KR20140013365A - Charging apparatus for raw material and the method thereof - Google Patents

Abstract

The present invention relates to a raw material charging apparatus and a charging method. A raw material charging method comprises: a raw material preparing step; and a step for supplying the raw material to a charging chute for forming a transferring path by multiple rolls; and a step for charging the raw material, which is supplied to the charging chute, into storage. In the step for supplying the raw material to the charging chute, a part of the raw material is charged. The charged raw material is transferred along the transferring path, and the charged raw material is attached to a surface of a roll due to attraction in an area having polarity, which is opposite to the charged raw material. Therefore, the charged raw material is charged in the storage through space between the rolls, and segregation efficiency can be improved by efficiently sorting a material (coke powder), which is charged among materials.

Description

Charging apparatus for raw material and the method

The present invention relates to a charging apparatus and a charging method of the raw material, and more particularly to a charging method and a charging method of the raw material that can effectively select the charged raw material (powder coke) of the raw material to improve segregation efficiency.

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 charging device is a sintered raw material (1) containing finely divided iron ore such as magnetite (Fe ₃ O ₄ ) and hematite (Fe ₂ O ₃ ) as main raw materials, limestone and serpentine, silica sand and quicklime as raw materials and powdered coke (1) The raw material supply part which consists of the stored sintering raw material hopper (2) and the dream feeder (3) which supplies this sintering raw material to the lower part through the hopper gate (4) of the sintering raw material hopper by the rotation, and the sintering raw material which are supplied It consists of the chute 10 which charges the bottom light currently spread | diffused in (8). The chute 10 is composed of the inclined plate 11 serves to classify the sintered raw material so that small particles at the top of the sintered cart 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 (vertical segregation bath). 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 a 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 into segregation of the sintered raw material on the top of the raw material layer in the sintered trolley. Deterioration of the environment, or additional equipment must be installed separately, so the cost of the facility is increased, the maintenance is also difficult.

JP 2003-105449 A JP 2003-49229 A JP 2002-130957 A JP 2001-335849 A

The present invention provides a charging apparatus and a charging method of a raw material which can improve the segregation degree of the charged raw material by reducing the amount of powdered coke at the top of the raw material layer, and can reduce the upper caloric shortage phenomenon and improve breathability.

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

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

In the raw material charging device according to the embodiment of the present invention, a raw material supply unit for supplying a raw material and a plurality of rolls are arranged side by side to form a transfer path of the raw material to transfer the raw material supplied from the raw material supply unit to a storage device. An apparatus for charging a raw material including a chute, wherein some of the plurality of rolls include a charged electrode roll, wherein the electrode roll comprises a stationary roll that does not rotate, and an outer circumferential surface of the stationary roll that surrounds the outside of the stationary roll. And an electrode plate disposed on at least a portion of the rotating roll rotating along the fixing roll.

The fixing roll may be formed of an insulator, and when the fixing roll is formed of a conductor, an insulator may be provided between the fixing roll and the electrode plate.

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

The raw material supply unit includes a charging device for charging the raw material, wherein the plurality of electrode rolls form a charge region having the same polarity as the raw material on a transfer path adjacent to the raw material supply unit, and the lower portion of the transfer path A plurality of primary electrode rolls forming a charged region having a polarity opposite to that of the raw material, and a plurality of forming 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 also include a secondary electrode roll.

The secondary electrode 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 plurality of electrode rolls may be spaced apart from 5 to 8mm.

A scraper may be disposed below the electrode roll.

The charging method of the raw material which concerns on embodiment of this invention is a charging method of a raw material, Comprising: Preparing a raw material; Supplying the raw material to a charging chute forming a transfer path by a plurality of rolls; And charging the raw material supplied to the charging chute into a storage device, wherein the raw material is charged in the process of supplying the raw material to the charging chute, and the charged raw material is transferred along the transfer path. It is characterized in that it is charged to the reservoir by being attached to the roll surface by the attraction force in the region having a polarity opposite to the charged raw material and discharged into the space between the rolls.

