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A Method for Controlling the Rough Strip Width of a Hot Tandem Mill Based on Multiple Heating Furnaces

A hot continuous rolling mill and width control technology, which is applied in the direction of metal rolling stands, metal rolling mill stands, etc., can solve the problems of not taking into account the width deviation of the rough rolling outlet, frequent fluctuations of the rough rolling outlet width, etc.

Active Publication Date: 2016-01-20
BAOSHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For this reason, the different steel firing methods of each heating furnace also caused the natural width of the slab to fluctuate with the change of the furnace number during the rough rolling process, which eventually caused frequent fluctuations in the width of the rough rolling exit.
[0038] 2) The existing global adaptive correction of rough rolling width is learned in layers according to steel type-thickness grade-width grade. The correction can compensate for the width deviation caused by the characteristics and specifications of the strip steel material itself, and can also compensate for the zero position change after the vertical roll is replaced. Width deviation caused by this, but does not take into account the fluctuation of rough rolling exit width deviation caused by the difference in steel firing between several heating furnaces, and does not compensate for it

Method used

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  • A Method for Controlling the Rough Strip Width of a Hot Tandem Mill Based on Multiple Heating Furnaces
  • A Method for Controlling the Rough Strip Width of a Hot Tandem Mill Based on Multiple Heating Furnaces
  • A Method for Controlling the Rough Strip Width of a Hot Tandem Mill Based on Multiple Heating Furnaces

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Experimental program
Comparison scheme
Effect test

Embodiment

[0175] Precomputation stage:

[0176] Take strip steel 3050100100 as an example: finished product width pri_width: 1500mm, fixed margin add_width: 8mm, target width aim_width=1500+8=1508mm, this piece of steel comes from 3# heating furnace, and the rough rolling global width genetic coefficient width_corr is calculated in the model : -8mm, vertical roll gap zero correction value zero_corr: 3mm, vertical roll wear edger_wear: -0.8mm, vertical roll bounce edger_iKNflexsioKN: 0.5

[0177] The process of calculating the furnace number-related width correction value width_corr_fur is as follows:

[0178] By default, the model takes furnace No. 1 as the benchmark furnace number, and obtains the genetic coefficient table related to the furnace number:

[0179]

[0180] Furnace number-related width correction value Width_corr_fur=base furnace number width correction coefficient corr_fur[1]-current strip furnace number-related width correction coefficient corr_fur[3]=-1.5-(-3)=1.5m...

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Abstract

The invention discloses a rough rolled band steel width control method of a hot continuous rolling mill based on multiple heating furnaces. The control method comprises the following steps: based on the existing rough rolled band steel width compensation, according to different deviations of outlet widths of plate billets from the multiple heating furnaces in the rough rolling process, separating out the rough rolling outlet width deviation due to difference of steel burning manners in the heating furnaces; aiming at the rough rolling outlet width deviation due to the steel burning manners in the heating furnaces, carrying out corresponding compensation to different heating furnaces, so as to reduce rough rolling width fluctuation due to difference of the steel burning manners in the heating furnaces.

Description

technical field [0001] The invention relates to the field of hot rolling production process control. Specifically, the present invention relates to a method for controlling the width of a rough-rolled strip in a hot tandem mill. The method for controlling the width of a rough-rolled strip in a hot tandem mill is a method for controlling the width of a rough-rolled strip in a hot tandem mill based on multiple heating furnaces. The method is based on the existing rough-rolled strip width compensation, and according to the difference in the exit width deviation of the slabs coming out of multiple heating furnaces during the rough-rolling rolling process, the rough-rolled area caused by the difference in the way the heating furnace burns steel is separated. The exit width deviation, and for this deviation, the heating furnaces make corresponding compensations, thereby reducing the rough rolling width fluctuation caused by the difference in steel burning of each heating furnace, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/22
Inventor 刘苗幸利军张先念
Owner BAOSHAN IRON & STEEL CO LTD
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