COOLING PATH WITH TWOFOLD COOLING TO A RESPECTIVE TARGET VALUE

摘要

As sections of a rolled product (1) pass through a cooling path (2), they are initially cooled in a first cooling phase by front cooling devices (6). The sections are then not cooled in a subsequent second cooling phase. They are finally cooled again in a subsequent third cooling phase, by rear cooling devices (8) of the cooling path (2). A control device (10) of the cooling path receives in each case an initial energy value (EA) exhibited by the sections before they pass through the cooling path (2). The control device furthermore receives a target energy (El *) and a target enthalpy (E2*). The control device (10) determines a first target cooling medium profile (K1 *) on the basis of the initial energy value (EA) and the target energy (E1 *). The control device controls the front cooling devices (6) in accordance with the first target cooling medium profile (K1 *) while the respective section is passing through the front cooling devices (6). The control device (10) determines a second target cooling medium profile (K2) on the basis of an expected enthalpy for the respective section in the second cooling phase and the target enthalpy (E2*). The control device controls the rear cooling devices (8) in accordance with the second target cooling medium profile (K2*) while the respective section of the rolled product (1) is passing through the rear cooling devices (8).

主权项

1. An operating method for a cooling path for cooling a rolled product made of metal comprising:
passing sections of the rolled product through the cooling path and initially cooling the sections using front cooling devices of the cooling path and the front cooling device using a liquid cooling medium in a first cooling phase, then not cooling the sections using the liquid cooling medium in a second cooling phase which follows the first cooling phase, and then finally cooling the sections again using rear cooling devices of the cooling path using the liquid cooling medium in a third cooling phase which follows the second cooling phase; a control device of the cooling path receiving an initial energy value (EA) which is exhibited by the sections before they pass through the cooling path, and the control device additionally receiving a target energy (E1*), and on the basis of the initial energy value (EA) and the target energy (E1*), using the control device for determining a first target cooling medium profile (K1*) and applying the profile (K1*) to the respective section of the rolled product in the first cooling phase; the control device activating the front cooling devices in accordance with the first target cooling medium profile (K1*) while the respective section of the rolled product is passing through the front cooling devices; the control device additionally receiving a target enthalpy (E2*), and on the basis of an expected enthalpy (EZ) for the respective section in the second cooling phase and the target enthalpy (E2*), using the control device for determining a second target cooling medium profile (K2) to be applied to the respective section of the rolled product in the third cooling phase, and the control device activating the rear cooling devices in accordance with the second target cooling medium profile (K2*) while the respective section of the rolled product is passing through the rear cooling devices.