KR101065840B1 - Apparatus for covering runner of blast furnace - Google Patents

Abstract

Therefore, a cover device for large hot water is disclosed. Such a blast furnace cover device is provided on both sides of the blast furnace, respectively, so as to move up and down, the side cover to prevent the melt and dust is discharged in the lateral direction, and disposed on top of the side cover to melt and dust up And a moving cover provided at a rear end of the side cover to prevent the discharge from being discharged to the air, and a moving cover provided to seal the large water supply and to move up and down.

Blast furnace, large bath degree, cover, side, moving, scattering, fireproof

Description

A cover device of the blast furnace large bath road {APPARATUS FOR COVERING RUNNER OF BLAST FURNACE}

1 is a process chart showing the process of starting the blast furnace Daetangdo according to the prior art.

FIG. 2 is a perspective view illustrating the blast furnace large waterway cover shown in FIG. 1. FIG.

FIG. 3 is a view showing a wired state inside the blast furnace water bath shown in FIG. 1. FIG.

Figure 4 is a side view showing the blast furnace large water cover device according to a preferred embodiment of the present invention.

5 is a cross-sectional view taken along line “A-A” of FIG. 4.

Figure 6 (a) is a side view of the side cover shown in Figure 4, Figure 6 (b) is a front view.

FIG. 7 is a cross-sectional view taken along the line “B-B” of FIG. 4.

Figure 8 (a) is a plan view of the top cover shown in Figure 4, Figure 8 (b) is a front view.

Figure 9 (a) is a side view of the moving cover shown in Figure 4, Figure 9 (b) is a front view.

10 is a state diagram showing a state in which the opening operation of the exit opening using the opening machine in the state in which the blast furnace cover is attached.

11 is a state diagram showing a state in which the closing operation of the exit port using a closure in the state in which the blast furnace cover is attached.

12 is a view showing a state in which the melt is scattered into the blast furnace large hot water through the outlet of the blast furnace;

The present invention relates to a blast furnace cover device, and more particularly, to improve the structure of the blast furnace cover device to prevent damage to the inside by the melted and hot air coming out and to block harmful dust It is about.

In general, the blast furnace working process as shown in Figure 1, through the upper charging hole of the blast furnace (1) charges the coke and iron ore, blowing hot coke through the air vent (3) in the bottom of the blast furnace Burning to produce heat and reducing gas,

The heat and reducing gas generated in this way reduce and melt the iron ore in the furnace to produce molten iron and slag, and the melt is discharged through the outlet 5 under the blast furnace 1.

Then, the discharged melt flows through the large tap water (7), the melt flows out of the large tap water (7) due to the difference in specific gravity molten iron (about 7) and slag (about 3) having a relatively low specific gravity Layered separation.

The separated molten iron and slag are separated and flowed into the molten iron flowing through the molten iron 11 and the slag flowing in the slag flowing through the slag by the skimmer (not shown) at the rear end of the large bath.

As described above, the molten iron flowing into the molten iron bath 11 is stored in the mixed car 17 through the raceway 15 to be moved to a steel mill, which is a post-process.                         

In the operation step as described above, the large tap degree 11 is provided with a large tap degree cover 9 to seal the large tap degree 11.

At this time, the large hot water cover 9 covers the upper part of the large hot water flow 7 through which melts, such as molten water and slag discharged from the outlet 50 of the blast furnace 1, flow from the molten fly or high heat and dust. It is a facility that protects workers and surrounding equipment and prevents solidification by cooling the melt.

As shown in FIG. 2, the large tap water cover 9 may cover the large tap water 7 by having a channel shape, and a refractory may be built therein to withstand high heat.

The large hot water cover 9 is arranged from the blast furnace 1 side in the order of the splash cover 20, the fixed cover 22, the exhaust cover 24, and the skimmer cover 26.

As shown in FIG. 3, the large hot water cover 9 covers the large hot water 7 of the blast furnace 1 so that when the melt is drawn out from the blast furnace 1, it is ejected and scattered at a predetermined angle θ. It also prevents the melt from blowing out to the outside.

However, the large cover also has a problem that the melt can be damaged by splashing and directly contacting the inside.

