KR100829967B1 - Device for scattering lime of roof of electric furnace - Google Patents

Abstract

An object of the present invention is to be installed in the loop to periodically remove the current attached to the loop by using the quicklime injection pressure around the injection tube to which the quicklime is injected to prevent the blockage of the blown pipe and to efficiently take the quicklime It is to provide a quick lime input device of the furnace loop.

Accordingly, the present invention is installed in the end of the quicklime feed inlet pipe extending in the upper portion of the loop in the electric furnace loop and is connected to the inside of the loop to discharge the quicklime, and is installed in communication with one side of the inlet pipe Blowing means for striking the now attached to the outside, the quicklime of the electric furnace loop characterized in that it is installed in the blowing pipe and switching means for operating the striking means by selectively applying the quicklime injection pressure to the striking means; Provide an input device.

Blown pipe, branch pipe, blow plate, inner pipe, drive motor

Description

Device for scattering lime of roof of electric furnace

1 is a perspective view showing a loop of an electric furnace in which a quicklime input device is installed according to the present invention;

2 is a side cross-sectional view of a loop in which an input device according to the present invention is installed;

3 is a block diagram of a quicklime input device according to the present invention,

Figure 4, Figure 5 is a schematic cross-sectional view showing the operating state of the quicklime input device according to the present invention,

6 is a partially cutaway side view of the furnace loop according to the prior art.

Explanation of the protection of the main parts of the drawing

10 loop 20 input tube

30: blown pipe 40: blow plate

41: branch pipe 42: operation bar

43: pressure plate 44: elastic spring

50: internal 51: distribution port

52: drive motor 60: one-way valve

The present invention relates to a loop of an electric furnace, and relates to a quicklime input device installed in a loop to inject quicklime into a furnace.

In general, an electric furnace refers to a furnace for heating and dissolving a metal or an alloy using electricity. When a high voltage is applied to three electrodes vertically connected to an upper portion of the electric furnace, high heat arc heat is generated to dissolve scrap metal in the electric furnace.

The melting of scrap iron is a phenomenon that breaks down by applying a high power to the scrap metal, and a lot of heat is generated, in particular molten iron and currents scattered during melting are dispersed outside the furnace body.

In order to prevent this external injection, the furnace body is composed of a lead, and the lead is consumed by erosion by arc heat and other stress of the electrode in the process.

Therefore, in order to prevent such local wear of the inner lead, slag preparation quicklime is introduced into the furnace.

The quicklime is usually introduced through a loop covering a top of a basket or an electric furnace used for supplying scrap metal to an electric furnace, and in the case of the loop, the quicklime is placed on the top of the loop 100 as shown in FIG. 6. A plurality of quicklime inlet pipe 110 is installed and the inlet pipe 110, the end of the inlet 120 is in communication with the upper end of the loop 100 is installed to discharge the quicklime into the furnace through the inlet 120 It is.                         

However, the conventional structure described above has a problem that fugitive and slag are fused around the intake hole installed in the roof to block the intake hole, thereby making quick injection of quicklime.

In other words, the upper part of the loop is composed of cooling pipes to block high heat, and in the initial stage of dissolution, swelling and slag are scattered to the inlets exposed between the cooling pipes.

Slag and Attachment Now adheres to the interior of the loop and extends continuously to completely block the intake of quicklime.

As such, when the tip of the intake is blocked, the quicklime injection rate is lowered, and thus, a long time is required, which makes it difficult to insert an appropriate amount of quicklime.

Therefore, in the prior art, the worker climbed on the upper part of the roof to remove the now attached by hitting the tip of the blown pipe, but this operation has a high risk of safety accidents of the worker.

The present invention has been made in order to solve the above problems, it is installed in the loop to prevent the clogging of the blown pipe by periodically removing the current attached to the loop by using the quicklime injection pressure around the blown pipe is inserted into the quicklime It is an object of the present invention to provide a quicklime input device of an electric furnace loop capable of efficiently blowing quicklime.

The input device of the present invention for achieving the above object is installed in the end of the quicklime feed inlet pipe extending to the upper portion of the loop in the electric furnace loop communicate with the inside of the loop and the injection pipe for discharging the quicklime, Blowing means for striking the now attached to the outside of the blown pipe communicating with one side of the pipe, switching means for operating the blower by selectively applying the quicklime injection pressure to the blower means installed in the blown pipe.

