An electric furnace electrode flue gas sealing device
By setting a high-temperature flexible composite cloth sealing plate and support structure at the electrode hole, the problems of energy waste and environmental pollution under the traditional sealing method are solved, and effective flue gas blocking and electrode protection are achieved, reducing energy consumption and acid production costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JINCHUAN GROUP NICKEL COBALT CO LTD
- Filing Date
- 2025-05-27
- Publication Date
- 2026-05-26
AI Technical Summary
Traditional electrode hole sealing methods are ineffective under high-temperature flue gas erosion and frequent electrode raising and lowering, resulting in wasted energy, increased acid production costs due to cold air intake, and SO2 flue gas overflow, polluting the environment.
The sealing plate, made of high-temperature flexible composite fabric, is fixed by screws together with the support plate and the fixing plate to form a multi-layer sealing structure. This seals the gap between the electrode rod and the electrode hole, and the support rod prevents the sealing plate from falling, thus protecting the electrode when it moves.
It effectively prevents flue gas leakage, protects electrode rods, reduces power consumption and acid production costs, improves the working environment, and has a simple structure and low cost.
Smart Images
Figure CN224285457U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of electric furnace equipment and relates to an electric furnace electrode flue gas sealing device. Background Technology
[0002] In pyrometallurgical production, the heat source for materials in electric furnaces, besides the sensible heat of the materials and the exothermic reaction, mainly relies on electrical energy. Electrical energy is converted into thermal energy within the slag layer, thus providing the primary energy source for the production process. The electrical energy utilization rate of the electrode inserted into the slag at the transition contact point near the molten slag is 40%–80%. Localized, dispersed micro-arc discharges occur here. When the electrode is not deeply inserted, the electrical energy utilization rate in this form can reach 80%. On-site observation shows the electrode forming a bright arc on the slag surface, but most of the heat is carried away by the furnace gas. There is a gap of approximately 100mm between the electrode at the furnace top and the electrode hole. An excessively large gap has several drawbacks: firstly, it results in a higher air leakage rate in the furnace, leading to increased electrical energy consumption by the electrode; secondly, the intake of cold air increases the cost of acid production; and thirdly, fluctuations in negative pressure in the electrode hole area cause a large amount of SO2 flue gas to overflow, severely polluting the on-site working environment.
[0003] Traditional electrode hole sealing methods involve refractory material masonry or simple plugging with materials such as asbestos cloth and slag wool. Due to the erosion of high-temperature flue gas and the frequent raising and lowering of the electrode, the sealing effect is poor. Utility Model Content
[0004] The purpose of this invention is to provide an electric furnace electrode flue gas sealing device to address the problems existing in the prior art.
[0005] Therefore, the present invention adopts the following technical solution:
[0006] An electric furnace electrode flue gas sealing device includes a furnace body, an electrode hole at the top of the furnace body, an electrode rod inside the electrode hole, a sealing plate at the top of the electrode hole, a through hole in the middle of the sealing plate, and the electrode rod passing through the through hole, the diameter of the through hole being the same as the diameter of the electrode rod.
[0007] Furthermore, the sealing plate is a multi-layer flexible composite fabric.
[0008] Furthermore, the top of the electrode hole is provided with a circular support plate, the middle of the support plate is provided with a first through hole, the upper side of the support plate is provided with a fixing plate, the fixing plate is provided with a first through hole, the electrode rod passes through the first through hole and the first through hole, the sealing plate is located between the support plate and the fixing plate, the upper side of the support plate is fixed with a plurality of screws along the circumference of the support plate, the sealing plate is provided with a plurality of mounting holes corresponding to the screws along the circumference of the sealing plate, the fixing plate is provided with a plurality of locking holes corresponding to the screws along the circumference of the fixing plate, the screws pass through the mounting holes and locking holes, and the screws are provided with nuts.
[0009] Furthermore, a plurality of horizontally arranged support rods are provided at the first through hole along the circumference of the first through hole, and the support rods are arranged radially along the first through hole.
[0010] Furthermore, the support plate is horizontally positioned.
[0011] Furthermore, the first through hole is coaxial with the electrode hole and the diameter of the through hole is the same as that of the electrode hole.
