KR101977356B1 - Charging apparatus for raw material - Google Patents

Abstract

The present invention relates to a charging apparatus for a raw material, which comprises: a raw material hopper providing a space in which a raw material is stored, and having an outlet to discharge the raw material; a drum feeder provided to rotate in a lower portion of the raw material hopper, and having a first area having a first diameter and a second area having a second diameter larger than the first diameter at both sides of the first area; and a charging chute forming a transfer path of the raw material discharged from the raw material hopper. In a sintering process, air volume and flow velocity flowing into an edge area of a sintering trolley are reduced to suppress abrasion of an internal side wall of the sintering trolley.

Description

[0001] Charging apparatus for raw material [

The present invention relates to a raw material charging apparatus, and more particularly, to a raw material charging apparatus capable of suppressing the leakage of air during sintering to improve the life of the sintered bogie and the quality of the sintered ores.

The sintering process is a process of sintering fine iron ores to make them suitable for use in blast furnaces. In this sintering process, minute iron ores, additives and solid fuels (partial coke, anthracite) are placed in a drum mixer and mixed and humidified (raw material weight ratio is about 7 ~ 8% After the surface is ignited by the ignition furnace, air is forcedly sucked from below, and when the sintering of the raw material for sintering proceeds, the sintered ores are produced. The produced sintered ores are cooled in a cooler through a crusher of a light pipe, and classified into granules having a size of 5 to 50 mm which is easy to be charged and reacted in the blast furnace and transferred to the blast furnace.

The air permeability of the raw material layer in the sintered light production process greatly affects the quality of the sintered ores. Therefore, it is common to place large particles in the lower layer of the sintered bogie, and small particles in the upper portion of the sintered bogie (perpendicular segregation zone) when the raw material is charged into the sintered bogie. When the vertical segregation is effectively promoted, the heat quantity unbalance phenomenon in the up-down direction in the sintered bogie is suppressed, while the resistance (air-flow resistance) of the air flowing into the raw material layer in the sintered bogie is lowered and the productivity of the sintered ores is improved.

On the other hand, in the process of manufacturing the sintered ores by sucking the inside of the sintered bogie, a variation in the ventilation resistance occurs in the width direction of the sintered bogie. That is, the ventilation resistance is smaller in the edge regions than in the center in the width direction of the sintered bogie. Therefore, the amount of air flowing into both edges is large at the central portion with respect to the width direction of the sintered bogie, and passes at a high speed. Accordingly, there is a problem that the inner wall of the sintered bogie is worn out, causing a leakage of air during the sintering process and shortening the service life of the sintered bogie.

In addition, in both edge regions of the sintered bogie, a large amount of air does not sufficiently supply oxygen to the raw material layer and passes through the raw material layer. As a result, the amount of unnecessary sintered ores is increased and the strength of the sintered ores is lowered. There is a problem.

KR 1700879 B

The present invention provides a raw material charging apparatus capable of reducing variations in the aeration resistance in a raw material layer.

The present invention provides a raw material charging apparatus capable of suppressing wear of a container and suppressing air leakage during operation.

The present invention provides a raw material charging apparatus capable of improving the quality and productivity of sintered ores.

The raw material charging apparatus according to an embodiment of the present invention includes: a raw hopper in which a space for storing a raw material is provided and an outlet for discharging the raw material is formed; A drum feeder rotatably disposed below the raw hopper, the drum feeder including a first region having a first diameter and a second region having a second diameter larger than the first diameter on both sides of the first region; And a charging chute forming a transfer path of the raw material discharged from the raw hopper.

The second diameter may increase toward the end of the drum feeder.

The second region may include an inclined surface inclined downward toward the first region.

 The inclined surface may be formed in a straight or curved shape.

The inclined surface may have an angle of 30 to 45 with respect to the horizontal plane.

The first region may occupy 40 to 60% of the total length of the drum feeder, and the second region may occupy 20 to 30% of the total length of the drum feeder on both sides of the first region.

The raw hopper may include a gate for adjusting the opening of the discharge port, and a lower surface of the gate may be formed in a shape corresponding to a top surface shape of the drum feeder.