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

1 is a perspective view illustrating a loop of an electric furnace in which a quicklime injector according to the present invention is installed, FIG. 2 is a side cross-sectional view of a loop in which an injector according to the present invention is installed, and FIG. 3 is a configuration of a quicklime injector according to the present invention. It is also.

According to the above drawings, the loop 10 of the electric furnace is manufactured by bending the tube 11 through which the coolant passes, making the whole circle, and the gap between the tube 11 and the tube 11 by welding the iron plate. And the upper part is formed with a hole 12 is inserted into the three electrode rods, one side is provided with a gas port ring 13 connected to the elbow so that the fume is discharged.

In the present invention, in the electric furnace loop 10 having the above-described structure, the quicklime supply inlet tube 20 extending upward from the roof 10 and the end of the inlet tube 20 are installed at each end of the loop 10. Blow blow means for hitting the now attached to the blown pipe (30), the injection pipe 20, one side of the inlet pipe (20) is connected to the inner side is discharged to the quicklime, the blown pipe (30) And switching means for operating the striking means by selectively applying the quicklime injection pressure to the striking means.

Therefore, the quicklime supplied to the feed pipe 20 according to the operation of the switching means is introduced into the furnace through the blown pipe 30 or applied as a blow means if necessary to operate the blow means by providing the injection pressure of quicklime to the blow means. By doing so, the attachment of the main surface of the blown pipe 30 is now dropped.

The blown pipe 30 is installed in communication with the roof 10 vertically and the end of the input pipe 20 is connected to the side of the blown pipe (30).

In addition, the hitting means is inserted into the loop 10 through the gap between the tube 11 and the tube 11 forming the loop 10 close to the outside of the blown pipe 30 is installed to be moved up and down Plate 40, branch pipe 41 extending a predetermined length to the lower end of the input pipe 20, the operating bar 42 is installed vertically on the top of the blow plate 40 is inserted into the branch pipe 41, the operation The pressure plate 43 is installed at the top of the bar 42 and is in close contact with the inner circumferential surface of the branch pipe 41, and includes an elastic spring 44 elastically installed between the pressure plate 43 and the bottom surface of the branch pipe 41.

Therefore, when the injection pipe 20 and the blown pipe 30 are blocked, the injection pressure of quicklime is applied to the branch pipe 41 to pressurize the pressure plate 43 located in the branch pipe 41 and the pressure plate 43 is lowered. As such, the striking plate 40 protrudes into the loop 10 to drop the now attached to the inside of the loop 10.

On the other hand, the switching means is formed in the inner pipe 50 is inserted into the injection pipe 30, the inner pipe 50 side is formed in communication with the end of the injection pipe 20, the injection pipe 30 Installed on the top and connected to the upper end of the inner tube 50 through the upper portion of the blown pipe 30 comprises a drive motor 52 for rotating the inner tube (50).

According to the present embodiment, the distribution port 51 is made of the same diameter as the inner diameter of the inlet pipe 20 at the same height as the inlet pipe 20, and smoothly rotates the inner tube 50 with respect to the inlet pipe 30. A plurality of idle rolls 53 are installed along the side of the blown pipe 30, and the idle roll 53 protrudes slightly inward from the inner circumferential surface of the blown pipe 30 so as to be in close contact with the inner pipe 50. It is.

Reference numeral 60 which is not described here is a one-way valve installed in the input pipe 20.

The one-way valve is to be opened only to the intake pipe 30, so that the quick-lime is opened only in the direction in which the quicklime proceeds, and the reverse flow is blocked.

Hereinafter, the operation of the present invention will be described with reference to FIGS. 4 and 5.

When a signal for inputting quicklime into the electric furnace is given, the driving motor 52 of the apparatus is operated.

When the driving motor 52 operates, the inner tube 50 installed on the shaft of the driving motor 52 rotates inside the blowing tube 30.

As the inner tube 50 rotates, the distribution port 51 formed on the side of the inner tube 50 repeats the coincidence state and the disagreement state with the end of the inlet tube 20.

