KR20120103305A - Device for air permeability of mixed raw material in sintering trailer - Google Patents

Abstract

PURPOSE: A ventilation device for blended materials in a carriage of a sintering machine is provided to maintain constant negative pressure of a wind box, thereby stabilizing the transfer speed of a sintering carriage. CONSTITUTION: A ventilation device for blended materials in a carriage of a sintering machine comprises a rotary shaft(32) arranged in a transverse direction at the top of a carriage of a sintering machine, disks(34) arranged at regular intervals on the rotary shaft and inserted into bladed materials loaded in the carriage, and a lifting unit installed on the rotary shaft and lifting the rotary shaft to regulate the insertion depth of the disks.

Description

Compound material aeration device for sintering machine cart {DEVICE FOR AIR PERMEABILITY OF MIXED RAW MATERIAL IN SINTERING TRAILER}

The present invention relates to a sintering machine bogie. More specifically, the present invention relates to a compounding material aeration device for a sintering machine balance for controlling the air permeability of the compounding material charged to the balance.

In general, the sintering machine is the main equipment of the sintering plant that produces the sintered ore, the main raw material of the blast furnace. Multiple connected sinter bogies run at a constant speed along the rail. When the empty truck reaches the light-dividing part, the upper light stored in the upper light hopper is charged to the balance and laid on the floor, and then the compound raw material is discharged and charged from the surge hopper. As the trolley loaded with the upper light and the blended raw material passes under the ignition furnace, the surface of the blended raw material loaded on the trolley is ignited. After sintering the blended raw materials as described above, the sintering process proceeds while driving the trolley to the light distribution unit, and the sintered ore sintered is crushed and discharged in a crusher.

The sintering process is performed by applying a suction force to the balance by forming a negative pressure in the wind box provided in the lower portion of the sintering machine bogie. When the main blower is driven, a negative pressure is formed in the wind box, and the compound material loaded on the trolley by the negative pressure sucks air downward from the complexed surface and proceeds downward sintering. The gas sucked by the main blower collects dust from the electric dust collector through the wind box and the gas main duct and is discharged to the outside through the main stack.

When the raw material sintering is vigorous, high heat generated during the exhaust gas sintering is recovered through the operation of the exhaust gas circulating fan and circulated to the upper portion of the trolley running along the rail to dry the moisture contained in the raw material and activate the sintering. When the trolley reaches the crusher, the blended raw material and the top light are distributed in a completely sintered state, and after light distribution, the ball bogie proceeds back to the light dispatching part along the rail and repeats the above process.

However, there is a problem in that the quality of the sintered ore is deteriorated when the air permeability of the blended raw material charged in the balance is not secured in the sintering process.

In addition, in the normal operating state to adjust the moving speed of the bogie in accordance with the negative pressure of the wind box, when the air permeability of the blended raw material is increased in the negative pressure in the wind box and the movement speed of the bogie must be reduced. Therefore, the production operation is inevitable, and there arises a problem that the sintered ore sand phase is lowered.

The present invention provides a compounding material aeration device for a sintering machine truck which can ensure the air permeability of the compounding material loaded on the truck.

In addition, the present invention provides a compound material aeration device of the sintering machine bogie that can control the air permeability of the compound material in accordance with the negative pressure inside the wind box.

To this end, the device is a rotary shaft disposed in the width direction on the upper side of the sintering machine bogie, and the disc is installed at intervals on the rotary shaft and inserted into the compounding material loaded on the bogie, installed on the rotary shaft to raise and lower the rotary shaft of the disc It may include a lifting unit for adjusting the insertion depth.

The elevating unit may include a bearing block installed at both ends of the rotation shaft, and a vertical cylinder installed vertically on the facility and connected to the bearing block.

The apparatus may further include a drive motor fixed to one side of the bearing block and connected to the front end of the rotating shaft to drive the rotating shaft.

The apparatus may further include an air blowing unit for ejecting air into the blended raw material through the disc to lower the charging density in the blended raw material to ensure breathability.

The air blowing unit is formed in the air hole extending along the inside of the rotating shaft, the air shaft for freely coupled to the rotating shaft and supply air to the air hole, connected to the air hole and the rotation shaft in the at least one disc installation position It may include a connection hole formed to penetrate through the surface, the discharge hole is connected to the connection hole and formed to penetrate from the center of the disc to discharge the air through the disc end.

