WO2016047929A1

WO2016047929A1 - Raw material charging device and charging method

Info

Publication number: WO2016047929A1
Application number: PCT/KR2015/008946
Authority: WO
Inventors: 정해권; 조병국; 최만수; 박종인; 정은호
Original assignee: 주식회사 포스코
Priority date: 2014-09-25
Filing date: 2015-08-26
Publication date: 2016-03-31
Also published as: CN106715728A; JP2017535739A; KR20160036734A; CN106715728B; JP6446541B2; KR101622294B1

Abstract

The present invention relates to a raw material charging device and a charging method and, more particularly, to a raw material charging device and a charging method, which can successively stack raw materials on a sintering truck in the descending order of particle size, thereby improving the air permeability of the raw materials. A raw material charging device according to an embodiment of the present invention comprises: a raw material supply unit for discharging charged raw materials; a storage unit spaced from the raw material supply unit and configured to store the raw materials discharged from the raw material supply unit; and a charging chute forming a transfer path between the raw material supply unit and the storage unit and having a vibration surface formed such that the dimensionless acceleration (a) of the raw materials, which move on the transfer path, have a value of 8 or larger.

Description

Raw material charging device and charging method

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a raw material charging device and a charging method, and more particularly, to a raw material charging device and a charging method for charging a raw material into a sintered trolley.

In general, in the sintering step, a sintered raw material is charged into a sintering cart of a sintering machine using a charging device to manufacture sintered light.

1 shows a general sintering raw material charging device. The sintered raw material charging device includes a sintered raw material hopper 2 in which a sintered raw material 1 containing fine powders such as fine iron ore and limestone and fine coke as fuel is stored, and the sintered raw material hopper 2 is rotated by rotating the sintered raw material. To a charging chute 5 which charges the raw material supply part consisting of the drum feeder 3 supplied downward through the gate 4, and the supplied sintering raw material 1 onto the floor light first laid on the sintering cart 8. Consists of. The charging chute 5 is made of an inclined plate and serves to classify the sintered raw material 1 so that small particles are placed at the top of the sintered trolley 8 and large particles are charged at the bottom thereof.

When the sintered raw material 1 is charged into the sintered bogie 8, the sintering machine evenly ignites the sintering furnace 7 with the surface of the sintered raw material 1 by the surface pulp plate 6 and into a suction blower (not shown). The coke contained in the sintering raw material 1 is burned by the air drawn in the lower part by the air phase by this, and a sintering reaction is advanced and a sintered light is manufactured.

In such a sintering step, it is necessary to vertically segregate the charged state of the raw material in the sintered trolley so that large particles are located in the lower part and small particles in the upper part, and artificially encourage the coke which is the fuel to be large in the upper part. When the vertical segregation is effectively promoted in this way, the calorie unbalance phenomenon in the up and down direction of the sintering machine is suppressed, while the resistance (air resistance) of the air flowing into the raw material layer in the sintering machine is lowered to improve the productivity of the sintered light.

However, when the segregation degree of the raw material in the sintered trolley is lowered, the resistance (airflow resistance) of the air flowing into the raw material layer in the sintering machine becomes high, resulting in poor air permeability. That is, when the sintered raw material having a small particle size is loaded in the lower part of the sintered trolley during the charging process, the ventilation space between the sintered raw materials of the small grains becomes small, so that the ventilation is weak. Therefore, intake through the suction blower becomes difficult, which causes a large amount of unsintered light due to differential pressure generation or poor sintering state. This problem has a significant impact on the quality and productivity of the sintered light.

The present invention provides a raw material charging device and a charging method that can improve the air permeability of the raw material by sequentially stacking the raw material by particle size in order from having a large particle size to a small particle size on the sintered trolley.

The present invention also provides a raw material charging device and a charging method capable of improving the quality and productivity of the sintered light to be produced.

Raw material charging apparatus according to an embodiment of the present invention, the raw material supply for discharging the charged raw material; A reservoir spaced apart from the raw material supply unit and storing the raw material discharged from the raw material supply unit; And a charging chute forming a transfer path between the raw material supply part and the reservoir, and having a vibration surface formed such that the dimensionless acceleration a of the raw material moving on the transfer path has a value of 8 or more.

The conveying path is formed to be inclined downward from the raw material supply part to the reservoir, and the vibrating surface includes a convex part in which a height change is periodically formed along the conveying path, and the dimensionless acceleration (a) value is the highest height of the convex part. (H), the inclination angle (θ) of the transfer path and the wavelength of the convex portion (λ) can be determined by controlling the size.

