Sealing device between electrode and holding cylinder for submerged arc furnace

Abstract

The utility model belongs to the technical field of ferroalloy submerged arc furnace equipment, namely a sealing device between an electrode and a holding cylinder for a submerged arc furnace. A ceramic fiber felt and a sealing brick are vertically extruded between an electrode and a holding cylinder, a baffle fixed on the wall of the holding cylinder is arranged below the sealing brick, an annular electric insulation rubber plate is pressed above the ceramic fiber felt, and a pressing plate playing a fixing role is pressed on the electric insulation rubber plate. The pressing plate is fixedly connected with the upper end face of the holding cylinder upper flange through a bolt above the end, close to the holding cylinder, of the electric insulation rubber plate. The sealing bottom is made of the sealing bricks and is good in insulativity, high in hardness and not prone to damage. The ceramic fiber felt is added to the upper portion of the sealing brick, the sealing effect is further enhanced, and the ceramic fiber felt is not prone to falling off due to supporting of the sealing brick. An electric insulation rubber plate top cover is adopted at the top, an inner ring is attached to an electrode, and the sealing performance is better.

Description

Technical Field

[0001] The utility model belongs to the technical field of submerged arc furnaces for ferroalloys, namely a sealing device between the electrode and the holding cylinder of the submerged arc furnace. Background Art

[0002] Traditionally, a simple rubber plate is mostly used for sealing between the electrode shell and the holding cylinder of the submerged arc furnace. Although this kind of sealing can prevent large-particle electrode paste from falling into the gap between the electrode and the holding cylinder during charging, the electrode is always moving downward, driving the rubber plate to move, and a tight seal cannot be formed. Moreover, most of the current medium and large-sized furnaces are closed electric furnaces. If the seal is not tight, it is very easy for the bottom flue gas to leak upward, posing a safety hazard to production. Content of the Utility Model

[0003] The purpose of the utility model is to provide a sealing device between the electrode and the holding cylinder with reasonable, simple and practical structure and strong sealing performance to solve the defects of the traditional structure.

[0004] The technical solution of the utility model is: a sealing device between the electrode and the holding cylinder of the submerged arc furnace, characterized in that a ceramic fiber felt and a sealing brick are squeezed up and down between the electrode and the holding cylinder, a baffle fixed on the wall of the holding cylinder is arranged below the sealing brick, an annular electrical insulation rubber plate is pressed above the ceramic fiber felt, a pressing plate for fixing is pressed on the electrical insulation rubber plate, and the pressing plate is fixedly connected with the upper end face of the upper flange of the holding cylinder through bolts at the upper part of the electrical insulation rubber plate close to the holding cylinder end.

[0005] In the above solution, it further includes:

[0006] A gap is left between the pressing plate and the electrode.

[0007] A gap is left between the baffle and the electrode.

[0008] The advantages of the utility model are: 1. The bottom of the seal adopts a sealing brick with good insulation, high hardness and not easy to be damaged. 2. A ceramic fiber felt is added above the sealing brick, further strengthening the sealing effect. With the support of the sealing brick, the ceramic fiber felt is not easy to fall off. 3. The top adopts an electrical insulation rubber plate top cover, and the inner ring fits the electrode. On the one hand, it can also compact the ceramic fiber felt to make the sealing better. On the other hand, using the electrical insulation rubber plate greatly improves the safety of use. 4. The electrical insulation rubber plate and the pressing plate are both made in split form and arranged staggeredly, with reasonable structure, simple installation and convenient disassembly, greatly reducing the inconvenience brought by production and maintenance.

[0009] The embodiments of the utility model will be further described in detail below in conjunction with the drawings. Brief Description of the Drawings

[0010] Figure 1 It is a structural schematic diagram of the utility model.

[0011] Figure 2 is Figure 1 A top view and a partial sectional view structure diagram. Specific embodiments

[0012] See Figure 1 、 2 The names of the components are as follows: 1. Electrode, 2. Pressure plate, 3. Bolt, 4. Electric insulation rubber sheet, 5. Ceramic fiber felt, 6. Sealing brick, 7. Baffle plate, 8. Holding cylinder.

[0013] See Figure 1 、 2 The sealing device between the electrode for submerged arc furnace and the holding cylinder is composed of a pressure plate 2, bolts 3, an electric insulation rubber sheet 4, a ceramic fiber felt 5, a sealing brick 6, and a baffle plate 7. Between the electrode and the holding cylinder, a ceramic fiber felt 5 and a sealing brick 6 are squeezed up and down. There is an annular baffle plate 7 fixed on the wall of the holding cylinder below the sealing brick 6, and there is a gap between the baffle plate 7 and the electrode 1. Above the ceramic fiber felt 5, an annular electric insulation rubber sheet 4 is pressed. On the electric insulation rubber sheet 4, a pressure plate 2 (ring-shaped, split, convenient for installation and disassembly) for fixing is pressed. The pressure plate 2 is fixedly connected to the upper end face of the upper flange of the holding cylinder through bolts 3 (a total of 12) above the end of the electric insulation rubber sheet 4 close to the holding cylinder, and there is a gap between the pressure plate 2 and the electrode 1.

[0014] See Figure 2 For each level of sectional view, at the same time, the top view shows the pressure plate 2, the electric insulation rubber sheet 4, the ceramic fiber felt 5, the sealing brick 6 and the baffle plate 7.

[0015] Specifically, the baffle plate 7 is fixed inside the holding cylinder 8, leaving a certain gap from the electrode 1. The sealing brick 6 is placed on the baffle plate 7, and the ceramic fiber felt 5 is laid on the sealing brick 6. An annular electric insulation rubber sheet 4 is connected to the upper flange of the holding cylinder 8. The inner ring of the electric insulation rubber sheet 4 is closely attached to the electrode 1. The pressure plate 2 is pressed on the electric insulation rubber sheet 4, leaving a certain gap between the pressure plate 2 and the electrode 1, and is fixed on the upper flange of the holding cylinder with bolts 3 to press the electric insulation rubber sheet 4 and the bottom ceramic fiber felt 5.

[0016] The above description is only the specific embodiments of the present invention, and various examples do not constitute a limitation to the essence of the present invention.

Claims

1. A sealing device between an electrode and a holding tube for an electric arc furnace, characterized in that A ceramic fiber felt (5) and a sealing brick (6) are pressed up and down between the electrode and the holding tube. A baffle (7) fixed to the wall of the holding tube is provided below the sealing brick (6). An annular electrical insulating rubber sheet (4) is pressed above the ceramic fiber felt (5). A fixing pressing plate (2) is pressed on the electrical insulating rubber sheet (4). The pressing plate (2) is fixedly connected to the upper end face of the flange on the holding tube by bolts (3) above the electrical insulating rubber sheet (4) near the end of the holding tube.

2. The sealing device between the electrode and the holding tube for a submerged arc furnace according to claim 1, characterized in that A gap is left between the pressing plate (2) and the electrode (1).

3. The sealing device between the electrode and the holding tube for a submerged arc furnace according to claim 1 or 2, characterized in that A gap is left between the baffle (7) and the electrode (1).

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