KR20030092910A - Device for removing attached slag on Gas port ring of electro furnace - Google Patents

Abstract

PURPOSE: A device for removing slag stuck to gas port ring of electric furnace roof is provided to effectively collect waste gas and dust necessarily generated when making molten iron by melting scrap by easily separating molten slag of high temperature fused onto the inner wall of the gas port ring. CONSTITUTION: In a gas port ring installed on roof of electric furnace, the device for removing slag stuck to gas port ring of electric furnace roof comprises a slag separation means for coercively separating slag stuck to the inner surface of the gas port ring by supplying cooling gas through the side surface of the gas port ring, wherein the slag separation means comprises a plurality of slits(20) penetratingly formed on the side wall of the gas port ring, supply pipe(21) for supplying cooling gas to the slits, and connection nozzle(24) for connecting the supply pipe to the slits, wherein division plates(22) are projected from the inner surface of the gas port ring with being spaced apart from each other in a certain distance so as to reduce size of the slag stuck to the gas port ring, and wherein the slits are inclined 45 degrees of an angle in a tangential direction of the gas port ring for a horizontal plane and upwardly inclined 30 degrees of an angle to the inner side in a radial direction of the gas port ring so that the cooling gas passing through the slits are introduced toward a proceeding direction of fume gas.

Description

Device for removing attached slag on Gas port ring of electro furnace}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas port ring of an electric furnace loop, and more particularly, to an apparatus for removing an attached slag of an electric furnace roof gas port ring that is capable of easily removing a molten slag fused to an inner wall.

In general, an electric furnace refers to a furnace for heating and melting a metal or alloy using electricity. When a high voltage is applied to three electrodes vertically connected to an upper part of a loop of an electric furnace, high heat arc heat is generated to dissolve scrap metal in the electric furnace. . At this time, a large amount of waste gas and dust is generated in the dissolution process.

The gas port ring is the first gateway installed in the loop to send waste gas, dust, molten slag, etc., generated when melting scraps and subsidiary materials in an electric furnace, and dust is passed through the gas port ring to open gas elbows and sleeves. And it is sent to the dust collector through the open gas duct.

However, in the conventional gas port ring, since the slag does not stick to the gap where the inner wall tube is bent and continues to progress, the gas port ring is entangled with the loop lower slag and the fusion slag is formed inside the elbow above the gas port ring. Overall dust collection becomes poor. In particular, the fusion slag has a high temperature of more than 1000 ℃ because it is difficult for the worker to access and remove, so the entire loop must be replaced, which is the biggest factor in productivity reduction.

In other words, the conventional gas port ring that connects the loop and the elbow to the electric furnace rolls the tube in a spiral shape to make a cylindrical ring, and the tube gap on the outer wall is welded by applying a steel plate to prevent gas or dust from leaking, It takes in and cools a high temperature contact part. The roof-type roof covering the entire furnace is also bent the tube to make the whole circle, and the gap between the tubes is welded by welding the iron plate, and the cooling water is introduced by cooling the loop.

Since the furnace loop and gas port ring are manufactured by bending the tube, the molten slag is easily fused due to the gap between the tube and the tube, and the slag is not fused because of the thick slag. This causes a problem that the load of the loop is increased and causes the opening and closing of the opening and closing operation part and overload.

In particular, the gas port ring installed in the vertical form is fused between the tube and the inner wall of the cylindrical fusion slag is not possible to escape the slag due to the natural fall, the continuous slag fusion proceeds the phenomenon that the inside of the cylinder is completely blocked. It is the cause of facility damage and product quality deterioration due to poor dust collection and external flame discharge.

Therefore, the present invention was devised to meet the above-mentioned problems, and the waste gas and the waste gas inevitably generated when melting the scrap of the electric furnace to easily remove the hot molten slag fused to the inner wall of the gasket ring It is an object of the present invention to provide an apparatus for preventing slag attachment of a roof gas port ring to effectively collect dust and the like.

The present invention also provides an apparatus for preventing slag attachment of a roof gas port ring to protect the bag filter of the dust collector by rapidly lowering the temperature of the fume gas flowing into the duct through the gas port ring. There is this.