The charging chute may include an integral type or a plurality of divided inclined plates, and the convex portion may include a surface formed by a plurality of protrusions protruding along an upper surface of the inclined plate.

The charging chute may include a plurality of rollers, and the convex portion may include a surface in which the rollers are arranged side by side and formed along the surface of each roller.

The dimensionless acceleration (a) is the following equation 1, the proportional relationship between the amplitude (A) and the highest height (h) of the convex portion, the proportional relationship between the vibration frequency (f) and the inclination angle (θ) of the conveying path and vibration It can be calculated from the inverse relationship between the frequency f and the wavelength? Of the convex portion.

[Equation 1]

(Where f is vibration frequency, A is amplitude, and g is gravitational acceleration.)

The transfer path of the charging chute may be formed as a straight or curved trajectory.

The inclination angle θ may decrease from the top to the bottom of the charging path of the charging chute.

The conveying path may have an inclination angle θ of 40 ° to 50 °.

The roller may have a diameter D of 150 mm or less.

In addition, the raw material charging method according to an embodiment of the present invention, the process of preparing a raw material; Supplying the raw material to a charging chute forming a transfer path of the raw material; The raw material is transferred to the feed path by controlling at least one of the highest height H of the convex portion formed on the vibration surface of the charging chute, the height of which is periodically changed, the inclination angle of the conveying path, and the wavelength? Of the convex portion. Vibrating in a phase and sequentially laminating and transferring from having a small particle size to having a large particle size; And charging the transferred raw material into a reservoir.

In addition, the raw material supplied to the charging chute may vibrate in a vertical direction or a direction perpendicular to the transfer path.

The conveying path may be formed as a straight or curved trajectory.

At least one of the highest height H of the convex portion, the inclination angle θ, and the wavelength? Of the convex portion may be controlled such that the dimensionless acceleration a of the raw material moving on the conveying path has a value of 8 or more.

In the process of charging in the reservoir, the raw material may be sequentially stacked and charged from having a large particle size to having a small particle size.

The raw material is a sintered blended raw material in which fine coke, which is a subsidiary material or fuel, is blended, and the reservoir may be a sintered truck.

According to the raw material charging device and the charging method according to an embodiment of the present invention, by forming a vibrating surface in the charging chute to vibrate the raw material during transfer to sequentially stack and transfer the raw material having a small particle size from the having a small particle size on the charging chute can do.

Thereby, the raw material charged in a sintered trolley | bogie can be laminated | stacked sequentially from having a large particle size to having a small particle size, and the vertical segregation degree in a sintering compounding raw material layer can be improved. In addition, by improving the vertical segregation of the raw material, it is possible to suppress the calorie imbalance in the up and down direction of the sintering machine, and to lower the resistance of the air flowing into the raw material layer in the sintering machine to improve the air permeability. The quality and productivity of the sintered light produced in the process can be improved.

In addition, according to the raw material charging device and charging method according to an embodiment of the present invention there is also an effect that can significantly improve the segregation in the vertical direction of the blended raw material charged to the sintered trolley without significantly changing the manufacturing equipment.

1 schematically shows a typical sintering raw material charging device.

2 is a view for explaining the brazil nut effect applied to the present invention.

3 is a view schematically showing a raw material charging device according to an embodiment of the present invention.

4 is a view showing a charging chute according to an embodiment of the present invention.

5 is a view showing a charging chute in which a transfer path is formed as a trajectory of a curve according to an exemplary embodiment of the present invention.

6 is a view schematically showing a raw material charging apparatus according to another embodiment of the present invention.

7 is a view showing a charging chute according to another embodiment of the present invention.

8 is a view showing a charging chute in which a transfer path is formed as a trajectory of a curve according to another embodiment of the present invention.

9 is a graph showing a change in the dimensionless acceleration value with respect to the diameter of the roller included in the charging chute according to another embodiment of the present invention.

10 is a flowchart illustrating a raw material charging method according to an embodiment of the present invention.

The raw material charging device and the charging method according to the present invention propose a technical feature that can improve the air permeability of the raw material by sequentially stacking the raw material by particle size in order from having a large particle size to having a small particle size on the sintered trolley.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various forms, and only the embodiments of the present invention make the disclosure of the present invention complete and the scope of the invention to those skilled in the art. It is provided to inform you completely. Like numbers refer to like elements in the figures.

