A Method for Replacing Large Set of Blast Furnace Tuyere

A technology of tuyere and large set, which is applied in the field of replacing large set of blast furnace tuyere, can solve the problems of long replacement time and difficulty in replacing large set of tuyere, and achieves the effect of safe replacement and shortening of time.

Inactive Publication Date: 2015-10-21
PANGANG GROUP CHENGDU STEEL & VANADIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The operation of replacing the large tuyere cover is a routine operation performed in the off-air state after the large tuyere cover of the blast furnace is damaged or severely burned. At present, the replacement of the large tuyere cover has disadvantages such as difficult replacement and long replacement time.

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  • A Method for Replacing Large Set of Blast Furnace Tuyere

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Embodiment Construction

[0020] Hereinafter, the blast furnace tuyere cover and the method for replacing the blast furnace tuyere cover according to the present invention will be described in detail with reference to exemplary embodiments.

[0021] figure 1 It is a side sectional view of a blast furnace tuyere device. Such as figure 1 As shown, the blast furnace tuyere equipment includes a middle tuyere cold water pipe 1, a large tuyere sealing cover 2, a large tuyere 4, a small tuyere 6, a middle tuyere 10, a small tuyere cold water pipe 5, and a small tuyere pressing device 7. The sleeve pressing device 9 and the flange seat 8 in the tuyere. The flange seat 8 is welded on the furnace shell 3 at the tuyere of the blast furnace. The large tuyere set 4 is a cavity water-cooled tuyere, that is, the large tuyere set is a cavity structure with water cooling inside, and the large tuyere set 4 passes through the fastener 11 ( For example, bolts) are connected with the flange seat 8, specifically, a flang...

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Abstract

The invention provides a method for replacing a tuyere-cooler casing of a blast furnace. The method comprises the following steps: selecting at least two preset points on the tube wall, far away from connected and overlapped sections of the tuyere-cooler casting and a flange base, of the tuyere-cooler casting; breaking open the tube wall of the tuyere-cooler casting by adopting a melting cutting way along the busbar direction of the tuyere-cooler casting by taking the preset points as starting points so as to cut the tube wall of the tuyere-cooler casting between the preset points and the inner end of the tuyere-cooler casting furnace into a plurality of parts, wherein the area of the end face of each part is smaller than 1 / 2 of that of the end face of the tuyere-cooler casting, and a space is formed at least between two of the parts through melting; and dismounting the tuyere-cooler casting from the blast furnace in a direction far away from the blast furnace. By adopting the method provided by the invention, the tuyere-cooler casting can be rapidly broken open without damaging a flange base, thus the tuyere-cooler casting is rapidly dismounted and the time for replacing the tuyere-cooler casting is shortened.

Description

technical field [0001] The invention belongs to the technical field of blast furnace front operation, and more specifically relates to a method for replacing a large set of blast furnace tuyere. Background technique [0002] The blast furnace tuyere is a key component to ensure the normal production of the blast furnace, and is a key process part on the blast furnace of the ironworks in the iron and steel production. The blast furnace tuyere usually includes a large tuyere set, a middle tuyere set (also known as the second set of tuyere) and a small set of tuyere (also called the third set of tuyere). Usually, a flange seat is welded on the blast furnace shell, and the large diameter of the large set of tuyere end (that is, the outer end of the furnace) is connected with the flange seat by bolts so as to be assembled with the furnace body, and the small-diameter end of the large tuyere sleeve (that is, the inner end of the furnace) is sleeved on the large-diameter end of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B7/16
Inventor 潘炳利张岳
Owner PANGANG GROUP CHENGDU STEEL & VANADIUM
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