WO2013183914A1 - Apparatus for charging and method for charging raw material - Google Patents

Abstract

The present invention relates to an apparatus for charging and a method for charging raw materials, comprising the steps of: preparing the raw material; supplying the raw materials into a charging shoot; and transporting the raw materials that are supplied to the charging shoot along a path having a cycloid form and charging the raw materials into a storage container, thereby increasing a horizontal separation speed of the raw materials having various densities and sizes which are separated from the charging shoot, so as to improve air permeability of the raw materials.

Description

Filling device and charging method of raw materials

The present invention relates to a charging apparatus and a charging method of the raw material, and more particularly to a charging apparatus and a charging method of the raw material that can improve the air permeability of the raw material.

In general, in the sinter plant, the sintered raw materials are charged into the sintering trolley of the sintering machine using a charging device to manufacture the sintered ore. 1 shows a typical sintered raw material charging device. The sintering raw material charging device includes a sintering raw material hopper (2) in which a sintering raw material (1) containing fine powders such as fine iron ore and limestone and fine powder coke is stored, and the sintered raw material hopper of the sintering raw material hopper (4). And a chute 9 which charges the supplied sintered raw material onto the bottom light which is first laid on the sintered trolley 8. The chute 9 is composed of the inclined plate 11 serves to classify the sintered raw material so that small particles at the top of the sintered trolley 8 and large particles at the bottom thereof are charged (vertical segregation). When the sintering raw material 1 is charged into the sintering bogie 8, the surface of the sintering raw material is evenly made by the surface of the flat plate 6, and then ignited in the ignition furnace 7 and sucked downward in the wind by the suction blower (not shown). The sintering reaction is performed by combustion of coke contained in the sintered raw material by air to produce a sintered ore.

In such a sintering operation, it is necessary to artificially encourage the coke, which is a fuel, to have a large amount of coke as fuel at the upper part so that the charged state of the raw material in the sintered trolley is placed at the lower part and the small particle at the upper part. When the vertical segregation is effectively promoted, the calorific imbalance in the up-down direction of the sintering machine is suppressed, while the productivity (sintering resistance) of the air flowing into the raw material layer in the sintering machine is lowered to improve the sintered ore productivity. In this case, it is well known that it is best to keep the loading density of the raw material evenly in the width direction of the sintering machine if possible.

However, since the upper layer portion of the sintered raw material layer has a lower in-layer temperature and a short time to be maintained at a high temperature compared to the middle and lower layer portions, the sintered ore of the upper layer portion has weak melt bonding, so that the strength of the sintered ore is low and the yield is lowered. In order to solve such a problem, various charging apparatuses and methods for inducing segregation charging and powdered coke or fine spectroscopy of a sintered compound raw material to the uppermost layer of the raw material layer have been proposed.

For example, Japanese Patent Application Laid-Open No. 2000-160261 proposes a method of increasing segregation efficiency by separately distributing powdered coke on the sintered bed layer by installing an auxiliary inclined chute behind the inclined chute to which the blended material is transferred. This approach has the burden of installing additional devices to increase segregation efficiency.

Similarly, in Korean Patent Laid-Open Publication No. 2004-17540, in order to charge powdered coke having a particle size of 3 mm or less in a trolley independently of charging a sintered blended raw material, a feeder for transporting the powdered coke is installed on the rear surface of the sintered raw material to install the powdered coke feeder on the rear surface of the sintered raw material By adopting the method of adding the powdered coke to improve the bond strength and recovery of the sintered ore. In addition, in Korean Patent Laid-Open Publication No. 2002-7085, a screw feeder for adding a heat source is installed between middle and lower ends of a charging device to charge the bunk coke supplied from a bidirectional screw feeder using a vibration vibrator under the screw feeder. Suggested.

In addition, in Korean Laid-Open Patent Publication No. 2000-41274, in order to control the charging distribution of coke present in the blended raw material in the thickness direction of the blended raw material layer, a chain arranged at a downward interval with a predetermined interval is installed in the drum feeder, By adopting a method of controlling the charging distribution, a method of distributing coke ratio in the uppermost layer of the raw material layer in the truck by 0.5% or more compared to the lowermost layer is proposed. However, when the compounding material falls from the inclined chute, the compounding material or powdered coke (especially fine coke) is hit by the chain, leading to the upper layer of the sintered bogie. Hard to do

And in Korean Patent Laid-Open Publication No. 2002-46070, in order to segregate the powdered coke and fine raw material in the top of the raw material layer, in order to separate the raw material and the powdered coke with fine particle size, and to charge it on top of the raw material layer. The second slope chute is installed behind the inclined chute and the classifying raw material level detector is installed at the bottom so that the fine particles are moved to the second slope chute by the air discharged from the air jet nozzle and charged in the upper part of the raw material layer. have. However, due to the nature of the sintering plant with a lot of scattering dust, the classification of the raw materials by air injection adversely affects the operating environment and the life of the peripheral device. Similar methods are also shown in Japanese Laid-Open Patent Publication No. 1995-034142. In addition, various techniques for segregation of raw materials have been proposed in the prior art literature.

These charging devices and methods induce powder segregation of coke and particulate material (microspectral) to segregate the raw material on the upper part of the raw material layer in the sintered bogie. By adopting a changing method, the environment in the sintering plant is worsened, or additional equipment must be installed separately, thereby increasing the cost of the equipment, and the maintenance is also difficult.

In addition, there is a problem in that the loading density of the raw material, that is, the segregation degree is lowered due to various variables such as adhesion light is generated on the chute or the raw material accumulated in the sintered trolley collapses during the actual operation, there is a problem that the breathability. As a result, there is a problem in that the quality and productivity of the sintered ore decreases.

The present invention provides a charging apparatus and charging method of the raw material that can improve the degree of segregation of the charged raw material to improve the breathability.

The present invention provides a charging apparatus and a charging method of a raw material capable of inducing segregation of powdered coke and fine spectroscopy without affecting the flow of the raw material.

The present invention provides a charging apparatus and a charging method of the raw material that can improve the quality and productivity of the sintered ore to be manufactured.

A charging device for raw materials according to the first embodiment of the present invention is a charging device for raw materials including a raw material supply unit for supplying the raw material and a charging chute for transferring the raw material supplied from the raw material supply unit to the storage device. The feed path of the raw material is characterized in that formed in a curved surface of the cycloid curve.

A charging device for raw materials according to a second embodiment of the present invention is a charging device for raw materials including a raw material supply unit for supplying the raw material and a charging chute for transferring the raw material supplied from the raw material supply unit to the storage device. The feed path of the raw material is characterized in that formed in the curved surface of the prolate cycloid curve.

A charging device for raw materials according to a third embodiment of the present invention is a charging device for raw materials including a raw material supply unit for supplying raw materials and a charging chute for transferring the raw material supplied from the raw material supply unit to a storage device. A plurality of rolls are arranged side by side to form a feed path of the raw material, the central axis of the plurality of rolls is located in the prolate cycloid curve, the feed path of the raw material formed on the plurality of rolls is a curved surface in the form of a cycloid curve It is characterized by being formed.

The incident angle formed by the portion in which the raw material is introduced into the vertical direction in the charging chute may be smaller than an escape angle formed by the portion in which the raw material is discharged into the horizontal direction.

The incident angle may be 5 to 50 °, and the escape angle may be 10 to 60 °.

The charging chute may be formed of a plurality of rolls or inclined plates.

The plurality of rolls may be arranged to continuously increase in diameter from the top to the bottom of the charging chute.

The charging chute is divided into a plurality of regions along the moving direction of the raw material, the plurality of rolls are arranged to have the same diameter in each region, and the diameter may increase from the upper region to the lower region of the charging chute. have.

In addition, the charging chute is a plurality of rolls are arranged side by side to form a feed path of the raw material, the plurality of rolls comprises at least a portion of the electrode-magnetic roll is charged, at least a portion of the magnetic, the electrode The magnetic roll may include a fixed roll that does not rotate, a rotating roll that surrounds the outside of the fixed roll and rotates along an outer circumferential surface of the fixed roll, and an electrode plate and a magnetic body disposed on at least a portion of the fixed roll.

The magnetic body may be provided at a portion corresponding to a transfer path through which the raw material is transferred.

The magnetic body may be arranged to be biased to an adjacent magnetic roll located in the advancing direction of the raw material.

The magnetic material may be formed in a region of 110 ° to 150 ° based on the center of the fixing roll.

The raw material supply unit includes a charging device for charging the raw material, wherein the electrode-magnetic roll forms a charged region having the same polarity as the raw material on a transfer path adjacent to the raw material supply unit, and below the transfer path Forming a plurality of primary electrode-magnetic rolls forming a charged region having a polarity opposite to that of the raw material, and a charged region having a polarity opposite to the charged region having the same polarity as the raw material on a transport path adjacent to the reservoir; It may comprise a plurality of secondary electrode-magnetic rolls.