In other words, since the tapping hole is not completely opened at the beginning of tapping, there is not a lot of melt discharge, and thus the melt drop distance from the taping outlet is short, and the possibility of damaging the cover is also low.

However, when the exit opening is opened for some time, the exit opening is completely open as the ball is enlarged, and the exit hole is enlarged by abrasion, and the amount of melt flows out. The temperature inside the cover also rises to more than 1500 degrees so that the castable fire inside the cover is glowing.

In addition, the large hot water cover as described above has high temperature and high pressure air during the so-called "air bleeding" operation, in which the hot water of the melt and the high pressure (about 1500-1800 degrees) in the furnace are discharged out of the exit port when the discharge of the melt is almost completed. There is a problem that the large hot water cover is damaged by hitting the splash cover and the fixed cover of the large hot water also.

Accordingly, the present invention is to solve the conventional problems as described above, an object of the present invention by improving the structure to minimize the direct contact of the molten molten melt in the large hot water cover to prevent the large hot water damage of the cover The present invention also provides a cover device.

In addition, another object of the present invention is to provide a large hot water cover device that can improve the working environment and prevent environmental pollution by preventing the high-temperature, high-pressure dust is discharged into the atmosphere during the deodorization work.

In order to achieve the above object, a preferred embodiment of the present invention is provided on each side of the blast furnace to be able to move up and down, respectively, the side cover to prevent the discharge of the melt and dust in the lateral direction, and on the top of the side cover Arrangement of the blast furnace cover device comprising an upper cover disposed to prevent the discharge of the melt and dust upward, and a moving cover which is provided at the rear end of the side cover to seal the large hot water and to be able to move up and down to provide.

Hereinafter, with reference to the accompanying drawings will be described in detail a large bath cover device according to an embodiment of the present invention.

As shown in Figures 4 and 5, the large bath cover device proposed by the present invention is provided adjacent to the blast furnace 100 to prevent the external outflow of the melt eluted from the outlet 120.

The large bath cover includes a side cover 300 provided at the left side and the right side adjacent to the blast furnace 100, an upper cover 400 disposed at an upper portion of the side cover 300, and the side cover. And a moving cover 200 provided at a rear end of the cover 300. The rear end of the moving cover 200 is provided with an exhaust cover 161 covering the exhaust port 133 and a skimmer cover 162 covering the skimmer.

 In the large bath cover having the above structure, the side cover 300 is formed in a pair, as shown in Figure 4, Figure 6 (a), Figure 6 (b), and Figure 7, 300 are respectively installed on both sides.

The side cover 300 is a base fixed to the ground (Base; 305), the cylinder provided on the upper portion of the base (305) (Cylinder; 304) and the upper portion of the cylinder 304 integrally It is made of a side plate plate 351 to seal the side.

In addition, the water supply line 211 and the drain line 212 connected to the cooling water system 213 are disposed outside the side plate plate 351 so that the cooling water 210 is passed through.

In addition, a refractory 352 is provided inside the side plate plate 351, and the refractory 352 is supported by an anchor 353.

Therefore, it is possible to prevent the side cover 300 from being deformed by the radiant heat of the melt discharged from the blast furnace 100.

In addition, the cylinder 304 preferably means a hydraulic cylinder, and the hydraulic supply line 206 and the hydraulic drain line 207 of the hydraulic system 208 are connected to the plurality of hydraulic cylinders 304, respectively.

Therefore, the cylinder 304 can raise and lower the side plate plate 351 by reciprocating up and down during the hydraulic action.

In addition, the upper cover 400 is provided on the top of the side cover 300, as shown in Figures 4, 7, 8 (a) and 8 (b), the H-beam It is fixed to the H beam 401 by bolts (not shown) horizontally.

The upper cover 400 includes an upper plate 451 for sealing the upper surface, and the water supply line 211 and the drain line 212 connected to the cooling water system 213 are disposed outside the upper plate 451 so that the coolant ( 210) is passed through.

In addition, a refractory 452 is provided inside the upper plate 451, and the refractory 452 is supported by an anchor 453.                     

Therefore, it is possible to prevent the upper cover 400 from being deformed by the radiant heat of the melt discharged from the blast furnace 100.