The charging chute may be formed of a swash plate having an area or a roll type including a plurality of rolls arranged in parallel.

The charging chute may include a horizontal portion provided at a central portion with respect to the width direction and an inclined portion provided at both sides of the horizontal portion and inclined downward toward the horizontal portion.

The inclined portion may have a slope equal to or smaller than a slope of the second region.

The raw material charging apparatus according to the embodiment of the present invention can deform the longitudinal cross-sectional shape of the drum feeder that discharges the raw material mixture from the raw material hopper by rotation, thereby inducing segregation in the longitudinal direction of the drum feeder. That is, it is possible to form slopes on both edge regions in the longitudinal direction of the drum feeder, and to move the particles having a relatively large particle size to the center side. Segregation can be induced not only in the depth direction but also in the width direction of the sintered bogie when the blend material is charged into the sintered bogie. Therefore, it is possible to reduce the amount of air flowing into the edge region of the sintering bogie and the flow velocity during the sintering process, so that the inner wall of the sintered bogie can be prevented from being worn. In addition, it is possible to suppress the leakage of air generated in the edge region of the sintered bogie during the sintering process, thereby facilitating sintering throughout the sintered bogie, thereby improving the productivity and quality of the sintered ores.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing an apparatus for manufacturing sintered ores using a raw material charging apparatus according to an embodiment of the present invention; FIG.
2 is a perspective view of a raw material charging apparatus according to an embodiment of the present invention;
3 is a sectional view of the raw material charging apparatus shown in Fig.
4 is a perspective view and a front view of the drum feeder;
5 is a view showing a modification of the drum feeder.
6 is a front view of a raw material hopper provided with a gate.
7 is a front view and a sectional view of a charging chute;
8 is a view showing various modified examples of a charging suit.
9 is a view showing a state in which a raw material is charged into a container using a raw material charging apparatus according to an embodiment of the present invention.

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

The present invention relates to a charging device for charging raw materials containing particles of various densities and sizes into a moving container. The charging device can be applied to separate and charge the raw materials by density and size of the particles in the container. Particularly, raw materials can be charged so as to form grain size segregation along the width direction of the container. Hereinafter, a mixing raw material charging apparatus for charging a mixing raw material used for manufacturing sintered ores to a moving sintering carriage will be described as an example. When the raw material is charged into the sintered bogie using such a compounding material charging device, grain segregation occurs in the width direction of the sintered bogie to suppress the leakage of air generated in both edge regions of the sintered bogie to suppress wear of the sintered bogie, Quality can be improved.

FIG. 2 is a perspective view of a raw material charging apparatus according to an embodiment of the present invention, and FIG. 3 is a cross-sectional view of the raw material charging apparatus shown in FIG. FIG. 6 is a front view of a raw material hopper provided with a gate, FIG. 7 is a front view of the raw material hopper, and FIG. 7 is a cross- And Fig. 8 is a view showing various modifications of the charging chute.

1, the apparatus for producing sinter ores includes a raw material charging apparatus 100 for charging a raw material into a sintering bogie 500 moving along a transfer path 200, A transfer device 400 for transferring a plurality of sintering bogies 500 in the process advancing direction and a sintering bogie 500 disposed at an upper portion of the sintering bogie 500. The sintering bogie 500, An ignition furnace 300 for injecting a flame into the surface layer of the raw material in the sintering bogie 500 and a plurality of windboxes 600 installed on the moving path 200 of the sintering bogie 500 for sucking the inside of the sintering bogie 500 can do.

Here, the movement path 200 of the sintering bogie 500 forms a closed loop such that the sintering bogie 500 rotates in an endless track manner, and the upper side movement path is a sintering zone in which the raw material in the sintering bogie 500 is sintered And the lower side movement path is a rotation section for moving the sintered blanket 500 to which the sintered light is distributed, to the upper side movement path for the sintering process. At this time, the material charging apparatus 100 and the ignition furnace 300 are provided on the upper side movement path, and the wind box 600 is provided on the lower side of the upper side movement path, 500). The sintered light that has been sintered in the sintering bogie 500 is shined in the process of moving the sintering bogie 500 from the upper side movement path to the lower side movement path, 210 are located on the opposite side of the ignition path 300 in the upper side movement path.