Electrode plates having different polarities may be spaced apart from each other on the fixing roll.

The electrode plate may be provided to overlap at least part of the magnetic material.

The secondary electrode-magnetic roll may have a charged region having a polarity opposite to that of the raw material in a direction in which the raw material is transferred.

The fixing roll may include an electromagnetic insulator.

At least one of the fixing roll, the electrode plate, and the magnetic body may be provided with an electromagnetic insulator.

The plurality of electrode-magnetic rolls may be disposed 5 to 8 mm apart.

A scraper may be disposed below the electrode-magnetic roll.

Charging method of the raw material according to an embodiment of the present invention, the charging method of the raw material, the process of preparing the raw material; Supplying the raw material to a charging chute; And transferring the raw material supplied to the charging chute into a path of a cycloid curve form and charging the raw material into a reservoir.

During charging to the reservoir, the surface of the raw material layer of the charging chute may form a trajectory in the form of a cycloid curve.

In the process of supplying the raw material to the charging chute, the raw material may be supplied to a charging chute in the form of a prolate cycloid curve to transfer the raw material supplied to the charging chute in the path of the cycloid curve to charge in the reservoir.

In the process of charging the reservoir, the raw material may have a horizontal release speed that is greater than the vertical release rate and may be released from the charging chute.

The reservoir may move in a direction opposite to the direction in which the raw material leaves the charging chute.

In the process of charging the reservoir, the raw material may be charged from particles having a high density or size.

In the process of transferring the raw material supplied to the charging chute in a path of a cycloid curve form and charging it into a reservoir, the raw material having small particles is selected from the raw material and formed inside the reservoir by using the charge characteristics and magnetic properties of the raw material. It can be charged to the upper part of the raw material layer.

The present invention can increase the horizontal release rate of raw materials having various densities and sizes leaving the charging chute. Thereby, segregation degree of the raw material charged in the moving sintering trolley | bogie can be improved. In addition, since the segregation degree of the raw material is improved, it is possible to improve the air permeability in the raw material layer to improve the quality and productivity of the sintered ore produced. It also has the effect of improving segregation of raw materials without greatly changing the equipment.

In addition, segregation efficiency of the raw material charged into the reservoir can be improved without affecting the flow of the raw material. That is, in the charging chute consisting of a plurality of rolls, the electrode and the magnetic body are formed on a part of the roll so that the powdered coke contained in the raw material is stored in the space formed between the rolls by using the magnetic attraction force and the repulsive force, and the non-spectrality is used by the magnetic force. By charging into the group, segregation efficiency can be improved without disturbing the flow of raw materials. Thereby, segregation degree of the raw material charged in the moving sintering trolley | bogie can be improved. In addition, by improving segregation of the raw material, the air permeability in the raw material layer can be improved, and the quality and productivity of the sintered ore produced by supplementing the heat shortage phenomenon in the upper part of the raw material layer can be improved.

In particular, since the roll is configured to separate the fixed roll and the rotary roll, if any one of them is damaged, only the damaged part can be removed and repaired, so maintenance is easy. In addition, since the electrode and the magnetic body are connected to the fixed roll, the wiring for applying power to the electrode or the magnetic body can be prevented from damaging the connection portion between the roll and the wiring due to the rotation of the roll.

1 is a view schematically showing a typical sintered raw material charging device.

2 and 3 are views for explaining the operating principle of the raw material charging device according to the first embodiment of the present invention.

4 is a view showing a raw material charging apparatus according to a first embodiment of the present invention.

5 is a view showing a charging chute of the raw material charging apparatus according to the first embodiment of the present invention.

6 is a view for comparing the horizontal deviation speed along the path.

7 is a graph showing the change in the horizontal release speed (V _Eh ) according to the height change of the charging chute.

8 is a view for explaining the principle of operation of the raw material charging device according to a second embodiment of the present invention.

9 is a view showing a charging chute of the raw material charging device according to a second embodiment of the present invention.

10 is a view for comparing the horizontal deviation speed along the path.

11 is a view for explaining the principle of operation of the raw material charging device according to a third embodiment of the present invention.

12 is a view showing a charging chute of a raw material charging device according to a third embodiment of the present invention.

13 is a view showing a modification of the charging chute.

14 is a graph showing the change in the horizontal fall distance according to the type of charging chute.

15 is a view schematically showing a raw material supply unit of a raw material charging device according to a fourth embodiment of the present invention.

16 is a view schematically showing a charging chute of a raw material charging device according to a fourth embodiment of the present invention.

17 shows the structure of an electrode-magnetic roll.

18 and 19 are diagrams for explaining the arrangement of electrodes and magnetic bodies.

20 is a view showing a transfer state of the raw material conveyed along the charging chute.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention; However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and only the embodiments are intended to complete the disclosure of the present invention and to those skilled in the art to fully understand the scope of the invention. It is provided to inform you.

The present invention relates to a charging device for charging a raw material containing particles of various densities and sizes to a moving reservoir, and may be applied to separate and load the raw materials by density and size of particles in the reservoir. In this way, the raw material charged into the reservoir can improve the air permeability by forming a space between the raw material particles. Hereinafter, a charging device for sintering raw materials and a charging method for charging the sintering blending raw materials used to manufacture the sintered ore used in the iron making process will be described as an example.

2 and 3 are views for explaining the operating principle of the raw material charging device according to the first embodiment of the present invention.

The degree of segregation of raw materials in the raw material layer in the sintered trolley is based on the principle of powder segregation. Fig. 2 is a graph for explaining the principle of powder segregation, in which particles of raw material discharged from the inclined chute are separated from the inclined plane at a speed of V and have a θ angle component. In general, according to the well-known William's trajectory effect, as shown in Equation 1 below, the horizontal fall distance (L) of the powder is the horizontal release velocity (V _Eh ) and the density (ρ) and size of the particles It is proportional to the square of (a).

Equation 1

That is, the larger the density and diameter of the particles, the larger the horizontal release rate (V _Eh ), the greater the drop distance, and the larger the horizontal release rate (V _Eh ) for particles having the same density (ρ) and diameter (a), the raw material. The layers are stacked at the bottom. The higher the segregation degree, the more space is secured between the particles, thereby improving the air permeability. That is, in the case where particles having different densities and diameters are mixed with each other and laminated, particles having a small diameter are mixed between particles having a large diameter, for example, space is lost between the particles, resulting in low air permeability.

It can also be seen that increasing the horizontal velocity component of particles falling off at the end of the charging chute is effective for segregation charging. Here, the horizontal velocity of the particles leaving the charging chute represents dispersion by the momentum difference of the particles, and is directly related to segregation charging, and the vertical velocity represents pressure applied to the raw material layer, and is related to the charging density.

Thus, in order to effectively segregate the raw materials, it is necessary to increase the horizontal velocity of the falling particles. Of course, as the width and height of the charging chute increase, the horizontal speed can be increased, but the size of the equipment needs to be increased, so it is not feasible in terms of manufacturing, control, and economics.

Therefore, in the first embodiment of the present invention, when the sintered blended raw material leaves the charging chute, the horizontal velocity is maximized to increase the segregation charging effect of the sintered trolley to improve the air permeability of the raw material layer in the sintered trolley, Thereby, the quality and productivity of a sintered ore can be improved.

In the raw material charging device according to the first embodiment of the present invention, in forming a charging chute for injecting various blended raw materials into a sintering cart, the charging chute is formed to have a curved surface in the form of a cycloid curve known as the shortest falling curve. The horizontal release rate of the sinter blended raw material can be increased.

As shown in FIG. 3, the cycloid curve means a trajectory of a vertex S on the circumference when a circle having a radius r is rolled along a straight line on a plane, and is represented by Equations 2 and 3 below.

Equation 2

(r is the radius of the circle, θ is the angle the circle rotates)

Equation 3

Here, the length d of the charging chute, the incident angle ф _S at the position S at which the raw material is discharged to the charging chute from the drum feeder, and the charging chute escape angle at the position E at which the raw material is separated from the charging chute. If (ф _E ) is fixed, the following equations (4) and (5) can be used to derive the radius (h) of the circle and the height (h) of the position (S) at which the raw material enters the charging chute from the drum feeder. The incident angle is an angle formed by the charging chute with a straight line in the vertical direction, an upper side angle of the charging chute through which the raw material flows from the drum feeder, and an escape angle is an angle formed by the charging chute with a straight line in the horizontal direction, and the raw material is discharged to the sintering cart. Is the lower side angle of the charging chute.

Equation 4

Equation 5

The release rate V _E , the horizontal release rate V _Eh , and the vertical release rate V _Ev of the sintered compound raw material release point E may be expressed as follows.

Equation 6

(g is gravity acceleration)

Equation 7

The charge chute has a path following the curves shown in Equations 2 and 3, and the sintered compound raw material discharged from the charge chute manufactured in such a path has a length (d) and a height (h) of the charge chute determined when leaving the charge chute. , The maximum horizontal velocity with respect to the incident angle ф _S and the escape angle ф _S.

