CN201746574U

CN201746574U - Shielded small furnace cover of VD furnace

Info

Publication number: CN201746574U
Application number: CN2010202090809U
Authority: CN
Inventors: 孙永喜; 秦东; 李法兴; 王保峰; 贾俊文; 马传庆; 王超; 慕长征; 张君平; 毛建强
Original assignee: Laiwu Iron and Steel Group Co Ltd
Current assignee: Laiwu Iron and Steel Group Co Ltd
Priority date: 2010-05-31
Filing date: 2010-05-31
Publication date: 2011-02-16
Anticipated expiration: 2020-05-31

Abstract

The utility model relates to a shielded small furnace cover of a VD (vacuum degassing) furnace, comprising a shell (1) and a warmth-keeping layer (2). The shielded small furnace cover is characterized in that a heat-insulating layer (3) is arranged between the shell (1) and the warmth-keeping layer (2); the internal surface of the shell (1) is provided with fixed reinforcements (4) with unequal lengths; the fixed reinforcements (4) penetrates into the heat-insulating layer (3) and the warmth-keeping layer (2) so that the shell (1), the heat-insulating layer (3) and the warmth-keeping layer (2) can be contacted with one another compactly and reinforced; the external surface of the shell (1) is provided with a stiffener (5); and the heat-insulating layer (3) is made of fireproof fibers with small heat-conduction coefficient and the thickness of 10 to 30mm. Compared with the prior art, the insulating layer and fixed reinforcements are additionally arranged between the shell and the internal warmth-keeping layer, the temperature of the external steel shell is effectively reduced during the vacuum degassing process of the VD furnace, and the problem of material falling due to early deformation of the shell is avoided, therefore, the service life of the VD furnace is prolonged.

Description

The VD stove shields little bell

Technical field

The utility model belongs to technical field of ferrous metallurgy, relates to a kind of VD vacuum degassing furnace with shielding little bell.

Background technology

VD vacuum degassing furnace cover generally is made up of big bell of sealing and center shielding port lid; the main effect that the center shields little bell is the hyperthermia radiation of shielding Vacuum Degassing Process molten steel and prevents that slag from directly spilling; protect big bell; alleviate the damage of high temperature, guarantee to demonstrate,prove the direct motion of vacuum deaeration refining process big bell and configuration device thereof.Simultaneously, the heat in the shielding stove reduces heat and scatters and disappears, and plays insulation and avoid causing the excessive effect of molten steel temperature drop in VD stove Vacuum Degassing Process.The VD stove shields little bell and mainly contains two kinds of anti-material and water-cooleds.It is to be made of bell shell and the inner thermal insulation layer liner of anti-material two portions of tiing a knot or pouring into a mould that anti-material shields little bell, and heat insulation effect is better than the little bell of water-cooled.In Vacuum Degassing Process, the center shields high temperature furnace slag and the chemical erosion of gas and the mechanical vibration effect that stirring causes that little bell is subjected to the washing away of high temperature gas flow, splash, outside box hat is at high temperature yielding, causes inner anti-material to come off, and it is low to reduce its work-ing life greatly.And more switching center9 to shield the difficulty of little bell big, the time is long, makes the VD stove long stoppage time, reduces its utilization ratio.

Summary of the invention

The purpose of this utility model is at the VD of anti-material stove shielding port lid the deficiencies in the prior art, provides a kind of VD of anti-material stove of long service life to shield little bell.Realize that the technical scheme that the purpose of this utility model is taked is: this VD stove shields little bell and includes shell and thermal insulation layer, between shell and thermal insulation layer, thermal insulation layer is set, inner surface of outer cover is provided with the fixedly reinforcing bar that is uneven in length, fixedly reinforcing bar is deep into thermal insulation layer and thermal insulation layer, and shell, thermal insulation layer, thermal insulation layer contact are closely also reinforced.In order to increase the stability of shell, be provided with stiffening web at the outside surface of shell.

The utility model compared with the prior art, by between shell and base insulating layer, adding thermal insulation layer and fixing reinforcing bar, effectively reduce temperature, avoided the shell premature deformations to cause the problem that comes off of anti-material, thereby improved its work-ing life at the outside box hat of VD stove Vacuum Degassing Process.

Description of drawings

Fig. 1 is a front view of the present utility model;

Fig. 2 is a vertical view of the present utility model;

Fig. 3 is a sectional view of the present utility model.

Among the figure, 1, shell, 2, thermal insulation layer, 3, thermal insulation layer, 4, fixing reinforcing bar, 5, stiffening web.

Embodiment

Referring to accompanying drawing, this VD stove shields little bell and includes shell 1 and thermal insulation layer 2, between shell 1 and thermal insulation layer 2, thermal insulation layer 3 is set, shell 1 internal surface is provided with the fixedly reinforcing bar 4 that is uneven in length, fixedly reinforcing bar 4 is deep into thermal insulation layer 3 and thermal insulation layer 2, and shell 1, thermal insulation layer 3, thermal insulation layer 2 contacts are closely also reinforced.In order to increase the stability of shell 1, be provided with stiffening web 5 at the outside surface of shell 1.Shell 1 is a steel material, and thermal insulation layer 2 adopts refractory material casting or knotting to make, and thermal insulation layer 3 materials are the little refractory fibre of thermal conductivity, and thickness is 10～30mm.

Claims

1. a VD stove shields little bell, include shell (1) and thermal insulation layer (2), it is characterized in that between shell (1) and thermal insulation layer (2), thermal insulation layer (3) being set, shell (1) internal surface is provided with the fixedly reinforcing bar (4) that is uneven in length, fixedly reinforcing bar (4) is deep into thermal insulation layer (3) and thermal insulation layer (2), and shell (1), thermal insulation layer (3), thermal insulation layer (2) contact are closely also reinforced.

2. shield little bell according to the said VD stove of claim 1, it is characterized in that the outside surface of shell (1) is provided with stiffening web (5).

3. shield little bell according to the said VD stove of claim 1, it is characterized in that described thermal insulation layer (3) material is the little refractory fibre of thermal conductivity, thickness is 10～30mm.