The ignition furnace 300 is provided in front of the raw material hopper 120 to supply a sintering raw material into the sintering bogie 500 and supply a flame to the surface layer of the raw material layer to be ignited.

The wind box 600 is provided on the movement path 200 of the sintered bogie, more specifically, below the upper side movement path, and sucks the inside of the sintered bogie 500 moving along the upper side movement path. The wind box 600 may be provided between the ignition furnace 300 and the light-directing portion 210. A blower 720 is installed at the end of the duct 700 to form a negative pressure inside the wind box 600 so that the sintered bogie 500 So that the inside can be sucked. The duct 700 is provided with a dust collector 710 in front of the blower 720 so that impurities in the exhaust gas sucked through the wind box 600 can be filtered and discharged through the chimney 730. The wind box 600 sucks the outside air to ignite the surface of the blend raw material and burn the blend raw material so that the sintered ores can be produced.

Referring to FIGS. 2 and 3, the raw material charging apparatus 100 includes a top light hopper 110 in which upper light is stored in a bottom surface of a sintering bogie, an iron ore, an additive, coke and anthracite A drum feeder 140 rotatably provided at a lower portion of the raw hopper 120 and a raw material hopper 120 which is discharged from the raw hopper 120. The raw material hopper 120 includes a raw material hopper 120, And a charging chute (160) for transferring the sludge into the sintering bogie (500). The iron ores and solid fuels stored in the raw hopper 120 are referred to as blended raw materials and are referred to as a raw material layer after they are discharged from the raw hopper 120 to form a flow or charged into the sintering bogie 500.

The upper light hopper 110 is provided at an upper portion of one side of the upper side movement path of the sintered bogie 500. The upper light hopper 110 is charged with the upper light to prevent the material of the grocery blend formed at the bottom of the sintered bogie 500 from flowing out . The upper light means that sintered ores having a particle size of about 8 to 15 mm are selected from among the sintered ores.

The raw material hopper 120 is provided in front of the upper light hopper 110, that is, the moving path of the sintered bogie 110, to store the raw material for producing the sintered ores. The raw material hopper 120 may have an outlet 122 through which the raw material mixture can be discharged. The discharge port 122 may be formed to extend along the longitudinal direction of the raw hopper 120, for example, in the horizontal direction. For example, the length of the discharge port 122 may be formed to have a length similar to the widthwise length of the sintering carriage 500 or the widthwise length of the charging chute 160. The discharge port 122 is provided with a gate 130 so that the amount of the raw material discharged through the discharge port 122 can be adjusted by controlling the opening degree of the discharge port 122. The gate 130 may be vertically movable in front of the discharge port 122 and may move upward and downward to adjust the opening of the discharge port 122. The gate 130 may be formed to extend along the longitudinal direction of the discharge port 122, or may be divided along the longitudinal direction of the discharge port 122. A detailed description of the gate 130 will be given after a description of the drum feeder 140 will be given.

The drum feeder 140 is rotatably provided at a lower portion of the raw hopper 120 so that the raw material mixture discharged through the discharge port 122 can be discharged to the charging chute 160. The drum feeder 140 may be disposed along the longitudinal direction of the discharge port 122 to uniformly discharge the blended raw material discharged through the discharge port 122 along the width direction of the charging chute 160. In addition, the drum feeder 140 can regulate the amount of the raw material to be charged into the sintering bogie 500 by controlling the dispensing amount of the raw material mixture according to the rotational speed. For example, as the speed of the drum feeder 140 increases, the amount of the blend material discharged to the charging chute 160 increases, and consequently the amount of the blending material to be charged into the sintering carriage 500 can be increased.

Meanwhile, the drum feeder according to the related art can be formed into a cylindrical shape having a constant diameter. In this case, the drum feeder can be discharged to the charging chute 160 after the raw material mixture is discharged from the discharge port 122. That is, the drum feeder discharges the raw materials of various particle sizes along the longitudinal direction, for example, the width direction of the charging chute 160, into the charging chute 160 in a uniformly mixed state. However, the drum feeder 140 according to the embodiment of the present invention may have an inclined surface at least in part along the longitudinal direction so that the longitudinal direction of the drum feeder 140, for example, Segregation can be promoted in the width direction of the cylinder 500.

