, wherein all of the nozzles are supplied at a hydraulic pressure of from 3 to 30 bar, and
- regulating the nozzles so a heat flux density extracted from the strip (HF) resulting from the cooling of the surface by the sprayed water is between 6.5 and 20 MW/m2 for a strip temperature between 900 and 1100° C.
Dependencies are inferred from the claim text.