4 is a view showing a raw material charging device according to a first embodiment of the present invention, Figure 5 is a view showing a charging chute of the raw material charging device according to a first embodiment of the present invention.

The raw material charging device includes a raw material supply unit including a raw material hopper 100 and a drum feeder 120, and a charging chute 130.

The raw material hopper 100 supplies the blending raw material 1 such as fine iron ore, subsidiary materials and fine coke to the drum feeder 120 via the hopper gate 110, and the drum feeder 120 is rotated and fed into the blending material. The raw material 1 is mixed and sent out to the charging chute 130.

The charging chute 130 forms a sloped surface and serves to classify the raw material 1 so that the small particles at the top of the sintered trolley 200 and the large particles at the bottom thereof are charged (vertical segregation). When the raw material is charged into the sintered trolley 200, the surface of the raw material is evenly made by the surface of the flat plate 140 to ignite in the ignition furnace 150, and the raw material by the air sucked downward in the wind by the suction blower (not shown) ( Sintering reaction is performed by the combustion of coke contained in 1), and a sintered ore is manufactured.

The charging chute 130 may be formed by arranging the plurality of rolls 132 side by side, or may be formed of an integrated inclined plate (not shown). Charging chute 130 has a conveying path formed into a curved surface having an area, the cross-sectional shape of the charging chute 130 is formed in the form of a cycloid curve. In the charging chute 130, the charging chute release rate V _E of the raw material is determined by Equation 6 according to the change in the length d, the height h, the incident angle ф _S , and the escape angle ф _E. . At this time, when it is assumed that the height of the charging chute 130 is fixed to 1m, the incident angle (ф _S ) of the charging chute 130 is about 5 to 50 °, the escape angle (ф _E ) is about 10 to 60 ° Can be. When the incidence angle and the escape angle of the charging chute 130 are within the suggested ranges, the transfer path of the charging chute 130 can be made into an ideal cycloidal curved shape, so that the horizontal churning speed of the raw material (V _Eh ) is increased to increase the raw chute churning speed of the raw material. (V _E ) can be maximized.

FIG. 6 is a diagram for comparing a horizontal release speed along a path, and FIG. 7 is a graph showing a change in horizontal release speed V _Eh according to a change in height of a charging chute.

Figure 6 (a) shows the loading chute departure rate of the raw material in the charging chute having a straight slope. In the case of the charging chute having a straight inclined surface, when the length d and the height h of the charging chute are determined, the inclination angle ф of the charging chute is determined.

Figure 6 (b) shows the loading chute departure rate of the raw material in the charging chute having a slope of the cycloid curved surface according to the present invention. Here, the conveyance path of the charging chute is determined by the length d, the height h, the incident angle and the escape angle of the raw chute.

Comparing Figs. 6 (a) and 6 (b), when the length (d) and the height (h) of the charging chute are the same, when the transfer path of the charging chute is in the form of a cycloid, the charging chute is horizontal than the straight chute. It can be seen that the departure speed V _Eh is increased and the vertical departure speed V _Ev is decreased.

For accurate comparison, when the length (d) of the charging chute is fixed to 1m and the height (h) is changed to 0.8m, 1.0m, or 1.2m, the raw material leaving horizontal speed (V _Eh ) and the dropping distance ( L) and each variable are summarized in Table 1 below. Here, Examples 1 to 3 show the case of the cycloid curved charging chute, Comparative Examples 1 to 3 show the case of the linear charging chute, the interaction caused by the disturbance caused by the formation of the adhesion light and the layer flow of the particles Did not consider

Table 1

	d / h (m)	Φ (°)	Φ s (°)	Φ E (°)	V Eh (m / s)	L (m)
Example 1	1.0 / 0.8		41.9	30	3.43	0.34
Example 2	1.0 / 1.0		26.5	30	3.84	0.38
Example 3	1.0 / 1.2		6.8	30	4.20	0.41
Comparative Example 1	1.0 / 0.8	38.7			3.07	0.30
Comparative Example 2	1.0 / 1.0	45			3.11	0.30
Comparative Example 3	1.0 / 1.2	50.2			3.08	0.30

According to the said Table 1, when the length and height of a charging chute are the same, the horizontal release speed V _Eh and the distance L in Examples 1-3 are horizontal release speed V _Eh in Comparative Examples 1-3. It can be seen that the increase compared to the falling distance (L). For example, when comparing Example 1 and Comparative Example 1, in Example 1, the horizontal release speed V _Eh is 3.43 m / s, and the drop distance L of the raw material is 0.34 m, whereas in Comparative Example 1, the horizontal release speed V is shown. _Eh ) is 3.07 m / s, and the drop distance L of the raw material is represented by 0.30 m. The horizontal release speed V _Eh in Example 1 is about 11.73%, and the drop distance L is about 13.3%. It can be seen that the degree increased. In addition, it was confirmed that the horizontal escape rate (V _Eh ) as a whole increased by 12 to 36% compared to each of the d / h of the charged chute chute type of chute chute chute.

7 shows the change in the horizontal release speed V _Eh of the raw material according to the change in the height of the charging chute in a state in which the length d of the charging chute is fixed at 1 m. According to FIG. 7, it turns out that the horizontal release speed of the raw material in the charging chute of a cycloid curved surface has a high value compared with the horizontal release speed in the charging chute of a linear form. In particular, when the height of the charging chute is 1.316 to 1.417, the horizontal release rate is the highest, and it can be seen that the average increase is up to 24% and up to 66.7% compared to the straight charging chute.

As such, when the horizontal separation speed of the raw material increases, the drop distance increases according to Equation 1 when the density ρ and the size a are constant. In addition, when the horizontal separation speed is constant, the segregation degree may be improved by increasing the drop distance of the raw material having a large density ρ and size a.

In addition, while charging the raw material into the sintered trolley, the sintered trolley moves in a direction opposite to the direction in which the raw material leaves. At this time, the falling distance of the raw material having a high density and size is increased, and the raw material having a high density and size is stacked on the sintered trolley, and then the raw material having a low density and size is stacked on the upper portion thereof. Therefore, the segregation degree in the sintered blended raw material layer in the sintered trolley increases to increase the air permeability, thereby greatly increasing the productivity of the sintered ore.

In the second embodiment of the present invention, when the sintered blended raw material leaves the charging chute, the horizontal speed of the raw material positioned at the bottom of the charging chute, that is, the bottom of the raw material layer is maximized, and at the same time, the height of the raw material layer on the charging chute is increased. In consideration of this, it is possible to improve the segregation charging effect of the sinter bogie by maximizing the charging chute escape (escape) rate of the relatively large particles projecting on the surface of the raw material layer by the slope classification while moving the inclined surface of the charging chute. Accordingly, the air permeability of the raw material can be improved to improve the quality and productivity of the sintered ore.

8 is a view for explaining the principle of operation of the raw material charging device according to a second embodiment of the present invention, Figure 9 is a view showing a charging chute of the raw material charging device according to a second embodiment of the present invention, Figure 10 is a diagram for comparing the horizontal deviation speed along the path.

In the charging device for sintering raw materials according to the second embodiment of the present invention, in forming a charging chute for injecting various blended raw materials into a sintering cart, the charging chute is formed by having a curved surface in the form of a prolate cycloid curve. The horizontal release rate of the sintered blended raw material can be increased by allowing the surface of the raw material layer moving along the path of the chute, i.e., the top layer, to flow while forming a cycloid curve trajectory known as the shortest falling curve.

The prolate cycloid curve is located outside when a small circle (circle with radius r) located inside of a concentric circle having two different radii (r, r _P ) rolls a plane as shown in FIG. 8. It means the trajectory drawn by the vertex P on the circumference of a large circle (circle whose radius is r _P ) to be expressed by the following equations (8) and (9).

Equation 8

(Where r is the radius of the small circle, t is the difference between the radius of the large circle and the small circle (r _P -r)

Equation 9

The length of the charging chute (d), the angle of incidence (ф _PS ) at the position (P) at which the sinter blending raw materials are discharged from the drum feeder to the charging chute, the thickness (t) of the raw material fluidized bed on the charging chute, and the sintering blending raw materials If the charging chute exit angle ф _E at the position E is separated from the fixed position _E , the radius of the circle r _P and the compounding material are introduced into the charging chute from the drum feeder using Equations 10 and 11 The height h _{P of P} ) can be derived.

Equation 10

Equation 11

The release rate (V _PE ), the horizontal release rate (V _PEh ) and the vertical release rate (V _PEv ) of the raw material at the bottom of the raw material fluidized bed (surface of the charging chute) at the point where the raw material leaves (E) are _expressed by the following mathematical _equation . Equation 12 and 13 can be represented.

Equation 12

Equation 13

The charging chute has a path following the curves shown in Equations 8 and 9, and the raw material discharged from the charging chute surface has the length (d), height (h), angle of incidence (ф _PS ), The maximum horizontal velocity is obtained with respect to the escape angle ф _E.