4, the drum feeder 140 includes a first region A having a first diameter d1 and a second region d2 having a larger diameter than the first diameter d1 on both sides of the first region A, (B) having a second region (B). At this time, the second diameter d2 is not limited to one value but may be a plurality of values, and may have a value increasing toward both ends of the drum feeder 140. [ Accordingly, slopes inclined downward toward the first region A may be formed on both edges of the drum feeder 140, that is, the second region B. The inclined surface may be formed in a linear shape as shown in FIG. 4, or may be formed in a curved shape having a curvature in the longitudinal direction of the drum feeder 140, as shown in FIG.

The angle a of the slope formed in the second region B of the drum feeder 140 may be about 30 to 45 degrees with respect to the horizontal plane. More preferably about 35 to 40 DEG. If the angle a of the inclined plane is smaller than the suggested range, segregation in the longitudinal direction of the drum feeder 140 may not be achieved properly. If the angle a of the inclined plane is larger than the predetermined range, most of the blended material discharged into the second region B is moved to the center portion of the drum feeder 140, that is, the first region A, So that there is a problem that the raw material mixture is not uniformly charged in the width direction of the sintered bogie 500. In addition, since a large amount of raw material having a large particle size flows into the first region A, and the raw material having a large particle size is charged intensively in the center of the sintering bogie 500, the flow resistance during sintering is greatly reduced, The problem may not be solved.

The first region A may occupy 40 to 60% of the total length L of the drum feeder 140 and the second region B may occupy 20 to 30% %. At this time, if the area occupied by the second area B is smaller than the suggested range, the length of the inclined surface formed in the second area B may be too short to be segregated. When the range occupied by the second region B is larger than the range shown in the drawing, the blending material discharged into the second region B is concentrated too much in the first region A, There is a problem in that the charging amount of the battery is concentrated.

With such a structure, the drum feeder 140 can move the raw material having a relatively large particle size out of the blended raw materials discharged to the second region B toward the first region A side. That is, in the case of raw materials having the same specific gravity, if raw materials having different particle sizes are moved along the slope, raw materials having larger particle sizes can move faster and move farther than raw materials having smaller grain sizes. By using this principle, a slope is formed in the second region B of the drum feeder 140, and a raw material having a relatively large particle size among the blended raw materials discharged into the second region B is discharged to the center portion of the drum feeder 140 That is, the first region A, and the raw material having a relatively small particle size can be positioned in both edge regions of the drum feeder 140, that is, in the second region B.

When the mixing material is charged into the sintering bogie 500 through the charge chute 160 after the segregation is primarily promoted by the drum feeder 140, the center of the sintering bogie 500 has a relatively large particle size The raw material is charged, and the raw material having a relatively small particle size may be charged in the both edge regions. When the compounding material is charged in the sintering bogie 500 in this pattern, the ventilation resistance decreases at the central portion in the width direction of the sintering bogie 500 compared with the prior art, The resistance is increased. This reduces the amount of air flowing into both edge regions of the sintered bogie 500 during sintering and reduces the flow rate, thereby suppressing the inner wall of the sintered bogie 500 from being worn. In addition, it is possible to suppress the rusting which may occur due to the inner wall wear of the sintered bogie 500, thereby improving the production amount and quality of the sintered ores.

As the shape of the drum feeder 140 is changed, some of the blended raw materials discharged into the second region B move to the first region A. [ Accordingly, it is possible to uniformly dispense the raw material mixture in the width direction of the charging chute 160 by controlling the amount of the raw material mixture discharged into the first region A and the second region B, respectively.

