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Wear-resisting blast-furnace tuyere small jacket

A technology of small tuyeres and blast furnaces, applied in the direction of tuyeres, etc., which can solve the problems of poor thermal conductivity, low service life, and peeling of the surfacing layer

Active Publication Date: 2011-09-14
YANTAI WANLONG VACUUM METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Blast furnace tuyere small sleeve is an important process part used for air supply and coal injection in ironmaking blast furnace. Due to the wear of coke particles and furnace charge rotating at high speed in the blast furnace revolving area, and the slag peeling off wears the front end and outer wall of the tuyere, the small tuyere sleeve wears quickly. The service life of the small tuyere sleeve decreases sharply. When the furnace condition is not smooth or the slag peels off, the small tuyere sleeve of the blast furnace is severely worn, and the 25mm copper at the front end is worn off in less than one month. It should be used for more than 9 months. The existing technology mainly relies on surfacing wear-resistant high-nickel-chromium alloy to solve the wear of the small tuyere sleeve. However, because the thermal conductivity of the surfacing layer is not good, it is easy to crack and peel off, the use effect is not good, and the service life is low.

Method used

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Examples

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Effect test

Embodiment 1

[0021] Example 1, such as figure 1 , figure 2 As shown, a wear-resistant blast furnace tuyere cover of the present invention includes a tuyere cap 1, a tuyere seat 2 and a water channel 3, wherein the tuyere cap 1 and the tuyere seat 2 are made of copper, and the front end and the outer wall of the tuyere cap 1 are embedded or cast Mechanically inlaid with a number of foam-shaped cylindrical inlays 4, the depth of the inlays 4 embedded in the copper matrix is ​​4 mm, the gap 5 between the inlays 4 is 10 mm, and the gaps are filled by the copper matrix. The diameter of the inlays 4 is 6 mm, inlay 4 is made of carbide. The inlay 4 can also be made of zirconium corundum, silicon carbide, ceramic, mullite or aluminum corundum.

Embodiment 2

[0022] Example 2, such as image 3 As shown, the front end and the outer wall of the tuyere cap of a wear-resistant blast furnace tuyere cover are inlaid or mechanically inlaid with an inlay 4b. The depth of the inlay 4b embedded in the copper matrix is ​​2 mm, and several inlays 4b are processed. A circular hole, wherein the circular hole is a through hole, their diameter is 10 mm, the gap between the circular holes is 6 mm, the circular hole is filled with a copper matrix, and the inlay 4b is made of hard alloy. The inlay 4b can also be made of zirconium corundum, silicon carbide, ceramic, mullite or aluminum corundum.

Embodiment 3

[0023] Example 3, such as Figure 4 As shown, the front end and outer wall of the tuyere cap of a wear-resistant blast furnace tuyere cover are inlaid or mechanically inlaid with several annular inlays 4c. The width of the object 4c is 6 mm, the gap 6 between the annular inlays 4c is 10 mm, wherein the gap is filled with a copper matrix, and the inlay 4c is made of hard metal. The inlay 4c can also be made of zirconium corundum, silicon carbide, ceramic, mullite or aluminum corundum.

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Abstract

The invention relates to a blast-furnace tuyere small jacket for ironmaking blast furnace, which improves the service life by improving abrasive resistance and thermal conductivity. The wear-resisting blast-furnace tuyere small jacket comprises a tuyere cap, a tuyere base and a water channel, wherein the tuyere cap is made of copper, inserts are arranged at the front end and the outer wall of thetuyere cap, and a plurality of holes are formed on the inserts, or a plurality of inserts are arranged at the front end and the outer wall of the tuyere cap, and gaps are reserved among the inserts; and the inserts are made of wear-resisting and high-temperature resistant materials. Copper substrates on the peripheries of the inserts play the effect of heat conduction, and the inserts play the effect of wearing resistance, so the service life of the blast-furnace tuyere small jacket is improved.

Description

technical field [0001] The invention relates to an ironmaking blast furnace, in particular to a small blast furnace tuyere cover for an ironmaking blast furnace. Background technique [0002] Blast furnace tuyere small sleeve is an important process part used for air supply and coal injection in ironmaking blast furnace. Due to the wear of coke particles and furnace charge rotating at high speed in the blast furnace revolving area, and the slag peeling off wears the front end and outer wall of the tuyere, the small tuyere sleeve wears quickly. The service life of the small tuyere sleeve decreases sharply. When the furnace condition is not smooth or the slag peels off, the small tuyere sleeve of the blast furnace is severely worn, and the 25mm copper at the front end is worn off in less than one month. It should be used for more than 9 months. The existing technology mainly relies on surfacing wear-resistant high-nickel-chromium alloy to solve the wear of the small tuyere sle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B7/16
Inventor 王风德赵景山李秀梅卢建华王东姚志强马爱红
Owner YANTAI WANLONG VACUUM METALLURGY
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