The present invention relates to a raw material charging apparatus and a charging method for charging a raw material containing particles having various densities and sizes into a moving reservoir, and may be applied to separate and load the raw materials by the size of the particles in the reservoir. In this way, the raw material charged in the reservoir can improve the air permeability by forming a space between the raw material particles.

Hereinafter, the sintering raw material charging apparatus and charging method which charge the sintering mixing raw material used to manufacture the sintered light used in a steelmaking process to the moving sintering truck are demonstrated as an example. However, the present invention is not limited to the sintering process, and of course, the present invention can be applied to all processes requiring vertical segregation of raw materials composed of particles such as blast furnace and coke.

The Brazil Nut Effect (BNE) is a name given to the fact that when you buy a peanut mix can that contains different types of peanuts and open the lid, the largest Brazilian peanut is always on top. When shaking and mixing mixed grain matter, the largest object eventually floats on the surface.

That is, when the mixture having particles of various sizes is vibrated in the vertical direction, particles having a large particle size rise in the surface layer direction, and particles having a small particle size are filled in an empty space generated by the rise of particles having a large particle size. Moving downward, segregation in the vertical direction occurs.

The Brazil nut effect (BNE) as described above is mainly used to separate particles of different sizes in the chemical field, but in the present invention, a small particle size due to vibration on a charging chute transferring raw materials using the Brazil nut effect (BNE). The raw materials are sequentially laminated and transported from those having a large particle size to those having a large particle size. Details of applying the Brazil nut effect (BNE) to the raw material charging device and the charging method of the present invention will be described in detail according to each embodiment below.

3 is a view schematically showing a raw material charging device according to an embodiment of the present invention, Figure 4 is a view showing a charging chute according to an embodiment of the present invention. 3 and 4, the raw material charging device according to an embodiment of the present invention is a raw material supply for discharging the charged raw material 10; A reservoir spaced apart from the raw material supply unit and storing the raw material 10 discharged from the raw material supply unit; And a charging chute 50 having a vibrating surface which forms a transfer path between the raw material supply part and the reservoir and is formed such that the dimensionless acceleration a of the raw material 10 moving on the transfer path has a value of 8 or more. It includes;

The raw material supply unit may include a raw material hopper 20 and a drum feeder 30. The raw material hopper 20 supplies the blending raw material 10 such as fine iron ore, secondary raw material and fine coke to the drum feeder 30 via the hopper gate 40, and the drum feeder 30 is rotated and blended therein. The raw material 10 is mixed and sent out to the charging chute 50. In FIG. 3, the raw material supply unit including the raw material hopper 20 and the drum feeder 30 is illustrated. However, the raw material supply unit of the present invention is not limited to the above configuration, and the raw material 10 is discharged to charge the charging chute ( Of course, it includes a raw material supply of various configurations to supply to 50).

The charging chute 50 forms a transfer path between the raw material supply unit and the reservoir to transfer the raw material 10 supplied from the raw material supply unit to a reservoir such as the sintered bogie 80 along the transfer path. When the raw material 10 is charged into the sintered trolley 80, the surface of the raw material 10 is evenly squeezed by the surface pulp plate 60, and then ignited in the ignition furnace 70, from the wind to the bottom by the suction blower (not shown). The sintered reaction is advanced by combustion of coke contained in the raw material 10 by the air which is drawn in, and a sintered light is manufactured.

The charging chute 50 has a vibrating surface for vibrating the raw material 10 moving on the transfer path to generate a brazil nut effect (BNE) and for feeding along the transfer path. The transfer path may be formed to be inclined downward from the raw material supply unit to the reservoir, and the vibrating surface may include a convex portion 52 in which a height change is periodically formed along the transfer path.

In addition, the charging chute 50 may include an integral inclined plate or may include a plurality of divided inclined plates disposed along a conveying path, in which case the convex portion 52 is illustrated in FIGS. 3 and 4. And a surface formed by a plurality of protrusions protruding along the upper surface of the one-piece or the plurality of divided ramps.

More specifically, the convex portion 52 forms a vibrating surface by a plurality of protrusions protruding along the upper surface of the integral or split inclined plate. Therefore, the charging chute 50 vibrates the raw material 10 in a direction perpendicular to the transfer path by a plurality of protrusions protruding along the upper surface during the transfer of the raw material 10, and by such vibration 10) are from one having a small particle size to one having a large particle size, sequentially stacked and transported on the charging chute 50.

