CN-122028242-A - Sealing device for electrode column of airtight electric furnace

CN122028242ACN 122028242 ACN122028242 ACN 122028242ACN-122028242-A

Abstract

The invention relates to the technical field of electric furnace sealing equipment, and discloses a sealing device for sealing an electric furnace electrode column, which comprises: the nitrogen sealing structure and the flexible sealing structure connected with the nitrogen sealing structure are sequentially sleeved on the electrode column of the sealing electrode. The flexible sealing structure comprises an annular sealing mechanism, a flexible filling layer and a plurality of circumferential compression mechanisms distributed around the sealing mechanism, the sealing mechanism and the outer wall of the electrode column form a sealing cavity, the flexible filling layer is filled in the sealing cavity, the inner wall is attached to the outer wall of the electrode column, and one end of the circumferential compression mechanism penetrates through the sealing mechanism and is in butt joint with the flexible filling layer. According to the scheme, on the premise of not changing the main body structure of the electric furnace, the full-stroke dynamic sealing of the electrode column is realized, the sealing performance of the electric furnace can be remarkably improved, the nitrogen consumption is reduced, the concentration of recovered gas is improved, and the operation safety of the electric furnace is improved.

Inventors

LUO JING
LIU QIAN
Fang Canran
QING HAIQUAN
HE CHAKE
Jiang changling

Assignees

攀钢集团钛业有限责任公司

Dates

Publication Date: 20260512
Application Date: 20260319

Claims (10)

1. A sealing device for a closed electric furnace electrode column, comprising a nitrogen sealing structure and a flexible sealing structure, wherein the flexible sealing structure comprises: The annular sealing mechanism is fixedly connected with the nitrogen sealing structure, sleeved on the outer side of the electrode column and forms a sealing cavity with the outer wall of the electrode column; the flexible filling layer is filled in the sealing cavity, and the inner wall of the flexible filling layer is attached to the outer wall of the electrode column; the plurality of circumferential compression mechanisms are distributed around the sealing mechanism, and one end of each circumferential compression mechanism penetrates through the sealing mechanism and is abutted to the flexible filling layer.
2. The device according to claim 1, wherein the sealing mechanism is formed by sequentially connecting a plurality of sealing parts, and one end of the circumferential pressing mechanism passes through the sealing parts and is abutted against the flexible filling layer.
3. The apparatus of claim 2, wherein the seal comprises a support outer wall and first and second end plates disposed at opposite ends of the support outer wall along an axial direction of the flexible seal structure, the first end plate being fixedly connected to the nitrogen seal structure.
4. A device according to claim 3, wherein the second cover plate comprises an upper cover plate and side plates which are separately arranged at two ends of the upper cover plate, and any two adjacent sealing parts are fixedly connected through the side plates.
5. The device according to claim 2, wherein the sealing part further comprises a guide sleeve, a through hole is formed in the outer supporting wall, a part of the guide sleeve is placed in the through hole and fixedly connected with the outer supporting wall, and one end of the circumferential compression mechanism penetrates through the guide sleeve and is abutted against the flexible filling layer.
6. The device of claim 5, further comprising an inner support ring interposed between the sealing mechanism and the flexible filler layer, an end of the circumferential compression mechanism passing through the guide sleeve and abutting the inner support ring.
7. The device of claim 6, wherein the stroke of the circumferential compression mechanism along the axial direction of the guide sleeve is adjustable, and the stroke adjustment distance is 5 mm-20 mm.
8. The device of claim 7, wherein the circumferential compression mechanism comprises a compression nut and a compression spring, wherein one end of the compression nut, which is close to the outer wall of the support, is provided with a groove, one end of the compression spring is arranged in the groove and is abutted against the inner end surface of the compression nut, the other end of the compression spring passes through the guide sleeve and is abutted against the inner support ring, and the compression nut is connected with the guide sleeve through threads.
9. The device according to claim 1, wherein the flexible filling layer is a slag wool flexible filling layer, the slag wool flexible filling layer is formed by splicing a plurality of fan-shaped slag wool blocks, and the central angle of a single fan-shaped slag wool is 30-60 degrees.
10. The apparatus of claim 1, wherein an annular sealing gasket is disposed between the nitrogen seal and the flexible seal.

