KR101909508B1 - Apparatus for manufacturing sintered ore - Google Patents

Abstract

The present invention relates to an apparatus for manufacturing sintered ores, comprising: a sintering vehicle which is movable along a moving path and in which a space is formed; A plurality of windboxes disposed along the movement path at a lower portion of the sintering vehicle; At least one guide member extending along at least a part of the movement path on the sintering bogie to control the flow of the flue gas therein and a blocking member for blocking leakage of the flue gas Hood; And an exhaust gas circulation pipe connecting the hood to at least a part of the plurality of wind boxes, and the exhaust gas can be efficiently circulated to improve the quality and productivity of the sintered ores.

Description

[0001] Apparatus for manufacturing sintered ore [

More particularly, the present invention relates to an apparatus for manufacturing sintered ores that can efficiently circulate exhaust gas to improve the quality and productivity of sintered ores.

In the process of sinter ore production, fine iron ore is sintered and manufactured to a size suitable for use in a furnace. Generally, in the process of producing sintered ores, sintering blended raw materials obtained by mixing minute iron ores, binders, additives, etc. in a drum mixer together with water are pseudo-particles and charged to a predetermined height on a sintered bogie. Then, the upper surface of the upper layer is ignited by an ignition furnace, and the sintered material is burned from the upper part to the lower part by suction by a large suction fan or the like while the sintering bogie proceeds, thereby producing the sintered ores.

On the other hand, the demand for sintered ores increased due to the increase of blast furnace contents and the increase of sintering ratio. Therefore, in order to increase the sintering power, it is necessary to increase the image area of the sintering machine and increase the suction airflow by the enlarged area. There is a method of increasing the capacity of the suction fan by increasing the suction air volume. However, there is also a problem that investment and maintenance costs are also increased due to the necessity of expansion of the exhaust gas cleaning facility. Thus, a method of circulating the flue gas generated in the sintering machine and securing an insufficient amount of air in accordance with the enlargement of the image area has been used.

A method of circulating exhaust gas in a sintering machine includes providing a hood on at least a part of the upper portion of the sintering machine and supplying a part of the exhaust gas discharged through the windbox to the hood so that exhaust gas supplied to the hood by the suction force of the suction fan Layer is passed through. At this time, since the sintered bogie moves along the movement path of the sintered machine, a gap is formed between the hood and the sintered bogie. If proper sealing is not established between the hood and the sintering bogie, a part of the exhaust gas supplied to the hood is leaked between the sintering bogie and the hood, thereby deteriorating the work environment. Further, the exhaust gas leaks into the gap formed when the exhaust gas leaks. If the flue gas is leaked, the air volume of the flue gas supplied to the sintering machine is reduced and the overall sintering productivity is deteriorated. In addition, there is a problem that the environment is contaminated due to harmful substances contained in the flue gas.

KR 1665066 B JP 1994-288680 A

The present invention provides an equipment for manufacturing sintered ores that can efficiently circulate exhaust gas to improve the quality and productivity of sintered ores.

The present invention provides an equipment for manufacturing sintered ores that can suppress leakage of exhaust gas and suppress environmental pollution.

An apparatus for producing sintered ores according to the present invention comprises: a sintering vehicle which is movable along a moving path and in which a space is formed; A plurality of windboxes disposed along the movement path at a lower portion of the sintering vehicle; At least one guide member extending along at least a part of the movement path on the sintering bogie to control the flow of the flue gas therein and a blocking member for blocking leakage of the flue gas Hood; And an exhaust gas circulation pipe connecting the hood with at least a part of the plurality of wind boxes.

The exhaust gas circulation pipe is connected to the hood so as to supply the exhaust gas in a direction crossing the moving direction of the sintered bogie, and the induction member is arranged in a direction intersecting the direction in which the exhaust gas is supplied to the inside of the hood .

The guide member may be provided on at least one side of the hood so as to extend along the longitudinal direction of the hood.