Equation 1 shows a value of the dimensionless acceleration (a) of the particles for generating the Brazil nut effect (BNE). In Equation 1, when the vibration frequency (f) and the amplitude (A) are determined such that the dimensionless acceleration (a) value is 8 or more, a large particle size is obtained regardless of the density or size ratio of particles having various sizes constituting the mixture. The Brazil nut effect (BNE) occurs in which the particles having the particles rise in the surface layer direction and the particles having the small particle sizes fall downward.

On the other hand, if the value of the dimensionless acceleration (a) in Equation 1 is less than 8, the reverse Brazil Nut Effect (RBNE) occurs. Inverse segregation, the Brazilian Nut Effect (RBNE) means that particles with a large particle size are arranged below, and particles with a small particle size are arranged in the surface layer. Thus, when such reverse segregation of Brazilian nut effect (RBNE) occurs on the charging chute 50 from the raw material 10 having a large particle size in the sintered bogie 80 moving in the direction opposite to the direction in which the raw material 10 is discharged. There is a problem that it is difficult to stack and load with the raw material 10 having a small particle size and the air permeability is lowered.

Therefore, the vibration frequency f and the amplitude A of the vibration surface formed on the upper surface 52 of the charging chute 50 according to the embodiment of the present invention have a dimensionless acceleration (a) value of 8 in Equation 1 above. Should be determined to be ideal.

The amplitude A has a relationship proportional to the maximum height H of the convex portion 52 formed on the vibration surface. In addition, since the moving speed of the raw material 10 increases as the inclination angle θ of the transport path increases, the vibration frequency f is proportional to the inclination angle θ of the transport path, and the wavelength λ of the convex portion 52. Has an inverse relationship. Here, the length of the charging chute 50 may be increased to increase the moving speed of the raw material 10, but this is not appropriate in terms of manufacturing and control, and economics because the size of the equipment should be excessively increased.

Therefore, the dimensionless acceleration (a) value of the raw material moving on the conveyance path is the highest height (H) of the convex portion (52), the inclination angle (θ) of the conveyance path and the wavelength (λ) of the convex portion (52). Can be determined by controlling the size of the That is, the dimensionless acceleration (a) is a proportional relationship between the equation (1), the amplitude (A) and the highest height (H) of the convex portion (52), the vibration frequency (f) and the inclination angle (θ) of the feed path It can be calculated from the proportional relationship of) and the inverse relationship between the vibration frequency (f) and the wavelength (λ) of the convex portion (52). Therefore, at least one of the highest height H, the inclination angle θ, and the wavelength λ of the convex portion formed on the vibrating surface of the charging chute 50 such that the dimensionless acceleration a has a value of 8 or more. By controlling the, by vibrating the raw material 10 on the transfer path it can be transported by sequentially stacking from having a small particle size to having a large particle size.

In FIGS. 3 and 4, a plurality of protrusions protrude in a direction perpendicular to the transport path along the upper surface of the integrated or split inclined plate to vibrate the raw material 10. However, the vibration direction of the raw material 10 is It is not limited to this. For example, it is a matter of course that the charging chute 50 having various shapes for generating the Brazil nut effect (BNE) may be applied by vibrating the raw material 10 so as to have the same vibration in the vertical direction as the gravity direction.

5 is a diagram illustrating a charging chute in which a transfer path is formed as a trajectory of a curve according to an exemplary embodiment of the present invention. As shown in FIG. 5, the charging chute according to the embodiment of the present invention may be formed as a trajectory of a curve, and the transfer path of the charging chute may be formed such that the inclination angle θ decreases from top to bottom.

As described above, when the raw material 10 is stacked on the charging chute 50 from having a small particle size to having a large particle size, the sintering bogie 80 in the process of charging the raw material 10 to the sintered bogie 80. Is moved in the direction opposite to the horizontal component in the direction in which the raw material 10 is separated. In this case, the falling distance of the raw material 10 having a large particle size increases according to the William's Trajectory Effect, so that the sintered trolley 80 accumulates from the raw material 10 having a large particle size and then moves upwards. Raw material 10 having a small particle size is accumulated. As a result, it can be seen that increasing the horizontal component in the moving direction of the raw material 10 falling apart from the lower part of the charging chute 50 is effective for segregation charging into the sintered trolley 80.