When the oblique trajectory of the charging chute has a prolate cycloidal shape, the curve trajectory of the raw material particles at the top (surface) of the raw material fluidized bed considering the fluidized bed thickness t of the sintered blended raw material has a general cycloidal curve equation.

As shown in FIG. 8, the cycloid curve means a trajectory of a vertex on a circumference when a circle (small circle) having a radius r is rolled along a straight line on a plane, and is represented by Equations 2 and 3 above. Is expressed. In this case, the cycloid curve may appear to be formed in a shape similar to the prolate cycloid curve, but the distance (t, the same as the thickness of the raw material layer) between both curves increases toward the position E where the raw material leaves the charging chute. It can be seen that.

Here, if the charge chute escape angle ф _E at the position E where the raw material is separated from the charge chute in the state where the length d of the charge chute and the height h of the charge chute is determined, the above equation At the radius R of the circle by 4 and 5, the height h of the position P at which the raw material is supplied from the drum feeder to the charging chute, and at the position P at which the raw material is discharged to the charging chute from the drum feeder. It can be derived by iteratively calculating the incident angle ф _S. The incident angle ф _S is an angle formed by the charging chute with a straight line in the vertical direction, an upper side angle of the charging chute supplied with the raw material from the drum feeder, and an escape angle is an angle formed by the charging chute with a straight line in the horizontal direction. The lower side angle of the charging chute discharged to the sinter bogie.

The release rate V _E , the horizontal release rate V _Eh , and the vertical release rate V _Ev of the sintered blended raw material at the point E at which the raw material leaves the charging chute are represented by Equations 6 and 7 described above. Can be.

The charging chute has a path of a prolate cycloid curve following the curves shown in Equations 8 and 9, and the raw particles at the surface of the raw material layer flow with a path of the cycloid curve. In this case, the particles have a maximum horizontal velocity with respect to the length d, the height h, the incident angle ф _PS , and the escape angle ф _E of a predetermined charging chute.

Referring to FIG. 9, the charging chute 130 may be formed by arranging the plurality of rolls 132 side by side, or may be formed of an integrated inclined plate (not shown). The charging chute 130 has a conveying path formed by a curved surface having an area, and the cross-sectional shape of the charging chute 130 has a form of a prolate cycloid curve as shown in Equation 8 described above. In addition, the lateral cross-sectional shape of the surface of the raw material layer moving on the charging chute 130 has a trajectory in the form of a cycloid curve as shown in Equations (2) and (3). Subsequently, the raw material particles on the surface of the raw material layer leaving the charging chute 130 may have a length d, a height h, an incident angle ф _PS , and an escape of the charging chute 130 determined to form a curved path of the charging chute. For the angle ф _{E it} has the maximum horizontal release velocity V _Eh .

10 (a) shows the charge chute departure rate of the raw material in the charge chute having a straight slope. In the case of the charging chute having a straight inclined surface, when the length d and the height h of the charging chute are determined, the inclination angle ф of the charging chute is determined.

Figure 10 (b) shows the charge chute departure rate of the raw material particles on the surface of the raw material layer in the charging chute having an inclined surface in the form of a prolate cycloid curved surface according to the present invention. Here, the transfer path of the charging chute is determined by the change of the length (d), the height (h) of the charging chute, the incident angle (ф _PS ) and the escape angle of the raw material, and the speed at which the raw material leaves the charging chute (V _PE , V _E ) is determined by equations (12) and (6).

Comparing Figs. 10 (a) and 10 (b), when the length (d) and height (h) of the charging chute are the same, when the transfer chute of the charging chute is in the form of a prolate cycloid surface, the charging chute is in a straight line. It can be seen that the horizontal release rate V _Eh is increased and the vertical release rate V _Ev is decreased. In addition, it can be seen that when the transfer path of the charging chute is in the form of a prolate cycloid curved surface, the separation speed V _PE at the charging chute surface and the separation speed V _E at the raw material layer surface are almost the same.

For accurate comparison, when the length of the charging chute (d) is fixed to 1m and the height (h) is changed to 0.8m, 1.0m, and 1.2m, the raw material exit horizontal velocity (V _PEh ) and each variable for each charging chute are _adjusted . It is summarized in Table 2 below. Here, Examples 1 to 6 show the case of the cycloid curved charging chute, Comparative Examples 1 to 3 show the case of the straight chute chute, and the interaction caused by the disturbance caused by the formation of the adhesion light and the layer flow of the particles Did not consider

TABLE 2

	t (mm)	d / h (m)	Φ (°)	Φ PS / Φ S (°)	Φ E (°)	V PEh / V Eh (m / s)
Example 1	10	1.0 / 0.8		42.4 / 41.9	30	3.43 / 3.43
Example 2	10	1.0 / 1.0		32.5 / 26.5	30	3.7 / 3.84
Example 3	10	1.0 / 1.2		9.4 / 6.8	30	4.2 / 4.2
Example 4	50	1.0 / 0.8		44.3 / 41.9	30	3.43 / 3.43
Example 5	50	1.0 / 1.0		30 / 26.5	30	3.84 / 3.84
Example 6	50	1.0 / 1.2		15.7 / 6.8	30	4.2 / 4.2
Comparative Example 1		1.0 / 0.8	38.7			3.07
Comparative Example 2		1.0 / 1.0	45			3.11
Comparative Example 3		1.0 / 1.2	50.2			3.08

According to Table 2, when the length and height of the charging chute are the same, the horizontal release speed (V _PEh ) in Examples 1 to 6 compared to the horizontal release rates (V _PEh , V _Eh ) in Comparative Examples 1 to 3 It can be seen that the increase. For example, when comparing Example 1 and Comparative Example 1, in Example 1, the horizontal release speeds V _PEh and V _Eh are 3.43 / 3.43 m / s, whereas in Comparative Example 1, the horizontal release speed V _Eh is 3.07 m / s. It can be seen that, in Example 1, the horizontal release speeds V _PEh and V _Eh increased by about 11.73% compared with Comparative Example 1. In addition, as a whole, the horizontal escape rates (V _PEh , V _Eh ) was found to increase by about 12 to 36% compared to each d / h in the case of the charged chute of the _prolate cycloid curved form.

When the horizontal separation speed of the raw material increases, the fall distance is increased by Equation 1 when the density ρ and the size a are constant.

In addition, since the raw material particles have substantially the same horizontal separation rate from the surface of the charging chute and the surface of the raw material layer, when the slope is generated in the raw material layer, the particles having the larger size of the particles move to the upper part of the raw material layer. Therefore, when the horizontal departure rate is constant, the segregation degree is improved by increasing the drop distance of the raw material having a large density (ρ) and size (a), that is, relatively large particles present near the surface of the raw material layer flowing through the charging chute. Can be.

In addition, while charging the raw material into the sintered trolley, the sintered trolley moves in a direction opposite to the direction in which the raw material leaves. At this time, the falling distance of the raw material having a high density and size is increased, and the raw material having a high density and size is stacked on the sintered trolley, and then the raw material having a low density and size is stacked on the upper portion thereof. Therefore, the segregation degree in the sintered blended raw material layer in the sintered trolley increases to increase the air permeability, thereby greatly increasing the productivity of the sintered ore.

According to the third embodiment of the present invention, the charging chute is a transfer path for raw materials formed on the surfaces of the plurality of rolls, that is, the charging chute by placing the central axes of the plurality of rolls forming the charging chute on the trajectory of the prolate cycloid curve. Can be formed to have the trajectory of the cycloid curve known as the shortest falling curve. Accordingly, the horizontal churn rate of the raw material charged into the sinter bogie through the charging chute can be increased.

11 is a view for explaining the principle of operation of the raw material charging device according to a third embodiment of the present invention, Figure 12 is a view showing a charging chute of the raw material charging device according to a third embodiment of the present invention, 13 is a view showing a modification of the charging chute.

Referring to FIG. 11, the trajectory X of the prolate cycloid curve and the trajectory Y of the cycloid curve may be seen to be formed in a similar shape to each other. However, the distance between the trajectory (X) of the prolate cycloid curve and the trajectory (Y) of the cycloid curve is such that the raw material deviates from the charging chute from the top of the charging chute to the bottom, i.e., the position (S) where the raw material is discharged from the drum feeder. It can be seen that the further away to position (E). Here, the distance between the trajectory X of the prolate cycloid curve and the trajectory Y of the cycloid curve is the radius of the roll. Therefore, as the diameter (or radius) of the plurality of rolls forming the charging chute goes from the top of the charging chute to the bottom, i.e., the position E where the raw material leaves the charging chute, rather than the position S where the raw material is discharged from the drum feeder. It can form larger gradually.

