KR101427311B1 - Pellitizer - Google Patents

Abstract

The present invention relates to a pelletizer capable of uniformly assembling a size of a raw material of a steel such as pulverized coal.
A felicitator according to the present invention comprises a frame; A drum portion rotatably coupled to the frame and having a shape in which a plate extending along the edge of the disk is vertically protruded; A driving unit for rotating the drum unit; A raw material supply unit for supplying the raw material to the drum side; A binder supply unit having at least one nozzle and supplying the binder to the drum unit side; And a collecting and discharging unit for collecting and discharging the pellet mass assembled from the seasonal raw material.

Description

PELLITZER {PELLITIZER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pelletizer, and more particularly, to a pelletizer for pelletizing a raw material for a steel mill.

Generally, in blast furnace operation, the sinter ore and coke are charged from the upper part of the blast furnace, and the hot air blown from the hot blast furnace under the blast furnace is blown into the blast furnace to produce the molten iron due to the reduction and melting reaction of the iron ore. Such blast furnace operation can reduce the gas flow inside the blast furnace, that is, the entire airflow of the blast furnace is reduced and melted, so that the blast furnace can be operated economically and the productivity is high and the service life of the blast furnace is extended.

However, recently, in order to economically operate the blast furnace, there is a problem that the air permeability inside the blast furnace deteriorates, gradually increasing the use ratio of the relatively inexpensive pulverized coal instead of the expensive coke. In other words, although there is a positive effect of securing the competitiveness of the blast furnace due to the increase of the pulverized coal blast ratio in the blast furnace, the percentage of pulverized coal having a small particle size to be charged is high, and thus the coke layer, which is the passage through which the reducing gas in the blast furnace flows, will be.

In the sintering process of steel mills, raw materials used for sintering include raw materials such as limestone, limestone with a smaller grain size, CaO-containing raw materials such as burnt lime, SiO2-containing raw materials such as silica and serpentine, and solid fuels such as coke and anthracite do. The blend ratio of these raw materials is determined in consideration of the quality and composition of the sintered ores. After the compounding ratio is determined, an appropriate amount of water is added to each raw material in a pelletizer according to the compounding ratio, and the particles are gradually grown while the raw material flows, thereby assembling. However, when the size of the sintered ores is not constant and a small amount of sintered ores are generated, the air permeability inside the blast furnace may be deteriorated.

When the air permeability inside the blast furnace deteriorates, instability of the blast furnace (hereinafter referred to as "blast furnace") is caused, resulting in a decrease in production and various instability of operation, and in some cases, a large accident may occur.

A pellet obtained by assembling raw materials such as fine coal and sintered ores is called pellets. The pellets are compacted into spheres in small amounts by the surface tension of water supplied with the appropriate amount of water. The apparatus for producing such pellets is called pelletizer.

FIG. 1 is a perspective view of a conventional pelletizer, in which a cylindrical drum 10 with a closed bottom is inclined at a predetermined angle, and is rotated about a central axis by a driving motor. A fresh water supply unit 20, in which a plurality of nozzles are formed, is located in the upper portion of the drum 10 to supply fresh water into the drum 10. A raw material charging unit 30 is disposed on the drum 10 to supply raw materials such as pulverized coal to the inside of the drum 10. When the raw material is supplied into the rotating drum 10 and the fresh water is supplied by the fresh water supply unit 30, the raw materials are assembled by the surface tension of moisture as described above to form the pellets. The assembled pellet overflows the drum 10, and the hopper 40 is positioned below the drum 10 to collect the pellets discharged from the drum 10.

In the case of using pellets with uneven granularity during the seasoning process, the air permeability inside the blast furnace may be deteriorated, which may result in unstable conditions in the blast furnace, lower product yields, and various instability of operation. In some cases, It is important to make the pellets uniform in size.

However, conventional pelletizers can cause pellet agglomerates of unexpected size to be produced in the process of producing the pellets, and these giant pellet agglomerates remain without being crushed and hinder the smooth production of the pellets. Therefore, the particle size of the pellets to be produced is different, resulting in poor particle size and low productivity.

