KR20160038117A - Apparatus and method for charging raw material - Google Patents

Apparatus and method for charging raw material Download PDF

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Publication number
KR20160038117A
KR20160038117A KR1020140129942A KR20140129942A KR20160038117A KR 20160038117 A KR20160038117 A KR 20160038117A KR 1020140129942 A KR1020140129942 A KR 1020140129942A KR 20140129942 A KR20140129942 A KR 20140129942A KR 20160038117 A KR20160038117 A KR 20160038117A
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KR
South Korea
Prior art keywords
raw material
charging chute
charging
sintering
sinter
Prior art date
Application number
KR1020140129942A
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Korean (ko)
Inventor
손상한
김용인
Original Assignee
주식회사 포스코
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Publication date
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Priority to KR1020140129942A priority Critical patent/KR20160038117A/en
Publication of KR20160038117A publication Critical patent/KR20160038117A/en

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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/16—Sintering; Agglomerating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B21/00—Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/10—Charging directly from hoppers or shoots
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/12—Travelling or movable supports or containers for the charge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D2003/0085—Movement of the container or support of the charge in the furnace or in the charging facilities
    • F27D2003/0093—Movement on a slope
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/12—Travelling or movable supports or containers for the charge
    • F27D2003/125—Charging cars, lift trolleys

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Manufacturing & Machinery (AREA)
  • Environmental & Geological Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

The present invention relates to a raw material charging apparatus and a charging method for inducing vertical segregation of a raw material for sinter to be loaded on a sintering vehicle by forming an air film on the surface of a charging chute charged with a sintering raw material.
A raw material charging apparatus according to one embodiment of the present invention is a device for charging a raw material for sinter into a sintering bogie and includes a raw material supply unit for supplying raw materials for sintering and a raw material supply unit for supplying raw materials for sinter supplied from the raw material supply unit, And a plate-shaped charging chute disposed obliquely below the charging chute, wherein the charging chute penetrates the upper surface from the inside, and air is sprayed to form an air film on the upper surface of the charging chute.

Description

[0001] Apparatus and method for charging raw material [

The present invention relates to a raw material charging apparatus and method, and more particularly, to a raw material charging apparatus for forming an air film on a surface of a charging chute for charging a raw material for sinter into a sintering vehicle to induce vertical segregation of the raw material for sinter And a charging method.

Generally, in the sintering plant, the sintering material is charged into the sintering machine of the sintering machine using the material charging device to produce the sintered ores.

1 is a view showing a general sintering material charging apparatus.

As shown in FIG. 1, a general sinter raw material charging apparatus comprises a sinter raw hopper (2) containing a sinter raw material (1) containing a raw material such as fine iron ore, limestone, and a fine coke as a fuel and sintered raw material And a dream feeder 3 for feeding the raw material hopper 4 through a hopper gate 4 and a dream feeder 3 for feeding the sintered raw material to a chute 5 for loading the sintered raw material above the bottom light Consists of. The chute 5 is made of a swash plate, and serves to classify the sintering raw material so that the sintering raw material of small particles is charged into the upper part of the sintered bogie 8 and the raw material of sintering of large particles is charged into the lower part thereof. When the sintering raw material 1 is charged into the sintering bogie 8, the surface of the sintering raw material is uniformly smoothed by the surface puck plate 6 and ignited in the ignition furnace 7 and sucked downward from the airfoil by the suction blower The sintering reaction is promoted by combustion of the coke contained in the sintering raw material by air to produce sintered ores.

In such a sintering operation, the charging state of the sinter raw material loaded on the sintering bogie is one of important factors for determining the permeability. Therefore, it is necessary to artificially induce the vertical segregation according to the particle size of the sintered raw material by arranging the sintered raw material having a large particle size in the lower portion of the sintered raw material loaded on the sintered bogie and locating the small sintered raw material on the upper portion.

When the vertical segregation according to the particle size is effectively promoted, the thermal imbalance phenomenon in the sintering machine phase-downward direction is suppressed, and the resistance (air resistance) of the air introduced into the raw material layer in the sintering machine is lowered, thereby improving the productivity of the sintered ores. At this time, it is well known that, if possible, it is best to keep the charging density of the raw material evenly in the sintering machine width direction.

However, there is a problem that the charging density of the raw material, that is, the degree of vertical segregation is lowered due to various variables such as adhesion light generated on the charging chute during the actual operation and collapse of the raw materials accumulated in the sintering vehicle, And thus the quality and productivity of the sintered ores are deteriorated.