[0012] The beneficial effects of this utility model are as follows: a sealing plate made of high-temperature flexible composite cloth is set in the electrode hole at the top of the furnace body, which can effectively seal the gap between the electrode rod and the electrode, effectively preventing flue gas from flowing out of the gap and polluting the surrounding environment; when the electrode rod moves up and down, it can effectively prevent scratching and damage to the electrode rod; the structure is simple, the cost is low, and the performance is good. Attached Figure Description
[0013] Figure 1 This is a schematic front view of the structure of this utility model;
[0014] Figure 2 This is a top view illustrating the structure of this utility model;
[0015] Figure 3 for Figure 1 Enlarged view of part A in the middle;
[0016] In the figure, 1-furnace body, 2-electrode hole, 3-electrode rod, 4-sealing plate, 5-through hole, 6-support plate, 7-first through hole, 8-fixing plate, 9-second through hole, 10-screw, 11-mounting hole, 12-locking hole, 13-nut, 14-support rod, 15-gap. Detailed Implementation
[0017] The present invention will now be described in detail with reference to the accompanying drawings:
[0018] like Figure 1 and 2As shown, an electric furnace electrode flue gas sealing device includes a furnace body 1. An electrode hole 2 is provided at the top of the furnace body 1, and an electrode rod 3 is provided inside the electrode hole 2. A gap 15 is formed between the electrode rod 3 and the inner wall of the electrode hole 2. A sealing plate 4 made of high-temperature flexible composite cloth is provided at the top of the electrode hole 2. The sealing plate 4 is circular and horizontally arranged. Existing conventional high-temperature cloth can be used for the high-temperature flexible composite cloth. The sealing plate 4 is used to seal the gap 15, preventing flue gas from flowing out of the gap. A through hole 5 is provided in the middle of the sealing plate 4, through which the electrode rod 3 passes. The diameter of the through hole 5 is the same as the diameter of the electrode rod 3. The use of flexible high-temperature cloth effectively prevents the electrode rod 3 from moving up and down, preventing damage to the electrode rod 3 when it collides or scrapes against the edge of the through hole 5 of the sealing plate 4. Specifically, a circular support plate 6 is provided at the top of the electrode hole 2 and is horizontally arranged. The support plate 6 has a first through hole 7 in the middle, which is coaxial with the electrode hole 2 and has the same diameter as the electrode hole 2. The support plate 6 has a fixing plate 8 on its upper side, and the fixing plate 8 has a second through hole 9. The electrode rod 3 passes through the first through hole 7 and the second through hole 9. The sealing plate 4 is located between the support plate 6 and the fixing plate 8. The sealing plate 4 can be held and fixed by the support plate 6 and the fixing plate 8. A number of vertically arranged screws 10 are fixed on the upper side of the support plate 6 along the circumference of the support plate 6. The sealing plate 5 has a number of mounting holes 11 that correspond one-to-one with the screws 10 along the circumference of the sealing plate 4. The fixing plate 8 has a number of locking holes 12 that correspond one-to-one with the screws 10 along the circumference of the fixing plate 8. The screws 10 pass through the mounting holes 11 and the locking holes 12. The screws 10 are also provided with nuts 13. The support plate 6 and the fixing plate 8 can clamp the sealing plate 4 by the screws 10 and the nuts 13.
[0019] The sealing plate 4 is secured by the support plate 6 and the fixing plate 8, which makes it easy to replace the sealing plate 4 after a period of use.
[0020] To prevent the sealing plate 4 from sagging under gravity near the through hole 5 after a period of use, thus creating a gap between the electrode rod 3 and the through hole 5, a plurality of horizontally arranged support rods 14 are provided around the first through hole 7. In this embodiment, four support rods 14 are provided. The support rods 14 are arranged radially along the first through hole 7, and the length of the support rod 14 is half the width of the gap 15. The support rods 14 can support the sealing plate 4 near the through hole 5.
[0021] The method of using this utility model is as follows:
[0022] When flue gas is generated inside the furnace body 1 during use, the flue gas flows upward and enters the gap 15 between the electrode rod 3 and the electrode hole 2. At this time, due to the sealing plate 4, the flue gas can be effectively prevented from flowing out of the gap 15 and polluting the surrounding environment. In addition, when the electrode rod 3 moves up and down, the electrode rod 3 scrapes against the edge of the through hole 5 of the sealing plate 4, which can effectively prevent damage to the electrode rod 3.
Claims
1. An electric furnace electrode flue gas sealing device, comprising a furnace body (1), wherein an electrode hole (2) is provided at the top of the furnace body (1), and an electrode rod (3) is provided inside the electrode hole (2), characterized in that, The top of the electrode hole (2) is provided with a sealing plate (4), and the middle part of the sealing plate (4) is provided with a through hole (5). The electrode rod (3) passes through the through hole (5), and the diameter of the through hole (5) is the same as the diameter of the electrode rod (3).
2. The electric furnace electrode flue gas sealing device according to claim 1, characterized in that, The sealing plate (4) is a high-temperature flexible composite fabric.
3. The electric furnace electrode flue gas sealing device according to claim 2, characterized in that, The top of the electrode hole (2) is provided with a support plate (6), the middle of the support plate (6) is provided with a first through hole (7), the upper side of the support plate (6) is provided with a fixing plate (8), the fixing plate (8) is provided with a second through hole (9), the electrode rod (3) passes through the first through hole (7) and the second through hole (9), the sealing plate (4) is located between the support plate (6) and the fixing plate (8), the upper side of the support plate (6) is fixed with a plurality of screws (10) along the circumference of the support plate (6), the upper side of the sealing plate (4) is provided with a plurality of mounting holes (11) corresponding to the screws (10) along the circumference of the sealing plate (4), the upper side of the fixing plate (8) is provided with a plurality of locking holes (12) corresponding to the screws (10) along the circumference of the fixing plate (8), the screws (10) pass through the mounting holes (11) and the locking holes (12), and the screws (10) are provided with nuts (13).
4. The electric furnace electrode flue gas sealing device according to claim 3, characterized in that, A plurality of horizontally arranged support rods (14) are provided along the circumference of the first through hole (7), and the support rods (14) are arranged radially along the first through hole (7).
5. The electric furnace electrode flue gas sealing device according to claim 3, characterized in that, The support plate (6) is horizontally positioned.
6. The electric furnace electrode flue gas sealing device according to claim 5, characterized in that, The screw (10) is set vertically.
7. The electric furnace electrode flue gas sealing device according to claim 3, characterized in that, The first through hole (7) is coaxial with the electrode hole (2) and the diameter of the first through hole (7) is the same as that of the electrode hole (2).