CN205437123U

CN205437123U - Modular annular slit air brick

Info

Publication number: CN205437123U
Application number: CN201521088692.6U
Authority: CN
Inventors: 余同暑; 陈卢; 尹洪丽; 刘红康; 张晖; 禄向阳; 刘志宏
Original assignee: Sinosteel Luoyang Institute of Refractories Research Co Ltd
Current assignee: Sinosteel Luoyang Institute of Refractories Research Co Ltd
Priority date: 2015-12-24
Filing date: 2015-12-24
Publication date: 2016-08-10
Anticipated expiration: 2025-12-24

Abstract

The utility model belongs to the technical field of ladle bottom blowing argon air brick, concretely relates to modular annular slit air brick. An inside body (1) and outside body (2) that's a modular annular slit air brick puts the setting including the cover is proposed, the thermal expansion coefficient of inside body (1) is greater than (2) thermal expansion coefficient of outside body, outside body (2) the cover put the outside of inside body (1), and the clearance has between the two, clearance between outside body, the inside body is annular gap, just annular gap as modular annular slit air brick's annular slit (3). The utility model discloses can effectively prevent molten steel infiltration and reduce the whole thermal stress of air brick in to the slit to reduce jam of air brick slit and the horizontal brick risk of breaking, improved air brick blowing through rate and life.

Description

A kind of Combined annular slit air brick

Technical field

This utility model belongs to steel ladle bottom argon blowing air brick technical field, is specifically related to a kind of Combined annular slit air brick.

Background technology

In modern metallurgical production process, ladle argon-blown refine is topmost refined form in liquid steel refining, is blown into high-purity argon gas by air brick and reaches uniform molten steel composition and temperature, promotion inclusion floating and desulfurization, the refine purpose of degassing in molten steel；Therefore, air brick is the function element of most critical in ladle argon-blown refine, and Argon success or failure are directly connected to whether liquid steel refining is smoothed out.

At present, as it is shown in figure 1, the air brick that ladle argon-blown refine is commonly used is slit-type overall structure, its version is rectangular slits the most radial distribution with air brick center for the center of circle, has monocycle or dicyclo distribution, in the majority with dicyclo distribution；But, this monoblock type narrow slit structure in use slit easily oozes steel and blocks, and affects Gas Stirring effect；It addition, air brick Axial Thermal stress gradient is relatively big during Shi Yonging, often there is the brick that laterally breaks in work surface bottom 20～50mm, and causes Argon inefficacy, refine unsuccessfully to cause molten steel to melt down or ladle-to-ladle.

Utility model content

The purpose of this utility model is to propose a kind of Combined annular slit air brick, can effectively stop molten steel to permeate in slit and reduce air brick overall thermal stress, thus reduce the blocking of air brick slit and the most disconnected brick risk, improve air brick through-blowing rate and service life.

For solving above-mentioned technical problem, this utility model adopts the following technical scheme that

A kind of Combined annular slit air brick, described Combined annular slit air brick includes inside body and the outer body being nested with setting；The thermal coefficient of expansion of described inside body is more than the thermal coefficient of expansion of outer body；Described outer body is nested with the outside in described inside body, and has gap between the two；Gap between described outer body, inside body is annular gap, and described annular gap is as the narrow annular channel of Combined annular slit air brick.

In described inside body, being respectively arranged with gas-permeable channels in outer body, described gas-permeable channels is disperse formula gas-permeable channels or through type gas-permeable channels or labyrinth type gas-permeable channels or slit gas-permeable channels.

Described inside body, outer body are the most pourable, machine is pressed or isostatic pressing.

A kind of Combined annular slit air brick that the utility model proposes, use technique scheme, have the advantages that and can effectively stop molten steel to permeate in slit and reduce air brick overall thermal stress, thus reduce the blocking of air brick slit and the most disconnected brick risk, improve air brick through-blowing rate and service life.

Above-mentioned technology relatively prior art of the present utility model has the advantage that

1, the narrow annular channel in this utility model has been effectively isolated inside body and outer body, greatly reduce air brick overall thermal stress, it is to avoid the risk of air brick entirety fracture, moreover it is possible to be effectively increased ventilative flow.

2, the thermal coefficient of expansion due to inside body is more than the thermal coefficient of expansion of outer body, in air blowing process, shrink more than outer body owing to the cooling effect of gas makes inside body produce, cause narrow annular channel to broaden, gas flow increases, and Gas Stirring effect is obviously enhanced；After air blowing terminates, owing to gas cooling effect terminates, inside body, outer body be expanded by heating by the action of soaking of high-temperature molten steel, and inside body expansion makes narrow annular channel narrow more than outer body, effectively prevent molten steel to permeate in narrow annular channel, improve air brick through-blowing rate.

Accompanying drawing explanation

Fig. 1 is the top view of the most general slit air brick.

Fig. 2 is structural representation of the present utility model.

In figure: 1, inside body, 2, outer body, 3, narrow annular channel, 4, gas-permeable channels.

Detailed description of the invention

In conjunction with the drawings and specific embodiments, this utility model is illustrated, but is not intended that restriction of the present utility model；

As in figure 2 it is shown, a kind of Combined annular slit air brick, described Combined annular slit air brick includes inside body 1 and the outer body 2 being nested with setting；The thermal coefficient of expansion of described inside body 1 is more than the thermal coefficient of expansion of outer body 2；Described outer body 2 is nested with the outside in described inside body 1, and has gap between the two；Gap between described outer body, inside body is annular gap, and described annular gap is as the narrow annular channel 3 of Combined annular slit air brick；In this embodiment, combining in the outer body 2 of high temperature sintering through the inside body 1 of high temperature sintering, between the two, combination forms narrow annular channel 3；Inside body 1 is the ventilative body of moulding by casting, and material is corundum-spinel, arranges 12 ventilative slits 4 if internal；This examples portion body 2 is the ventilative body of mechanical pressing, and inside arranges disperse formula gas-permeable channels, and material is pink fused alumina-spinel.

This utility model, in air blowing process, shrinks more than outer body 2 owing to the cooling effect of gas makes inside body 1 produce, causes narrow annular channel 3 to broaden, and gas flow increases, and Gas Stirring effect is obviously enhanced；After air blowing terminates, owing to gas cooling effect terminates, inside body 1, outer body 2 are by the action of soaking of high-temperature molten steel and expanded by heating, inside body 1) expansion makes narrow annular channel 3 narrow more than outer body 2, effectively prevent molten steel to permeate in narrow annular channel 3, improve air brick through-blowing rate.

Claims

1. a Combined annular slit air brick, it is characterised in that: described Combined annular slit air brick includes inside body (1) and the outer body (2) being nested with setting；The thermal coefficient of expansion of described inside body (1) is more than the thermal coefficient of expansion of outer body (2)；Described outer body (2) is nested with in the outside of described inside body (1), and has gap between the two；Gap between described outer body, inside body is annular gap, and described annular gap is as the narrow annular channel (3) of Combined annular slit air brick.

2. a kind of Combined annular slit air brick as claimed in claim 1, it is characterized in that: described inside body (1) is upper, be respectively arranged with gas-permeable channels (4) in outer body (2), described gas-permeable channels is disperse formula gas-permeable channels or through type gas-permeable channels or labyrinth type gas-permeable channels or slit gas-permeable channels.