Thus, the applicant of the present invention has studied a technique for improving the vertical segregation degree of the raw material for sinter by increasing the horizontal departure speed of the raw material for sinter departing from the charging sludge to the sintering bogie. As a result, -1372913; Patent Document 1), and a charging device and charging method of raw materials (Patent Document 10-1326052; Patent Document 2).

Patent Documents 1 and 2 constitute a charging chute such that the conveying path of the sintering raw material conveyed to the sintering carriage along the charging chute forms a cycloidal curve shape or a pro-cycloid curve curve shape.

Thus, the applicant of the present invention confirmed that Patent Document 1 and Patent Document 2 are effective in inducing vertical segregation of the sintered raw material loaded on the sintering vehicle.

However, the present applicant continued the research and proposed the present invention in view of the fact that the friction between the charging chute and the sintering material can be reduced to further increase the horizontal displacement speed of the raw material for sintering.

Patent No. 10-1372913 (Apr. 03, 2013) Patent No. 10-1326052 (March 31, 2013)

The present invention provides a raw material charging apparatus and method that can minimize the friction generated between a sintering raw material and a charging chute to increase the speed at which the raw material for sinter is separated from the charging chute, thereby inducing vertical segregation of the raw material for sintering.

A raw material charging apparatus according to an embodiment of the present invention is a device for charging a raw material for sinter into a sintering bogie and includes a raw material supply section for supplying raw materials for sintering and a raw material supply section for supplying raw materials for sinter supplied from the raw material supply section to the raw material supply section And a plate-shaped charging chute disposed obliquely below the charging chute, wherein the charging chute penetrates the upper surface from the inside, and air is sprayed to form an air film on the upper surface of the charging chute.

The charging chute has a hollow interior, a plurality of spray holes formed on an upper surface thereof, and a supply piping for supplying air to the interior of the charging chute.

And an injection channel through which air flows from the hollow interior to the respective injection holes is formed on the upper surface of the charging chute.

The diameter of the spray hole formed on the upper surface of the charging chute is preferably 2 mm or less.

Wherein the charging chute is a curved plate.

Wherein the charging chute is a plate having a curved surface in the form of a cycloid curve or a procella intercalated curve.

The charging chute is characterized in that the plate in the form of a plane is arranged at an angle.

A method of charging a raw material according to an embodiment of the present invention is a method of charging a raw material for sinter into a sintering vehicle, comprising: preparing a raw material for sinter; Forming an air film on an upper surface of the charging chute; Supplying the sintering raw material to a charging chute; And transporting the sintering raw material supplied to the charging chute in a floating state in an air film formed on the upper surface of the charging chute, and charging the sintering carrier.

And an air film is formed on the upper surface of the charging chute by passing air through the upper surface of the charging chute in the process of forming the air film on the charging chute.

In the course of charging the sintered bogie, the sintered bogie preferably moves in a direction opposite to a direction in which the raw material for sinter is separated from the charging chute.

According to the embodiment of the present invention, since the air film is formed on the surface of the charging chute for transporting the raw material for sinter to the sintering carriage, the friction between the raw material for sinter and the charging chute is reduced, have.

As the speed at which the raw material for sinter is released from the charging chute is increased, the raw material for the large sinter is separated from the charging chute by a relatively long distance, and the raw material for the small sinter is separated from the charging chute by a relatively short distance, It is possible to induce vertical segregation according to the particle size of the sintered raw material to be loaded, thereby improving the air permeability in the raw material layer and improving the quality and productivity of the produced sintered ores.

Further, there is also an effect that it is possible to prevent the sintering raw material from adhering to the charging chute as the air film is formed on the surface of the charging chute.

1 is a view showing a general sintering raw material charging apparatus,
FIG. 2 is a view showing a raw material charging apparatus according to an embodiment of the present invention,
3 is a perspective view showing a charging chute as a main part of a raw material charging apparatus according to an embodiment of the present invention,
4 is a configuration diagram illustrating a raw material charging apparatus according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It will be apparent to those skilled in the art that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know. Wherein like reference numerals refer to like elements throughout.

First, the present invention relates to a charging device for charging raw materials containing particles of various densities and sizes into a moving reservoir, and can be applied to charge raw materials separately according to density and size of particles in the reservoir. The raw material charged into the reservoir as described above can form a space between the raw material particles to improve air permeability. Hereinafter, the sintering raw material used to manufacture the sintered ores used in the sintering process will be described as an example of a sintering raw material charging device for charging the sintering vehicle.

FIG. 2 is a schematic view showing a raw material charging apparatus according to an embodiment of the present invention, and FIG. 3 is a perspective view showing a charging chute as a main part of a raw material charging apparatus according to an embodiment of the present invention.