Therefore, the inclination angle [theta] may be reduced as the transfer path of the charging chute 50 goes from the upper part to the lower part. That is, in the upper part of the charging chute 50, since the raw material 10 discharged from the raw material supply part with the vibration frequency f increases, it has a big particle size from having a small particle size on the charging chute 50 by Brazilian nut effect BNE. In the sintered blended raw material layer in the sintered bogie 80 in accordance with William's trajectory effect by increasing the horizontal component in the moving direction of the raw material 10 to be separated from the lower portion of the charging chute 50, and sequentially transported to Segregation can be increased. In addition, the higher the segregation degree, the more the space is secured between the particles, so the air permeability is improved, and thus the productivity of the sintered light can be greatly increased.

6 is a view schematically showing a raw material charging device according to another embodiment of the present invention, Figure 7 is a view showing a charging chute according to another embodiment of the present invention. 6 and 7, the charging chute 50 of the raw material charging device according to another embodiment of the present invention includes a plurality of rollers 54, the rollers 54 are arranged side by side to each roller ( A convex portion 52 is formed along the surface of 54.

More specifically, the charging chute 50 of the raw material charging device according to another embodiment of the present invention is a convex portion whose height is periodically changed along the transport path by the upper surface of the plurality of rollers 52 arranged side by side To form 52. That is, the conveyance path of the raw material 10 moving along the upper surfaces of the plurality of rollers 54 is accompanied by vibration by the surface bending of the rollers 54. Therefore, the charging chute 50 causes the raw material 10 to vibrate in a direction perpendicular to the transfer path by the surface bending of the plurality of rollers 54, and the raw material 10 has a small particle size due to the vibration in the vertical direction. Are stacked on the charging chute 50 and transported sequentially from the one having the large particle size.

Even when the charging chute 50 includes a plurality of rollers 54 arranged along the conveying path, the vibration frequency f of the vibrating surface so that the value of the dimensionless acceleration a expressed by the above equation 1 becomes 8 or more. ) And the amplitude (A) must be determined so that the Brazil Nut Effect (BNE) can occur regardless of the density or size ratio of the particles having various sizes constituting the mixture. Here, the amplitude A is proportional to the maximum height H of the convex portion 52 formed on the vibrating surface, the vibration frequency f is proportional to the inclination angle θ of the conveying path, and the wavelength λ of the convex portion 52. ) Has the inverse relationship as described above.

In addition, as shown in Figure 8, the charging chute 50 according to another embodiment of the present invention may be formed as a trajectory of the curve, the transfer path of the charging chute 50 is inclined angle (θ from the top to the bottom) ) Can be formed to decrease. In this case, the upper part of the charging chute 50 is sequentially stacked and transferred from having a small particle size to having a larger particle size on the charging chute 50 by the Brazilian nut effect (BNE), and at the lower part of the charging chute 50. According to William's trajectory effect, the segregation degree in the sintered compounding raw material layer in the sintered trolley | bogie 80 can be increased as mentioned above.

However, when the charging chute 50 includes a plurality of rollers 54 arranged along the conveying path as described above, the maximum height H and the wavelength λ of the convex portion 52 are the diameter D of the roller. ) And the number. That is, when the charging chute 50 includes a plurality of rollers 54 arranged along the conveying path, the highest height H of the convex portion 52 is equal to the radius of the roller 54, and the convex portion 52 is provided. The wavelength λ of is equal to the diameter D of the roller 54.

Fig. 9 shows a charging path having inclination angles of 40 °, 45 ° and 50 ° under the condition that the reference gravity acceleration is 9.81 m / s and the length of the charging chute 50 having the linear path trajectory is 1.5 m in length. It is a graph which shows the change of the dimensionless acceleration a value with respect to the diameter D of the roller 54 contained in the chute 50, respectively.

As shown in FIG. 9, in the case of the charging chute 50 having the inclination angle of 40 °, the Brazil nut effect BNE is generated in a range in which the diameter D of the roller 54 is about 150 mm or less. The value of the dimensionless acceleration a becomes 8 or more. At this time, ten or more rollers 54 are arranged along the conveyance path of the raw material 10 to constitute the charging chute 50. On the other hand, when the diameter D of the roller 54 exceeds about 150 mm, the value of the dimensionless acceleration a becomes smaller than 8 so that the above-mentioned reverse segregation brazilian nut effect RBNE occurs.