The charged raw material may be charged over the raw material layer of the reservoir.

Rolls installed in at least some sections of the transport path may rotate at a speed smaller than the transport speed of the raw material.

In the charging process, the scraper disposed under the roll may contact the outer circumferential surface of the roll to separate the raw material attached to the surface of the roll.

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

The charging apparatus and charging method of the raw material according to the embodiment of the present invention can improve segregation efficiency of the raw material charged into the reservoir without affecting the flow of the raw material. That is, in the charging chute consisting of a plurality of rolls, an electrode is formed on a part of the roll, and the powdered coke contained in the raw material is charged into the reservoir through the space formed between the rolls using electric attraction force and repulsive force, without disturbing the flow of the raw material. Segregation efficiency can be improved. Thereby, segregation degree of the raw material charged in the moving sintering trolley | bogie can be improved. In addition, the segregation of the raw material can be improved to improve the air permeability in the raw material layer, and can improve the quality and productivity of the sintered ore produced by supplementing the heat shortage phenomenon in the upper part of the raw material layer.

And since the roll is configured to separate the fixed roll and the rotary roll, it is easy to maintain because any one of them can be removed to repair and repair only the damaged part. In addition, since the electrode is connected to the fixed roll, the wiring for applying power to the electrode 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 sintering raw material charging device.
2 is a view schematically showing a raw material charging device according to an embodiment of the present invention.
3 is a view schematically showing a raw material supply unit of a raw material charging device according to an embodiment of the present invention.
4 is a view schematically showing a charging chute of the raw material charging device according to an embodiment of the present invention.
5 is a view showing the structure of the electrode roll.
6 and 7 are views for explaining the arrangement of the electrodes.
8 is a view showing a transfer state of the raw material conveyed along the charging chute.

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

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 is a view schematically showing a raw material charging device according to an embodiment of the present invention, Figure 3 is a view schematically showing a raw material supply unit of the raw material charging device according to an embodiment of the present invention, Figure 4 is the present invention Figure is a diagram schematically showing a charging chute of the raw material charging device according to the embodiment. 5 is a view showing the structure of the electrode roll, Figures 6 and 7 are views for explaining the arrangement of the electrode.

The raw material charging device includes a raw material supply unit including a raw material hopper 2 and a drum feeder 3 and a charging chute 100.

The raw material hopper 2 supplies the compounding raw materials 1, such as fine iron ore, secondary raw materials, and fine powder coke, to the drum feeder 3 via the hopper gate 4, and the drum feeder 3 is rotated and fed into the blending. The raw material 1 is mixed and supplied to the charging chute 100.

Referring to FIG. 3, at least one of the raw material hopper 2, the drum feeder 3, and the hopper gate 4 is provided with electrode plates 2a, 3a, 4a, and is supplied to the charging chute 100. Charge (1). For example, the electrode plates 2a, 3a, and 4b may be a cathode or an anode, and all of them may be formed of the same kind of electrode. Therefore, the powder coke in the compounding material 1 may be formed by the electrode plates 2a, 3a, and 4a. It is negatively or positively charged. The powdered coke is supplied to the charging chute 100 in a charged state.

The charging chute 100 is a reservoir for storing the compounding material 1 by forming an inclined surface, that is, the raw material 1 so that the small particles in the upper portion of the sintering cart 130 and the large particles in the lower portion thereof (charging vertical segregation). It serves to classify. When the raw material is charged to the sintered trolley 130, the surface of the raw material is evenly made by the surface of the flat plate 110 to ignite in the ignition furnace 120, 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. 4, the charging chute 100 may be formed by arranging the plurality of rollers 102 and 103 side by side. The charging chute 100 has a straight or curved transport path having an area, and charges the blended raw material 1 into the sintering cart 130 through the transport path.