In addition, when the pulverized coal is mixed with the binder in the pelletization process, the pulverized coal becomes clogged with the drum, resulting in poor particle size and low productivity.

Further, according to the requirements, the particle size of the iron raw material such as pulverized coal may have to be adjusted. However, the conventional pelletizer has a disadvantage that there is no means for controlling the particle size of the produced pellet.

An object of the present invention is to provide a pelletizer which can uniformly assemble the size of pellets.

It is another object of the present invention to provide a pelletizer capable of improving productivity.

Another object of the present invention is to provide a pelletizer capable of easily controlling the size of the pellet.

A felicitator according to the present invention comprises a frame; A drum portion rotatably coupled to the frame and having a shape in which a plate extending along the edge of the disk is vertically protruded; A driving unit for rotating the drum unit; A raw material supply unit for supplying the raw material to the drum plate side; A binder supply unit having at least one nozzle and supplying the binder to the drum unit side; And a collecting and discharging unit for collecting and discharging the pellet mass assembled from the seasonal raw material.

Preferably, the collecting and discharging portion includes a collecting portion capable of collecting the pellet mass; A discharge portion capable of transporting and discharging the pellet mass; And a transfer unit coupled to the collecting unit and capable of transferring the collecting unit to the discharging unit.

Preferably, the conveying portion includes a conveying beam having a rod shape and having both ends supported by the supporting portion and located on the upper side of the drum portion; And a transfer device coupled to the transfer beam, the transfer device being coupled to the transfer beam so as to be able to move along the transfer beam, the transfer device being capable of being automatically moved by an internal drive device, wherein the one end is disposed at one side of the transfer part Wherein the collecting part has a collecting rake coupled to the conveying device so that the collecting part can be moved up and down, and the conveying device moves onto the conveyor belt along the conveying beam, The pellet mass can be transferred to the conveyor belt.

Preferably, the conveying portion includes a conveying beam having a rod shape and having both ends supported by the supporting portion and located on the upper side of the drum portion; And a transfer device coupled to the transfer beam, the transfer device being coupled to the transfer beam so as to be able to move along the transfer beam, the transfer device being capable of being automatically moved by an internal drive device, wherein the one end is disposed at one side of the transfer part Wherein the collecting unit has a collecting net that is coupled to the conveying unit so that the collecting unit can be moved up and down, and the conveying unit moves onto the conveying belt along the conveying beam, The pellet mass can be transferred to the conveyor belt.

Preferably, the conveying portion includes a conveying beam having a rod shape and having both ends supported by the supporting portion and located on the upper side of the drum portion; And a transfer device coupled to the transfer beam, the transfer device being coupled to the transfer beam so as to be able to move along the transfer beam, the transfer device being capable of being automatically moved by an internal drive device, wherein the one end is disposed at one side of the transfer part Wherein the collecting part has a robot arm coupled to the conveying device so as to be movable up and down and a robot hand coupled to the robot arm, the conveying device being arranged on the conveyor belt along the conveying beam The pellet mass transferred to the robot hand can be transferred to the conveyor belt.

Preferably, the trapping portion is adjustable in angle.

Preferably, the apparatus may further include a blade having a plate shape and having one end abutted against the drum plate.

Preferably, the apparatus further comprises a rotating means for adjusting the rotation angle of the blade, the rotating means being connected to the blade at one side, through the center of the drum plate, and rotatably coupled to the frame A rotating shaft; And a fixing part for fixing or releasing the rotation axis at an arbitrary angle.

Preferably, the blade may have an angle of 45 [deg.] To 90 [deg.] In the vertical direction and in the clockwise direction in the horizontal direction.

Preferably, a removal plate having a plate shape and having one end abutted against the blade is formed, and a removal unit reciprocating along the blade may be further included.

The pelletizer according to the present invention can uniformly assemble the size of the pellets and can easily adjust the size of the pellets to be assembled, thereby improving productivity and producing high quality pellets.