The guide member may include an inclined surface inclined downward toward the inside of the hood.

The blocking member may be formed in a plate shape having an area, and may extend vertically on both sides of the hood facing each other with respect to the moving direction of the sintered bogie.

The blocking member may be rotatable in a moving direction of the sintered bogie.

The blocking member may be installed so that at least part of the blocking member overlaps with the hood inside the hood.

The blocking member may be disposed so as to be divided along the width direction of the sintered bogie.

A pressure gauge for measuring the internal pressure of the hood, an auxiliary pipe connecting the hood and the wind box, and a valve for opening / closing the auxiliary pipe according to the internal pressure of the hood measured by the pressure gauge.

According to the present invention, leakage of exhaust gas can be suppressed or prevented in the exhaust gas circulating sintering process. That is, it is possible to minimize the gap between the movable sintering carriage and the hood, thereby suppressing leakage of the exhaust gas, which may occur in the vicinity of the hood. Therefore, it is possible to suppress environmental pollution caused by exhaust gas leakage and to improve the sintering productivity by improving the net exchange rate of exhaust gas.

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
FIG. 2 is a view showing a state where an exhaust gas leaks from an exhaust gas circulation part of a general sinter orbital manufacturing facility. FIG.
3 is a view showing a structure of an exhaust gas circulation region according to an embodiment of the present invention.
4 shows a cross-sectional structure of a hood according to line AA in Fig. 3; Fig.
Fig. 5 shows the front (or back) structure of the hood shown in Fig. 3; Fig.
6 is a view showing an arrangement state of a blocking member in accordance with a change in height of a raw material layer in a sintering vehicle.
7 is a view schematically showing an apparatus for producing sintered ores according to a modification of the present invention.

Hereinafter, embodiments of the present invention will be described in detail. It should be understood, however, that the invention is not limited to the disclosed embodiments, but is capable of other various forms of implementation, and that these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know completely.

FIG. 1 is a view showing a general sinter orbital manufacturing facility, and FIG. 2 is a view showing a state in which exhaust gas leaks from a flue gas circulation part of a general sintering plant.

Referring to FIG. 1, an apparatus for producing sintered ores includes a plurality of sintered bogies 200 arranged in one direction to be movable and provided with a space for heat-treating a blend material therein, Air is drawn in the lower direction of the sintering bogie 200 and the ignition path 130 for spraying the flame on the blended raw material charged in the sintering bogie 200 And a plurality of windboxes 121 disposed along the movement path 120 below the sintering bogie 200 to sinter the blend material. The sinter orbital production facility includes a hood 310 extending over at least a part of the movement path 120 at the upper part of the sintering bogie 200 and a waste gas circulation system 300 for connecting at least a part of the plurality of wind boxes to the hood 310, And a flue gas circulation unit 300 including a pipe 320.

The traveling path 120 forms a closed loop for rotating the sintering bogie 200 in an endless track manner and includes an upper side movement path for charging and sintering the raw material and a sintering bogie 200 for distributing the sintered light, And a lower side movement path for moving the upper side movement path for the sintering process. The upper side movement path may include a raw material supply section, an ignition section, and a sintering section for charging the raw material into the sintering bogie 200. The lower side movement path may include a sidewall section in which the sintered bogie 200 moves, Lt; / RTI > In this case, the section that is switched from the upper side movement path to the lower side movement path may be the light distribution section 126 where the sintered light is shed. At one side of the light-directing section 126, a crushing device (not shown) for crushing the sintered light to be shone by the sintering bogie 200 and a cooling device (not shown) for cooling the crushed sintered light may be provided.

The raw material supply part 110 may be provided on one side of the movement path 120 to charge the raw material to the sintered bogie 200. The ignition furnace 130 is connected to the raw material supply part 110, respectively. In addition, a plurality of wind boxes 121 may be provided at the lower part of the upper side movement path to suck the inside of the sintering bogie from the lower part of the ignition section to the sintering section. The wind box 121 forms a negative pressure and sucks the inside of the sintered bogie 200 to form a flow of air from the upper part to the lower part of the raw material layer inside the sintered bogie 200 to sinter the raw material.