As shown in the drawing, a raw material charging apparatus according to an embodiment of the present invention includes a raw material supply unit including a raw hopper 2 and a drum feeder 3, and a charging chute 100.

The raw material hopper 2 supplies the sintered raw material 1 containing the fine iron ores, the subsidiary raw material and the fine cokes to the drum feeder 3 via the hopper gate 4, and the drum feeder 3 is supplied The raw sintered raw material 1 is discharged to the charging chute 100.

The charging chute 100 forms an inclined surface so that the sintering raw material 1 of a large particle size is loaded in the lower portion of the sintered cart 8 and the small sintering raw material 1 is loaded in the upper portion of the sintering cart 8, And serves to classify the raw material for sinter (1) while promoting it. When the sintering raw material 1 is charged into the sintering bogie 8, the surface of the sintering raw material 1 is flattened by the surface puck plate 6 and then ignited in the ignition furnace 7, The sintering reaction is promoted by combustion of the coke contained in the raw material for sinter 1 by the air sucked downward to produce sintered ores.

The charging chute 100 is formed in a plate shape which is arranged obliquely. At this time, the charging chute 100 forms a curved surface having an area.

At this time, since the charging chute 100 is provided with a structure in which air is injected from the inside of the charging chute 100 to the upper surface thereof, an air film of a predetermined thickness is formed on the upper surface of the charging chute 100 by air injection.

3, the charging chute 100 is internally hollow, and a plurality of spray holes 101 are formed on the upper surface at uniform intervals. At least one supply pipe 110 for supplying air to the inside of the charging chute 100 is connected to the side surface of the charging chute 100.

At this time, the diameter of the spray hole 101 formed on the upper surface of the charging chute 100 is preferably 2 mm or less. The reason for this is that considering the particle size of the sintered raw material 1 loaded into the sintered bogie 8, the sintered raw material 1, which is classified into relatively small particles among the sintered raw materials blended, has an average diameter of 2 to 4 mm So as to prevent the sintering raw material 1 of relatively small particles from blocking the injection hole.

The injection pressure of the air injected through the injection hole 101 from the upper surface of the charging chute 100 is preferably adjusted to such a degree that the charging raw material 1 can be lifted slightly from the surface of the charging chute 100. An air film is formed between the sintering raw material 1 and the charging chute 100 as air is injected at an appropriate injection pressure from the upper surface of the charging chute 100 while the raw material 1 is being supplied to the charging chute 100 So that the distance between the sintering raw material 1 and the charging chute 100 is separated by the thickness of the air film to minimize the friction between the raw material sintering 1 and the charging chute 100.

As the friction between the sintering raw material 1 and the charging chute 100 is minimized, the charging speed of the raw material for sintering 1 is increased. As a result, the speed at which the raw material 1 is removed from the charging chute 100 is increased so that the raw material 1 having a large particle size is separated from the charging chute 100 by a relatively long distance, Can be separated from the charging chute 100 by a relatively short distance to induce vertical segregation according to the particle size of the sintering raw material 1 loaded on the sintering vehicle 8.

On the other hand, in order to increase the removal rate of the raw material for sinter 1, the charging chute 100 preferably has a curved cross-sectional shape. In particular, the shape of the curved line formed by the lateral cross-sectional shape of the charging chute 100 is preferably arranged as a curved surface of a cycloid curve or a prolate cycloid curve known as a shortest falling curve. Thus, the sintering raw material 1 moving along the moving path along the charging chute 100 is moved along the shortest falling curve, so that the horizontal leaving speed can be increased. Of course, the shape of the charging chute 100 is not limited to the embodiment shown, but may be implemented in various forms to increase the speed at which the raw material 1 is removed from the charging chute.

4, a raw material charging apparatus according to another embodiment of the present invention has the same configuration as that of the above-described embodiment, as shown in FIG. 4, and FIG. 4 is a configuration diagram showing a raw material charging apparatus according to another embodiment of the present invention. . However, the shape of the charging chute 100 is differently applied.

At this time, the charging chute 100 is made of a plate in the form of a flat plane. Thus, the charging chute 100 is formed in a plane in which the space in which the raw material for sinter 1 is moved is inclined. Air is sprayed through the spray hole 101 formed on the upper surface of the charging chute 100 so that an air film is formed between the sintering raw material 1 and the charging chute 100 so that the raw material for sinter 1 100, the speed at which the charging chute 100 is detached is increased.

However, it is preferable that the angle formed by the charging chute 100 and the inclined straight line, which is the transverse cross section, is less than 45 degrees with the ground. Thus, the horizontal release speed can be maintained faster than the vertical release speed of the raw material for sinter 1 deviating from the charging chute.