1 is a perspective view of a conventional pelletizer,
2 is a configuration diagram of a pelletizer according to an embodiment of the present invention;
FIGS. 3A and 3B are diagrams illustrating a collecting rake of a pelletizer according to an embodiment of the present invention;
Figures 4A and 4B show a blade of a pelletizer according to another embodiment of the present invention,
5 is a view illustrating a removing unit of a pelletizer according to another embodiment of the present invention,
6 is a view showing a trapping portion of a pelletizer according to another embodiment of the present invention, and Fig.
7 is a view showing a trapping part of a pelletizer according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the particular embodiments, It is to be understood that the invention includes all modifications, equivalents, and alternatives falling within the scope. It should also be understood that various equivalents and modifications may be substituted for those at the time of the present application.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

In the following description of the present invention with reference to the accompanying drawings, the same components are denoted by the same reference numerals regardless of the reference numerals, and redundant explanations thereof will be omitted. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

FIG. 2 is a structural view of a pelletizer according to an embodiment of the present invention, and FIGS. 3A and 3B are views showing a collecting rake of a pelletizer according to an embodiment of the present invention.

The pelletizer according to an embodiment of the present invention includes a drum unit 100, a collecting and discharging unit, and a driving unit (not shown).

The drum unit 100 has a circular plate shape and a shape in which a plate continuous along the edge of the circular plate having a center axis at the center of the rear side is vertically protruded. The drum portion 100 is arranged to incline from the ground with a predetermined angle, and the central axis of the drum portion 100 is rotatably coupled to the frame 600. [ The driving unit includes a motor and a deceleration unit, and the center shaft is rotated by the driving unit to rotate the drum unit 100.

The collecting and discharging portion includes a collecting portion, a conveying portion, and a discharging portion. The collecting part includes a collecting rake 810, and the collecting rake 810 has a shape in which a plurality of pawls are fixedly arranged in a row.

The conveying unit includes a conveying beam 821 and a conveying unit 820. The conveying beam 821 has a rod shape and both ends thereof are supported by the support unit and positioned above the drum unit 100. [ The transfer device 820 is coupled to the transfer beam 821 and is coupled to move along the transfer beam 821 and can be automatically moved by the internal drive device. The collecting rake 810 is coupled to the moving device, which is coupled to be able to move up and down and adjust the angle by the driving device.

The discharge portion includes a conveyor belt 830, and one end of the conveyor belt 830 is disposed at one side of the conveyance portion.

Although not shown, a binder supply portion is located above the drum portion 100. The binder supply portion includes a plurality of nozzles, and the binder supplied from the hose connected to the nozzle is sprayed to the drum portion 100 through the nozzle, which may be a fresh water or a binding binder or the like. The raw material supply unit 400 is located above the drum unit 100 and supplies the raw material to the inside of the drum unit 100.

The hopper (not shown) is disposed below the drum unit 100, and the pellets discharged from the drum unit 100 can be collected in the hopper. Although not shown, It is possible to easily adjust the angle of the drum unit 100.

The operation of the pelletizer according to the present invention will be described below as a case of using pulverized coal as one of the raw materials for the steel making.

The drum unit 100 is rotated counterclockwise by a driving unit, fresh water is supplied through a nozzle of a binder supply unit, and pulverized coal is introduced into the drum unit 100 through a raw material supply unit 400. The pulverized coal introduced into the drum unit 100 moves along the rotating direction of the drum unit 100 and is mixed with fresh water, and is assembled into pellets with a predetermined particle size, and the produced pellets are discharged to the hopper.

At this time, giant pellet agglomerates that are assembled beyond unintended size can be generated. The transfer device 820 moves along the transfer beam 821 to the position where the giant pellets are located, and the collecting rake 810 descends to collect them. The collecting rake 810 which collects these collects is lifted and the conveying device 820 moves along the conveying beam 821 onto the conveyor belt 830. When the collecting rake 810 is positioned on the conveyor belt 830, the collecting rake 810 is inclined and the giant pellet falls to the conveyor belt 830 and is discharged to the outside by driving the conveyor belt 830. On the other hand, since the size of the giant pellet mass captured by the distance between the neighboring claws can be varied, it is possible to select the pellet mass to be collected by adjusting the mass.