The opening of the discharge port 122 of the raw hopper 120 may be controlled by using the gate 130 to increase the amount of the mixed raw material discharged into the second region B from the first region A. [ The discharge port 122 of the raw material hopper 120 is formed in a rectangular shape extending in the longitudinal direction of the drum feeder 140 and the gate 130 is formed in a shape corresponding to the shape of the discharge port 122, 130 move in the vertical direction in front of the discharge port 122 and can adjust the opening of the discharge port 122. In this case, the compounding material can be uniformly discharged in the extending direction of the discharge port 122, for example, in the longitudinal direction. However, in the present invention, the lower surface of the gate 130 is formed to have a shape corresponding to the upper surface of the drum feeder 140, so that a larger amount of the gate 130 is formed in the second region B than the first region A of the drum feeder 140 Can be discharged.

6, the gate 130 is formed such that the central portion C corresponding to the first region A of the drum feeder 140 is flat and corresponds to the second region B of the drum feeder 140 Both edge regions can be formed so as to be inclined upward toward the outside. At this time, both edge regions of the gate 130 may be formed to have the same or similar angle (b) as the inclination of the inclined surface formed in the second region B of the drum feeder 140. A relatively large amount of the raw material can be discharged from the discharge port 122 in the region corresponding to the second region B than the region corresponding to the first region A of the drum feeder 140 .

The compounding material discharged through the drum feeder 140 may be discharged to the charging chute 160 through the guide chute 150 provided at the lower portion of the drum feeder 140.

The charging chute 160 can charge the compounding material uniformly without segregation in the width direction of the sintering carriage 500 and load the particles in the sintering vehicle in the depth direction of the sintering carriage so as to decrease the particle size from the bottom to the top.

The charging chute 160 may be formed of a plate-shaped swash plate having an area as shown in Figs. 8A and 8B, and as shown in Fig. 8C, To form a transport path of the raw material on the upper surface thereof. At this time, the feed path of the raw material formed in the charging chute 300 may be formed in a linear shape or a curved shape along the direction in which the raw material is conveyed, that is, along the length direction of the charging chute 300.

When the charging chute 300 has a curved conveying path, the charging chute 300 can form a conveying path in the form of a cycloid curve on the upper surface to which the forming material is conveyed. The cycloid curve is formed so that the conveying route of the blend material is formed to have the shortest falling curve so that the horizontal departure speed of the blended material charged into the sintering bogie 400 through the charging chute 300 is increased, Can be improved. In other words, since the raw material having a larger particle size among the blended raw materials fed along the upper part of the charging chute 300 has a larger weight than the raw material having a smaller particle size, the horizontal discharging speed of the charging chute 300 increases and the falling distance increases . Therefore, the raw material having a large grain size is loaded on the lower side of the moving sintering carriage 400, and the raw material having a small grain size is loaded on the upper side of the raw material having a large grain size, and vertical segregation is performed.

The charging chute 160 may be configured to hold the segregated primary stone from the drum feeder 140 to the sintering bogie 500 or to transfer the raw material mixture to the sintering bogie 500 in the width direction of the charging chute 500 It is possible to promote segregation secondarily.

7 (a) and 7 (b), the charging chute 160 includes a horizontal portion X provided at a central portion with respect to the width direction of the charging chute 160 and a horizontal portion X provided at both sides of the horizontal portion X And an inclined portion Y which is provided on the lower portion and slopes downward toward the horizontal portion. The horizontal portion X may be formed at a position corresponding to the first region A of the drum feeder 140 and the inclined portion Y may be formed at a position corresponding to the second region B, (Y) may be formed to be inclined in the longitudinal direction of the charging chute 160, that is, in a direction intersecting with the direction in which the compounding material is conveyed.

The inclined portion Y of the charging chute 160 moves particles of a relatively large particle size among the materials to be mixed into the horizontal portion X while transferring the mixing material to the sintering carriage 500, Segregation can be encouraged.

7 (b) is a cross-sectional view taken along the line Z-Z 'in Fig. 7 (a). 7B, the inclined portion Y may be formed so as to be inclined downward toward the horizontal portion X, and the inclination c of the inclined portion Y is inclined toward the inclined portion Y of the second region B, Lt; RTI ID = 0.0 > and / or < / RTI > This is to maintain the segregated state until the mixed raw material is fed along the charging chute 160 and segregated along the width direction of the charging chute 160 and charged into the sintering carriage 500.

FIG. 9 is a view showing a state where a raw material is charged into a container using a raw material charging apparatus according to an embodiment of the present invention. FIG.