Description

Sealing device for electrode column of airtight electric furnace Technical Field The invention relates to the technical field of electric furnace sealing equipment, in particular to a sealing device for sealing an electric furnace electrode column. Background In industries such as titanium slag smelting, a closed electric furnace becomes mainstream equipment, and has the core advantages of recycling coal gas byproducts generated in the production process and realizing the aims of energy conservation, emission reduction and double carbon. At present, the electrode column of the closed electric furnace is sealed by a combined mode of copper bush guiding and nitrogen gas sealing, but the mode has the obvious defects that the electrode column needs to move up and down along the axial direction in the smelting process, so that a dynamic gap exists between the electrode column and a sealing structure, when the negative pressure in the furnace is large, external air is easy to mix into the furnace through the gap, and the external air and carbon monoxide in coal gas are subjected to combustion reaction, so that explosion is easy to occur, safety risk is caused, the coal gas recovery concentration and efficiency are reduced, the nitrogen gas consumption is increased, and the production cost is increased. Disclosure of Invention In view of the above, the invention provides a sealing device for a sealed electric furnace electrode column, which solves the technical problems of air mixing, high nitrogen consumption and poor safety in the smelting process caused by sealing failure due to dynamic clearance in the existing copper bush guiding and nitrogen sealing mode. On one hand, the embodiment of the invention provides a sealing device for a sealed electric furnace electrode column, which comprises a nitrogen sealing structure and a flexible sealing structure, wherein the flexible sealing structure comprises an annular sealing mechanism fixedly connected with the nitrogen sealing structure and sleeved on the outer side of the electrode column to form a sealing cavity with the outer wall of the electrode column, a flexible filling layer filled in the sealing cavity, the inner wall of the flexible filling layer is attached to the outer wall of the electrode column, and a plurality of circumferential pressing mechanisms distributed around the sealing mechanism, and one end of each circumferential pressing mechanism penetrates through the sealing mechanism and is in butt joint with the flexible filling layer. In some embodiments, the sealing mechanism is formed by sequentially connecting a plurality of sealing parts, and one end of the circumferential compression mechanism passes through the sealing parts and is abutted with the flexible filling layer. In some embodiments, the sealing part comprises a support outer wall, and a first end plate and a second end plate which are respectively arranged at two ends of the support outer wall along the axial direction of the flexible sealing structure, wherein the first end plate is fixedly connected with the nitrogen sealing structure. In some embodiments, the second cover plate includes an upper cover plate and side plates separately arranged at two ends of the upper cover plate, and any two adjacent sealing parts are fixedly connected through the side plates. In some embodiments, the sealing part further comprises a guide sleeve, a through hole is formed in the outer supporting wall, a part of the guide sleeve is arranged in the through hole and fixedly connected with the outer supporting wall, and one end of the circumferential compression mechanism penetrates through the guide sleeve and is in butt joint with the flexible filling layer. In some embodiments, the sealing device for sealing the electrode column of the electric furnace further comprises an inner support ring arranged between the sealing mechanism and the flexible filling layer, and one end of the circumferential compression mechanism passes through the guide sleeve and is abutted against the inner support ring. In some embodiments, the stroke of the circumferential compression mechanism along the axial direction of the guide sleeve is adjustable, and the stroke adjustment distance is 5 mm-20 mm. In some embodiments, the circumferential compression mechanism comprises a compression nut and a compression spring, wherein one end of the compression nut, which is close to the outer wall of the support, is provided with a groove, one end of the compression spring is arranged in the groove and is in butt joint with the inner end surface of the compression nut, the other end of the compression spring passes through the guide sleeve and is in butt joint with the inner support ring, and the compression nut is in threaded connection with the guide sleeve. In some embodiments, the flexible filling layer is a slag cotton flexible filling layer, the slag cotton flexible filling layer is formed by splicing a plurality of fan-sha