The charging chute 100 includes electrode rolls 102 and 103 in which electrode plates 106a, 106b, 106c, and 106d are formed at least in part of the rollers 102 and 103.

In the charging chute 100, a plurality of primary electrode rolls 102 are disposed on the drum feeder 3 side, that is, the upper side, to which the compounding material 1 is supplied, and the sintering cart 130 into which the compounding material 1 is charged. On the side, that is, the lower side, a plurality of secondary electrode rolls 103 are disposed. In addition, a scraper 104 may be provided below the primary electrode roll 102 and the secondary electrode roll 103 to remove powdered coke attached to the surface of the electrode rolls 102 and 103 and to charge the sintering cart 130. Can be. The scraper 104 is formed in the form of a plate (plate) is formed along the longitudinal direction of the electrode rolls (102, 103), the end may be provided to contact the outer peripheral surface of the electrode roll (102, 103).

The electrode rolls 102 and 103 are fixed to the fixed roll 105 installed in a fixed state, and formed in a hollow cylindrical shape to surround the outer circumferential surface of the fixed roll 105, and rotates along the outer circumferential surface of the fixed roll 105. Rotating rolls 107 and electrode rolls 106a and 106b disposed between the fixed roll 105 and the rotating rolls 107. At this time, the fixed roll 105 and the rotary roll 107 is connected through the connecting means 108 such as a bearing in a state in which the outer peripheral surface of the fixed roll 105 and the inner peripheral surface of the rotary roll 107 are separated, and the rotary roll ( 107 can be rotated without mutual friction with the fixing roll (105). The electrode rolls 102 and 103 are charged using the repulsive force generated between the materials having the same polarity and the attractive force generated between the materials having the opposite polarity. It serves to screen the coke into the space between the electrode rolls (102, 103).

The electrode plates 106a, 106b, 106c, and 106d may be a positive electrode (+) and a negative electrode (−), respectively, and regions charged with different charges coexist in one electrode roll 102 and 103. At this time, the fixing roll 105 may be formed of an insulator, and the two electrode plates 106a and 106b or 106c and 106d are spaced apart from each other and are formed along the length direction of the fixing roll 105, respectively. The electrode plates 106a, 106b, 106c, and 106d may be attached to the surface of the fixing roll 105, or may be formed to form a groove having a predetermined depth in the fixing roll 105 and be inserted into the groove. Herein, the electrode provided in the electrode rolls 102 and 103 is described as being formed in a plate shape, but the form thereof is not limited thereto. If the fixing roll 105 is not an insulator, the current is supplied between the electrode plates 106a, 106b, 106c, and 106d through a separate insulator between the fixing roll 105 and the electrode plates 106a, 106b, 106c, and 106d. It can also prevent. For example, a positive charge region X charged with a positive charge is formed in a region where an anode is disposed in the rotary roll 107, and a negative charge region Y charged with a negative charge is formed in an region where a cathode is disposed, and an electrode plate ( A non-charge region Z having no positive or negative charge may be formed between the positive charge region X and the negative charge region Y in which the 106a, 106b, 106c, and 106d are not formed. Each of the regions X, Y, and Z is formed along the longitudinal direction of the electrode rolls 102 and 103. Hereinafter, for convenience of description, the X area is called a positive charge area, and the Y area is called a negative charge area.

The electrode plates 106a, 106b, 106c, and 106d are fixed in order to charge the powdered coke contained in the blended raw material 1 into the upper portion of the raw material layer of the sintered cart 130 using the electrode rolls 102 and 103 configured as described above. It is important to place it in the proper position of the roll 105.

Referring to FIG. 6, a first electrode plate 106a having the same polarity as that of the powdered coke charged in the raw material supply part is formed on the upper side to which the blended raw material is transferred from the primary electrode roll 102, and the lower side opposes the powdered coke. The second electrode plate 106b having a polarity of may be formed.

