CN213266566U

CN213266566U - Taphole brick for blast furnace

Info

Publication number: CN213266566U
Application number: CN202022328269.6U
Authority: CN
Inventors: 郭晓伟; 辛桂艳; 雷其针; 冯金钢; 张纪东; 孙高扬; 周战飞; 樊朝辉; 孙锋
Original assignee: Sinosteel Luonai Technology Co Ltd
Current assignee: Sinosteel Luonai Technology Co Ltd
Priority date: 2020-10-19
Filing date: 2020-10-19
Publication date: 2021-05-25
Anticipated expiration: 2030-10-19

Abstract

A taphole brick for a blast furnace is characterized in that a taphole is arranged on a brick body, a guide ring extends along the axis of the taphole at the outflow end of the taphole, a counter bore is sunken along the axis of the taphole at the inflow end of the taphole, and the counter bore is used for inserting the guide ring of another taphole brick; a plurality of taphole bricks are inserted in sequence to form a complete tapping channel. The utility model discloses a mode of pegging graft around polylith iron notch brick has realized the low-cost manufacturing of big iron notch degree of depth iron notch brick. The utility model discloses a water conservancy diversion ring can prevent that the iron melt from to the impact of iron mouthful brick outer oral area, has prolonged the life of iron mouthful brick. The utility model discloses it is convenient to change, compares whole iron mouthful brick or many bricks combination iron mouthful brick, and its change engineering volume, maintenance cost all reduce by a wide margin.

Description

Taphole brick for blast furnace

Technical Field

The utility model belongs to the technical field of refractory material technique and specifically relates to an iron notch brick for blast furnace is related to.

Background

In order to save energy and improve efficiency, the existing blast furnace is developed to be large-scale, and an iron notch is the weakest link in a hearth. The depth of the iron notch of a large-scale blast furnace is more than 1.5 meters, and the iron notch is built by dozens or even hundreds of iron notch bricks. The patent with application number 201220436008.9 discloses a combined iron notch brick, which is formed by an upper brick and a lower brick to form an iron hole. The patent application No. 200920277245.3 discloses a combined taphole brick for a blast furnace, wherein an iron outlet hole is formed by surrounding a plurality of taphole bricks. In order to ensure that molten iron does not permeate into brick gaps, the splicing gaps of the bricks in the above patent are required to be ensured to be less than 1mm, so that the contact surfaces of the bricks are required to be ground, and the ground contact surfaces destroy glaze layers on the surfaces of the bricks, thereby influencing the molten iron corrosion resistance of the bricks.

In the prior art, the whole taphole brick is provided with the taphole on the brick body, so that the problem of molten iron seeping at the brick joint does not exist, but the depth of the whole taphole brick is larger because the taphole is larger. One factor which has a great influence on the service life of the taphole brick is the impact of molten iron on the outer opening part of the taphole, which causes the brick body at the outer opening part to crack and peel off.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the background art, the utility model discloses an iron notch brick for blast furnace, which adopts the following technical scheme:

a taphole brick for a blast furnace is characterized in that a taphole is arranged on a brick body, a guide ring extends along the axis of the taphole at the outflow end of the taphole, a counter bore is sunken along the axis of the taphole at the inflow end of the taphole, and the counter bore is used for inserting the guide ring of another taphole brick; a plurality of taphole bricks are inserted in sequence to form a complete tapping channel.

According to the technical scheme, the guide ring is provided with an outer conical surface, and the counter bore is provided with an inner conical surface corresponding to the outer conical surface of the guide ring.

According to the technical scheme, the taper angle of the outer conical surface of the deflector ring is larger than 30 degrees.

Further improving the technical scheme that the inclination angle of the iron outlet hole is 6-15 degrees.

The technical scheme is further improved, after the guide ring is inserted into the counter bore, the distance from the end face of the guide ring to the bottom of the counter bore is 1-3 mm.

The technical scheme is further improved, the brick body is made of corundum silicon carbide, and a glaze layer is sintered on the surface of the brick body.

Owing to adopt above-mentioned technical scheme, compare the background art, the utility model discloses following beneficial effect has:

the utility model discloses a mode of pegging graft around polylith iron notch brick has realized the low-cost manufacturing of big iron notch degree of depth iron notch brick.

