Control method of head-to-tail differential burning of x80 pipeline steel slab

A control method and technology for steel slabs, which are used in heat treatment process control, manufacturing tools, furnaces, etc., can solve the problems of low coiling temperature hit rate and large temperature drop at the tail of the intermediate billet, improve product structure, increase economic benefits, The effect of enhancing market competitiveness

Active Publication Date: 2018-09-11
INNER MONGOLIA BAOTOU STEEL UNION
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  • Claims
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Problems solved by technology

[0006] The technical problem solved by the present invention is to provide a method for controlling the head-to-tail differential burning of X80 pipeline steel slabs, so that the temperature at the tail of the X80 grade hot-rolled coil slab is about 20°C higher than the temperature of the head when it comes out of the furnace, and solves the problem of the tail of the middle slab. The problem of low hit rate of coiling temperature due to large temperature drop makes the mechanical properties of X80 grade hot-rolled coil qualified and stable along the length direction of the steel coil

Method used

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  • Control method of head-to-tail differential burning of x80 pipeline steel slab
  • Control method of head-to-tail differential burning of x80 pipeline steel slab

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Embodiment 1

[0023] The specifications of the X80 pipeline steel slab are: 10920mm×1700mm×230mm (length×width×thickness), and the slab is cold-packed. The total heating time is 180 to 240 minutes, the soaking time is 30 to 60 minutes, and the furnace temperature is 1180±20°C. Control the opening degree of the burners in each heating section of the heating furnace: the opening degrees of the flame regulating burners 5 on the left and right sides of the preheating section 1 are both 90 degrees; the opening degrees of the flame regulating burners 5 on the left and right sides of the heating section 2 are respectively 60 degrees and 90 degrees; the opening degrees of the flame regulating burners 5 on the left and right sides of the second heating section 3 are 60 degrees and 90 degrees respectively; the opening degrees of the flame regulating burners 5 on the left and right sides of the heating section 4 are respectively 60 degrees and 90 degrees , The opening degree of the heating flat flame ...

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Abstract

The invention discloses a head-tail difference steel burning control method for X80 pipeline steel plate slab. The head-tail difference steel burning control method is characterized in that thermal load of burner nozzles is changed by changing opening degree of burner nozzles at a pre-heating section, a primary heating section, a secondary heating section and an uniform heating section of a heating furnace. The head-tail difference steel burning control method can ensure that the tail temperature when plate slab discharges is higher than the head temperature by about 20 DEG C, so that the technical problem that a coiling temperature hit rate is low as the tail temperature of middle slab is relatively great is solved.

Description

technical field [0001] The invention relates to a process control technology of a steel rolling heating furnace, in particular to a method for controlling the head-to-tail differential firing of an X80 pipeline steel slab. Background technique [0002] Pipeline steel is widely used in oil, natural gas, gas energy and other transportation fields, which is directly related to the development of the national economy and even the national energy strategy security. Major steel companies are paying more and more attention to the research and development and production of pipeline steel. X80 grade hot-rolled coil for pipeline is a high-strength pipeline steel developed to meet the demand of pipeline steel for high pressure resistance and large diameter. The production of hot-rolled coils for X80 grade pipelines mainly adopts hot-rolling process at present, and the hot-rolling process mainly includes three main processes of heating, rolling and cooling, and the heating process is on...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D9/70C21D11/00
CPCC21D9/70C21D11/00
Inventor 白海瑞袁晓鸣杨志
Owner INNER MONGOLIA BAOTOU STEEL UNION
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