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Steel burning method with forward thermal load

A technology of heat load and heating temperature, which is applied in the field of steel burning with advance heat load, and slab steel burning for hot-rolled plate production. Even temperature effect

Active Publication Date: 2022-03-04
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no way to solve the aforementioned problems through heating heat load distribution

Method used

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  • Steel burning method with forward thermal load
  • Steel burning method with forward thermal load
  • Steel burning method with forward thermal load

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Experimental program
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Effect test

Embodiment 1

[0017] Embodiment 1: The present invention proposes a steel burning method with a heat load shifted forward. The method is aimed at the actual situation that the heating curves of slabs are greatly different and cannot be unified. Fluctuation is used to realize the process stability and consistency in the second half of the heating process (two-addition, soaking section) as much as possible, and realize the second-addition section and soaking section. Compared with the conventional steel firing, which only requires the end temperature of the second heating section and the end slab of the soaking section (the target temperature of the slab coming out of the furnace), the temperature requirement at the end of the first heating section is added. Conventional soaking requires a gentle temperature rise, and the present invention also requires a gentle temperature rise as much as possible to reduce the temperature rise level, ensure that the slab is thoroughly burned, and improve the...

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Abstract

The invention relates to a thermal load forward-moving steel burning method. The method comprises the following steps that 1, a slab tapping mark to be optimized and a product specification are determined; 2, the target heating temperature T of the product is inquired; step 3, determining the end temperature T1 of the target first heating section: T1 = T-Tm; wherein T1, T and Tm are the final temperature of the first adding section of the variety specification, the target temperature and the temperature rise amount of the rear section of the variety specification respectively. Generally, the temperature rise amount of the heating rear section is controlled to be 120-180 DEG C when the thermal load is moved forwards; 4, the heating weight coefficient of the plate blank is set to be n; wherein n is the weight coefficient of the slab and is 3-8, and the weight coefficient of the common slab is 1; and 5, determining the furnace gas temperature of each section of the heating furnace. According to the scheme, the temperature rising speed in the early heating stage is increased, the slab is long in the high-temperature stage, steel can be thoroughly burnt, and the heating quality is good.

Description

technical field [0001] The invention relates to a method for producing slabs by hot-rolled plates, in particular to a method for burning steel by moving the heat load forward, and belongs to the technical field of hot continuous rolling production and processing. Background technique [0002] When producing hot-rolled strip steel, the heating process is mainly to heat the slab to a specified temperature to ensure smooth rolling and stable product performance. The slab temperature is generally calculated, and the model calculates the slab temperature based on the temperature detected by the thermocouples in each area and the residence time of the slab in each area. Due to the position difference between the slab and the thermocouple, there may be a deviation between the furnace gas temperature at the thermocouple and the furnace gas temperature at the actual position of the slab, resulting in a deviation between the actual temperature of the slab and the calculated temperatur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/70C21D11/00
CPCC21D9/70C21D11/00Y02P90/30
Inventor 李欣波罗克力卫文峰
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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