In addition, as the inclination angle of the charging chute 50 gradually increases from 40 ° to 45 ° and 50 °, the dimensionless dimension, which is a criterion in which the Brazilian nut effect (BNE) or the reverse segregation Brazilian nut effect (RBNE) occurs on the charging chute 50, is obtained. It can be seen that the diameter D of the roller 54 whose acceleration a is 8 is gradually increased from about 150 mm.

Here, it is possible to prevent the reduction of momentum due to the surface curvature of the roller 54 on the charging chute 50 and to smoothly transport the raw material 10 by the reference gravity acceleration, while at the same time effective vibration along the upper surface of the charging chute 50. In order to generate the transfer path of the charging chute 50 may have an inclination angle of 40 ° to 50 °. In this case, the roller 54 included in the charging chute 50 has a diameter D of 150 mm or less, so that the charging chute 50 is independent of the density or size ratio of particles having various sizes constituting the mixture. It is possible to sequentially stack and transport the raw materials 10 from having a small particle size to a large particle size.

Hereinafter, the raw material charging method according to an embodiment of the present invention will be described in detail. Descriptions overlapping with those described in the raw material charging device in relation to the raw material charging method will be omitted.

Raw material charging method according to an embodiment of the present invention comprises the steps of preparing a raw material (10) (S100); Supplying the raw material 10 to the charging chute 50 (S200); The raw material 10 is controlled by controlling at least one of the highest height H, the inclination angle θ, and the wavelength λ of the convex portion 52 formed on the vibrating surface of the charging chute 50. Vibrating on the transfer path to sequentially stack and transfer a small particle size from a small particle size to have a large particle size (S300); And charging the transferred raw material 10 to a storage device.

In the process of preparing the raw material 10 (S100), the raw material 10 may be, for example, a sintered blended raw material 10 used to manufacture the sintered light used in the iron making process. However, the present invention is not limited to the sintering process, and of course, the present invention can be applied to all processes requiring vertical segregation of the raw material 10 composed of particles such as blast furnace and coke.

In the process of supplying the raw material 10 to the charging chute 50 (S200), the raw material hopper 20 passes through the hopper gate 40 through the mixed raw material 10 such as fine iron ore, secondary raw material and fine coke, and the drum feeder 30. ), The drum feeder 30 is mixed with the compounding raw material 10 supplied therein while being rotated, and fed to the charging chute 50.

The process (S300) of vibrating and feeding the raw material 10 supplied to the charging chute 50 along the transfer path is performed at the highest height H and the inclination angle of the convex part 52 formed on the vibration surface of the charging chute 50. θ) and at least one of the wavelength λ of the convex portion 52 are controlled to vibrate the raw material 10 on the transfer path so that the raw material 10 is laminated and transferred sequentially from the smallest particle size to the larger one.

In this case, the dimensionless acceleration (a) of the raw material 10 moving on the conveyance path is a proportional relationship between the amplitude (A) and the maximum height (H) of the convex portion 52, the vibration frequency ( It is calculated from the proportional relationship between f) and the inclination angle? of the conveying path and the inverse relationship between the vibration frequency f and the wavelength? of the convex portion 52. Therefore, at least one of the highest height H of the convex portion 52, the inclination angle θ, and the wavelength? Of the convex portion 52 formed on the vibrating surface of the charging chute 50 is a raw material moving on the transfer path. By controlling the dimensionless acceleration (a) to have a value of 8 or more, the raw material 10 can be vibrated on a transfer path to be sequentially stacked and transported from having a small particle size to having a large particle size. Same as one.

As described above, the charging chute 50 is controlled by controlling at least one of the highest height H, the inclination angle θ, and the wavelength λ of the convex portion 52 formed on the vibrating surface of the charging chute 50. After the raw material 10 is transferred from having a small particle size to a large particle size), the transferred raw material 10 is charged to a storage device such as the sintered trolley 80 (S400).

At this time, the sintered trolley 80 may move in a direction opposite to the horizontal component in the direction in which the raw material 10 transferred from the charging chute 50 is discharged. When the sintered trolley 80 moves in a direction opposite to the discharge direction of the raw material 10 to charge the raw material 10, the falling distance of the raw material 10 having a large particle size increases according to the trajectory effect of William as described above. Thus, the raw material 10 having a large particle size is first stacked on the sintered trolley 80, and then the raw material 10 having a small particle size is stacked thereon.