On the other hand, the moving cover 200 has a tapered shape, as shown in Figure 4, 5, 9 (a), 9 (b), the height of the rear end is formed lower than the tip.

The moving cover 200 is formed of a horizontal portion and a vertical portion to form an outer panel 251 having a “∩” shape, and a driving source provided below the outer panel 251 to drive the outer panel 251 up and down ( 204 and a connection part 250 connecting the driving source 204 and the outer panel 251 to each other.

The water supply line 211 and the drain line 212 connected to the cooling water system 213 are disposed outside the outer panel 251 so that the cooling water 210 passes through.

In addition, a refractory 252 is provided inside the outer panel 251, and the refractory 252 is supported by an anchor 253.

Therefore, it is possible to prevent the moving cover 200 from being deformed by the radiant heat of the melt discharged from the blast furnace 100.

In addition, the drive source 204 preferably includes a hydraulic cylinder, and the hydraulic supply line 206 and the hydraulic drain line 207 of the hydraulic system 208 are connected to the plurality of cylinders 204, respectively.

Therefore, the cylinder 204 can raise and lower the outer panel 251 through the connecting portion 250 by reciprocating up and down during the hydraulic action.

The connection part 250 is fixedly connected to the driving plate 204 and the rear panel of the outer panel 251 and the end of the fixed plate 201 is hingedly attached to the cylinder Arm 202 and a connecting bar 203 connecting the arm 202 to the tip of the outer panel.

The arm 202 preferably has a triangular shape and transmits the power of the drive source 204 to the connection bar by performing a central function of connecting the stationary plate 201, the drive source 204, and the connection bar 203 to each other. do.

Of course, the arm 202 is not limited to a triangle, and may include all shapes such as a square and a pentagon.

Therefore, the connecting part 250 having such a structure pulls the connecting bar 203 by rotating the arm 202 clockwise when the piston 216 of the driving source 204 is reversed, and the connecting bar 203. ) Is pulled downward, the front end portion of the outer panel 251 of the moving cover 200 is pulled downward.

In this state, when the piston 216 of the drive source 204 is advanced, the front end of the outer panel 251 pulled down by the connection bar 203 is pushed back to return to the original position.

Then, the large water cover of the structure as described above increases the size by improving the structure. That is, the height of the side cover 300 is increased from 660mm from 2500mm to 3160mm, the moving cover 200 is the height of the front end and rear end 800mm to 800mm, the front end height is 1630mm 830mm is increased.

Therefore, it is possible to minimize the molten material flying from the tap opening contacting the inside of the large hot water cover.

Hereinafter, with reference to the accompanying drawings will be described in more detail the operation process of the large tap water cover according to an embodiment of the present invention.

As shown in Figure 4 and Figures 10 to 12, the large bath cover proposed by the present invention is a side cover (300) from the blast furnace side and an upper cover disposed on the upper side of the side cover (300) (Upper cover; 400), and the moving cover (Moving cover; 200) provided in the rear end of the side cover 300 is arranged in order.

In this state, when the tapping work of the blast furnace 120 is performed, first, the tapping opening 120 is opened.

That is, when opening the outlet 120, as shown in FIG. 10, the moving cover 200 and the side cover 300 are lowered, respectively, and then, the opening machine 600 is entered to open the outlet 120. Penetrated,

In more detail, when the side cover 300 is lowered, a plurality of hydraulic cylinders 304 are driven through the hydraulic supply line 206 and the hydraulic drain line 207 of the hydraulic system 208.

The side plate plate 351 may be lowered by the driving of the hydraulic cylinder 304.

In addition, when the moving cover 200 is lowered, the arm 202 is rotated clockwise by reversing the piston 216 of the driving source 204, and the moving cover 203 is pulled downward to move the moving cover. The tip of the outer panel 251 of the 200 is lowered.

As described above, after the moving cover 200 and the side cover 300 are lowered, the opening machine 600 may enter the inside of the large bath cover to proceed with the opening work.

When the penetration opening 120 is completed, the opening machine 600 is retracted and the moving cover 200 and the side cover 300 are lifted from the hydraulic operation unit 209 to perform the starting operation.

In addition, the molten material P eluted from the tap opening 120 during the tapping operation is scattered while maintaining a constant angle θ to reach a predetermined distance inside the large bath.

