Tuyere small sleeve

A technology of small tuyere cover and air outlet, applied in the direction of tuyere, can solve the problems of large difference in expansion coefficient and easy to fall off, and achieve the effect of improving the service life, not easy to fall off, and prolonging the service life.

Inactive Publication Date: 2015-07-15
MCC CAPITAL ENGINEERING & RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large difference in linear expansion coefficient between the surfacing material and the copper material, it is easy to fall off under working conditions

Method used

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  • Tuyere small sleeve
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specific Embodiment approach

[0043] Such as figure 1 Shown, be a kind of tuyere small cover that the present invention proposes, and it comprises:

[0044]Body 1, which is an annular body with a hollow side wall 11, and an air supply channel 12 is formed inside the annular body; one end of the body 1 is an air inlet 13, and the other end is an air outlet 14; the grid cover 2 is set on the body Outside the air outlet 13 of 1, the grid cover 2 extends along the outer wall of the body 1, and the extension of the grid cover 2 forms a mesh protective layer frame 21 on at least a part of the outer wall of the body 1, so as to cover at least a part of the outer wall of the body 1 A protective layer 24 is formed on the body 1, that is, a protective layer 24 is formed on a part or the entire outer wall of the body 1; the mesh protective layer frame 21 is composed of a plurality of cells, and in the state of blast furnace production, liquid substances such as slag iron in the furnace will into each unit cell of th...

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Abstract

The invention provides a tuyere small sleeve. The tuyere small sleeve comprises a body, a grid sleeve and a flow guide device, wherein the body is of an annular body with a hollow side wall; an air feeding channel is formed in the annular body; an air inlet is formed in one end of the body; an air outlet is formed in the other end of the body; the grid sleeve covers the exterior of the air outlet of the body and extends along the outer wall of the body; a grid-shaped protection layer framework is formed in the outer wall of the body by an extension part of the grid sleeve; the flow guide device is arranged at the interior of the hollow side wall close to the one end of the air outlet; and the flow guide device comprises a cylindrical flow guide partition plate and at least two annular flow guide rib plates. According to the tuyere small sleeve, a protection structure formed in the grid-shaped protection layer framework is capable of preventing liquid materials such as iron slag in an iron-smelting blast furnace from repeatedly and directly falling onto the outer wall of the tuyere small sleeve; the melting loss and the abrasion of the outer wall of the tuyere small sleeve are avoided; and the service life of the tuyere small sleeve is prolonged. The grid-shaped protection layer framework of the tuyere small sleeve is low in possibility of falling off and is independent of the tuyere small sleeve, so that the grid-shaped protection layer framework is free of influence on the overall cooling performance of the tuyere small sleeve.

Description

technical field [0001] The invention relates to an ironmaking blast furnace equipment, in particular to a small tuyere sleeve. Background technique [0002] The small tuyere is the pipe terminal equipment for the hot air to enter the blast furnace. Due to the harsh working environment of the small tuyere cover, it is difficult to guarantee long-term normal operation. Since the 1990s, China has introduced "through-flow" tuyere from Japan, which uses large water volume, high flow rate, and high water supply pressure to strengthen the cooling of the front end of the tuyere small sleeve and prolong its life. After being fully promoted in China, the tuyere cover of general iron factories can reach more than half a year of life under normal working conditions. [0003] In the practical application of "through-flow" tuyere, the following damage forms mainly occur: 1) Melting loss, which mainly occurs on the outer surface of the upper part of the front end of the tuyere small slee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B7/16
Inventor 王建同全强杜鹏宇索延帅祁四清罗凯
Owner MCC CAPITAL ENGINEERING & RESEARCH
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