A duct 122 is connected to the end of the wind box 121 and a first suction fan 124 is installed at the end of the duct 122 to form a negative pressure inside the wind box 121, As shown in Fig. A dust collector 123 is provided in front of the first suction fan 124 in the duct 122 so that the impurities are filtered from a part of the exhaust gas sucked through the wind box 121 and discharged through the chimney 125 . The wind box 121 sucks the outside air to ignite the surface layer of the raw material for sintering and to burn the raw material for sintering so that the sintered ores can be produced.

The flue gas circulation unit 300 includes a hood 310 provided at an upper portion of the sintering bogie 200 at least a part of the movement path 120 and a hood 310 connected to at least one of the plurality of wind boxes 121, And a second suction fan 328 connected to the exhaust gas circulation pipe 320 and the exhaust gas circulation pipe 320 for transferring the exhaust gas discharged through the wind box 121 to the hood 310 can do. At this time, a chamber (not shown) for collecting exhaust gas discharged from the wind box 121 may be provided at one side of the flue gas circulation pipe 320.

The exhaust gas circulating unit 300 may circulate at least a part of the exhaust gas so that it can be reused for producing the sintered ores in the process of sintering the raw material mixture. The exhaust gas circulation unit 300 may be provided to collect and circulate exhaust gas generated in various regions where sintered ores are produced. For example, the exhaust gas circulation unit 300 may be provided to circulate the sintering section or the sintered light by a cooling device for cooling the exhaust gas according to the temperature, the component (oxygen concentration, etc.) of the exhaust gas.

Since the sintered bogie 200 moves along the movement path 120, the hood 310 may be spaced apart from the sintered bogie 200 at a predetermined distance above the sintered bogie 200. Due to such a structural feature, some of the exhaust gas supplied to the hood 310 is not introduced into the raw material layer in the sintering bogie 200, but is introduced into the raw material layer in the sintering bogie 200, It is liable to leak into the formed gap. Therefore, in order to minimize the amount of exhaust gas leaking between the sintering bogie 200 and the hood 310, the hood 310 is provided with an induction member 330 for controlling the flow of the exhaust gas, a hood 310, A blocking member 340 is provided to minimize the gap between the first and second plates 200.

FIG. 3 is a view showing a structure of a flue gas circulation region according to an embodiment of the present invention, FIG. 4 is a sectional view of a hood according to a line AA in FIG. 3, FIG. 6 is a view showing an arrangement state of a blocking member according to a change in the height of a raw material layer in a sintering bogie, and FIG. 7 is a view schematically showing an apparatus for producing sintered ores according to a modification of the present invention. to be. The front and rear sides of the hood 310 and the front and rear sides of the hood 310 are disposed in the direction of movement of the sintered bogie 200. [ Quot; or " both directions " The longitudinal direction of the hood 310 means the moving direction of the sintered bogie 200 and the width direction of the hood 310 means the width direction of the sintered bogie 200. [

Referring to FIG. 3, the hood 310 may be provided to cover the upper portion of the sintering bogie 200 in at least a part of the movement path 120. The hood 310 may be formed to have a semicircular cross-sectional shape in the moving direction of the sintered bogie 200. That is, the hood 310 may be formed in a hollow shape having a curved surface in the width direction of the sintered bogie 200, while the hood 310 is extended along the moving direction of the sintered bogie 200,

An exhaust gas circulation pipe 320 may be connected to one side of the hood 310, for example, one side in the width direction of the sintered bogie 200. The exhaust gas may flow into one side of the hood 310 and flow toward the other side, and may flow into the raw material layer or the sintered layer in the sintered bogie 200.

