KR20170047503A

KR20170047503A - Apparatus and Method for Manufacturing Sintered Ore

Info

Publication number: KR20170047503A
Application number: KR1020150147699A
Authority: KR
Inventors: 정병준
Original assignee: 주식회사 포스코
Priority date: 2015-10-23
Filing date: 2015-10-23
Publication date: 2017-05-08
Also published as: KR101749081B1

Abstract

The present invention relates to a sintering method for sintering a raw material for sinter, which comprises a supply unit for supplying a raw material for sintering downward, a bogie disposed below the supply unit and having a space formed therein for loading the raw material for sinter, A plurality of windboxes disposed along the movement path so as to suck air in a lower portion of the bogie; And an adjusting unit which is disposed between the supplying unit and the ignition and is installed in a direction crossing the moving direction of the truck on the moving path so as to control the density of the raw materials for sintering in the truck, The density can be controlled to improve the sintering productivity and the sintering recovery rate.

Description

Technical Field [0001] The present invention relates to a sintering apparatus,

The present invention relates to a sintering apparatus and a sintering method, and more particularly, to a sintering apparatus and a sintering method capable of improving sintering productivity and sintering recovery rate by controlling the density of a raw material in a width direction of a truck.

Generally, the sintering process is a process of producing sintered ores by processing iron ore to facilitate use in a blast furnace. That is, the sintered ores can be produced by mixing iron ore with coke, fuel, limestone, and additives, and then sintering.

This sintering process can be carried out in the following order. First, raw materials mixed with iron ore, fuel, coke, and additives are charged at a constant height to the bogie. Then, when air is forcedly sucked from the lower side after ignition of the upper part of the raw material, sintering of the raw material proceeds to produce sintered ores. Thereafter, the sintered ores having an easy particle size in the blast furnace and the reaction are transferred to the blast furnace, and the sintered ores having a small size are classified as semi-light and used again as raw materials for sintering.

At this time, the raw material may be attached to the charging chute during the charging of the raw material into the carriage using the charging chute. A difference may occur in the amount of the raw material passing through the portion where the raw material of the charging chute is adhered and the amount of the raw material passing through the portion where the raw material is not adhered because the attached raw material interferes with the movement of the other raw material. Therefore, when the raw material is loaded into the carriage using the charging chute in a state where the raw material is attached, the raw material can be uniformly loaded in the width direction.

However, conventionally, it has not been possible to control the uniformity of the raw materials charged into the truck uniformly. Thus, there is a problem that the raw material is sintered in a non-uniform state and the sintering productivity and the sintering recovery rate are lowered.

KR 2004-0056083 A

The present invention provides a sintering apparatus and a sintering method capable of controlling the density of a raw material in a width direction of a bogie.

The present invention provides a sintering apparatus and a sintering method capable of improving sintering productivity and sintering recovery rate.

The present invention provides a sintering apparatus comprising: a supply unit for supplying a raw material for sintering downward; A bogie located below the supply unit and having a space formed therein for loading the raw material for sinter; An ignition means provided on the moving path of the truck for spraying a flame with the sintering raw material in the truck; A plurality of windboxes arranged along the movement path to suck air at a lower portion of the bogie; And an adjustment unit located between the supply unit and the ignition, the adjustment unit being installed in a direction intersecting the moving direction of the bogie on the moving path so as to control the density of the raw materials for sintering in the bogie; .

Wherein the adjustment unit comprises: a plate extending in a direction intersecting the moving direction of the truck; And a driver coupled to the plate to move the plate up and down; .

The adjustment unit further comprises a press roll connected to the lower portion of the plate to press the sinter raw material.

Wherein the plurality of regulating units are disposed in a direction intersecting the moving direction of the truck.

Further comprising a plurality of flow rate measurement units arranged in a direction intersecting the moving direction of the truck so as to measure the air flow rate inside the truck on the moving route, Respectively.

The flow velocity measuring unit is disposed above the wind box.

And a control unit connected to the flow rate measurement unit and controlling operation of the adjustment unit.

The present invention relates to a sintering method for producing sintered ores, comprising the steps of charging a raw material for sinter into a bogie moving along a moving path; A step of igniting the raw material for sinter; A step of sucking air in a lower direction of the raw material for sinter and detecting the density of the raw material for sinter at a plurality of positions in a direction intersecting the moving direction of the car to determine an abnormality; And controlling the density of the sintering raw material in the sintering material when the density of the sintering raw material is abnormal. .

The step of sensing the density of the raw material for sinter may include the step of measuring the flow velocity of the air inside the vessel and estimating the density using the measured flow velocity value.