That is, when the inner tube 50 is rotated so that the distribution port 51 formed in the inner tube 50 is located at the tip of the inlet tube 20, the inlet tube 20 and the inner tube 50 mediate the inlet tube 20. The other end is in a state of communicating with each other, and in other cases, the distal end of the inlet pipe 20 is closed by the side of the inner tube 50, and the inlet pipe 20 is blocked.

When the quicklime is transferred through the input tube 20 in the process of the end of the input tube 20 is opened and blocked, the quicklime proceeds along the input tube 20 by the pressure of the carrier gas.

As the quicklime proceeds along the inlet tube 20, when the distribution port 51 of the inner tube 50 comes to a position coinciding with the tip of the inlet tube 20, the quicklime that proceeds along the inlet tube 20 is a distribution port ( 51 is introduced into the inner tube 50 is injected into the electric furnace through the loop 10.

At this time, the one-way valve installed in the inlet pipe 20 does not affect the progress of the quicklime because it opens in the direction of the quicklime.

Then, when the inner tube 50 is rotated by the rotation of the motor 52, the distribution port 51 coincides with the distal end of the inlet tube 20, while deviating from the distal end of the inlet tube 20, on the side of the inner tube 50. The tip of the input pipe 20 is blocked.

When the input pipe 20 is blocked, the carrier pressure supplied through the input pipe 20 does not escape through the tip of the input pipe 20 and is applied to the branch pipe 41 at the bottom of the input pipe 20.

Therefore, the pressure plate 43 located in the branch pipe 41 is pressed down by the quicklime input pressure applied to the branch pipe 41, and the operation bar 42 is applied to the pressure plate 43 as the pressure plate 43 is pushed down. The striking plate 40 installed as a medium descends into the loop 10 to protrude into the loop 10.                     

As the lower end of the striking plate 40 enters into the roof 10 and protrudes, the bottom of the striking plate 40 is now attached to the periphery of the blown pipe 30 of the loop 10 and is pushed out by the tip of the striking plate 40.

On the other hand, when the inner tube 50 is continuously rotated in accordance with the operation of the drive motor 52 again the flow port 51 of the inner tube 50 and the tip of the input tube 20 is in communication with the quicklime again through the inner tube 50 The pressure plate 43 is raised by the elastic return force of the elastic spring 44 while the pressure is applied to the inside of the furnace and the pressure plate 43 is released to return the striking plate 40 to its original position.

While the quick lime input operation in the furnace continues, the above operation is repeated to immediately remove the attachment around the blown pipe 30.

As described above, according to the quicklime input device of the furnace loop according to the present invention, the current attached to the quicklime input point of the loop can be easily removed during quicklime input operation, thereby improving the quickening efficiency of quicklime.

In addition, the time and effort required for removal work can be reduced, and safety accidents can be prevented in advance.

In addition, the now removal of the loop has the additional effect of improving the life of the plant.

Claims (3)

In the furnace loop, Blowing pipe which is installed at the end of the quicklime feed inlet pipe extending to the upper part of the loop and communicated with the inside of the loop to discharge the quicklime, and blows to strike the now attached to the outside of the blowing pipe in communication with one side of the inlet pipe Means, installed in the blowing pipe, and switching means for operating the striking means by selectively applying the quicklime injection pressure to the striking means, The striking means is a striking plate installed to be moved up and down through the loop inside close to the outer side of the blown pipe, a branch pipe extending a predetermined length at the lower end of the inlet pipe, vertically installed at the top of the blow plate is inserted into the branch pipe The operating bar is installed on the top of the operating bar, the pressure plate is in close contact with the inner circumferential surface of the branch pipe, quicklime input device of the furnace loop characterized in that it comprises an elastic spring is elastically installed between the pressure plate and the bottom of the branch pipe. delete According to claim 1, wherein the switching means is the inner tube is inserted into the injection pipe and the inner tube is formed on the side of the inner tube is in communication with the end of the inlet pipe, installed on the top of the blowing pipe and the top of the inner pipe through the top of the blowing pipe Quicklime input device of the furnace loop characterized in that it comprises a drive motor connected to rotate the inner tube.

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