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Judgment method of erosion degree of blast furnace iron storage type main ditch and repair method of blast furnace iron storage type main ditch

A technology for iron storage and blast furnace, applied in the direction of discharge device, etc., can solve the problem of inability to accurately and effectively repair the main trench of iron storage type, and achieve the effect of avoiding accidents caused by burn-through, ensuring normal operation, and avoiding burn-through.

Active Publication Date: 2021-04-02
SGIS SONGSHAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the deficiencies of the existing technology, the purpose of the embodiment of the present application includes providing a method for judging the erosion degree of the blast furnace iron storage type main ditch and a method for repairing the blast furnace iron storage type main ditch, so as to improve the technology that cannot accurately and effectively repair the iron storage type main ditch question

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  • Judgment method of erosion degree of blast furnace iron storage type main ditch and repair method of blast furnace iron storage type main ditch

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Effect test

Embodiment 1

[0058] This embodiment provides a method for judging the erosion degree of a blast furnace iron storage type main ditch, including:

[0059] After the iron storage type main ditch is put into use for a certain period, the statistical iron flux P=(P 1 +P 2 +P 3 +...+P n )=80,600 tons. The castable layer thickness N of the iron storage type main ditch is 450mm.

[0060] Calculate the erosion amount of the molten iron surface layer of the iron storage type main ditch castable as: N 1 =80600×0.002=161.2mm, the thickness of the molten iron surface layer of the main ditch castable is: N-N 1=450-161.2=288.8mm;

[0061] Calculation of the erosion amount N of the bottom layer of the iron storage type main ditch castable 2 =0.5×161.2=80.6mm, the thickness of the bottom layer of the main ditch castable is: N-N 2 =450-80.6=369.4mm.

[0062] The column of the iron storage main ditch is equipped with an intelligent monitoring device, and the intelligent monitoring device is used to...

Embodiment 2

[0065] This embodiment provides a method for judging the erosion degree of a blast furnace iron storage type main ditch, including:

[0066] After the iron storage type main ditch is put into use for a certain period, the statistical iron flux P=(P 1 +P 2 +P 3 +...+P n )=93,600 tons. The castable layer thickness N of the iron storage type main ditch is 450mm.

[0067] Calculate the erosion amount of the molten iron surface layer of the iron storage type main ditch castable as: N 1 =93600×0.002=187.2mm, the thickness of the molten iron surface layer of the main ditch castable is: N-N 1 =450-187.2=262.8mm;

[0068] Calculation of the erosion amount N of the bottom layer of the iron storage type main ditch castable 2 =0.5×187.2=93.6mm, the thickness of the bottom layer of the main ditch castable is: N-N 2 =450-93.6=356.4mm.

[0069] The column of the iron storage main ditch is equipped with an intelligent monitoring device, and the intelligent monitoring device is used t...

Embodiment 3

[0072] This embodiment provides a method for judging the erosion degree of a blast furnace iron storage type main ditch, including:

[0073] After the iron storage type main ditch is put into use for a certain period, the statistical iron flux P=(P 1 +P 2 +P 3 +...+P n )=155,000 tons. The castable layer thickness N of the iron storage type main ditch is 450mm.

[0074] Calculate the erosion amount of the molten iron surface layer of the iron storage type main ditch castable as: N 1 =155000×0.002=310mm, the thickness of the molten iron surface layer of the main ditch castable is: N-N 1 =450-310=150mm;

[0075] Calculation of the erosion amount N of the bottom layer of the iron storage type main ditch castable 2 =0.5×310=155mm, the thickness of the bottom layer of the main ditch castable is: N-N 2 =450-155=295mm.

[0076] The column of the iron storage main ditch is equipped with an intelligent monitoring device, and the intelligent monitoring device is used to monitor ...

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Abstract

The invention relates to a blast furnace iron storage type main runner erosion degree judgment method and a blast furnace iron storage type main runner repairing method, and belongs to the technical field of iron making. The blast furnace iron storage type main runner erosion degree judgment method comprises the steps of determining the main runner castable molten iron liquid level layer erosion amount and the main runner castable bottom layer erosion amount according to the total iron flux; and determining the thickness of the molten iron surface layer of the main channel castable and the thickness of the bottom layer of the main channel castable according to the thickness of the main channel castable layer, the erosion amount of the molten iron surface layer of the main channel castableand the erosion amount of the bottom layer of the main channel castable, and judging the erosion degree of the main runner according to the thickness of the molten iron surface layer of the main runner castable and the thickness of the bottom layer of the main runner castable. The method is accurate, and a reliable judgment result can be provided for an operator. And meanwhile, operators can repair or re-pour the iron storage type main channel in time conveniently, the iron storage type main channel is prevented from being burnt through, and the normal operation of the iron storage type main channel of the blast furnace is guaranteed.

Description

technical field [0001] The present application relates to the technical field of ironmaking, and in particular to a method for judging the erosion degree of a blast furnace iron storage type main ditch and a blast furnace iron storage type main ditch repair method. Background technique [0002] At present, the main tapping ditch in front of a large blast furnace is generally an iron storage type main ditch, and the iron storage type main ditch is completed by a one-time pouring process. The iron storage main trench includes from the inside to the outside: pouring layer, refractory brick layer, heat insulation layer, steel shell layer and hearth hardening layer. After working for a period of time in front of the large blast furnace iron storage type main ditch, whether there is erosion on the side wall and bottom of the main ditch, and the degree of erosion, there is no reliable technical plan to make a judgment. As a result, domestic blast furnace iron storage type main ditc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B7/14
CPCC21B7/14
Inventor 陈生利颜伟陈开泉蔡林徐国庆欧阳军蒙万贵
Owner SGIS SONGSHAN CO LTD
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