CN216838040U

CN216838040U - Tuyere small sleeve with embedded composite wear-resistant lining opening for blast furnace

Info

Publication number: CN216838040U
Application number: CN202123205310.1U
Authority: CN
Inventors: 张露
Original assignee: Sichuan Metallurgical Equipment Development Co ltd
Current assignee: Sichuan Metallurgical Equipment Development Co ltd
Priority date: 2021-12-16
Filing date: 2021-12-16
Publication date: 2022-06-28
Anticipated expiration: 2031-12-16

Abstract

The utility model discloses a tuyere small sleeve of embedded compound wear-resisting lining mouth for blast furnace comprises pressing from both sides cover 100 and the cooling water honeycomb duct 20 of arranging in the cover in, presss from both sides the inboard coal outlet port of cover and has put the recessed installation step 42 of installation, and compound wear-resisting lining mouth 50 is fixed on the recessed installation step of endotheca coal outlet port through keeping off nail 41, and compound wear-resisting lining mouth adopts the double-deck composite construction of the wear-resisting ceramic layer in stainless steel base. The utility model discloses a compound wear-resisting lining mouth has solved ceramic material stability on the tuyere small sleeve effectively, has improved the life of tuyere small sleeve.

Description

Tuyere small sleeve with embedded composite wear-resistant lining opening for blast furnace

Technical Field

The utility model belongs to metallurgical blast furnace equipment field, especially be used for to the blast furnace in send hot-blast important equipment.

Background

The blast furnace tuyere small sleeve is important equipment in a blast furnace air inlet system and is used for feeding hot air into a blast furnace. The traditional tuyere small sleeve is made of over 95 percent red copper and has a cavity structure, cooling water is introduced into the tuyere small sleeve, and the tuyere small sleeve mainly comprises a flange, a fluid director, an outer sleeve and an inner sleeve (figure 1). The tuyere small sleeve directly extends into the blast furnace, the front end of the tuyere small sleeve is in a high-temperature environment of nearly 2000 ℃, then liquid high-temperature slag iron is arranged inwards, the temperature of a slag iron melt is above 1400 ℃, and the temperature of hot air passing through the tuyere small sleeve is above 1000 ℃, so that the working environment of the tuyere small sleeve is extremely severe.

In order to reduce cost, increase efficiency and reduce the consumption of high-quality coke, the steel enterprises can spray relatively cheap coal powder into the blast furnace (figure 2). As the coal gun inevitably has the condition that the coal powder washes the inner sleeve of the small tuyere sleeve in the using process, the inner sleeve is abraded to cause water leakage. The water leakage condition of the tuyere small sleeve seriously influences the safe production of the blast furnace, and serious accidents such as furnace wall adhesion, furnace hearth accumulation, iron notch splashing, furnace cooling and even furnace hearth freezing can be caused if the water leakage condition is not found in time.

At present, the solution is that the tuyere small sleeve is sleeved with: alloying the surface; surface coating; plasma spraying; surfacing alloy; the tuyere is directly lined with a ceramic wear-resistant layer; pasting ceramic, pouring wear-resistant materials and the like.

Because the sleeve body of the tuyere small sleeve is generally made of copper material with good heat transfer effect, and the ceramic wear-resistant layer is directly laid on the sleeve body, the ceramic wear-resistant layer has poor stability in actual use, is easy to lose and inconvenient in process installation, prolongs the service life of the tuyere to different degrees, but the comprehensive effect is not ideal and the process is complex.

SUMMERY OF THE UTILITY MODEL

In view of the above insufficiency of the prior art, the utility model relates to a design a tuyere small sleeve of embedded compound wear-resisting lining mouth for blast furnace, with wear-resisting lining mouth embedding tuyere small sleeve endotheca, solved ceramic material stability on tuyere small sleeve effectively through compound wear-resisting lining mouth, improved the life of tuyere small sleeve, overcome the above shortcoming of prior art.

The purpose of the utility model is realized through following means.

The tuyere small sleeve with the embedded composite wear-resistant lining opening for the blast furnace comprises a jacket 100, a cooling water guide pipe 20 and the like, wherein the cooling water guide pipe 20 is arranged in the jacket, a coal outlet of the inner sleeve is provided with a concave mounting step 42, the composite wear-resistant lining opening 50 is fixed on the concave mounting step of the coal outlet of the inner sleeve through a nail blocking mechanism, and the composite wear-resistant lining opening 50 is of a double-layer composite structure of a stainless steel substrate wear-resistant ceramic layer.

The detachable embedded wear-resistant lining port is of a double-layer composite structure, namely, the detachable embedded wear-resistant lining port is composed of a stainless steel inner layer and a wear-resistant ceramic layer laid on the stainless steel inner layer.

Adopt the utility model discloses a structure has solved ceramic material stability on the tuyere small sleeve effectively through compound wear-resisting lining mouth, has improved the life of tuyere small sleeve.

Drawings

FIG. 1 is a schematic diagram of the operation of a conventional tuyere stock of the prior art.

FIG. 2 is a schematic diagram of a prior art abnormal coal injection.

Figure 3 is a longitudinal section view of the tuyere small sleeve of the utility model.

Fig. 4 is a schematic view of the tuyere small sleeve main body of the utility model.

Fig. 5 is a longitudinal sectional view of the composite wear-resistant lining opening of the tuyere small sleeve of the utility model.

Detailed Description

The structure of the present invention will be described in detail with reference to the accompanying drawings.

As can be seen from the attached drawings 3-5, the tuyere small sleeve with the embedded composite wear-resistant lining opening for the blast furnace of the utility model consists of a jacket 100 and a cooling water guide pipe 20 arranged in the jacket, wherein a coal outlet opening at the inner side of the jacket is provided with a concave mounting step 42, and the composite wear-resistant lining opening 50 is fixed on the concave mounting step of the coal outlet opening of the inner jacket through a stop nail 41. In the figure, 10 is a cooling water swirling chamber. During installation, a stop nail 41 is formed on the surface 43 by overlaying copper welding rods (wires) and is used for fixing the composite wear-resistant liner 50 so as not to generate displacement.

The removable embedded wear-resistant liner 50 is of a two-layer composite construction, and typically, as shown in fig. 5, the wear-resistant liner is of a stainless steel-based wear-resistant ceramic layer structure.

In practical application, the nail blocking mechanism can fix the composite wear-resistant lining opening in various ways, such as multi-point surfacing, continuous surfacing and the like. When the wear-resistant lining opening is replaced, the stop nail is ground off to finish the dismounting of the wear-resistant lining opening.

Claims

1. A tuyere small sleeve with an embedded composite wear-resistant lining opening for a blast furnace consists of a jacket (100) and a cooling water guide pipe (20) arranged in the jacket, wherein a coal outlet at the inner side of the jacket is provided with a concave mounting step (42); the composite wear-resistant lining port (50) is fixed on a concave mounting step of the coal outlet port of the inner sleeve through a stop nail (41);

the composite wear-resistant lining opening (50) is of a double-layer composite structure of a stainless steel substrate wear-resistant ceramic layer.