The step of determining the abnormality may include comparing a minimum value and a remaining value among the flow velocity values measured at a plurality of positions; And determining that the at least one of the remaining values is at least 1.1 times the minimum value.

The process of controlling the density of the raw material for sintering may include pressing the raw material for sinter corresponding to the portion where the flow velocity value measured at a plurality of positions is larger than the minimum flow velocity value.

According to the embodiments of the present invention, it is possible to measure the density of the raw material depending on the position by measuring the flow rate of the air inside the raw material at a plurality of positions. Thus, it is possible to monitor in real time whether the raw material is uniformly charged into the rail during the sintering process.

Further, according to the embodiments of the present invention, the density of the raw material can be adjusted at a plurality of positions in the width direction of the truck. Accordingly, if the density of the raw materials in the bulk carrier is not uniform, it can be controlled so that the density of the raw material becomes uniform in the width direction. Therefore, sintering recovery rate and sintering productivity can be improved by uniformly firing raw materials in the bulk carrier.

1 shows a sintering apparatus according to an embodiment of the present invention.
2 shows a structure of a supply unit and an ignition furnace according to an embodiment of the present invention.
3 is a plan view showing a structure of a control unit, a flow velocity measurement unit, and a control unit according to an embodiment of the present invention.
4 shows the operation of regulating units according to an embodiment of the invention;
5 is a flow chart illustrating a sintering method according to an embodiment of the present invention.
6 is a graph showing the flow rate of air in the conventional sintering raw material and the flow rate of air in the sintering raw material according to the 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. To illustrate the invention in detail, the drawings may be exaggerated and the same reference numbers refer to the same elements in the figures.

FIG. 1 is a view showing a sintering apparatus according to an embodiment of the present invention, FIG. 2 is a view showing a structure of a supply unit and an ignition furnace according to an embodiment of the present invention, and FIG. Unit, a flow velocity measurement unit, and a control unit, and Fig. 4 is a view showing the operation of the adjustment units according to the embodiment of the present invention.

1 to 3, a sintering apparatus according to an embodiment of the present invention includes a supply unit 10 for supplying a raw material for sintering downward, An ignition line 30 provided on the moving path of the bogie 20 to inject a flame into the sintering raw material in the bogie 20 and an air passage A plurality of windboxes 40 disposed along the travel path to draw in the sludge and to control the density of the sintering raw material in the sump 20 and between the supply unit 10 and the firing furnace 30, And an adjusting unit (100) arranged in a direction intersecting with the moving direction of the bogie (20) on the path.

The sintering apparatus further includes a gas discharging unit 50 for discharging the gas sucked from the wind box 40, a flow rate measuring unit 200 for measuring a flow rate of air inside the raw material for sinter and a flow rate measuring unit 200, And a control unit 300 connected to the control unit 100 to control the operation of the control unit 100.

2, the supply unit 10 is disposed on the upper side of the bogie 20 and serves to supply the raw material for sintering to the lower bogie 20 on the movement path of the bogie 20. The supply unit 10 may include a first supply portion 12 for supplying the upper light and a second supply portion 11 for supplying the compounding material in which iron ore and coke are mixed.

The first supply part 12 may be an upper light hopper in which upper light is stored. The first supply part 12 may be disposed in front of the second supply part 11 and may supply the upper light into the carriage 20 before the second supply part 11. Therefore, the compounding material can be charged in the upper part of the upper light within the carriage 20. [ That is, the compounding material can be easily attached to the lower portion of the carriage 20. Accordingly, the lower portion of the truck 20 is filled with the upper light, and then the blending raw material is supplied to suppress or prevent the blending raw material from adhering to the lower portion of the truck 20.

The second supply portion 11 is provided below the surge hopper 11a and the surge hopper 11a in which the mixed raw materials are mixed with the iron ore raw material and the coke as the heat source to store the mixed raw materials, A drum mixer 11b and a charging chute 11c disposed at one side of the drum mixer 11b to form a moving path of the mixing raw material and having a slope.

When the blending material in the surge hopper 11a is supplied to the drum mixer 11b, the blending material is mixed in the drum mixer 11b and then discharged and guided into the inside of the carriage 20 through the charging chute 11c have. At this time, the blended raw materials can be loaded into the bogie 20 due to segregation due to the difference in particle size and density through the charging chute 11c. However, the structure of the supply unit 10 is not limited to this and may vary. Here, the sintering raw material refers to the blend raw material supplied through the second supply part 11 and the upper light provided through the first supply part 12. [

The bogie 20 forms a space in which the sintering raw material is received, and a plurality of the bogie 20 can be installed in the orbit to move in one direction. For example, the bogie 20 may form a closed loop to rotate in an endless track manner and move along the upper movement path and the lower rotation path. In the moving path, the raw material for sinter is charged into the bogie 20 to sinter the raw material for sintering. In the bogie path, the empty bin 20 having the sintered light is moved, and the bogie 20 is moved to the upper moving path for the sintering process.