Referring to FIG. 12, the charging chute 130 may be formed by arranging the plurality of rolls 132 side by side. The charging chute 130 has a conveying path formed into a curved surface having an area, and the cross-sectional shape of the charging chute 130 is formed in the form of a cycloid curve. At this time, the charge chute 130, that is, the plurality of rolls 132 forming the feed path of the raw material is the central axis is located on the prolate cycloid curve. The distance between the cycloid curve and the prolate cycloid curve goes further from top to bottom of the charging chute 130, whereby the plurality of rolls 132 may be formed to have different diameters (or radii). When the charging chute 130 is configured as described above, the roll 132 at the lower end of the charging chute 130 through which raw materials are discharged to the balance is formed to be relatively larger than the rolls 132 disposed on the upper side thereof. Therefore, the reduction in the life of the roll 132 disposed at the lower end of the charging chute 130, which can be most affected by the feed rate and the load of the raw material transferred along the transfer path formed on the charging chute 130 Alternatively, there is an advantage in that it is possible to extend the replacement timing of the roll 132.

As shown in FIG. 12, the charging chute 130 may be disposed so that the diameter of the roll 132 continuously increases along the moving direction of the raw material, that is, from the upper side to the lower side.

Alternatively, as shown in FIG. 13, the charging chute 130 is divided into a plurality of regions, for example, an upper region (I), an intermediate region (II), and a lower region (III), along the direction of movement of the raw materials, respectively. The rolls 1320a, 1320b, and 1320c having the same diameter can be arranged each time. In this case, the diameters of the rolls 1320a, 1320b, and 1320c may gradually increase from the upper region I to the lower region III.

The charging chute 130 determines the loading chute departure rate V _E of the raw material according to Equation 6 according to the change in the length d, the height h, the incident angle ф _S , and the escape angle ф _E. do. At this time, when it is assumed that the height of the charging chute 130 is fixed to 1m, the incident angle (ф _S ) of the charging chute 130 is about 5 to 50 °, the escape angle (ф _E ) is about 10 to 60 ° Can be. When the incidence angle and the escape angle of the charging chute 130 are within the ranges presented, the transfer path of the charging chute 130 can be made into a curved shape having an ideal cycloid curve trajectory, thereby increasing the horizontal release velocity _{VEh of} the raw material. Can maximize the chute chute speed (V _E ).

14 is a graph showing a change in the horizontal drop distance according to the type of charging chute, and is an experimental result comparing the stack distribution according to the drop distance in the balance of the sintered blend raw material according to the present invention.

Sintering raw material dispensing experiments were carried out with respect to the charging chute (hereinafter referred to as "charging chute 1") of the linear split deflector plate type and the charging chute according to the present invention (hereinafter referred to as "charging chute 2").

The trolley is stationary without moving, the hopper height is 2.5m, and the lower angle of the charging chute is 40 °, and the same applies to the two charging chutes. The horizontal axis in Fig. 14 is the fall distance (cm) of the sintered blended raw material, and the vertical axis represents the stacked height ratio with respect to the total amount of raw materials dispensed.

Referring to FIG. 14, when looking at the stacking heights of the raw materials dispensed in the truck, when the charging chute 1 is used, the portion A having the highest stacking height is formed at a distance of about 35 cm, and the charging chute 2 is used. The portion B having the highest stacking height is formed at a distance of about 45 cm. Thus, as in the case of using the charging chute 2 according to the embodiment of the present invention, the horizontal drop of the raw material discharged from the charging chute through the point that the portion (B) having the highest stacking height is formed away from the raw material discharge position of the charging chute. It can be seen that the distance has increased.

 In terms of the dispersion degree in the balance, when the raw material is charged to the balance using the charging chute 1, most of the raw material is dispersed in the area C of about 20 cm to 65 cm, and charged into the balance using the charging chute 2 When it made it, it turns out that most raw materials were disperse | distributed to the area | region D about 28 cm-88 cm. That is, when the raw material is charged to the balance using the charging chute 2 according to an embodiment of the present invention it can be seen that it is uniformly dispersed over a wide area far from the charging chute.

As a result, the horizontal fall distance in the charge chute 2 configuration compared to the charge chute 1 increased by about 33%, and the dispersion of the sintered raw material increased by about 26%. Here, the disturbance caused by the formation of the adhering light and the interaction due to the layer flow of the particles are not considered.

Therefore, if the horizontal fall distance of the raw material is increased, the falling distance of the raw material with large density and size is increased, and the dispersion degree is also increased. Can be.

In addition, while charging the raw material into the sintered trolley, the sintered trolley moves in a direction opposite to the direction in which the raw material leaves. At this time, the falling distance of the raw material having a high density and size is increased, and the raw material having a high density and size is stacked on the sintered trolley, and then the raw material having a low density and size is stacked on the upper portion thereof. Therefore, the segregation degree in the sintered blended raw material layer in the sintered trolley increases to increase the air permeability, thereby greatly increasing the productivity of the sintered ore.

As described above, the segregation charging effect of the raw material can be improved by controlling the feed path of the raw material layer in the curved surface formed on the upper surface of the charging chute so as to increase the horizontal release speed of the raw material in the charging chute. Can be. In addition, it is possible to further increase the segregation charging effect of the raw material by using the charge characteristics and magnetic properties of the raw material. For example, the powdered coke and the finely divided sintered ore can be selected from the raw materials conveyed along the charging chute and charged into the upper layer of the sintered trolley. The configuration of the charging chute described below can be applied to all of the charging chute according to the first to third embodiments.

15 is a view schematically showing a raw material supply unit of a raw material charging device according to an embodiment of the present invention, Figure 16 is a view showing a charging chute of the raw material charging device according to an embodiment of the present invention, Figure 17 Is a view showing the structure of an electrode-magnetic roll, Figures 18 and 19 are views for explaining the arrangement of the electrode and the magnetic body.

The raw material charging device includes a raw material supply unit including a raw material hopper 100 and a drum feeder 120, and a charging chute 130.

The raw material hopper 100 supplies the mixed raw material 1 such as fine iron ore, secondary raw material and fine coke to the drum feeder 120 via the hopper gate 110, and the drum feeder 120 rotates and feeds the raw material. (1) is mixed and supplied to the charging chute 130.

Referring to FIG. 15, at least one of the raw material hopper 100, the drum feeder 120, and the hopper gate 110 is provided with electrode plates 100a, 120a, and 110a and is supplied to the charging chute 130. Charge 1). For example, the electrode plates 100a, 120a, and 110a may be a cathode or an anode, and all of them may be formed of the same kind of electrode. Thus, the coke of the raw material 1 may be negatively formed by the electrode plates 100a, 120a, and 110a. Or positively charged. The powdered coke is supplied to the charging chute 130 in a charged state.

Charging chute 130 is a reservoir for storing the compounding material (1) to form a slope, that is, the raw material (1) so that the small particles in the upper portion of the sintered trolley 200, the large particles in the lower portion (charging vertical segregation) It serves to classify. When the raw material is charged into the sintered trolley 200, the surface of the raw material is evenly made by the surface of the flat plate 140 to ignite in the ignition furnace 150, and the raw material by the air sucked downward in the wind by the suction blower (not shown) ( Sintering reaction is performed by the combustion of coke contained in 1), and a sintered ore is manufactured.

Referring to FIG. 16, the charging chute 130 may be formed by arranging the plurality of rolls 132a and 132b side by side. The charging chute 130 may have a straight or curved transfer path having an area, and the blending raw material 1 is charged into the sintered trolley 200 through the transfer path.

The charging chute 130 includes electrode plates 1324a, 1324b, 1324c, and 1324d that charge at least a portion of the rolls 132a and 132b, and a magnetic body 1325 that imparts magnetism to at least a portion of the rolls 132a and 132b. Electrode- magnetic rolls 132a and 132b provided are included.

In the charging chute 130, a plurality of primary electrode-magnetic rolls 132a are disposed on the drum feeder 120 side, that is, the upper side, to which the raw material 1 is supplied, and the sintering cart 200 into which the raw material 1 is charged. On the side, that is, the lower side, a plurality of secondary electrode-magnetic rolls 132b are disposed. In addition, a scraper 139 attached to the surface of the electrode- magnetic rolls 132a and 132b to remove the remaining coke and finely sintered ore to be charged into the sintering bogie 200 is disposed below the electrode- magnetic rolls 132a and 132b. It may be provided. The scraper 139 is formed in the form of a plate (plate) is formed along the longitudinal direction of the electrode-magnetic rolls (132a, 132b), the end thereof may be provided to contact the outer peripheral surface of the electrode-magnetic rolls (132a, 132b). have. At this time, since the primary electrode-magnetic roll 132a serves to recharge the charged coke among the raw materials 1 supplied through the drum feeder 120, the raw material charged by the primary electrode-magnetic roll 132a. The scraper 139 may not be formed below the primary electrode-magnetic roll 132a so that the separator may be separated from the secondary electrode-magnetic roll 132b.