The air ejecting unit detects the sensing piece installed on one side of the disc and the sensing piece when the discharge hole is located inside the compounding material so that the air is discharged only when the discharge hole is located inside the compounding material. Is disposed in the sensing sensor for detecting the sensing piece, may be installed on one side of the air pipe may include a valve for opening and closing the air pipe in accordance with the signal of the sensor.

According to this embodiment as described above, while charging the blending raw material into the sintering machine trolley, while the charging density is uniform, the air permeability is good during the sintering process it is possible to improve the quality of the sintered ore.

In addition, it is possible to maintain the negative pressure of the wind box by improving the air permeability of the blended raw material, it is possible to stabilize the advancing speed of the sintered trolley and increase productivity.

1 is a schematic diagram showing a state in which a blending material aeration device of the sintering machine bogie is installed in a sintering facility according to this embodiment.
Figure 2 is a perspective view showing a compound material aeration device of the sintering machine bogie according to the embodiment.
Figure 3 is an exploded perspective view showing the configuration of the blending material aeration device of the sintering machine bogie according to the embodiment.
4 is a cross-sectional view of the blending material aeration device of the sintering machine bogie according to the embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. As can be easily understood by those skilled in the art, the embodiments described below may be modified in various forms without departing from the concept and scope of the present invention. Where possible the same or similar parts are represented with the same reference numerals in the drawings.

All terms including technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention belongs. Predefined terms are further interpreted as having a meaning consistent with the relevant technical literature and the present disclosure, and are not to be construed as ideal or very formal meanings unless defined otherwise.

FIG. 1 shows a sintering plant equipped with a compounding material vent according to this embodiment.

As shown in FIG. 1, the sintering machine trolley 10 is a structure in which a plurality of trolleys 10 are continuously coupled, and proceeds in a caterpillar form along the rail 12 to load, sinter and distribute the blended raw materials. The process is repeated repeatedly.

The upper light hopper 14 for charging the upper light into the trolley 10, the surge hopper 16 for charging the compounding material, and the upper surface of the compounding material at the entrance side along the advancing direction of the sintering machine cart 10. Ignition furnaces 18 for ignition are arranged continuously. At the exit side, a crusher 19 for processing the sintered ore sintered is provided. A plurality of windboxes 20 are continuously disposed in the lower portion of the sintering machine trolley 10 to suck air into the lower portion of the trolley 10 to sinter the blended raw materials. The windbox 20 is provided with approximately 25, and is connected to the main blower 24 through the suction chamber 22 from the entrance side to the 18th. As a result of the negative pressure applied to the wind box 20 as the main blower 24 is driven, air is sucked from the trolley 10. And the other wind box 20 is connected to the exhaust gas duct 26 for high heat recovery of the exhaust gas. The exhaust gas duct 26 extends to the upper portion of the trolley 10 that travels the fifth to eleventh windboxes 20 at the entrance side. When the exhaust gas circulation fan 28 connected to the exhaust gas duct 26 is driven, high heat generated during sintering is recovered to the exhaust gas duct 26 and radiated to the upper portion of the bogie 10 along the exhaust gas duct 26. Therefore, by the high heat of the exhaust gas returned to the trolley 10, the moisture contained in the compounding material loaded on the trolley 10 can be dried, and the firing of the compounding material can be further activated.

Here, the ventilator 30 increases the air permeability of the blended raw material when the air is sucked by the windbox 20 by lowering the charging density of the blended raw material loaded on the trolley 10. The vent device 30 may be installed close to the surge hopper 16 provided at the entrance side along the traveling direction of the sintering machine cart 10. Thus, immediately after the charging of the blended raw material into the trolley 10 in the surge hopper 16, the breathability of the blended raw material can be secured by the apparatus. In addition to the installation position, a plurality of the apparatus may be disposed along the traveling direction of the sintering machine cart 10.

2 to 4 show the configuration of the compound material aeration apparatus according to the present embodiment.