The first electrode plate 106a serves to increase the charge of the charged coke among the powdered coke supplied from the raw material supply unit, and at the same time, to charge the uncharged powdered coke. The first electrode plate 106a is formed on the imaginary line S (which may be formed in parallel with the transfer path) formed by connecting the centers of the plurality of primary electrode rolls 102 to the upper portion of the imaginary line S. It may be formed on the 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 106a may be formed within a range θ of about 110 to 150 degrees from the center of the fixing roll 105.

The second electrode plate 106b attaches the powdered coke charged by the first electrode plate 106a to the surface of the primary electrode roll 102 by attraction and discharges it into the space between the primary electrode rolls 102. It serves to charge the upper portion of the raw material layer of the sintered trolley 103. At this time, the powdered coke attached to the primary electrode roll 102 is removed by contacting the scraper 104 provided at the lower portion as the primary electrode roll 102 rotates, or the non-charge region Z where no electrode plate is formed. ) May be removed from the surface of the primary electrode roll 102 by the repulsive force acting in the positively charged region (X). The second electrode plate 106b may be formed below the virtual line by being spaced apart from the first electrode plate 106a by a predetermined distance with respect to the virtual line. In FIG. 6, although the second electrode plate 106b is formed to have a shorter length than the first electrode plate 106a, the second electrode plate 106b may be formed to have the same or longer length when mutual interference with adjacent electrode plates does not occur.

The secondary electrode roll 103 is not discharged between the primary electrode rolls 102 and the secondary electrode rolls 103 are formed by using an electric attraction to the powdered coke conveyed along the transfer path formed by the primary electrode roll 102. It acts as a screen to discharge between. Accordingly, the third electrode plate 106c and the fourth electrode plate 106d coexist in the transfer path formed by the secondary electrode roll 103. The secondary electrode roll 103 has a third electrode plate 106c 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. The fourth electrode plate 106d having a polarity opposite to that of the charged powdered coke may be provided on the side to separate the powdered coke attached to the surface of the secondary electrode roll 103.

Referring to FIG. 7, the third electrode plate 106c and the fourth electrode plate 106d are spaced apart from each other by a predetermined distance, and may be disposed so as not to interfere with the electrode plates formed on the adjacent electrode rolls 102 and 103. . This can be changed according to the installation conditions of the various charging chute, such as the diameter of the electrode roll, the separation distance. The positive charge region X formed by the third electrode plate 106c in the secondary electrode roll 103 serves to charge the powdered coke among the blended raw materials transferred along the primary electrode roll 102. The negatively charged region Y formed by the electrode plate 106d serves to attach the charged powder coke to the surface of the secondary electrode roll 103, that is, the surface of the rotary roll 107, using attraction force. As described above, the attraction force, which is the pulling force, acts between the materials having different polarities, so that the negative coke is attached to the surface of the rotary roll 107 in the negatively charged region Y charged with the opposite polarity of the charged coke. The coke attached to the surface of the rotary roll 107 is moved to the lower side of the transfer path through the space between the secondary electrode roll 103 as the rotary roll 107 rotates. The powdered coke moved to the lower side of the transfer path is removed from the surface of the rotary roll 107 by the scraper 104 provided on the lower side of the secondary electrode roll 103 to be charged into the raw material layer of the sintered trolley 130.

Through such a configuration, the electrode rolls 102 and 103 serve as screens for sorting powdered coke from the compounding raw material 1 conveyed along the charging chute 100. That is, the charging chute 100 is formed of an electrode roll having an electrode plate, so that the powdered coke is charged and conveyed from the blended raw material supplied from the raw material supply unit, and the powdered coke is sintered using the electrical attraction in the transferring process. It can be charged in the upper portion of the raw material layer.