In this case, the falling distance of the raw material 10 having a large particle size increases according to the William's Trajectory Effect, so that the sintered trolley 80 accumulates from the raw material 10 having a large particle size and then moves upwards. Raw material 10 having a small particle size is accumulated. As a result, it can be seen that increasing the horizontal component in the moving direction of the raw material 10 falling apart from the lower part of the charging chute 50 is effective for segregation charging into the sintered trolley 80. Therefore, the conveyance path of the charging chute 50 may be formed as a trajectory of the curve so that the inclination angle θ decreases from the top to the bottom.

By the above process, it is possible to increase the segregation degree in the sintered compounding material layer in the sintered trolley 80, and the higher the segregation degree, the more space is secured between the particles, thereby improving the air permeability. The productivity of the sintered light can be greatly increased.

In the above, while the preferred embodiment of the present invention has been described and illustrated using specific terms, such terms are only for clearly describing the present invention, and the embodiments of the present invention and the described terms are used in the technical spirit of the following claims. It is obvious that various changes and modifications can be made without departing from the scope of the present invention. Such modified embodiments should not be understood individually from the spirit and scope of the present invention, but should fall within the claims of the present invention.

Claims

A raw material supply unit for discharging the charged raw materials;

A reservoir spaced apart from the raw material supply unit and storing the raw material discharged from the raw material supply unit; And

A charging chute having a vibrating surface formed to form a transfer path between the raw material supply part and the reservoir, and wherein the dimensionless acceleration (a) of the raw material moving on the transfer path has a value of 8 or more; .
The method according to claim 1,

The transfer path is formed to be inclined downward from the raw material supply unit to the reservoir,

The vibrating surface includes a convex portion in which a height change is periodically formed along the conveying path,

The dimensionless acceleration (a) value is determined by controlling the size of at least one of the highest height (H) of the convex portion, the inclination angle (θ) of the transport path and the wavelength (λ) of the convex portion.
The method according to claim 2,

The charging chute comprises an integral or a plurality of divided ramps,

And the convex portion comprises a surface formed by a plurality of protrusions protruding along the upper surface of the inclined plate.
The method according to claim 2,

The charging chute includes a plurality of rollers,

And the convex portion includes a surface where the rollers are arranged side by side and formed along the surface of each roller.
The method according to claim 2,

The dimensionless acceleration (a) is the following equation 1, the proportional relationship between the amplitude (A) and the highest height (H) of the convex portion, the proportional relationship between the vibration frequency (f) and the inclination angle (θ) of the conveying path and vibration The raw material charging device computed from the inverse relationship of the frequency (f) and the wavelength ((lambda)) of the said convex part.

[Equation 1]

(Where f is vibration frequency, A is amplitude, and g is gravitational acceleration.)
The method according to any one of claims 1 to 5,

The feed path of the charging chute is a raw material charging device is formed in a straight or curved trajectory.
The method according to any one of claims 2 to 5,

The feed path of the charging chute is inclined angle (θ) decreases from top to bottom.
The method according to any one of claims 2 to 5,

The feed path is a raw material charging device having an inclination angle (θ) of 40 ° to 50 °.
The method according to claim 4,

The roller is a raw material charging device having a diameter (D) of 150mm or less.
Preparing raw materials;

Supplying the raw material to a charging chute forming a transfer path of the raw material;

The raw material is transferred to the feed path by controlling at least one of the highest height H of the convex portion formed on the vibration surface of the charging chute, the height of which is periodically changed, the inclination angle of the conveying path, and the wavelength? Of the convex portion. Vibrating in a phase and sequentially laminating and transferring from having a small particle size to having a large particle size; And

Charging the raw material into a reservoir;
The method according to claim 10,

The raw material charging method in which the raw material supplied to the said charging chute vibrates in the up-down direction or the direction perpendicular | vertical to the said conveyance path | route.
The method according to claim 10,

The feed path is a raw material charging method is formed in a straight or curved trajectory.
The method according to claim 10,

At least one of the highest height (H) of the convex portion, the inclination angle (θ) and the wavelength (λ) of the convex portion is controlled so that the dimensionless acceleration (a) of the raw material moving on the transfer path has a value of 8 or more. .
The method according to claim 10,

Raw material charging method in which the raw material in the process of charging in the reservoir is laminated and charged sequentially from having a large particle size to having a small particle size.
The method according to any one of claims 10 to 14,

The said raw material is a sintering compounding material which mix | blended the fine coke which is a subsidiary material or a fuel,

And the reservoir is a sintered trolley.