1 is a perspective view showing a gas port ring in which the attachment slag removing device according to the present invention is installed;

2 is a partially cutaway perspective view of a gas port ring according to the present invention;

Figure 3 is a partial detailed view of the gas port ring attached slag removal apparatus according to the present invention,

4 is a partial side cross-sectional view of the gas port ring according to the present invention;

5 is a perspective view showing an operating state of the attachment slag removal apparatus according to the present invention,

6 is a cross-sectional view showing an operating state of the attachment slag removal apparatus according to the present invention.

Explanation of symbols on the main parts of the drawings

10 gas port ring 11 support plate

12: coolant jacket 20: slit

21: supply pipe 22: partition plate

23: supply hose 24: connection nozzle

In order to achieve the above object, the present invention is to form a plurality of slits through the side of the gas port ring and to supply the gas for cooling through the slit to forcibly drop off the slag attached to the inner surface of the gas port ring It features.

Here, the cooling gas is preferably supplied to the atmosphere outside the electric furnace equipment.

In addition, the slits form 3-5 pieces along the side of the gas port ring, and each slit is preferably formed to be inclined upward at an angle of about 45 degrees with respect to the horizontal plane.

In addition, the slit is preferably made so that the formation direction is toward the gas port ring exit. This is to allow the cooling gas passed through the slit to be quickly discharged to the elbow with the fume discharged from the electric furnace.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a gas port ring with an attached slag removal apparatus according to the present invention, Figure 2 is a partially cutaway perspective view of the gas port ring according to the present invention, Figure 3 is a gas port ring attachment slag according to the present invention Partial detail view of the removal device.

According to the above drawings, on the roof 110 covering the upper part of the electric furnace 100, waste gas and dust generated when melting scrap and subsidiary materials in the electric furnace 100, fume gas such as dust, molten slag, etc. The gas port ring 10 is installed, and the fume gas is sent to the dust collector through the open gas elbow 120 continuously installed in the gas port ring 10.

Here, the gas port ring 10 of the present invention is vertically installed on the support plate 11 and the support plate 11 installed in the loop 110 of the electric furnace 100, and the cylindrical coolant jacket 12 in which the fume gas is distributed. And cooling means for circulating the cooling water into the cooling water jacket 12 to cool the gas port ring 10, and slag dropping means for dropping slag attached to the inner wall of the gas port ring 10. do.

The cooling means allows the cooling water to flow into the cooling water jacket 12 of the gas port ring 10, the cooling water jacket 12 has a hollow portion inside the cooling water inlet 13 and the cooling water discharge pipe 14 on the outer surface ) Is installed.

Therefore, the coolant introduced into the coolant jacket 12 of the gas port ring 10 through the coolant inlet pipe 13 flows along the coolant jacket 12 to cool the gas port ring 10 and finally, the coolant discharge pipe. It exits through 14 so that the gas port ring 10 is cooled by the continuous circulation of such cooling water.

On the other hand, the slag dropping means is forced to supply the atmosphere outside the electric furnace 100 equipment into the gas port ring 10 to be attached to the inner wall of the cooling water jacket 12 of the gas port ring 10 by the pressure of the supply gas To remove the slag, a plurality of slits 20 formed through the cooling water jacket 12 side of the gas port ring 10 and the slit 20 is connected to the slit 20 to cool the gas for cooling Supply pipe 21 for supplying.

Four slits 20 are formed along the outer circumferential surface of the cooling water jacket 12 at intervals of 90 degrees, and the inner wall of the cooling water jacket 12 divides the attachment slag in order to reduce the size of the attachment slag and easily drop it off. The partition plate 22 has a structure provided between each slit 20.

In addition, according to the present embodiment, the cooling gas flowing through the slit 20 is fixed to the slit 20 so as to smoothly exit the gas port ring 10 together with the fume gas discharged from the electric furnace 100. There is a need to give an angle.

To this end, the slit 20 is formed to be inclined at an angle of 45 degrees with respect to the support plate 11 when viewed from the side with the support plate 11 in a horizontal plane so that a vortex in a predetermined direction occurs in the gas port ring 10. do.