The electrode- magnetic rolls 132a and 132b are fixed rolls 1321 which are installed in a fixed state, and are formed in a hollow cylindrical shape to surround the outer circumferential surface of the fixed rolls 1321, and the outer circumferential surfaces of the fixed rolls 1321 are formed. Electrode plates 1324a and 1324b and magnetic bodies 1325 disposed between the rotating rolls 1323, the fixed rolls 1321, and the rotating rolls 1323, which rotate accordingly, are included. At this time, the fixed roll 1321 and the rotary roll 1323 are connected through a connecting means 1322 such as a bearing in a state in which the outer circumferential surface of the fixed roll 1321 and the inner circumferential surface of the rotary roll 1323 are spaced apart from each other. 1323 can be rotated in a state that does not rub against the fixing roll 1321. The electrode- magnetic rolls 132a and 132b are charged using repulsive forces generated between materials having the same polarity and attractive forces generated between materials having opposite polarities. The fine powdered coke and the finely divided sintered ore, which is a magnetic material, are screened into the space between the electrode- magnetic rolls 132a and 132b.

Referring to FIG. 16, the electrode- magnetic rolls 132a and 132b are fixed rolls 1321 installed in a fixed state, and are formed in a hollow cylindrical shape to surround the outer circumferential surface of the fixed rolls 1321. The rotating roll 1323 and the electrode plates 1324a, 1324b, 1324c, and 1324d disposed between the fixed roll 1321 and the rotating roll 1323 are rotated along the outer circumferential surface of 1321. In this case, the fixing roll 1321 means a portion excluding the electrode plates 1324a, 1324b, 1324c, and 1324d and the magnetic body 1325. The fixed roll 1321 and the rotary roll 1323 are connected through a connecting means 1322 such as a bearing in a state in which the outer circumferential surface of the fixed roll 1321 and the inner circumferential surface of the rotary roll 1323 are spaced apart from each other. The fixing roll 1321 can be rotated without mutual friction.

Through this structure, magnetic regions M and non-magnetic regions N, positive charge regions X, negative charge regions Y, and non-charge regions Z are formed on the outer circumferential surfaces of the electrode- magnetic rolls 132a and 132b. Is formed. In this case, the magnetic region M and the nonmagnetic region N, the positive charge region X, the negative charge region Y, and the non-charge region Z are formed along the length directions of the electrode- magnetic rolls 132a and 132b. do.

The structures of the electrode plates 1324a, 1324b, 1324c, and 1324d and the magnetic body 1325 provided in the fixing roll 1321 will be described in detail.

First, the magnetic body 1325 is disposed to form part of the fixing roll 1321 along the longitudinal direction of the fixing roll 1321. For example, the magnetic body 1325 may be formed to form a part of the outer circumferential surface of the fixed roll 1321 as shown in FIG. 17, or may be formed in a pie shape to form the center to the outer circumferential surface of the fixed roll 1321. Since the magnetic body 1325 is formed on the fixed roll 1321 that does not rotate, the magnetic regions M and the nonmagnetic regions N are fixed to the electrode- magnetic rolls 132a and 132b. At this time, the magnetic body 1325 may be used a variety of magnetic materials having a magnetic, such as a permanent magnet, an electromagnet. As described above, in order to form the magnetic region M and the nonmagnetic region N by the magnetic body 1325, the fixing roll 1321 is preferably formed of a nonmagnetic substance.

By using the electrode- magnetic rolls 132a and 132b configured as described above, magnetizing raw materials such as magnetite (Fe ₃ O ₄ ), hematite (Fe ₂ O ₃ ), etc. contained in the raw material 1 may be used as raw materials of the sintering cart 200. It is important to place the magnetic body 1325 at the proper position of the fixed roll 1321 to charge the layer top.

The magnetic body 1325 facilitates the attachment of the magnetic material from the compounding material 10 conveyed along the conveyance path of the charging chute 130 and is disposed at a position where the adjacent electrode- magnetic rolls 132a and 132b do not interfere with each other. Therefore, the magnetic body 1325 is disposed at a position corresponding to the transfer path in the fixed roll 1321, and the adjacent electrode- magnetic rolls 132a and 132b to form a nonmagnetic region N on the transfer path. It may be formed so as not to overlap with the magnetic material 1325 to be disposed.

Meanwhile, the electrode plates 1324a, 1324b, 1324c, and 1324d may be a positive electrode (+) and a negative electrode (−), respectively, and regions charged with different charges coexist in one electrode- magnetic roll 132a and 132b. . In this case, the fixing roll 1321 may be formed of an electrical insulator, and the two electrode plates 1324a and 1324b or 1324c and 1324d are spaced apart from each other, and are formed along the length direction of the fixing roll 1321, respectively. The electrode plates 1324a, 1324b, 1324c, and 1324d may be attached to the surface of the fixing roll 1321, or may be formed to form a groove having a predetermined depth in the fixing roll 1321 and be inserted into the groove. In this case, in the region where the magnetic body 1325 is formed, the electrode plates 1324a, 1324b, 1324c, and 1324d may be provided above the magnetic body 1325, that is, outside. Since the regions where the electrode plates 1324a, 1324b, 1324c, and 1324d are formed are wider than those of the magnetic body 1325, a constant attraction force and repulsive force are applied to the charged raw material particles among the raw materials 1 transferred along the transfer path. For this purpose, the electrode plates 1324a, 1324b, 1324c, and 1324d having a large area to be formed are preferably formed on the outer side of the fixing roll 1321. However, the arrangement structure of the magnetic body 1325 and the electrode plates 1324a, 1324b, 1324c, and 1324d is not limited thereto, and the magnetic body 1325 may be disposed outside at least a portion of the electrode plates 1324a, 1324b, 1324c, and 1324d. Of course you can. In addition, the electrode plates 1324a, 1324b, 1324c, and 1324d may be formed to partially overlap the upper portion of the magnetic body 1325, or may be formed to be in direct contact with the outer circumferential surface of the rotary roll 1321. Therefore, between the magnetic body 1325 and the electrode plates 1324a, 1324b, 1324c, and 1324d, and between the fixed roll 1321 and the magnetic body 1325 and the electrode plates 1324a, 1324b, 1324c, and 1324d, they are electrically insulated and nonmagnetic. By interposing the electromagnetic insulator, the effects that may occur between the electrode plates 1324a, 1324b, 1324c, and 1324d and the magnetic body 1325 can be suppressed or prevented.

Although the electrode plates 1324a, 1324b, 1324c, and 1324d provided in the electrode- magnetic rolls 132a and 132b are described as being formed in a plate shape, the shape is not limited thereto.

Through such a configuration, positive electrode regions (X) charged with positive charges are formed on the electrode-magnetic rolls (132a, 132b) in the region where the anode is disposed in the fixed roll 1321, and negative charges in the region where the cathode is disposed. A non-charged region that does not carry a positive or negative charge between the positively charged region X and the negatively charged region Y in which the charged negatively charged region Y is formed and the electrode plates 1324a, 1324b, 1324c, and 1324d are not formed. (Z) can be formed. In the region where the magnetic body 1325 is disposed, the magnetic region M may be formed, and in the region where the magnetic body 1325 is not provided, the nonmagnetic region N may be formed. In this case, the charge, non-charge region (X, Y, Z) and the magnetic, non-magnetic region (M, N) may be partially overlapping, each region (X, Y, X, M, N) is an electrode It is formed along the longitudinal direction of the magnetic rolls 132a and 132b. Hereinafter, for convenience of description, the X area is called a positive charge area, and the Y area is called a negative charge area.

In order to charge the powdered coke and the finely divided sintered ore contained in the raw material 1 using the electrode- magnetic rolls 132a and 132b configured as described above, the electrode plates 1324a, 1324b, 1324c, It is important to arrange 1324d) at an appropriate position of the fixing roll 1321. In the case of the finely divided sintered ore, which is a magnetic material, the finely sintered ore is attached to the surface of the rotary roll 1323 in the region provided with the magnetic body 1325 in the process of being transferred along the charging chute 130 and attached to the surface of the rotary roll 1323. Moves together with the rotation of the rotary roll 1323 to move away from the surface of the rotary roll 1323 in a region where the magnetic body 1325 is not provided. However, in the case of the powdered coke, it is attached to the surface of the rotary roll 1323 in a region where the charged electrode 130 is charged and charged to the opposite polarity, and moves together with the rotation of the rotary roll 1323. In the region provided with the electrode plate charged with the same polarity, it is separated from the surface of the rotary roll (1323). However, in the raw material hopper 100 and the drum feeder 120 supplying the raw material 1, since a large amount of the raw material 1 is charged, the powder coke may not be smoothly charged in the raw material 1. Therefore, a portion of the charging chute 130 forms an electrode-magnetic roll 132a (referred to as a primary electrode-magnetic roll) to compensate for the charging of the powdered coke, and the other electrode to filter the charged powdered coke. It is necessary to form the magnetic roll 132b (referred to as secondary electrode-magnetic roll).