At this time, the distance t between the electrode rolls 102 and 103 may be set such that the charged powder coke attached to the outer circumferential surfaces of the electrode rolls 102 and 103 does not contact the outer circumferential surfaces of the adjacent electrode rolls 102 and 103. Usually, the spacing between the general rolls is about 3 to 5 mm, and the interval t between the electrode rolls 102 and 103 is set to about 5 to 8 mm which is slightly larger than the spacing between the general rolls, so that the outer circumferential surfaces of the electrode rolls 102 and 103 are different. It is possible to smooth the movement of the powder coke attached to the. At this time, when the distance t of the electrode rolls 102 and 103 is smaller than the suggested range, it is difficult for the coke attached to the outer circumferential surfaces of the electrode rolls 102 and 103 to move to the space between the electrode rolls 102 and 103. In the case of larger than the range, the raw material having a larger particle size in addition to the powdered coke exits between the electrode rolls 102 and 103 and is charged to the upper portion of the raw material layer in the sintered trolley 130 to reduce segregation efficiency.

Here, the case where the electrode rolls 102 and 103 are arranged to form a linear transfer path is described. However, when the electrode rolls 102 and 103 are arranged to form a curved transfer path such as a cycloid, the electrode The distance between the rolls 102 and 103, the formation ranges of the electrode plates 106a, 106b, 106c, and 106d may be variously changed.

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

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

Referring to FIG. 8, when the prepared blending raw material 1 is supplied to the charging chute 100 through the drum feeder 3, the blending raw material 1 moves along the transfer path formed in the charging chute 100 to sinter. It is charged to the cart 130. At this time, the powdered coke of the blended raw material 1 supplied to the charging chute 100 is formed by the electrode plates 2a, 3a, 4a formed in the raw material hopper 2, the drum feeder 3 and the hopper gate 4. It is charged to the cathode or anode.

The blended raw material 1 supplied to the charging chute 100 is classified in a slope on the transfer path, and thus raw materials having a small particle size, such as powdered coke and feldspar, are located in the upper portion of the transfer path and have a larger particle size such as secondary raw materials. This position is transported. In the blended raw material 1, the powdered coke charged in the raw material supply part increases while the powdered coke charged along the transfer path (upper side of the charging chute) formed by the primary electrode roll 102 increases the charge amount. The uncoiled coke at is charged with the same polarity as the coke charged at the feedstock.

Thereafter, while the blended raw material 1 is transferred along the transfer path (lower side of the charging chute) formed by the secondary electrode roll 103, the powdered coke charged by the raw material supply part and the primary electrode roll 102 It is discharged into the space between the secondary electrode rolls 103 by the electric repulsive force and is charged to the upper portion of the raw material layer of the sintered trolley 130. The charged coke in the raw material supply part is attached to and separated from the surface of the electrode rolls 102 and 103 while passing through the charged region having the same polarity as the powdered coke and the charged region having the opposite polarity, and between the electrode rolls 102 and 103. Segregation is charged in the upper part of the raw material layer of the sintered trolley | bogie 130 through the space | interval and the end of the charging chute 100 (sinter trolley | bogie side secondary electrode roll). For example, the powdered coke charged to have a positive charge in the raw material supply part is transported along the transport path formed by the primary electrode roll 102 while the positive charge amount is increased or charged on the transport path. . The positively charged powdered coke is transported along the transport path by the rotation of the primary electrode roll 102, some of which is discharged into the space between the primary electrode rolls 102. At this time, some of the coke discharged between the primary electrode roll 102 is attached to the negative charge region (Y) in the primary electrode roll 102, while the rotary roll 107 of the primary electrode roll 102 is rotated In contact with the scraper 104 provided in the lower portion of the primary electrode roll 102 and is separated from the surface of the primary electrode roll 102 is charged in the upper portion of the raw material layer of the sintering cart (130).

