Method and a control device for operating a combined casting/rolling installation

Patent metadata

Field	Value
Publication number	US-12042833-B2
Application number	US-201716346584-A
Country	US
Kind code	B2
Filing date	Oct 12, 2017
Priority date	Nov 7, 2016
Publication date	Jul 23, 2024
Grant date	Jul 23, 2024

Abstract

A method for operating a combined casting/rolling installation: A casting machine (4) of the combined installation (2) produces a cast product (40) and a rolling mill (6, 8) of the installation (2) produces a rolled product (42a, 42b) from the cast product (40). The installation (2) has a control device (12) with a measuring unit (14) and a controller (16). The measuring unit (14) detects a rolled-product property, generates a measurement signal dependent on that property and transmits the measurement signal to the controller (16), and the controller (16) uses the measurement signal to generate a control signal for the casting machine (4) based on a control algorithm and transmits the control signal to the casting machine (4) which uses the control signal to set a casting parameter. The detected rolled-product property is a temperature profile of the rolled product (42a, 42b) in the width direction thereof and the casting parameter that is set by the casting machine (4) using the control signal is a cooling parameter of the casting machine (4).

First claim

The invention claimed is:

1. A method for operating a combined casting/rolling installation, comprising:
operating a casting machine of the combined casting/rolling installation for producing a cast product, the casting machine having a mold having a primary cooling device and a guiding system with a secondary cooling device comprising a plurality of nozzles arranged along a width direction of the cast product, each nozzle of the plurality of nozzles being displaceable relative to the other nozzles of the plurality of nozzles and displaceable relative to the cast product independently of the other nozzles of the plurality of nozzles, the cast product exiting the mold and passing through the guiding system to the rolling installation; and
then operating a rolling mill of the combined casting/rolling installation to produce a rolled product from the cast product;
wherein the combined casting/rolling installation has a control device with a measuring unit and a controller;
operating the measuring unit to detect a rolled-product property and to generate a measurement signal dependent on the rolled-product property and transmitting the measurement signal to the controller, wherein
the rolled-product property that is detected by the measuring unit is a temperature profile of the rolled product in the width direction thereof; and
obtaining a preset material/surface property for the rolled product by causing the controller to generate a control signal with an algorithm based on the measurement signals to control the casting machine and transmitting the control signal to the casting machine to set a temperature profile of the cast product to obtain a temperature profile for the rolled product in the width direction of the rolled product that results in the preset material/surface property for the rolled product, and cooling the cast product with the secondary cooling device based on the control signal by changing a distance between at least one of the nozzles of the plurality of nozzles and the cast product, and a distance between the at least one of the nozzles of the plurality of nozzles and the other nozzles of the plurality of nozzles by repositioning with an actuator the at least one of the nozzles of the plurality of nozzles relative to the cast product and the other nozzles of the plurality of nozzles independently of the other nozzles of the plurality of nozzles; and
wherein the rolling mill is a blooming mill and the combined casting/rolling installation comprising a further rolling mill, wherein the further rolling mill is a finishing mill, and
wherein the temperature profile of the rolled product is detected with respect to a running direction of the rolled product between the blooming mill and the finishing rolling mill, or downstream of the finishing rolling mill.

2. The method as claimed in claim 1 , wherein the cast product generated by the casting machine is a metal strand.

3. The method as claimed in claim 1 , wherein the rolled product generated by the rolling mill is a metal strip.

4. The method as claimed in claim 1 , further comprising continuously operating the combined casting/rolling installation for causing the rolled product generated by the combined casting/rolling installation to be a continuously rolled metal strip.

5. The method as claimed in claim 1 , further comprising generating the rolled product by a hot rolling process.

6. The method as claimed in claim 1 , further comprising feeding a setpoint value of the rolled-product property to the controller and the control signal generated by the controller is dependent on a deviation between the setpoint value of the rolled-product property and an actual value of the rolled product property, and determining, the actual value of the rolled-product property by the controller using the measurement signal.

7. The method as claimed in claim 1 , wherein, in the repositioning with the actuator, the at least one of the nozzles' distance to the cast product and the at least one of the nozzles' distance to at least another one of the nozzles of the plurality of nozzles are changed simultaneously.

8. The method as claimed in claim 1 , wherein the at least one of the nozzles of the plurality of nozzles is fastened to a nozzle holder, and wherein the nozzle holder is connected to the actuator, and further comprising operating the actuator to move the nozzle holder along a direction that is at an oblique angle to the direction of travel of coolant exiting the at least one of the nozzles of the plurality of nozzle, whereby, in the repositioning with the actuator, the at least one of the nozzles' distance to the cast product and the at least one of the nozzles' distance to at least another one of the nozzles of the plurality of nozzles are changed simultaneously.

Assignees

• Primetals Technologies Austria GmbH

Inventors

• Lengauer Thomas

Classifications

• B21B38/006

  for measuring temperature · CPC title

• B23P17/00

  Metal-working operations, not covered by a single other subclass or another group in this subclass · CPC title

• B22D11/16

  Controlling or regulating processes or operations · CPC title

• B22D11/225

  for secondary cooling · CPC title

• B22D11/141 Primary

  for vertical casting · CPC title