In this case, since the size of the large-scale water cover is considerably increased, since the melt P scattering falls before reaching the inside of the large-water cover, direct contact with the inside of the cover may be minimized.

Particularly, when the blast furnace work is carried out at the end of the blast furnace emergency operation and the drawing work, the high temperature (1500 degrees or more) and the high pressure (3 to 5 kg / cm 2) that are concentrated in the upward direction of about 10 degrees from the blast furnace tap opening 120 Melt P made of molten iron and slag is minimized to directly hit the side cover 300, the top cover 400 and the moving cover 200, thereby protecting the refractory of the respective cover (200, 300, 400).

On the other hand, when the drawing work is completed in this way, the closing process of the tap opening 120 proceeds.

In this exit opening closing process, as shown in FIG. 11, only the side cover 300 to which the closing device 500 enters is lowered by operating the cylinder 304.

The other side cover 300, the upper cover 400, and the moving cover 200 are closed by turning the closing device 500 in a mounted state to close the exit port 120.

Therefore, since the closing operation is possible in the state in which only one side cover 300 is lowered as described above, when the blast furnace operation is performed at the end of the blast furnace emergency operation and the starting operation, a large amount of high concentration of high temperature and high pressure from the blast furnace outlet 120 is obtained. (212 mg / m3) of dust can be prevented from being released into the atmosphere.

Through the above process, the melt and the dust can be minimized to contact the inside of the large hot water cover.

In addition, since the cooling system 210 is continuously supplied from the cooling system 213 during the drawing operation or during the drawing waiting, it is possible to prevent each cover 200, 300, 400 from being deformed by the radiant heat of the melt P. FIG.

As described above, the large hot water cover according to a preferred embodiment of the present invention has an improved structure, thereby increasing the height and width of the cover, thereby preventing the melt and dust from scattering during the starting work to come into contact with the inside of the cover. In addition, there is an advantage that the maintenance work associated with the loss is greatly reduced to reduce the production cost and the raw unit of the refractory.

In addition, when closing the exit port, only one side cover can be closed in the state of lowering, so air pollution can be prevented by preventing a large amount of dust emitted during the blast furnace emergency operation and the end of the exit operation. At the same time, there is an advantage that can protect workers and prevent safety accidents in hazardous work places where high heat and gas dust are generated.

Claims (9)

A side cover which is provided on both sides of the blast furnace to be able to move up and down, respectively, to prevent the melt and the dust from being discharged laterally; An upper cover disposed above the side cover to prevent the melt and the dust from being discharged upward; And A large hot water cover device is provided at a rear end of the side cover and includes a moving cover that seals the large hot water road and is provided to be able to move up and down. The method of claim 1, The side cover is composed of a pair of side covers, the pair of side covers are provided on the base, the upper and lower cylinders that can be raised and lowered, integrally mounted on the upper portion of the cylinder to seal the side, When the cylinder is driven, a large hot water cover device comprising a side plate capable of lifting each. The method of claim 1, The upper cover is a large water tap cover device including a top plate fixed to the beam provided in the blast furnace adjacent position. The method of claim 1, The moving cover transmits power from an external panel to the external panel by connecting the external panel covering the large hot water, a driving source provided below the external panel to drive the external panel up and down, and connecting the driving source and the external panel to each other. A large hot water cover device including a connection portion for raising and lowering the outer panel. The method of claim 4, wherein And the outer panel has a tapered shape in which the height of the side cover direction side is higher than the opposite direction. The method of claim 4, wherein The drive source is a large tap water cover device including at least one hydraulic cylinder. The method of claim 4, wherein The connection part may include a fixed plate for fixedly connecting one side of the drive source and the outer panel, an arm hingeably attached to a distal end of the fixed plate, and a connecting bar for connecting the arm and the other side of the external panel. Large bath cover device including. The large hot water cover device according to any one of claims 2, 3, and 4, wherein the side plate plate, the upper plate, and a refractory supported by an anchor are provided inside the outer panel. The method of claim 1, The side cover, the top cover, and the moving cover has a size of more than a predetermined size can cover the molten water from the blast furnace to reach the inside of the covers.

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