A method for protecting and repairing the furnace skin after the cooling wall of the blast furnace is burned

A repair method and stave technology, which is applied to cooling devices and other directions, can solve problems such as difficult online replacement of staves, potential safety hazards, and harsh conditions, so as to increase the cooling effect, compensate for the thermal shock in the furnace, and reduce weld cracking. Effect

Active Publication Date: 2020-11-17
BAOSHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0008] The task of the present invention is to provide a method for protecting and repairing the furnace skin after the blast furnace stave is burned. The repair method can overcome the difficulty in replacing the stave on-line after the stave of the blast furnace is damaged, and requires harsh conditions and potential safety hazards during replacement. , The disadvantage of large construction costs, solves the online repair problem that has been plaguing the industry for a long time

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  • A method for protecting and repairing the furnace skin after the cooling wall of the blast furnace is burned
  • A method for protecting and repairing the furnace skin after the cooling wall of the blast furnace is burned
  • A method for protecting and repairing the furnace skin after the cooling wall of the blast furnace is burned

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Embodiment Construction

[0026] The present invention will be described in more detail below in conjunction with the accompanying drawings and embodiments.

[0027] In order to allow readers to understand the present invention more comprehensively, please refer to figure 1 , figure 2 Shown, the blast furnace related to the present invention is introduced as follows:

[0028] figure 1 It is the blast furnace 1 involved in the present invention. The structure of the blast furnace 1 is from bottom to top, including the furnace hearth, bosh, furnace waist, lower part of the furnace shaft, middle part of the furnace shaft, upper part of the furnace body, and furnace throat. Refractories, cooling equipment, furnace skins. The cooling equipment 2 of the blast furnace is to form staves connected in series with each other.

[0029] Please refer again figure 2 As shown, on the blast furnace wall, there is a refractory material 21 close to the furnace cavity. The right side of the refractory material 21 i...

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Abstract

The invention discloses a furnace skin protecting and repairing method adopted after burning loss of a blast furnace cooling wall. The method comprises the following steps that according to the size of an area of damaged blast furnace skin, a manufactured cooling device is installed on the damaged blast furnace skin, then the damaged furnace skin is shifted and taken out or perforated, then furnace burden in the furnace is blocked and repair welding is conducted. According to the method, the cooling wall does not need to be replaced, only the cooling device which is simple in structural form is adopted, the structure of the cooling device is optimized, the cooling effect of the cooling device in a zone is improved, and heat shock in the furnace caused by falling of the cooling wall is madeup; and the repairing method can be used for repairing the furnace skin of the blast furnace on line, and the method is simple and feasible; the manufacturing cost is low, and particularly on the damaged blast furnace skin, five cooling plates are set in a group and are distributed in an X shape on the damaged furnace skin; and the X-shaped structure has the advantages that air flow and the furnace burden can be prevented from being shaken simultaneously, and the welding seam cracking phenomenon of the cooling device can be reduced.

Description

Technical field: [0001] The invention relates to blast furnace maintenance for metallurgical smelting, in particular to a method for protecting and repairing furnace skin after a blast furnace stave is burnt. Background technique [0002] During the production and operation of large-scale iron-making blast furnaces, a large amount of heat from the refractory materials of the furnace body is quickly discharged by the cooling water of the cooling system, so as to maintain the physical properties of the refractory materials of the furnace body and maintain the stable operating furnace type of the blast furnace. [0003] The cooling stave is a form of the cooling system of the blast furnace. After several years of operation of the blast furnace cooling stave, due to the decline of the cooling water capacity of the blast furnace and the accumulation of harmful elements in the blast furnace, especially the cracking of the weld seam at the root of the blast furnace stave tube, In p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B7/10
CPCC21B7/10
Inventor 缪伟良张世斌
Owner BAOSHAN IRON & STEEL CO LTD
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