A method of charging a raw material into a sintering vehicle using the raw material charging apparatus according to an embodiment of the present invention will be described.

First, a raw material such as fine iron ore, limestone, and a fine coke as a fuel are mixed and then stored in the raw hopper 2.

Then, an air film is formed on the upper surface of the charging chute 100. The compressed air is supplied to the hollow interior of the charging chute 100 via the supply pipe 110 connected to the side of the charging chute 100. The compressed air thus supplied passes through the injection passage 102, An air film is formed on the upper surface of the charging chute 100 as it is sprayed onto the upper surface of the charging chute 100 through the holes 101.

In this state, the sintering raw material 1 is discharged from the raw hopper 2 through the drum feeder 3, and the discharged raw sintering raw material 1 is dropped into the charging chute 100 and moves along the charging chute 100 Sintered bogie. The sintered raw material 1 is lifted by a predetermined distance from the upper surface of the charging chute 100 by the air film formed on the upper surface of the charging chute 100 while being moved along the charging chute 100, Is minimized.

The sintering raw material 1 thus moved is separated from the charging chute 100 and the speed of separation is increased so that the sintering raw material 1 having a large particle size is separated from the charging chute 100 by a relatively long distance, The raw material 1 is separated from the charging chute 100 by a relatively short distance and the vertical segregation of the sintering raw material 1 loaded on the sintering vehicle 8 is induced by the particle size.

At this time, as the sintered bogie 8 moves in a direction opposite to the direction in which the raw material sinter 1 is disengaged from the charging chute, a large sintered raw material 1, which is separated by a relatively long distance, is loaded on the lower portion of the sintered bogie, The particles separated by a relatively short distance are loaded with the small sintering raw material 1 on the top.

Accordingly, the vertical segregation of the sintering raw material 1 charged into the sintering bogie 8 by the particle size and the density is induced, thereby ensuring the air permeability so that the sintering process can be performed smoothly.

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.

1: Sinter raw material 2: Raw material hopper
3: Drum feeder 4: Hopper gate
5: Suit 6: Surface pucker plate
7: By ignition 8: Sintered lorry
100: charging suit 101:
102: injection path 110: supply piping

Claims (10)

An apparatus for charging a raw material for sinter into a sintering vehicle,
A raw material supply unit for supplying a raw material for sinter,
And a plate-shaped charging chute disposed obliquely below the raw material supplying unit so as to charge the sintering raw material supplied from the raw material supplying unit with the sintering carriage,
Wherein the charging chute penetrates the upper surface from the inside and air is injected to form an air film on the upper surface of the charging chute.
The method according to claim 1,
Wherein the charging chute is hollow inside, a plurality of spray holes are formed on an upper surface thereof, and a supply pipe for supplying air to the inside is connected to the side surface.
The method of claim 2,
Wherein the injection path is formed in the upper surface of the charging chute so that air flows into the respective injection holes in the hollow interior.
The method according to claim 2 or 3,
Wherein the diameter of the spray hole formed on the upper surface of the charging chute is 2 mm or less.
The method according to any one of claims 1 to 3,
Wherein the charging chute is a curved plate.
The method of claim 5,
Wherein the charging chute is a plate having a curved surface in the form of a cycloid curve or a procella intercrocloidal curve.
The method according to any one of claims 1 to 3,
Wherein the charging chute is arranged such that a plate in the form of a plane is inclined.
A method for charging a raw material for sinter into a sintering vehicle,
Preparing a raw material for sinter;
Forming an air film on an upper surface of the charging chute;
Supplying the sintering raw material to a charging chute;
And transporting the sintering raw material supplied to the charging chute in a floating state in an air film formed on an upper surface of the charging chute to charge the sintering carrier.
The method of claim 5,
Wherein the air film forms an air film on the upper surface of the charging chute by passing air through the upper surface from the inside of the charging chute in the process of forming the air film on the charging chute.
The method of claim 8,
Wherein the sintered bogie moves in a direction opposite to a direction in which the raw material for sinter is separated from the charging chute in the course of charging the sintered bogie.
KR1020140129942A 2014-09-29 2014-09-29 Apparatus and method for charging raw material KR20160038117A (en)

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KR1020140129942A KR20160038117A (en) 2014-09-29 2014-09-29 Apparatus and method for charging raw material

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KR1020140129942A KR20160038117A (en) 2014-09-29 2014-09-29 Apparatus and method for charging raw material

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KR20160038117A true KR20160038117A (en) 2016-04-07

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