The utility model discloses a water conservancy diversion ring can prevent that the iron melt from to the impact of iron mouthful brick outer oral area, has prolonged the life of iron mouthful brick.

The utility model discloses it is convenient to change, compares whole iron mouthful brick or many bricks combination iron mouthful brick, and its change engineering volume, maintenance cost all reduce by a wide margin.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic cross-sectional view of fig. 1.

Fig. 3 is a schematic structural diagram of three taphole bricks which are sequentially inserted.

In the figure: 1. tapping holes; 2. a flow guide ring; 3. a counterbore.

Detailed Description

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.

A taphole brick for a blast furnace is characterized in that a brick body is made of corundum silicon carbide, and a glaze layer is sintered on the surface of the brick body. As shown in fig. 1-2, the brick body is provided with a tapping hole 1, and the angle of inclination of the tapping hole 1 is 8 °. At the outflow end of the tapping hole 1, a guide ring 2 extends along the axis of the tapping hole 1, a counter bore 3 is sunken at the inflow end of the tapping hole 1 along the axis of the tapping hole 1, and the counter bore 3 is used for inserting the guide ring 2 of another taphole brick. The depth of each taphole brick is 600mm, three taphole bricks are sequentially spliced, as shown in figure 3, a tapping channel with the taphole depth of about 1.8 m is formed, and thus the low-cost manufacture of the taphole brick with large taphole depth can be realized.

Because the iron outlet hole 1 has an inclined angle, when the guide ring 2 is inserted into the counter bore 3, one of the iron notch bricks needs to be lifted to align the insertion angle, which causes difficulty in installation. Therefore, the technical scheme is further improved, an outer conical surface is arranged on the guide ring 2, and an inner conical surface corresponding to the outer conical surface of the guide ring 2 is arranged in the counter bore 3. Because the inclination angle of the iron outlet hole 1 is 8 degrees, the taper angle of the outer conical surface is larger than 16 degrees in principle, and the problem of mutual insertion does not exist. In this embodiment, the taper angle of the outer conical surface of the guide ring 2 is 30 °, the distance from the end surface of the guide ring 2 to the bottom of the counterbore 3 is controlled to be 2mm, and the gap between the two bricks is also controlled to be about 2mm, so that the outer conical surface of the guide ring 2 is completely attached to the inner conical surface of the counterbore 3, and molten iron is prevented from leaking. The gap between the end face of the guide ring 2 and the bottom of the counter bore 3 can be filled with stemming, and the gap between the two bricks is filled with refractory slurry and bonded.

The iron notch brick is positioned at the outermost end of the tapping channel, the guide ring 2 on the iron notch brick forms a molten iron nozzle, the molten iron nozzle prevents molten iron from impacting the outer opening part of the original iron notch brick, and the service life of the iron notch brick is prolonged. When the taphole brick that is located tapping passageway outermost end needs to be changed, only need to cut into pieces with its chisel and take out and change new taphole brick and can accomplish the change, compare whole taphole brick or many bricks combination taphole brick, its change engineering volume, maintenance cost all reduce by a wide margin.

The part of the utility model not detailed is prior art. Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An iron notch brick for a blast furnace is characterized in that: an iron hole is arranged on the brick body, a guide ring extends along the axis of the iron hole at the outflow end of the iron hole, a counter bore is sunken at the inflow end of the iron hole along the axis of the iron hole, and the counter bore is used for inserting the guide ring of another iron-notch brick; a plurality of taphole bricks are inserted in sequence to form a complete tapping channel.

2. The taphole brick for the blast furnace according to claim 1, wherein: the guide ring is provided with an outer conical surface, and the counter bore is provided with an inner conical surface corresponding to the outer conical surface of the guide ring.

3. The taphole brick for the blast furnace according to claim 2, wherein: the cone angle of the outer conical surface of the deflector ring is more than 30 degrees.

4. The taphole brick for the blast furnace according to claim 1, wherein: the inclination angle of the iron outlet hole is between 6 and 15 degrees.

5. The taphole brick for the blast furnace according to claim 1, wherein: after the guide ring is inserted into the counter bore, the distance from the end face of the guide ring to the bottom of the counter bore is 1-3 mm.

6. The taphole brick for the blast furnace according to claim 1, wherein: the brick body is made of corundum silicon carbide, and a glaze layer is sintered on the surface of the brick body.