The magnetic body 1325 may be formed in the same shape on the primary electrode-magnetic roll 132a and the secondary electrode-magnetic roll 132b. The nonmagnetic region Y is formed between the adjacent electrode- magnetic rolls 132a and 132b so as not to interfere with the adjacent electrode- magnetic rolls 132a and 132b. The centers of the adjacent electrode- magnetic rolls 132a and 132b are connected to each other to draw an imaginary diagonal line. The magnetic body 1325 is disposed on the virtual diagonal lines thus formed. At this time, the magnetic body 1325 is formed to have a predetermined angle θ1, for example, an angle of 110 ° to 150 ° such that the nonmagnetic region N is formed between the adjacent electrode- magnetic rolls 132a and 132b. The magnetic body 1325 may be formed to be biased toward the lower electrode- magnetic rolls 132a and 132b than the upper electrode- magnetic rolls 132a and 132b. That is, the magnetic material of the raw material 1 is attached to the outer circumferential surface of the rotary roll (1323) in the magnetic region (M), and is separated from the non-magnetic region (N) as the rotary roll (1323) rotates, the sintered trolley 200 In this case, the lower electrode-magnetic roll 132b, ie, the secondary electrode-magnetic roll 132b, on which the sintered trolley 200 is disposed, facilitates filtering of the magnetic material. It is possible to improve segregation efficiency of the magnetic material without interference between the adjacent electrode-magnetic rolls 132ba and 132bb.

Through such a configuration, the electrode- magnetic rolls 132a and 132b serve as a screen for selecting the magnetizing raw material from the raw material 1 transferred along the charging chute 130. That is, the electrode- magnetic rolls 132a and 132b are spaced apart from each other in the transfer path of the charging chute 130 to alternately form the magnetic region M and the non-magnetic region N, and the electrode-magnetic roll 132a. , 132b is a magnetic material attached to the outer peripheral surface of the rotary roll (1323) of the electrode-magnetic rolls (132a, 132b) while adhering and separating the magnetic material on the outer peripheral surface as described above, the electrode-magnetic roll (132a, The distance t between the electrode- magnetic rolls 132a and 132b may be set so as not to contact the outer circumferential surface of the 132b. Usually, the gap between the rolls forming the charging chute is about 3 to 5 mm, and the distance t between the electrode- magnetic rolls 132a and 132b is set to about 5 to 8 mm which is slightly larger than the gap between the rolls. It is possible to smoothly move the magnetizing raw material attached to the outer circumferential surfaces of the rolls 132a and 132b. At this time, when the interval t of the electrode- magnetic rolls 132a and 132b is smaller than the indicated range, the magnetizing raw material attached to the outer circumferential surface of the electrode- magnetic rolls 132a and 132b is between the electrode- magnetic rolls 132a and 132b. If it is difficult to move to the space and is larger than the suggested range, a raw material having a larger particle size in addition to the magnetic material is passed between the electrode- magnetic rolls 132a and 132b and charged to the upper part of the raw material layer in the sintered trolley 200 so that segregation efficiency is increased. There is a problem of deterioration.

Such gaps between the electrode- magnetic rolls 132a and 132b and the formation range of the magnetic body 1325 may be variously changed according to the shape of the transfer path formed by the electrode-magnetic rolls 132a and 132b. to be.

The electrode plates 1324a, 1324b, 1324c, and 1324d have a first electrode having the same polarity as that of the powdered coke charged in the raw material supply part on the upper side where the compounding raw material is transferred from the primary electrode-magnetic roll 132a of the fixed roll 1321. A plate 1324a may be formed, and a second electrode plate 1324b having a polarity opposite to that of the coke may be formed on the lower side.

The first electrode plate 1324a increases the charging of the charged coke among the powdered coke supplied from the raw material supply part and also serves to charge the uncoated powdered coke. The first electrode plate 1324a is an imaginary line S based on an imaginary line S (which may be formed in parallel with a transfer path) formed by connecting centers of the plurality of primary electrode-magnetic rolls 132a. It may be formed on the upper side, and may be formed in a range where mutual interference with other adjacent electrode plates does not occur. For example, the first electrode plate 1324a may be formed within a range θ2 of about 110 to 150 ° from the center of the fixing roll 1321.

The second electrode plate 1324b attaches the powdered coke charged by the first electrode plate 1324a to the surface of the primary electrode-magnetic roll 132a by attraction, and thus, between the primary electrode-magnetic roll 132a. By discharging to the space serves to charge the upper portion of the raw material layer of the sintered cart (200). In this case, the powdered coke attached to the primary electrode-magnetic roll 132a is removed by contacting the scraper 139 provided at the lower portion as the primary electrode-magnetic roll 132a rotates, or the electrode plate is not formed. It may be removed from the surface of the primary electrode-magnetic roll 132a by the repulsive force acting in the lower region Z or the positively charged region X charged. The second electrode plate 1324b may be formed below the virtual line by being spaced apart from the first electrode plate 1324a by a predetermined distance with respect to the virtual line. In FIG. 18, the second electrode plate 1324b is formed to have a length shorter than that of the first electrode plate 1324a. However, the second electrode plate 1324b may have the same or longer length when mutual interference with adjacent electrode plates does not occur.

The secondary electrode-magnetic roll 132b is not discharged between the primary electrode-magnetic roll 132a, and the powdered coke is conveyed along the transfer path formed by the primary electrode-magnetic roll 132a using an electrical attraction force. It serves as a screen to discharge between the secondary electrode-magnetic roll 132b. Accordingly, the third electrode plate 1324c and the fourth electrode plate 1324d coexist in the transfer path formed by the secondary electrode-magnetic roll 132b. The secondary electrode-magnetic roll 132b is provided with a third electrode plate 1324c having the same polarity as that of the powdered coke so as to charge the charged powdered coke on the side opposite to the conveying direction of the compounding material. On the conveying direction side, a fourth electrode plate 1324d having a polarity opposite to that of the charged powdered coke may be provided to separate the powdered coke attached to the surface of the secondary electrode-magnetic roll 132b.

Referring to FIG. 19, the third electrode plate 1324c and the fourth electrode plate 1324d are spaced apart from each other by a predetermined distance, and disposed so as not to interfere with the electrode plates formed on the adjacent electrode- magnetic rolls 132a and 132b. It is good. This can be changed depending on the installation conditions of the various charging chutes, such as the diameter of the electrode-magnetic roll, the separation distance. The positive charge region X formed by the third electrode plate 1324c in the secondary electrode-magnetic roll 132b serves to charge the powdered coke in the compounding material transferred along the primary electrode-magnetic roll 132a. In addition, the negative charge region Y formed by the fourth electrode plate 1324d is attached to the surface of the secondary electrode-magnetic roll 132b, that is, the surface of the rotary roll 1323 by using the charged powder coke. It plays a role. As described above, the attraction force, which is a pulling force, acts between the materials having different polarities, so that the negative coke is charged with the surface of the rotary roll 1323 in the negatively charged region Y having the opposite polarity. The coke attached to the surface of the rotary roll 1323 moves to the lower side of the transfer path through the space between the secondary electrode-magnetic roll 132b as the rotary roll 1323 rotates. The powdered coke moved to the lower side of the transfer path is removed from the surface of the rotary roll 1323 by a scraper 139 provided at the lower side of the secondary electrode-magnetic roll 132b to be charged to the upper portion of the raw material layer of the sintered bogie 200. do.

Through such a configuration, the electrode- magnetic rolls 132a and 132b serve as screens for separating powdered coke and finely divided sintered ore from the compounding raw material 1 transferred along the charging chute 130. That is, the charging chute 130 is formed of an electrode plate and a magnetic body formed with a magnetic material so that the powdered coke is charged and transferred from the blended raw material supplied from the raw material supply unit, and the electric force, repulsive force, and magnetic force are used in the transferring process. The powdered coke may be charged into an upper portion of the raw material layer of the sintered trolley 200.

Hereinafter, the raw material charging method which concerns on embodiment of this invention is demonstrated.

20 is a view showing a transfer state of the raw material conveyed along the charging chute.

Referring to FIG. 20, when the raw material 1 including the prepared Buncocos, sintered ore is supplied to the charging chute 130 through the drum feeder 120, the mixing raw material 1 is formed in the charging chute 130. It moves along the conveyance path and is charged to the sinter truck 200. At this time, the powdered coke of the raw material 1 supplied to the charging chute 130 is the cathode by the electrode plate (100a, 110a, 120a) formed in the raw material hopper 100, the drum feeder 03 and the hopper gate 110. Or positively charged.

The raw material 1 supplied to the charging chute 130 is classified in a slope on the transfer path so that raw materials having a small particle size, such as powdered coke and finely sintered ore, are located in the upper portion of the transfer path and have a larger particle size such as secondary raw materials. Position and transported. And the powdered coke in the blended raw material 1 is transferred along the transfer path (upper side of the charging chute) formed by the primary electrode-magnetic roll 132a, while the charged coke is charged in the raw material supply unit, The powdered coke that is not charged in the feeder is charged with the same polarity as the charged coke in the feeder.

