CN2799576Y

CN2799576Y - Tuyere of blast furnace

Info

Publication number: CN2799576Y
Application number: CN 200520091270
Authority: CN
Inventors: 龙静
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-06-10
Filing date: 2005-06-10
Publication date: 2006-07-26
Anticipated expiration: 2015-06-10

Abstract

The utility model discloses a tuyere of a blast furnace of an ironmaking blast furnace. An end head body (1) which is made of pure copper and provided with a water ingress hole (2) and a water egress hole (3), wherein the lower end of the end head body (1) is in welding connection with a sleeve barrel body (7) which is made of a pure copper plate and provided with a cooling inner cavity, and the sleeve barrel body (7) is formed by that an inner barrel body (6) is in welding connection with an outer barrel body (5). A flow guiding body (8) of cooling water is arranged in the cooling inner cavity of the sleeve body (7). Wearproof hard alloy layers (4) which are formed in the method of the surfacing are arranged on the outer margin of the bottom part of the sleeve barrel body (7) and on the inner surface of the inner barrel body (6). The utility model can avoid sand holes and sand marks which occur when an already present tuyere of a blast furnace is formed by casting. The utility model has the advantages of smooth body wall, high thermal coefficient, low damaging degree and long service life.

Description

A kind of blast-furnace tuyere

Technical field

The utility model relates to the blast-furnace tuyere of iron-smelting blast furnace.

Background technology

Iron-smelting blast furnace is by the blast-furnace tuyere that is equipped with on it heat air delivery in blast furnace, to provide oxygen to satisfy the needs of smelting the pig iron, wherein nearer apart from the blast-furnace roasting district of temperature higher (1700 ℃) as the blast-furnace tuyere of interior cover air port use, blast-furnace tuyere will bear the thermal radiation of combustion zone and the influence of convection current, also bearing the wearing and tearing of decline logistics, washing away of the abrasion of Coal powder spray and products of combustion and air-flow, and the splashing of scum, the scorification of flowing molten iron, blast-furnace tuyere is under this ten minutes exacting terms, be easy to be damaged, so the length in work-ing life of blast-furnace tuyere will directly influence running period and the product production and the economic benefit of iron-smelting blast furnace.

For a long time, the blast-furnace tuyere that uses as interior cover air port on China's iron-smelting blast furnace mainly is to use cast copper cavity type blast-furnace tuyere (as shown in Figure 1), this blast-furnace tuyere casting, simple in structure, be easy to processing, but because lower (the copper purity 95～98% of cast copper thermal conductivity, thermal conductivity is 186～209w/mk), be prone to sand holes, sand trace and in uneven thickness during casting on the body wall of air port, water coolant is prone to the dead angle when flowing in cooling chamber, therefore be damaged easily, lack work-ing life (generally only using 20～30 days).

Again the cast copper cavity type blast-furnace tuyere was improved to the tubular blast-furnace tuyere of cast copper (as shown in Figure 2) afterwards, in cooling chamber, increased current through-flow body, cooling performance increases, but because the thermal conductivity of cast copper is lower, be prone to sand holes, sand trace during casting, that improves work-ing life is still not obvious, and because shape complicated (having increased the through-flow body in the cooling chamber), the one-step casting moulding is difficulty comparatively, therefore also is difficult to promote the use of.

Summary of the invention

The purpose of this utility model provides a kind of blast-furnace tuyere, this blast-furnace tuyere can overcome cast copper cavity type blast-furnace tuyere and the tubular blast-furnace tuyere of cast copper all weak point, improved its work-ing life.

To achieve these goals, the utility model is the lower end of termination body that has the fine copper matter of prosopyle and posticum thereon, be welded to connect the sleeve body that is welded to connect the fine copper plate system that constitutes by inner barrel and outer cylinder body with cooling inner chamber, in the cooling inner chamber of sleeve body, be equipped with the baffle of water coolant, at sleeve body, on the bottom of sleeve body outer rim and inner barrel internal surface, be equipped with the wearable hard alloy layer of built-up welding.

The utility model is by the termination body that has prosopyle and posticum on it, sleeve body that inner barrel and outer cylinder body constitute and baffle are formed, all adopt between each parts and be welded to connect, the sand holes that occurred when having avoided the tubular blast-furnace tuyere casting of cast copper cavity type blast-furnace tuyere and cast copper, the sand trace, body wall is smooth, the wearing and tearing of decline logistics have been reduced, the abrasion of Coal powder spray, washing away of products of combustion and air-flow, greatly reduce damage intensity, and each parts adopts higher fine copper material (copper content≤99.9% of thermal conductivity, thermal conductivity is 360～390w/mk), the very fast conduction of heat is distributed, improved the work-ing life of blast-furnace tuyere greatly, use through reality, can reach 270～300 days the work-ing life of this blast-furnace tuyere, reduced the replacing and the frequency of maintenance of blast-furnace tuyere, guaranteed the ordinary production of blast furnace, so it has use value and economic worth preferably.

Description of drawings:

Fig. 1: the structural representation of existing cast copper cavity type blast-furnace tuyere

Fig. 2: the structural representation of the tubular blast-furnace tuyere of existing cast copper

Fig. 3: vertical view of the present utility model

Fig. 4: A-A is to sectional view among Fig. 3

Among the figure: 1. termination body; 2. prosopyle; 3. posticum; 4. the wearable hard alloy layer of built-up welding; 5. outer cylinder body; 6. inner barrel; 7. sleeve body; 8. baffle.

Embodiment

The utility model is the lower end of termination body 1 that has the fine copper matter of prosopyle 2 and posticum 3 thereon, be welded to connect the sleeve body 7 that is welded to connect the fine copper plate system that constitutes by endosome tube 6 and outer cylinder body 5 with cooling inner chamber, in the cooling inner chamber of sleeve body 7, be equipped with the baffle 8 of water coolant, on the bottom of sleeve body 7 outer rim and inner barrel 6 internal surfaces, be equipped with the wearable hard alloy layer 4 of built-up welding.

Claims

1. blast-furnace tuyere, it is characterized in that: the lower end of termination body (1) that has the fine copper matter of prosopyle (2) and posticum (3) thereon, be welded to connect the sleeve body (7) that is welded to connect the fine copper plate system with cooling inner chamber of formation by inner barrel (6) and outer cylinder body (5), in the cooling inner chamber of sleeve body (7), be equipped with the baffle (8) of water coolant, on the bottom outer rim of sleeve body (7) and inner barrel (6) internal surface, be equipped with the wearable hard alloy layer (4) of built-up welding.