The guide member 330 is provided in a direction intersecting the direction in which the flue gas flows in the hood 310 and can control the flow direction of the flue gas in the hood 310. The guide member 330 may be provided on both sides of the hood 310. The hood 310 may be continuously provided along the longitudinal direction of the hood 310, for example, along the moving direction of the sintering bogie 200, or may be selectively provided at a portion to which the exhaust gas flows, for example, a portion to which the exhaust gas circulation pipe 320 is connected .

The guide member 330 may be provided on one side and the other side of the hood 310 so as to have an inclined surface inclined downward toward the inside of the hood 310. The exhaust gas flowing into the hood 310 moves along the inner wall of the hood 310 and flows inside the hood 310 on an inclined surface formed on the guide member 330 to be leaked to the outside of the hood 310. [ Can be suppressed.

The guide member 330 is provided on both sides of the hood 310. However, the guide member 330 may be provided only in a direction opposite to one side of the hood 310 into which the exhaust gas flows, that is, only on the other side.

The blocking member 340 is provided on the front and rear surfaces of the hood 310 and on both sides of the hood 310 in a direction intersecting the direction in which the guide member 330 is provided or in a direction parallel to the direction in which the exhaust gas flows into the hood 310, The gap formed between the hood 310 and the sintered bogie 200 can be minimized. The blocking member 340 may be formed in a plate shape having an area and the blocking member 340 may be provided to extend in the vertical direction at the lower portions of the front and rear surfaces of the hood 310. Further, the blocking member 340 may be provided so as to be rotatable with respect to the moving direction of the sintered bogie 200.

Since the front and rear surfaces of the hood 310 are disposed directly above the raw material layer in the sintered bogie 200, the sintered bogie 200 and the saddle bogie 200 are disposed on both sides of the hood 310, Is formed to be larger. In addition, the distance between the hood 310 and the raw material layer may be changed according to a change in the height of the raw material layer charged in the sintering bogie 200 as the operating conditions are changed.

The blocking member 340 may be formed on the front and rear surfaces of the hood 310 so that the lengths of the front and rear surfaces of the hood 310 may be longer than both sides of the hood 310, Effect can be obtained. At this time, the blocking member 340 is formed to have a length corresponding to the minimum height of the raw material layer formed on at least the sintered bogie 200 so as to minimize the distance between the hood 310 and the raw material layer in response to the change in the height of the raw material layer . For example, as shown in FIG. 6 (a), when the height of the raw material layer charged in the sintering bogie 200 is as low as 900 mm, the blocking member 340 may be arranged in the vertical direction. 6 (b), when the height of the raw material layer to be loaded in the sintering bogie 200 is relatively high as about 1500 mm, the blocking member 340 may be inclined. Accordingly, the distance between the hood 310 and the sintering bogie 200 or the raw material layer in the sintering bogie 200 can be shortened to minimize the leakage of the exhaust gas.

Since the height of the raw material layer in the sintered bogie 200 is not always the same in the width direction of the sintered bogie 200, when the blocking member 340 is configured to extend below the hood 310, It may collide with the raw material layer or the sintered layer. Therefore, the blocking member 340 is rotatable in the moving direction of the sintering bogie 200, so that the impact due to the collision between the blocking member 340 and the raw material layer can be alleviated. The blocking member 340 may be provided to extend in the width direction of the hood 310. In this case, if the blocking member 340 partially collides due to the height difference of the raw material layer, the blocking member 340 rotates as a whole, ) And the raw material layer are opened to allow a large amount of exhaust gas to leak. Therefore, the blocking member 340 is divided and arranged in the width direction of the hood 310 to rotate only the blocking member that collides with the raw material layer, thereby minimizing leakage of the exhaust gas.

The blocking member 340 is installed to be rotatable inside the hood 310, and a part of the blocking member 340 is overlapped with the hood 310 to limit the rotation range of the blocking member 310. The blocking member 310 may be rotated by the air flow rate of the exhaust gas supplied into the hood 310 to prevent the hood 310 from being opened between the horn 310 and the raw material layer.