As shown, the ventilator 30 according to the present embodiment is a rotary shaft 32 disposed in the width direction on the sintering machine trolley 10, the interval is provided on the rotary shaft 32 and the bogie 10 The disc 34 is inserted into the compounding material loaded in the compounding material to form a space for ventilation in the compounding material, and is connected to the rotating shaft 32 via a bearing block 38 to raise and lower the rotating shaft 32. Vertical cylinder 36 for adjusting the insertion depth of the (34).

In addition, the apparatus further includes a drive motor 40 fixed to one side of the bearing block 38 and connected to the front end of the rotation shaft 32, and has a structure for rotating the rotation shaft 32.

The disc 34 has a circular plate structure, and an installation hole is formed at the center thereof so as to be fitted to the rotation shaft 32. It does not specifically limit about the installation number of the original disc 34 provided in the said rotating shaft 32. As shown in FIG. The disc 34 has a structure in which the tip is pointed to be more easily inserted into the compound material from the surface.

In addition, the disc 34 is not particularly limited in thickness, but may be made of a rigid material so as not to be deformed when inserted into the blended raw material.

As shown in FIG. 3, the disc 34 has a flange 35 formed at an outer side thereof in an installation hole, and is fixed to the rotating shaft 32 through a bolt 37 fastened to the flange 35. .

The rotating shaft 32 is disposed in the width direction of the trolley 10 with respect to the traveling direction of the trolley 10 moving along the rail 12. Both ends of the rotating shaft 32 are provided with bearing blocks 38 for rotatably supporting the rotating shaft 32. And the piston rod of the vertical cylinder 36 is connected to the lower end of each bearing block 38 is installed. The vertical cylinder 36 is vertically disposed on both sides of the trolley 10 and fixedly installed on the facility. The bearing block 38 and the upper end of the piston rod may be coupled by a pin 39 and may be welded and fixed integrally.

Accordingly, when the vertical cylinder 36 is stretched and operated, the rotating shaft 32 connected via the bearing block 38 moves up and down in the upper and lower directions from the upper portion of the trolley 10. Therefore, the disc 34 installed on the rotary shaft 32 is moved, and the insertion depth of the compounding material loaded on the trolley 10 is varied.

When the trolley 10 proceeds in the state in which the disc 34 is inserted into the blending raw material, a line is formed in the compound raw material loaded on the trolley 10 in the form of a groove by the disc 34. Accordingly, air is more easily sucked into the groove-type line to ensure the breathability of the blended raw material.

The drive motor 40 is disposed at one end of the rotation shaft 32, and is installed on the bracket 41 extending from the bearing block 38 as in this embodiment. Accordingly, when the vertical cylinder 36 is stretched and driven, the vertical cylinder 36 moves together with the bearing block 38 to maintain the state of being connected to the rotating shaft 32. Reference numeral 42 is a coupling for connecting the drive motor 40 and the rotation shaft 32.

Accordingly, when the driving motor 40 is rotated, the rotating shaft 32 is rotated in one direction, and the disc 34 installed on the rotating shaft 32 is rotated while being inserted into the blended raw material to further secure breathability. In this embodiment, the rotational direction of the rotation shaft 32 by the drive motor 40 is opposite to the traveling direction of the trolley 10. The rotational direction of the drive motor 40 is not particularly limited.

In this embodiment, the drive motor 40 is controlled at a speed corresponding to the running speed of the sintering machine trolley 10. To this end, the drive motor 40 may further include an inverter and an appropriate deceleration mechanism. Since many techniques are disclosed for the control structure of the drive motor 40 by the inverter and the deceleration mechanism, detailed description thereof will be omitted.

On the other hand, the apparatus further includes an air blowing unit for blowing air into the blending material through the disc 34 to lower the charging density of the blending material to increase the air permeability.

The air ejecting unit is an air hole 50 extending along the inside of the rotary shaft 32, the air pipe 52 for freely coupled to the rotary shaft 32 and supply air to the air hole 50, A connecting hole 54 connected to the air hole 50 and penetrating through the surface of the rotating shaft 32 at the at least one disc 34 installation position, and connected to the connecting hole 54 and the disc 34. It is formed through the tip from the center to the discharge hole 56 for discharging air through the end of the disc 34.