Subsequently, the blended raw material is conveyed along the conveying path formed by the secondary electrode roll 103 and charged into the sintering cart 130. At this time, the charged coke in the blended raw material is attached to the surface of the secondary electrode roll 103 by the attraction force generated by the negative charge region Y having a polarity opposite to that of the coke, and the secondary electrode roll 103. As it rotates, it moves to the lower portion of the transfer path through the space between the secondary electrode rolls 103 and contacts the scraper 104 provided at the lower portion of the secondary electrode rolls 103 so as to be separated from the secondary electrode rolls 103. While being charged in the upper raw material layer of the sintering cart (130).

In order to effectively adhere the powdered coke to the surfaces of the rotary rolls 107 of the electrode rolls 102 and 103, it is preferable that the rotational speed of the rotary roll 107 is smaller than the feed rate of the compounding raw material 1. That is, when the rotary roll 107 rotates faster than the feed rate of the compounding raw material 1, the amount of powdered coke adhering to the surface of the rotary roll 107 becomes very small, and segregation efficiency may fall. Therefore, segregation efficiency of the compounding raw material 1 charged in the sintering trolley 130 can be improved by controlling the rotational speed of the rotary roll 107 to be slower than the feed rate of the compounding 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 107 in the direction opposite to the conveying direction of the compounding raw material 1.

Although the present invention has been described in connection with certain exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Therefore, the scope of the present invention should not be limited by the described embodiments, but should be defined by the appended claims and equivalents thereof.

1: raw material 2: raw material hopper
3: drum feeder 4: hopper gate
10, 100: charging chute 102: primary electrode roll
103: secondary electrode roll 104: scraper
105: fixed roll 106a, 106b, 106c, 106d: electrode plate
107: rotary roll 110: surface pulp plate
120: ignition furnace 130: sintered trolley

Claims (13)

A raw material charging device comprising a raw material supply unit for supplying a raw material and a charging chute for arranging a plurality of rolls side by side to form a transfer path of the raw material and transferring the raw material supplied from the raw material supply unit to a reservoir,
Some of the plurality of rolls include a charged electrode roll,
The electrode roll comprises 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 disposed on at least a portion of the fixed roll. The method according to claim 1,
The fixing roll is a charging device of the raw material formed of an insulator. The method according to claim 1,
A charging device for raw materials, wherein an insulator is provided between the fixed roll and the electrode plate. The method according to claim 2 or 3,
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. The method of claim 4,
The raw material supply unit includes a charging device for charging the raw material,
The plurality of electrode rolls may include a plurality of ones forming a charged region having the same polarity as that of the raw material on a transfer path adjacent to the raw material supply unit, and forming a charged region having a polarity opposite to the raw material under the transfer path. Primary electrode roll,
And a plurality of secondary electrode rolls forming 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. The method according to claim 5,
And the secondary electrode 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. The method according to claim 1,
The electrode roll is a plurality of electrode rolls are arranged 5 to 8 mm apart. The method according to claim 1 or 5,
A device for loading raw materials, wherein a scraper is disposed below the electrode roll. As a charging method of raw materials,
Preparing a raw material;
Supplying the raw material to a charging chute forming a transfer path by a plurality of rolls; And
And charging the raw material supplied to the charging chute into a reservoir.
A part of the raw material is charged in the process of supplying the raw material to the charging chute, and the charged raw material is attached to the roll surface by attraction in an area having a polarity opposite to that of the charged raw material while being transported along the transfer path. Charging method of the raw material to be charged into the reservoir by being discharged into the space between the rolls. The method of claim 9,
The charged raw material is a charging method of the raw material is charged to the top of the raw material layer of the reservoir. The method of claim 9,
The roll installed in at least a portion of the transfer path is a charging method of the raw material to rotate at a speed less than the feed rate of the raw material. The method of claim 9,
And a raw material attached to the surface of the roll by contacting the scraper disposed below the roll with the outer circumferential surface of the roll during charging into the reservoir. The method of claim 9,
The charging method of the raw material is that the raw material is charged from the particles having a high density or size in the process of charging in the reservoir, the charged raw material is disposed above the raw material layer of the reservoir.

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