On the other hand, the finely divided sintered ore, which is a magnetizing raw material among the raw materials 1, is transferred along the transfer path formed by the electrode- magnetic rolls 132a and 132b, and the rotary roll 1323 of the rotary roll 1323 is provided on the transfer path provided with the magnetic body 1325. Is attached to the surface. After that, the sintered fine ore rotates when the rotary roll 1323 rotates and reaches the lower side of the transfer path while being attached to the rotary roll 1323 to reach an area where the magnetic body 1325 is not formed, that is, a nonmagnetic region N. It is separated from the surface of the roll 1323 and charged to the upper portion of the raw material layer of the sintered trolley 200.

Thereafter, the raw material 1 is transferred along the transfer path (lower side of the charging chute) formed by the secondary electrode-magnetic roll 132b, and charged by the raw material supply part and the primary electrode-magnetic roll 132a. The powdered coke is discharged into the space between the secondary electrode and the magnetic roll 132b by the electric repulsive force and is charged to the upper portion of the raw material layer of the sintered trolley 200. The charged coke in the raw material supply part is attached to and separated from the surface of the electrode- magnetic rolls 132a and 132b while passing through the charged region having the same polarity as the powdered coke and the charged region with the opposite polarity, and then separating the electrode-magnetic roll 132a. , 132b) is segregated into the top of the raw material layer of the sintered trolley 200 through the space between the charge chute 130 and the end of the charging chute 130 (secondary electrode-magnetic roll sintered trolley). For example, the powdered coke charged to have a positive charge in the raw material supply part is transported along a transport path formed by the primary electrode-magnetic roll 132a so that the positive charge amount increases or has a positive charge on the transport path. Is charged. The positively charged powdered coke is transported along the transport path by the rotation of the primary electrode-magnetic roll 132a, some of which are discharged into the space between the primary electrode-magnetic roll 132a. At this time, some of the coke discharged between the primary electrode-magnetic roll 132a is attached to the negative charge region (Y) in the primary electrode-magnetic roll 132a, and the rotary roll of the primary electrode-magnetic roll 132a 1323 rotates and contacts the scraper 139 provided at the lower portion of the primary electrode-magnetic roll 132a to be separated from the surface of the primary electrode-magnetic roll 132a, and to the upper portion of the raw material layer of the sintered trolley 200. It is charged.

In addition, the magnetic material (differentially sintered ore) transferred to the secondary electrode-magnetic roll 132b without being adhered by the primary electrode-magnetic roll 132a is the magnetic region M of the secondary electrode-magnetic roll 132b. ) Is attached to the surface of the rotary roll (1323), is separated in the non-magnetic region (N) and is charged to the top of the raw material layer of the sintered trolley (200).

Here, in order to effectively attach the powdered coke and the finely sintered ore (magnetized raw material) to the surface of the rotary roll 1323 of the electrode- magnetic rolls 132a and 132b, the rotational speed of the rotary roll 1323 is higher than the feed rate of the raw material 1. Is small is good. That is, when the rotary roll 1323 rotates faster than the feed rate of the raw material 1, the amount of powdered coke and finely sintered ore adhering to the surface of the rotary roll 1323 is very small, and segregation efficiency may be lowered. Therefore, the segregation efficiency of the raw material 1 charged in the sintering trolley 130 can be improved by controlling the rotational speed of the rotary roll 1323 to be slower than the feed speed of the raw material 1. And when the conveyance speed of the compounding raw material 1 is too fast, the feed rate of the compounding raw material 1 can also be reduced by rotating the rotating roll 1323 in the direction opposite to the conveying direction of the compounding raw material 1.

As described above, in the detailed description of the present invention, specific embodiments have been described. However, various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.

The raw material charging device and the charging method according to the present invention can increase segregation charging efficiency of the raw material charged into the moving sintering cart and can improve the air permeability of the raw material layer. Therefore, the quality and productivity of sintered ore can be improved.

Claims (21)

1. A raw material charging apparatus comprising a raw material supply unit for supplying a raw material and a charging chute for transferring the raw material supplied from the raw material supply unit to a reservoir,

   The charging chute is a charging device of the raw material is the feed path of the raw material is formed in a curved surface of the cycloid curve form.
2. A raw material charging apparatus comprising a raw material supply unit for supplying a raw material and a charging chute for transferring the raw material supplied from the raw material supply unit to a reservoir,

   The charging chute is a charging device of the raw material is the feed path of the raw material is formed into a curved surface of the prolate cycloid curve.
3. A raw material charging apparatus comprising a raw material supply unit for supplying a raw material and a charging chute for transferring the raw material supplied from the raw material supply unit to a reservoir,

   The charging chute has a plurality of rolls arranged side by side to form a feed path of the raw material, the central axis of the plurality of rolls is located in the prolate cycloid curve, the transfer path of the raw material formed on the plurality of rolls is a cycloid curve Filling device of the raw material is formed into a curved surface.
4. The method according to any one of claims 1 to 3,

   And an incidence angle formed by the portion in which the raw material is introduced into the vertical direction in the charging chute is smaller than an escape angle formed by the portion in which the raw material is discharged into the horizontal direction.
5. The method according to claim 4,

   The incident angle is 5 to 50 °, the escape angle is 10 to 60 ° charging device of the raw material.
6. The method according to claim 3,

   And the plurality of rolls are arranged to continuously increase in diameter from top to bottom of the charging chute.
7. The method according to any one of claims 1 to 3,

   The charging chute is a plurality of rolls arranged side by side to form a feed path of the raw material,

   The plurality of rolls comprises at least a portion of an electrode-magnetic roll that is at least partially charged and at least partially magnetic;

   The electrode-magnetic roll of the raw material including a fixed roll that does not rotate, a rotating roll surrounding the outside of the fixed roll and rotated along the outer circumferential surface of the fixed roll, and an electrode plate and a magnetic body disposed on at least a portion of the fixed roll. Charging device.
8. The method according to claim 7,

   The magnetic material is a charging device of the raw material is provided in the portion corresponding to the transfer path to the raw material is transferred.
9. The method according to claim 8,

   And the magnetic body is disposed so as to be biased to an adjacent magnetic roll located in the advancing direction of the raw material.
10. The method according to claim 9,

    The magnetic material is a charging device of the raw material is formed in the 110 ° to 150 ° region relative to the center of the fixing roll.
11. The method according to claim 7,

    The raw material supply unit includes a charging device for charging the raw material,

    The electrode-magnetic roll forms a charged region having the same polarity as that of the raw material on a transfer path adjacent to the raw material supply part, and a plurality of 1s forming a charged region having a polarity opposite to the raw material under the transfer path. Secondary electrode-magnetic roll,

    And a plurality of secondary electrode-magnetic rolls forming a charged region having a polarity opposite to a charged region having the same polarity as said raw material on a transport path adjacent to said reservoir.
12. The method according to claim 11,

    The charging device of the raw material in which the electrode plates having different polarities are spaced apart from each other on the fixed roll.
13. The method according to claim 12,

    The electrode plate is a charging device of the raw material provided to at least partially overlap with the magnetic material.
14. The method according to claim 13,

    And the secondary electrode-magnetic roll has a charging region having a polarity opposite to that of the raw material in a direction in which the raw material is transferred.
15. The method according to claim 7,

    The fixing roll is a charging device of the raw material containing an electromagnetic insulator.
16. The method according to claim 7,

    At least one of the fixing roll, the electrode plate and the magnetic body is provided with a raw material charging device provided with an electromagnetic insulator.
17. As a charging method of raw materials,

    Preparing a raw material;

    Supplying the raw material to a charging chute; And

    Transferring the raw material supplied to the charging chute into a path of a cycloid curve shape and charging it into a reservoir;

    Charging method of a raw material comprising a.
18. The method according to claim 17,

    The charging method of the raw material to the surface of the raw material layer surface of the charging chute in the process of charging to the reservoir to form a track of the cycloid curve.
19. The method according to claim 17,

    In the process of supplying the raw material to the charging chute,

    A method of charging a raw material, wherein the raw material is supplied to a charging chute of a prolate cycloid curve type, and the raw material supplied to the charging chute is transferred to a storage path of a cycloid curve type and charged into a reservoir.
20. The method according to any one of claims 17 to 19,

    The charging method of the raw material is released from the charging chute in the process of charging the raw material has a horizontal release rate greater than the vertical release rate.
21. The method according to any one of claims 17 to 19,

    In the process of transferring the raw material supplied to the charging chute in the path of the cycloid curve form and charging in the reservoir,

    A charging method of a raw material for selecting a raw material having a small particle from the raw material by using the charge characteristics and magnetic properties of the raw material and charging the upper portion of the raw material layer formed in the reservoir.

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