The exhaust gas supplied to the inside of the hood 310 can be prevented from leaking to the outside by using the guide member 330 and the blocking member 340. However, in the emergency operation condition in which the sintered bogie 200 is stopped The suction force of the first suction fan 124 is reduced, so that a positive pressure can be formed inside the hood 310. [ In this case, it is difficult to suppress leakage of the exhaust gas through the induction member 330 and the blocking member 340. Accordingly, a part of the exhaust gas supplied into the hood 310 can be forcibly discharged to the wind box 121, thereby preventing or preventing the exhaust gas from leaking to the vicinity of the hood 310.

7, a pressure gauge 350 for measuring the pressure inside the hood 310 is installed in the hood 310 and a pressure gauge 350 for measuring the pressure inside the hood 310 is installed in the hood 310 and the wind box 121 Can be connected. At this time, the auxiliary pipe 352 may be provided with a valve 354 for opening and closing the auxiliary pipe 352 according to the pressure inside the hood 310 measured by the pressure gauge 350.

When the internal pressure of the hood 310 is measured to be excessively high by the pressure gauge 350, the valve 354 is opened to forcibly discharge the flue gas in the hood 310 to the wind box 121, 310). ≪ / RTI > When the internal pressure of the hood 310 is lowered, the exhaust gas supplied into the hood 310 can be minimized from leaking into the space between the hood 310 and the sintered bogie 200. That is, even when the suction force of the first suction fan 124 is low, the second suction fan 328 operates normally to supply the exhaust gas to the hood 310, It is possible to prevent the exhaust gas from leaking between the hood 310 and the sintered bogie 200 by discharging it to the auxiliary pipe 352 without passing through the raw material layer or the sintered layer in the large sintered bogie 200.

Although the present invention has been described with reference to the accompanying drawings and the preferred embodiments described above, the present invention is not limited thereto but is limited by the following claims. Accordingly, those skilled in the art will appreciate that various modifications and changes may be made thereto without departing from the spirit of the following claims.

110: Feedstock supply unit 120:
121: Wind box 130: by ignition
200: Sintering ladle 300: Flue gas circulation part
310: Hood 320: Flue gas circulation piping
330: guide member 340: blocking member
350: pressure gauge 352: auxiliary piping

Claims (9)

A sintering carriage movable along the movement path and having a space formed therein;
A plurality of windboxes disposed along the movement path at a lower portion of the sintering vehicle;
At least one guide member extending along at least a part of the movement path on the sintering bogie to control the flow of the flue gas therein and a blocking member for blocking leakage of the flue gas Hood; And
And an exhaust gas circulation pipe connecting the hood with at least a part of the plurality of wind boxes,
The exhaust gas circulation pipe is connected to the hood so as to supply exhaust gas in a direction crossing the moving direction of the sintered bogie,
Wherein the guide member includes an inclined surface inclined downward toward the inside of the hood and is arranged in a direction intersecting the direction in which the exhaust gas is supplied to the inside of the hood. delete The method according to claim 1,
Wherein the guide member comprises:
And extending along the longitudinal direction of the hood on at least one side of the hood. delete The method according to claim 1 or 3,
The blocking member
Is formed in a plate shape having an area,
Wherein the sintered bogie extends vertically on both sides of the hood facing each other with respect to a moving direction of the sintered bogie. The method of claim 5,
The blocking member
And the sintering bogie is rotatable in a moving direction of the sintering bogie. The method of claim 6,
Wherein the shielding member is installed so that at least a part of the shielding member overlaps with the hood inside the hood. The method of claim 7,
The blocking member
Wherein the sintering vehicle is divided and arranged along the width direction of the sintering vehicle. The method of claim 8,
A pressure gauge for measuring the internal pressure of the hood,
An auxiliary pipe connecting the hood and the wind box, and
And a valve for opening / closing the auxiliary pipe according to an internal pressure of the hood measured by the pressure gauge.

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