CN205077079U - Cooling wall for "bosh of blast furnace - Google Patents

Abstract

The utility model discloses a cooling wall for a blast furnace bosh, which solves the problem that the bottom of the hot surface of the cooling wall is easily burned by the gas flow at present. It is mainly composed of the stave body with cooling water pipes buried inside and the inlaid bricks inlaid on the hot surface of the stave body. There is a boss at the bottom of the hot surface of the stave body, and the bottom surface of the inlaid brick is supported on the boss. For the cooling water pipe, the outer surface of the boss is flush with the outer surface of the brick. The bosses added at the bottom of the utility model can provide support for the upper inlaid bricks, prevent the inlaid bricks from falling off after being broken by thermal stress, and effectively prolong the protection period of the inlaid bricks on the cooling wall; when the inlaid bricks in the cooling wall are completely eroded, the bosses can Provide support to the condensed slag skin on the hot surface of the stave, effectively prevent the slag skin from falling off, thereby enhancing the protection of the stave body; at the same time, the boss with the cooling water pipe buried inside can strengthen the air outlet on the hot surface of the cast iron stave at the lower air outlet section Combined brick cooling prolongs the life of the cast iron stave in the tuyere section.

Description

Cooling wall for blast furnace bosh

technical field

The utility model relates to a cooling wall for a blast furnace bosh.

Background technique

The stave is one of the main equipment on the ironmaking blast furnace. According to different parts of the blast furnace, staves have different materials and structures. Among them, brick-inlaid copper staves are mostly used in the blast furnace bosh, furnace waist and lower part of the furnace shaft due to the high heat flow intensity. Two to three years after the blast furnace was opened, the inlaid bricks were completely eroded. During the subsequent service process, the cooling wall mainly relied on the slag skin covering the surface for self-protection. Or other uncontrollable factors will cause the slag skin to fall off, causing the surface of the stave to be directly exposed to the high-temperature gas flow, slag-iron flow or high-temperature molten material, resulting in a sharp rise in the temperature of the stave surface and accelerating its erosion and damage process. Especially for the copper stave at the junction of the lower part of the bosh and the furnace hearth, the bottom of the hot surface of the copper stave is often burned by the gas flow. The above phenomenon shows that there are deficiencies in the existing copper stave structure design in the bosh section, and it needs to be improved and optimized to prolong the service life of the stave.

Contents of the invention

The purpose of the utility model is to overcome the defects of the prior art, provide a bosh stave with reasonable structure, effectively avoid erosion and damage of the bosh stave, and prolong the service life of the stave.

The technical scheme of the utility model is realized in the following way: a cooling stave for a blast furnace bosh is mainly composed of a cooling stave body with cooling water pipes buried inside and inlaid bricks inlaid on the hot surface of the stave body. Bosses are provided at the bottom of the hot surface, and the bottom surface of the inlaid bricks is supported on the bosses.

Preferably, cooling water pipes are buried inside the boss.

Preferably, the outer facade of the boss is flush with the outer facade of the bricks.

The bosses added at the bottom of the utility model can provide support for the upper inlaid bricks, prevent the inlaid bricks from falling off after being broken by thermal stress, and effectively prolong the protection period of the inlaid bricks on the cooling wall; when the inlaid bricks in the cooling wall are completely eroded, the bosses can Provide support for the condensed slag skin on the hot surface of the stave, effectively prevent the slag skin from falling off, thereby enhancing the protection of the stave body; at the same time, the boss with the cooling water pipe buried inside can strengthen the air outlet on the hot surface of the cast iron stave at the lower air outlet section Combined brick cooling prolongs the life of the cast iron stave in the tuyere section.

Description of drawings

Fig. 1 is a front view of the structure of the utility model.

Fig. 2 is a side view of the structure of the utility model.

In the figure, 1-stave body; 2-cooling water pipe; 3-boss; 4-inlaid bricks.

detailed description

Further describe below in conjunction with accompanying drawing:

As shown in Figure 1 and Figure 2, a stave for a blast furnace bosh is mainly composed of a stave body 1 with a cooling water pipe 2 buried inside and a brick inlaid 4 inlaid on the hot surface of the stave body, and the SiC inlaid brick with high thermal conductivity 4 is inlaid on the hot surface of the stave body 1 through the dovetail groove, the bottom of the hot surface of the stave body 1 is provided with a boss, the bottom surface of the inlaid brick 4 is supported on the boss 3, and the cooling water pipe 2 arranged horizontally is embedded in the boss, and the convex The platform 3 is cooled, and the outer facade of the boss 3 is flush with the outer facade of the inlaid brick 4, which can effectively support the inlaid brick 4, and avoid excessive protrusion and excessive burning.

The height, thickness, dovetail groove and other dimensions of stave body can be flexibly designed according to the requirements of different blast furnace types. The above-mentioned new copper stave with boss structure can provide support for the inlaid bricks and slag skin, and delay the shedding of the inlaid bricks and slag skin of the stave; in addition, it can also cool and protect the combined bricks of the tuyere section, effectively Delay the breakage of the cast iron stave in the tuyere section, thereby reducing the maintenance cost of the blast furnace stave and ensuring the smooth running of the blast furnace.

Claims (3)

1. a blast-furnace bosh cooling stave, be embedded with the cooling stave body of water-cooled tube primarily of inside and be embedded in the edge brick composition of cooling stave body hot side, it is characterized in that: be provided with boss bottom cooling stave body hot side, edge brick bottom supporting is on boss.

2. a kind of blast-furnace bosh cooling stave according to claim 1, is characterized in that: boss inside is embedded with water-cooled tube.

3. a kind of blast-furnace bosh cooling stave according to claim 2, is characterized in that: boss alien invasion is concordant with edge brick alien invasion.