Tuyere cover of blast furnace

Abstract

The present invention relates to blast furnace part, and is one kind of tuyere cover. Unlike available tuyere cover, which is made of copper and has high copper consumption and poor inner wall cooling effect, the tuyere cover of the present invention consists of a front body, a back body, a steel frame, a front cap and a back cap. The front body and the front cap are made of copper through extrusion and casting, the back body and the back cap is cast with boiler steel, and the steel frame is welded with common steel plate and provided with several inner and outer water passage partition layers. The tuyere cover of the present invention has lower copper consumption, low cost, raised machining precision, double circulating water passage and long service life.

Description

1. Technical field [0001] The invention relates to a component on an ironmaking blast furnace, in particular to a small sleeve for a blast furnace tuyere. 2. Background technology [0002] Blast furnace tuyere cover consists of three sets of large, medium and small. The small set is at the front and is closest to the furnace. It is a vulnerable part of the blast furnace due to harsh working conditions, severe thermal corrosion, and short service life. Existing blast furnace tuyeres (such as figure 1 (shown) is formed by welding the front cap and the body, both of which are made of pure copper. In the front chamber, the water flows from the front chamber along the outer wall around the water channel and is discharged from the water outlet to exchange heat for the small sleeve. Although this product has achieved a certain effect on the cooling of the front cap, but due to the large cavity structure of the body, the cooling water along the inner wall is likely to form a dead ...

AI Technical Summary

Problems solved by technology

Although this product has achieved a certain effect on the cooling of the front cap, but due to the large cavity structure of the body, the cooling water along the inner wall is likely to form a dead water area, and the cooling effect on the inner wall of the small sleeve is poor, and because the body is cast, the surface is not machined Rough, easy to scale, block the waterway, affect the cooling effect

And the body is made of pure copper, the product cost is high, and the overall service life is short

[0003] Patent document CN9311016416 discloses a technology of "splitting type bimetallic welding tuyere and its manufacturing method". Only the inner core part adopts steel parts, and only a few ribs are arranged at the front end to form water channels, while the inner and outer surfaces of the front end of the small sleeve It cannot be cooled well, so it is not suitable for small blast furnaces.

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