As shown in FIG. 4, the air hole 50 is formed along the center at one end of the rotation shaft 32 and communicates with the connection hole 54 at the fastening position of each disc 34. The discharge hole 56 is formed penetrating from the center of the disc 34 to the tip. In the present embodiment, only one discharge hole 56 is formed in the disc 34, but two or more discharge holes 56 may be formed. The outlet hole 56 has an inner end connected to the connection hole 54 to serve as an air inlet, and the outer end serves as an outlet for air at the tip of the disc 34.

Thus, the disc 34 is bolted to the disc 34 in a state in which the disc 34 is inserted into the rotary shaft 32 and the connection hole 54 formed in the rotary shaft 32 is aligned with the discharge hole 56 formed in the disc 34. By fixing to, it is possible to communicate the air hole 50, the connection hole 54 and the discharge hole 56.

The air hole 50 is connected to the air pipe 52 via a rotation joint 58 installed at the tip of the rotation shaft 32. The rotary joint 58 is freely rotated with respect to the rotary shaft 32 and is not particularly limited as long as the structure connecting the pipes, various pipe connection mechanisms can be applied.

In this embodiment, since the discharge hole 56 ejects air only to one side of the disc 34, it is necessary to discharge the air only when the discharge hole 56 is located inside the compounding material.

Accordingly, the air ejecting unit detects whether the discharge hole 56 formed in the disc 34 is inside the blended raw material, and the sensing piece 60 installed at one side of the disc 34 and the discharge hole 56. ) Is placed in the position to detect the detection piece 60 when the inside of the blended material is detected, the detection sensor 62 for detecting the detection piece 60, the air pipe 52 is installed on one side of the detection sensor 62 It further comprises a valve 64 for opening and closing the air pipe (52) in accordance with the signal.

In this embodiment, the sensing piece 60 is installed in a direction opposite to the discharge hole 56 with respect to the center of the disc 34. It is sufficient that the sensing piece 60 is installed only on any one of the plurality of disks 34. The installation position of the sensing piece 60 is not limited to the original plate 34, but may be installed at the position where the rotation state of the original plate 34 can be detected, for example, the rotary shaft 32, and is not particularly limited. . A detection sensor 62 for detecting the detection piece 60 is fixedly installed on the facility in proximity to the detection piece 60. The installation position of the detection sensor 62 is installed at a position corresponding to the position of the detection piece 60 when the outer end of the discharge hole 56 is located deep in the compounding material.

Hereinafter, the operation and control process of the apparatus according to the present embodiment will be described.

When the sintering equipment is driven, the trolley 10 proceeds at a constant speed along the rail 12, and air is sucked into the windbox 20 from the upper side of the trolley 10 by the negative pressure applied to the wind box 20, and the sintering process is performed. This is going on. The proper negative pressure of the wind box 20 is set by the facility control unit, and the apparatus is driven in accordance with the actual negative pressure of the wind box 20 during the sintering process to secure the air permeability of the blended raw materials loaded on the trolley 10. For example, if the appropriate negative pressure of the wind box 20 is set to -17 Kpa, the controller checks whether or not the actual negative pressure in the wind box 20 is greater than or equal to the above value to control drive the apparatus.

When the trolley 10 moves, the driving motor 40 rotates the rotating shaft 32 at a speed corresponding to the moving speed. When the rotating shaft 32 is rotated by the drive motor 40, the disk 34 installed on the rotating shaft 32 is rotated in the direction opposite to the traveling direction of the trolley 10.

As the compounding material loaded on the trolley 10 passes through the original plate 34, a groove-shaped line is formed by the original plate 34 at a predetermined depth on the upper surface of the compounding material. Through the groove-shaped line, air can penetrate into the compounding material, thereby ensuring air permeability of the compounding material.

Meanwhile, when the disk 34 rotates and the sensing piece 60 installed on the disk 34 reaches the position of the sensing sensor 62, the sensing sensor 62 detects the sensing piece 60. According to the detection signal of the detection sensor 62, the valve 64 installed in the air pipe 52 is opened. Accordingly, the compressed air flows from the air pipe 52 into the air hole 50 of the rotary shaft 32, and the discharge hole 56 of the disc 34 communicating with the air hole 50 and the connection hole 54. Is supplied.

