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Blast furnace soaking furnace examination and repair method

A technology for braising furnaces and blast furnaces, which is applied in the field of braising furnace maintenance for blast furnaces, and can solve problems such as long time-consuming resumption of production and long maintenance period

Inactive Publication Date: 2007-01-31
CHONGQING IRON & STEEL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the disadvantages of long maintenance period and time-consuming resumption of production in conventional blast furnace maintenance methods in the prior art, the purpose of the present invention is to provide a brand-new blast furnace conventional maintenance method, which can shorten the maintenance period under the premise of ensuring safety, and can resume production soon

Method used

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  • Blast furnace soaking furnace examination and repair method
  • Blast furnace soaking furnace examination and repair method

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Embodiment Construction

[0018] While implementing this method, you can refer to figure 1 , figure 2 , to help understand, where 1-working platform, 2-intake pipe, 3-outlet pipe, 4-burden material, 5-tuyere, 6-taphole, 7-compressed air pipe, 8-large flange of furnace top, 11 -I-beam support beam, 12-channel steel secondary beam, 13-steel plate, 14-asbestos cloth, 15 river sand.

[0019] Introduce in detail the concrete steps of blast furnace braising furnace maintenance method of the present invention below:

[0020] 1. First, determine the height of the material surface in the furnace so that the material surface in the furnace is 1.2-1.5 meters away from the bottom of the working platform to be built, and the height of the working platform is determined according to the maintenance site.

[0021] 2. When the furnace is not turned off and the wind is off, seal all the tuyere and taphole of the furnace with refractory mud.

[0022] 3. Open an access channel on the furnace wall for construction per...

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Abstract

The invention discloses an examine and repair method for blast furnace. Wherein, first, determining the material surface height; when the furnace is flameout and delay, sealing all its tuyeres and tapholes with flame-proof mud; arranging access path on furnace wall; building sealed work platform on furnace to arrange inlet and outlet steel pipes; finally, examining and repairing the damaged position. This method cuts half the project time nearly, quickens the reproduction period to eight hours, and decreases total cost greatly.

Description

technical field [0001] The invention relates to the overhaul technology of the blast furnace in a steelmaking plant, in particular to a method for overhauling the blast furnace. Background technique [0002] The maintenance of blast furnaces in steelworks is generally divided into overhaul, medium maintenance and routine maintenance. The overhaul cycle is generally 8-10 years, and the construction period is generally 50-60 days; the medium repair cycle is generally 4-5 years, and the construction period is generally 35-45 days. During the smelting and production process of the blast furnace, the refractory lining in the upper part of the furnace (below the large flange of the furnace top) is burned and collapsed, the steel bricks of the furnace throat are burned, and the large and small charging bells on the furnace top are burned and cannot be sealed (especially for high-pressure furnaces). As long as there is a problem in any of the above parts, it will affect production ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B7/00
Inventor 李福初吕凤华
Owner CHONGQING IRON & STEEL (GRP) CO LTD
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