4A and 4B are views showing blades of a pelletizer according to another embodiment of the present invention.

A blade 200 is provided inside the drum unit 100. The blade 200 has a plate shape and is arranged standing upright from the center of the drum unit 100. [ The blade 200 is fixed to the center portion of the drum portion 100 and fixed to the fixed shaft 210 passing through the center axis of the drum portion 100. The fixed shaft 210 is fixed irrespective of the rotation of the drum 100 so that the blade 200 is fixedly positioned inside the drum 100 while the drum 100 rotates. The blade 200 blocks the raw material moved to the upper side of the drum unit 100 by the rotation of the drum unit 100 and moves the lowered material to the lower side of the drum unit 100.

The blade 200 can be angularly changed by the fixed shaft 210 and can be fixed by fixing means (not shown) to adjust the placement angle. At this time, depending on the arrangement angle of the blade 200, The size can be adjusted. Referring to FIG. 4B, the larger the angle? With respect to the horizontal line, the smaller the particle size of the produced pellet. That is, for example, the particle size of the pellet to be assembled when the angle α is 45 ° is larger than the particle size of the pellet to be assembled when the angle α is 90 °. The particle size of the produced pellets can be adjusted according to the amount of fresh water supplied, the rotating speed of the drum 100, and the inclination angle of the drum 100, but according to the present invention, The particle size of the pellet can be adjusted simply and easily. The angle alpha of the blade 200 may be adjusted to any angle as required, but according to one embodiment of the present invention, the angle alpha of the blade 200 is preferably between 45 and 90 degrees, This is because, in the case of the raw material, the particle size adjusting effect is large in the above angle range.

The pulverized coal moving along the rotating direction of the drum portion 100 is blocked by the blade 200 and moved downward along the blade 200 to the lower side of the drum portion 100. [ At this time, the angle of the blade 200 can be adjusted according to the required pellet size, and the produced pellets are discharged to the hopper.

5 is a view showing a removal unit of a pelletizer according to another embodiment of the present invention. In the process of manufacturing pellets, the pulverized coal is mixed with the water provided at the upper part to progress the particle size. Since the pulverized coal contains moisture during the particle size increasing process, the pulverized coal tends to be entangled with the blade 200. In this case, the pellet is not smoothly produced due to the coagulated powder, and the pellet production efficiency may be reduced due to difficulty in forming a uniform particle size. The removing unit 300 includes a plate-shaped removing plate 310 formed at an end of the removing plate 310. The removing plate 310 reciprocates along the blade 200 in contact with one surface of the blade 200, ) Can be removed immediately. At this time, the removal unit 300 may be moved by an operation unit (not shown).

6 is a view showing a collecting part of a pelletizer according to another embodiment of the present invention. Instead of the collecting rake 810, a collecting net 840 can be used to collect the pellets, and the distance between adjacent lines That is, a pellet mass of a specific size or more can be collected depending on the size of the mesh.

7 is a view showing a collecting part of a pelletizer according to another embodiment of the present invention. The collecting part includes a robot arm 850 provided with a robot hand 851, and collects a specific pellet mass by controlling it can do.

When pellets having uneven particle sizes are used during the seasoning process, the air permeability inside the blast furnace may be deteriorated and the situation in the blast furnace may become unstable, the production of the product may be decreased, various operations may be unstable, and in some cases, It is important to make the pellets uniform in size.

According to the general pelletizer, when the pulverized coal is mixed with the binder, sticking occurs and unexpectedly large pellets may be formed. These large pellet clusters remain unfractured and interfere with the proper manufacture of the pellets . Therefore, the particle size of the pellets to be produced is different, resulting in poor particle size and low productivity.

In addition, when the pulverized coal is mixed with the binder in the pelletization process, the pulverized coal becomes clogged with the drum, resulting in poor particle size and low productivity.