9, the blended raw materials discharged from the raw hopper 100 are discharged to the charging chute 160 through the guide chute 150 via the drum feeder 140. [

The compounding material is primarily segregated in the drum feeder 140 and then discharged to the charging chute 160. At this time, the raw material having a large particle size among the blended raw materials discharged to the second region B of the drum feeder 140 moves to the first region A along the inclined surface formed in the second region B, And the raw material having a small particle size is discharged to the charging chute 160 from the second region B.

The blended raw material passing through the first region A of the drum feeder 140 is discharged to the horizontal portion X of the charging chute 160 and the blended raw material passing through the second region B is discharged to the horizontal portion X of the charging chute 160. [ And is discharged to the inclined portion (Y). The blended raw materials dispensed into the charging chute 160 may be transferred along the upper surface of the charging chute 160 and charged into the sintering carriage 500. At this time, while the blended raw material is being conveyed along the charging chute 160, a raw material having a large particle size among the blended raw materials conveyed along the inclined portion Y may move to the horizontal portion X side and may be secondaryly segregated .

The blended raw materials transferred along the charging chute 160 can be charged in the sintering bogie 500 while being segregated in the width direction and the height direction of the sintering bogie 500. That is, a raw material having a relatively large particle size is loaded on the center side in the width direction of the sintered bogie 500, and a raw material having a relatively small particle size is loaded on the both edge regions, thereby achieving horizontal segregation. In addition, the raw material having a relatively large particle size is loaded in the lower side in the depth direction of the sintered bogie 500, and the raw material having a relatively small particle size is loaded in the upper side, so that the vertical segregation can be achieved.

When the compounding material is charged into the sintering bogie 500 as described above, the particle size of the raw material gradually decreases from the lower portion to the upper portion of the sintering bogie 500, and the grain size of the raw material particles gradually increases from the center portion in the width direction of the sintering bogie 500 to the edge side The size decreases gradually. Since the ventilation resistance is increased in both edge regions of the sintered bogie 500 in the width direction of the sintered bogie 500, it is possible to suppress the rusting that may occur in both edge regions of the sintered bogie 500, Can be suppressed from being worn.

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.

100: Material charging device 110: Top light hopper
120: Raw hopper 130: Gate
140: Drum feeder 150: Guide chute
160: Charging suit

Claims (10)

A raw material hopper for providing a space for storing the raw material and forming an outlet for discharging the raw material;
A drum feeder rotatably disposed below the raw hopper, the drum feeder including a first region having a first diameter and a second region having a second diameter larger than the first diameter on both sides of the first region; And
And a charging chute forming a transfer path of the raw material discharged from the raw hopper,
And the second diameter increases toward the end of the drum feeder. delete A raw material hopper for providing a space for storing the raw material and forming an outlet for discharging the raw material;
A drum feeder rotatably disposed below the raw hopper, the drum feeder including a first region having a first diameter and a second region having a second diameter larger than the first diameter on both sides of the first region; And
And a charging chute forming a transfer path of the raw material discharged from the raw hopper,
And the second region includes an inclined surface inclined downward toward the first region. The method of claim 3,
Wherein the inclined surface is formed in a straight or curved shape. The method of claim 3,
Wherein the inclined surface has an angle of 30 to 45 with respect to a horizontal plane. The method according to claim 1 or 3,
Wherein the first region occupies 40 to 60% of the entire length of the drum feeder,
And the second region occupies 20 to 30% of the total length of the drum feeder on both sides of the first region. The method according to claim 1 or 3,
Wherein the raw hopper includes a gate for regulating the opening of the discharge port,
Wherein a lower surface of the gate is formed in a shape corresponding to a top surface shape of the drum feeder. The method according to claim 1 or 3,
Wherein the charging chute is formed of a swash plate having an area or formed of a roll type including a plurality of rolls arranged in parallel. The method of claim 8,
Wherein the charging chute includes a horizontal portion provided at a central portion with respect to a width direction and an inclined portion provided at both sides of the horizontal portion and inclined downward toward the horizontal portion. The method of claim 9,
The inclined portion,
And has a slope equal to or smaller than the slope of the second region.

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