The air supplied to the discharge hole 56 is discharged from the tip of the disc 34 to the outside through the discharge hole 56. Here, since the outer end of the discharge hole 56 formed in the disc 34 is currently buried in the compounding material, air is discharged into the compounding material through the discharge hole 56.

Compressed air discharged through the discharge hole 56 is injected into the blending material to form a fine air layer in the densely loaded compounding material loading layer to improve the breathability of the compounding material.

When the disc 34 is continuously rotated so that the sensing piece 60 installed on the disc 34 deviates from the detection sensor 62, the detection sensor 62 outputs the signal, and the valve 64 according to the signal. Is closed to block the air pipe 52. Therefore, as the disc 34 rotates, the compressed air is injected only when the tip of the discharge hole 56 is inside the compounding material. When the tip of the discharge hole 56 is exposed to the outside, the compressed air is not injected.

On the other hand, if the negative pressure of the windbox 20 detected by the sintering equipment is lower than the set value, for example, -17.5 Kpa, it is necessary to further increase the air permeability of the blended raw material, the vertical cylinder (36) ) Will contract.

When the vertical cylinder 36 is contracted and operated, the rotating shaft 32 connected to the piston rod of the vertical cylinder 36 is lowered toward the trolley 10. The disk 34 installed on the rotary shaft 32 is further lowered to penetrate deeper into the compounding material. Therefore, the disc 34 is inserted deeper into the compounding material to form a deeper ventilation line inside the compounding material. Therefore, the air can be deeper into the blended raw material to increase the breathability. As the air permeability of the blended raw material is better, the negative pressure of the wind box 20 is increased to a set value, it is also possible to increase the speed of the sintering machine bogie 10 according to the negative pressure.

On the contrary, when the negative pressure of the windbox 20 rises higher than the set value, the vertical cylinder 36 is extended to raise the rotation shaft 32. As the rotary shaft 32 rises, the disc 34 installed on the rotary shaft 32 rises up on the trolley 10 so that the insertion depth of the compounding material becomes shallow. Therefore, the air permeability for the blended material is reduced, so that the negative pressure of the windbox 20 can be lowered to a normal value.

While the illustrative embodiments of the present invention have been shown and described, various modifications and alternative embodiments may be made by those skilled in the art. Such variations and other embodiments will be considered and included in the appended claims, all without departing from the true spirit and scope of the invention.

10: balance 30: aeration device
32: rotation axis 34: disc
36: vertical cylinder 38: bearing block
40: drive motor 50: air hole
52: air pipe 54: connecting hole
56 discharge hole 60 detection plate
62: sensor 64: valve

Claims (6)

A rotating shaft disposed in the width direction on the sintering machine bogie,
Originally installed at intervals on the rotating shaft and inserted into the compounding material loaded on the trolley,
Is installed on the rotating shaft to raise and lower the rotating shaft to adjust the insertion depth of the disc
Compound raw material aeration device of the sintering machine balance comprising a. The method of claim 1,
The elevating unit is a compound material aeration apparatus of the sintering machine bogie including a bearing block is installed on both ends of the rotary shaft and a vertical cylinder is installed on the equipment and connected to the bearing block. The method of claim 1,
And a drive motor connected to the tip of the rotary shaft to rotate the rotary shaft. The method according to any one of claims 1 to 3,
Compound material aeration apparatus of the sintering machine bogie further comprises an air ejecting unit for ejecting air into the compounding material through the disc. The method of claim 4, wherein
The air blowing unit is formed in the air hole extending along the inside of the rotating shaft, the air shaft for freely coupled to the rotating shaft and supply air to the air hole, connected to the air hole and the rotation shaft in the at least one disc installation position And a connection hole formed to penetrate through the surface, and a discharge hole connected to the connection hole and penetrating from the center of the disc to the tip to discharge air through the disc tip. The method of claim 5, wherein
The air ejecting unit is installed on one side of the disc and a sensing sensor for detecting the sensing piece is disposed in the position to detect the sensing piece when the discharge hole is located inside the compounding material, the air pipe is installed on one side Including a valve for opening and closing the air pipe in accordance with the signal of the sensor, the compound raw material aeration device of the sintering machine bogie so that the air can be discharged only when the discharge hole is located inside the compound material.

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