In addition, there is a case where the grain size of the iron raw material such as pulverized coal is adjusted according to the necessity of the blast furnace condition and the like, and the conventional pelletizer has a disadvantage that there is no means for controlling the particle size of the produced pellet.

However, in the present invention, the size of the pellets can be uniformly assembled, productivity can be improved, and the size of the pellets can be easily adjusted.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Various modifications and variations are possible within the scope of the appended claims.

100: drum portion 200: blade
210: stationary shaft 300: removal
310: removal plate 400: raw material supply part
600: Frame 810:
820: Feeding device 821: Feeding beam
830: Conveyor belt 840:
850: Robot arm 851: Robot hand

Claims (10)

frame;
A drum portion rotatably coupled to the frame and having a shape in which a plate extending along the edge of the disk is vertically protruded;
A driving unit for rotating the drum unit;
A raw material supply unit for supplying the raw material to the drum side;
A binder supply unit having at least one nozzle and supplying the binder to the drum unit side; And
And a collecting and discharging portion for collecting and discharging the pellet mass assembled from the above-
Wherein the collecting and discharging portion includes:
A collecting part capable of collecting the pellet mass;
A discharge portion capable of transporting and discharging the pellet mass; And
Wherein the collecting part is coupled to the collecting part,
. ≪ / RTI > delete The method according to claim 1,
Wherein the conveying portion includes a conveying beam having a rod shape and having both ends supported by the supporting portion and located on the upper side of the drum portion; And a transfer device coupled to the transfer beam, the transfer device being coupled to the transfer beam so as to be movable along the transfer beam and being automatically movable by an internal drive device,
Wherein the discharging portion includes a conveyor belt having one end disposed on one side of the conveying portion,
Wherein the collecting part has a collecting rake coupled to the conveying device so that the collecting part can be moved up and down, and the conveying device moves on the conveying belt along the conveying beam to convey the pellet mass captured by the collecting rake to the conveyor belt Wherein the pelletizer is capable of transporting the pelletizer. The method according to claim 1,
Wherein the conveying portion includes a conveying beam having a rod shape and having both ends supported by the supporting portion and located on the upper side of the drum portion; And a transfer device coupled to the transfer beam, the transfer device being coupled to the transfer beam so as to be movable along the transfer beam and being automatically movable by an internal drive device,
Wherein the discharging portion includes a conveyor belt having one end disposed on one side of the conveying portion,
Wherein the collecting unit has a collecting net that is coupled to the conveying unit so that the collecting unit can be moved up and down, the conveying unit moves onto the conveyor belt along the conveying beam to collect the pellet mass collected in the collecting net, Wherein the pelletizer is capable of transporting the pelletizer. The method according to claim 1,
Wherein the conveying portion includes a conveying beam having a rod shape and having both ends supported by the supporting portion and located on the upper side of the drum portion; And a transfer device coupled to the transfer beam, the transfer device being coupled to the transfer beam so as to be movable along the transfer beam and being automatically movable by an internal drive device,
Wherein the discharging portion includes a conveyor belt having one end disposed on one side of the conveying portion,
Wherein the collecting portion has a robot arm coupled to the conveying device so as to be movable up and down and a robot hand coupled to the robot arm, the conveying device moves on the conveyor belt along the conveying beam, Wherein the pellet block is capable of transferring the pellet mass to the conveyor belt. 6. The method according to any one of claims 3 to 5,
Wherein the collecting part is adjustable in angle. The method according to claim 1,
A blade having a plate shape and having one end abutted against an original plate of the drum portion
Further comprising a pelletizer. 8. The method of claim 7,
A rotating means for adjusting a rotating angle of the blades
Wherein the rotating means comprises:
A rotating shaft coupled to one end of the blade and penetrating the center of the disk of the drum portion and rotatably coupled to the frame; And
And a fixing portion
. ≪ / RTI > 9. The method of claim 8,
Wherein the blade has a vertical direction in the horizontal direction and an angle of 45 to 90 degrees in the clockwise direction. 8. The method of claim 7,
A removing plate having a plate shape and disposed so as to abut one end of the blade,
Wherein the pelletizer further comprises:

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