Method for automatically controlling annealing speed of strip steel

A technology of annealing speed and strip steel, applied in the direction of heat treatment process control, manufacturing tools, furnaces, etc., can solve the problem that the conductivity of the cooling water in the WQ groove without considering the deviation of the strip steel is beyond the standard, so as to avoid the annealing process inconsistent and meet the annealing process required effect

Active Publication Date: 2022-05-13
BAOSTEEL ZHANJIANG IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method also does not take into account abnormal conditions such as strip deviation, strip bending in the furnace, and conductivity of WQ tank cooling water exceeding the standard.

Method used

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  • Method for automatically controlling annealing speed of strip steel
  • Method for automatically controlling annealing speed of strip steel

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Experimental program
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Embodiment 1

[0031] After steelmaking, continuous casting, hot rolling, pickling and cold rolling, the steel strip enters such as figure 1 The strip continuous alloying hot-dip galvanizing line shown is for heat treatment, hot-dip galvanizing and coating alloying annealing. The maximum operating speed of the set is V max =150mpm, design minimum stable running speed V min =50mpm, the minimum design allowable operating speed is 11mpm, the strip thickness range is 0.5-2.0mm, and the normal acceleration and deceleration rate of the unit is ±0.1m / s 2 , the deceleration rate of the unit's fast stop is -0.3m / s 2 , the deceleration rate of the emergency stop of the unit is -0.6m / s 2 , the unit takes the second roll of 5BR (the tension roll in front of the zinc pot) as the command roll, that is, its line speed is the unit speed. The annealing furnace of this unit includes a direct fire heating section 32, a radiant tube heating section 33, a radiant tube soaking section 34, a slow cooling sectio...

Embodiment 2

[0036] After steelmaking, continuous casting, hot rolling, pickling and cold rolling, the strip enters the strip continuous annealing unit for annealing. The maximum operating speed of the unit is V max =300mpm, design minimum stable running speed V min =40mpm, the minimum design allowable operating speed is 30mpm, the strip thickness range is 0.4-2.5mm, and the normal acceleration and deceleration rate of the unit is ±0.05m / s 2 , the deceleration rate of the unit's fast stop is -0.3m / s 2 , the deceleration rate of the emergency stop of the unit is -1m / s 2 , the unit takes the second roll of 4BR (the tension roll after the slow cooling section) as the command roll, that is, its line speed is the unit speed. The annealing furnace includes preheating section, radiant tube heating section, radiant tube soaking section, slow cooling section (SCS section), rapid cooling section (RCS section), overaging treatment section 1, overaging treatment section 2, final jet cooling Section...

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Abstract

The invention relates to the technical field of strip steel continuous heat treatment, and discloses a strip steel annealing speed automatic control method, which comprises the following processes: the strip steel annealing speed of a unit is automatically controlled by a program, the maximum production capacity of the unit is controlled by default, the output of the unit is maximized, and the maximum production capacity is represented by a target TV value; the target TV value is the product of the thickness of the incoming strip steel and the maximum running speed of the strip steel unit with the thickness allowed by the capacity of the unit, and the unit strip steel annealing speed automatic control program uses the target TV value to divide the thickness of the strip steel at the inlet of the annealing furnace to obtain a unit strip steel annealing speed target value Vaim; automatic control over the speed of the unit is achieved, unmanned production of strip steel annealing can be achieved, the limit capacity of the unit can be exerted when the unit has abnormal limitation, the unit is made to conduct production under the real-time maximum hourly yield, process control is considered, the requirement of the annealing process is met, a certain margin is reserved, and the situation that the annealing process is inconsistent is avoided.

Description

technical field [0001] The invention relates to the technical field of continuous heat treatment of strip steel, in particular to an automatic control method for annealing speed of strip steel. Background technique [0002] In order to improve the formability of the strip steel, the strip steel obtained by cold rolling is usually annealed. Generalized annealing includes continuous annealing and bell annealing. This patent only involves the continuous annealing treatment of strip steel, and related units include continuous strip annealing unit, continuous hot-dip galvanizing unit for strip steel, continuous alloying hot-dip galvanizing unit for strip steel, continuous hot-dip low-aluminum-zinc-aluminum-magnesium unit for strip steel Units, strip steel continuous hot-dip medium-aluminum-zinc-aluminum-magnesium unit, strip continuous hot-dip high-aluminum zinc-aluminum-magnesium unit, strip continuous hot-dip aluminum-zinc-silicon unit and strip continuous hot-dip aluminum-sil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D11/00C21D1/26C21D9/52
CPCC21D11/00C21D1/26C21D9/52
Inventor 张理扬吴佳桐王骏飞
Owner BAOSTEEL ZHANJIANG IRON & STEEL CO LTD
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