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Structure for tuyere section in blast furnace

A tuyere and blast furnace technology, applied in tuyere, furnace, furnace cooling, etc., can solve problems such as inability to realize production operations, disturbing the uniformity of the swivel area in the furnace, etc.

Inactive Publication Date: 2015-01-07
NIPPON STEEL & SUMIKIN ENG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] If the position of the tuyere 8 on the inner surface of the blast furnace deviates like this, the uniformity in the circumferential direction of the inner turning zone in the furnace which is important in the blast furnace operation will be disturbed, and stable production operations (reduction reaction, load, etc.) cannot be realized. decline)

Method used

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  • Structure for tuyere section in blast furnace
  • Structure for tuyere section in blast furnace
  • Structure for tuyere section in blast furnace

Examples

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Embodiment Construction

[0034] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0035] Such as figure 1 As shown, the tuyere portion structure 20 of the present embodiment has: an air supply pipe 31, which is fixed on the furnace shell 21; a tuyere 32, which is fixed on the top (front end) of the air supply pipe 31; a flexible joint 34, which is connected to the air supply Pipe 31 and tuyere elbow 33.

[0036] Since the hot air of high temperature and high pressure supplied into the blast furnace passes through the inside of the flexible joint 34 , a metal bellows type flexible joint is used as the flexible joint 34 .

[0037] A flange (flange portion) for installing the tuyere is formed at the tip of the blower pipe 31, and the tuyere 32 is fixed to the flange by bolts or the like.

[0038] The air supply pipe 31 has a flange at the end opposite to the tuyere 32 , and the flange is connected with a flexible joint 34 . The flexible joint 34 h...

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PUM

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Abstract

Provided is a structure for a tuyere section in a blast furnace, the structure for a tuyere section being capable of preventing gas leakage, assimilating disparity in furnace body side / circular pipe side thermal deformation, and maintaining the position of the tip-end of a tuyere at a specific position in the blast furnace. The structure (20) for a tuyere section in a blast furnace is provided with: a blow pipe (31) which is fixed to a shell (21); a tuyere (32) which is fixed to the tip-end of the blow pipe (31); and a flexible joint (34) which connects the blow pipe (31) and a tuyere stock (33). A tuyere section stave cooler (23) is placed on the inside of the shell (21) at the periphery of the tuyere (32), the stave cooler (23) forming the inner surface of the furnace.

Description

technical field [0001] The present invention relates to a tuyere portion structure of a blast furnace. Specifically, the present invention relates to a tuyere portion structure usable as a tuyere portion of a blast furnace in which staves are provided around the tuyere portion. Background technique [0002] In the prior art, a blast furnace is provided with a plurality of tuyeres (components) at predetermined height positions of the furnace body. In addition, an air supply pipe is connected to each tuyere from a ring pipe arranged around the furnace body, and hot air is supplied from the air supply pipe to the tuyere, and then the hot air is blown into the furnace through each tuyere (refer to Patent Document 1). [0003] Such as image 3 As shown, on the tuyere part of the blast furnace in the prior art, the tuyere 8 that sends high-temperature air into the furnace is held by the tuyere bracket 9, and the tuyere bracket 9 is held by the tuyere bracket metal holding part 10,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B7/16
CPCF27B1/16C21B7/163C21B7/106F27B1/24F27D1/12F27D2009/0002F27B1/14F27D1/045
Inventor 北川利也古馆昭二石川裕信
Owner NIPPON STEEL & SUMIKIN ENG CO LTD