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Method for controlling steel feeding temperature of band steel of hot strip mill

A technology of hot continuous rolling mill and control method, applied in the field of metallurgical hot rolling

Active Publication Date: 2010-06-23
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

None of them involve how to control the adjustment of the running time of the strip in the intermediate roller table by controlling the temperature of the steel entering the hot continuous rolling mill

Method used

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  • Method for controlling steel feeding temperature of band steel of hot strip mill
  • Method for controlling steel feeding temperature of band steel of hot strip mill
  • Method for controlling steel feeding temperature of band steel of hot strip mill

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0157] Take Baosteel Co., Ltd.’s 1880mm hot rolling plant for rolling SPHC strip steel as an example:

[0158] 1. The concrete strip steel kind and specification thereof that embodiment uses

[0159] Strip type

Specification

SPHC

30-70mm

SS330

30-70mm

SS400

30-70mm

ST37-2

30-70mm

ST44-2

30-70mm

B380CL

30-70mm

SS490

30-70mm

SAPH440

30-70mm

QSTE340TM

30-70mm

QSTE380TM

30-70mm

QSTE420TM

30-70mm

WELTEN590RE

30-70mm

[0160] Strip type

Specification

B20H

30-70mm

30CrMo

30-70mm

30CRMO

30-70mm

B40

30-70mm

65MN

30-70mm

50MN2V

30-70mm

[0161] 2. Determine the length from the exit of rough rolling to the entrance of finish rolling to be 120-140m.

[0162] 3. Determine the switching point. The switching point is selected at 50m plus 10m of the maximu...

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Abstract

A method for controlling steel feeding temperature of band steel of a hot strip mill comprises the working procedures of confirming the speed switching point of the middle roller way; measuring the actual temperature of the intermediate billet of the band steel; and measuring the actual feeding steel temperature of the band steel through the rough rolling mill outlet. The method in the invention is characterized by confirming the speed switching point of the roller way according to the length from the rough rolling outlet to the finish rolling inlet; selecting different running speeds of the middle roller way according to different device commissioning solutions; confirming the steel feeding target temperature (experience data) required by different steel types; calculating and comparing the actual steel feeding temperature; obtaining the operation time of the band steel in normal condition by pre-calculating the temperature in the operation process of the band steel; confirming the operation speed of the band steel in the middle roller way, and switching the speed; controlling the finish rolling inlet temperature of the band steel by controlling and regulating the operation time so that the actual steel feeding temperature meets the steel feeding target temperature requirement, so as to control the steel feeding temperature of the hot strip mill.

Description

technical field [0001] The present invention relates to the field of metallurgical hot rolling. Specifically, the present invention relates to a method for controlling the temperature of strip steel in a hot tandem rolling mill. control method. Background technique [0002] In the metallurgical industry, the production of thin slab continuous casting and rolling coils includes the following process steps: [0003] Continuous casting slab - casting slab heating - billet descaling - rough rolling process - finishing rolling process - strip laminar cooling process - coiling. [0004] The strip rolled out of the finishing mill is cooled by the strip laminar flow cooling system on the output roller table to cool the hot-rolled strip from the final rolling temperature to the specified coiling temperature. The cooling method of strip steel and the amount of cooling water are calculated, set and controlled by computer according to different steel types, specifications, final rolli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/74
Inventor 徐欣磊荣鸿伟高志玲王军
Owner BAOSHAN IRON & STEEL CO LTD
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