In addition, as shown in FIG. 4, the slit 20 has a structure inclined 30 degrees upward inward with the support plate 11 in a horizontal plane in the radial direction of the gas port ring 10. Cooling gas passing through the flow inflow toward the direction of the fume gas.

Looking at the installation structure of the slit 20 and the supply pipe 21, the supply pipe 21 is installed along the outer side of the cooling water jacket 12 in an annular shape and the supply hose 23 is connected to one side to supply gas, One end is connected to the outside of the slit 20 and one end is connected to each of the slits 20 via a connection nozzle 24 connected to the supply pipe 21.

As shown in FIG. 3, the connection nozzle 24 has an extended structure such that one side thereof corresponds to the slit 20.

Therefore, the cooling gas introduced into the supply hose 23 may be equally supplied to each slit 20 through the supply pipe 21 and the connection pipe.

Hereinafter, the operation of the present invention will be described with reference to FIGS. 5 and 6.

The high-temperature fume gas generated during the operation of the electric furnace 100 exits through the gas port ring 10 and in this process, slag included in the fume gas is attached to the inner wall of the gas port ring 10.

At this time, when the atmospheric gas or nitrogen gas of the outside of the electric furnace 100 through the supply hose 23 is injected into the gas through the slit 20 formed in the cooling water jacket 12 of the gas port ring (10). The slag that is injected and stuck to the inner wall of the coolant jacket 12 is dropped by the injection pressure.

That is, the gas introduced through the supply hose 23 is distributed to the supply pipe 21 and sent to each slit 20 through each connection nozzle 24 installed in the supply pipe 21, and through the slit 20, the cooling water jacket ( 12) It is sprayed inward.

Therefore, the slag fused to the inner wall of the coolant jacket 12 is dropped by the pressure of the gas injected through the slit 20 to fall into the electric furnace 100.

On the other hand, when the fusion slag is eliminated, the gas is introduced into the gas port ring 10 through the slit 20 and the gas thus introduced is discharged to the elbow 120 together with the fume gas discharged from the electric furnace 100. In this process, the fume gas is further cooled and the discharge of the fume gas is accelerated.

That is, as shown in FIG. 5, the gas supplied to the slit 20 through the connection nozzle 24 is injected into the gas port ring 10 in the inclined form of the slit 20, thereby inclining the slit 20. It will cause the flow of oil to

In this rotational flow, the fume gas passing through the gas port ring 10 and the gas for cooling are rapidly mixed to induce rapid cooling of the fume gas, and the fumes are dispersed to allow the slag or the like to form the inner wall of the gas port ring 10. This makes it difficult to fuse to.

According to the apparatus for removing slag of the roof gas port ring according to the present invention as described above, the operator prevents the slag from fusion to the gas port ring and immediately removes the fused slag, thereby allowing the operator to perform the fusion slag in a high temperature state. It can save you the trouble of removing.

In addition, it is possible to maintain the best dust collection state at all times to prevent environmental pollution, equipment damage caused by flame scattering, and to increase the life of the loop to reduce the equipment down time, thereby improving productivity.

In addition, it is possible to protect the dust chamber ratio by sufficiently lowering the temperature of the fume gas.

Claims (4)

In the gas port ring installed in the loop of the electric furnace, And slag dropping means for supplying cooling gas through the side surface of the gas port ring to forcibly drop slag attached to the inner surface of the gas port ring. The method of claim 1, wherein the slag dropping means comprises a plurality of slits formed through the side wall of the gas port ring, a supply pipe for supplying a cooling gas to the slit, a connection nozzle for connecting the supply pipe and the slit Attachment slag removal device of the furnace roof gas port ring. 3. The apparatus of claim 2, wherein the partition plate protrudes at a predetermined interval on the inner wall of the gas port ring to reduce the size of the attachment slag. According to claim 2 or 3, wherein the slit is formed to be inclined at an angle of 45 degrees in the tangential direction of the gas port ring with respect to the horizontal plane, the radial direction of the gas port ring inclined 30 degrees upward toward the inner side And the slag removal apparatus of the furnace loop gas port ring in which the cooling gas passing through the slit flows in the direction in which the fume gas flows.