The movement path may be extended in the longitudinal direction. The transfer path is located at the foremost position and is located in the charging zone where the supply unit (10) is disposed, behind the charging zone and in the ignition zone where the ignition furnace (30) is disposed, and in the rear of the ignition zone, Lt; / RTI >

That is, the charging section is a section in which the raw material for sinter is charged or irradiated into the bogie 20 in the moving path, the ignition section is a section for igniting the raw materials for sintering in the bogie 20, And the sintering raw material is sintered while moving the ignited flame downward on the upper surface of the sintering raw material. At this time, the bogie 20 can move from the front to the rear of the movement route.

The ignition furnace (30) is disposed on the ignition section during the movement path of the bogie (20). The ignition furnace 30 is disposed behind the supply unit 10 on the basis of the moving direction of the truck 20, and can discharge the flame downward. Thus, the ignition furnace 30 injects the flame into the carriage 20 filled with the sintering raw material by the supply unit 10, thereby igniting the raw materials for sintering.

The wind box 40 is disposed at a lower portion of the carriage 20, and a plurality of wind boxes 40 can be arranged in a line along the movement path. That is, the wind box 40 may be provided between the ignition furnace 30 and the section where the raw material for sinter is discharged from the bogie 20.

Further, the wind box 40 sucks air in the lower direction of the truck 20. Thus, when the truck 20 is moved on the wind box 40, the upper air of the truck 20 can be sucked into the lower wind box 40 through the sinter raw material in the truck 20. Therefore, the flame ignited on the upper surface of the sintering raw material in the carriage 20 moves downward by the air sucked into the wind box 40, and the entire sintering raw material can be sintered. However, the section in which the wind box 40 is provided is not limited to this and may vary.

The gas discharge unit 50 is connected to the plurality of windboxes 40 to provide a suction force to the windbox 40 and to discharge the sucked air to the outside. The gas discharge unit 50 includes a suction pipe 51 connected to a lower portion of the plurality of windboxes 40 and forming a space in which air can be received and accommodated therein, A blower 53 disposed behind the dust collector 52 based on the moving direction of the sucked air and a chimney 54 disposed behind the blower 53. [ At this time, the air can move from the front to the rear along the path of air movement in the suction pipe 51.

When the blower 53 generates a suction force, air is sucked through the wind box 40, and the sucked air can move toward the blower 193 along the suction pipe 51. The air may then be filtered through the dust collector 52 and filtered out before passing through the blower 53 to the chimney 54. That is, the blower 53 is capable of sucking air on the upper portion of the carriage 20 by forming a negative pressure in the windbox 40.

At this time, it is important to supply the sintering raw material with a uniform density into the carrier 20 in order to improve sintering productivity and sintering recovery rate. However, during the process of charging the sintering raw material into the carriage 20 by using the charging chute 11c, the raw material for sintering may be attached to the charging chute 11c.

Since the attached sintered raw material interferes with the movement of other sintered raw materials, the amount of sintered raw material passing through the portion of the charging chute 11c through which the sintered raw material is adhered and the amount of the sintered raw material passing through the non- May occur. Therefore, if the raw material for sinter is loaded into the carriage 20 by using the charging chute 11c in the state that the raw material for sinter is attached, the raw material for sinter can be uniformly loaded in the width direction, The density may become non-uniform. Accordingly, the flow rate measurement unit 200 and the adjustment unit 100 according to the embodiment of the present invention can be provided to monitor and adjust the density of the sintering raw material in the bogie 20.

3 and 4, the adjustment unit 100 is disposed on the movement path of the bogie 20, and a plurality of bogie bogie arms 20 are provided to extend in the direction intersecting the movement direction of the bogie 20, So that the density of the raw material in the carriage 20 can be adjusted at a plurality of positions. The control unit 100 includes a plate 110 extending in a direction intersecting the moving direction of the carriage 20 and a driver 120 connected to the plate 110 to move the plate 110 up and down. A support member 140 for supporting the actuator 120 and a pressing roll 130 connected to a lower portion of the plate 110 so as to press the raw material for sintering.

The support member 140 may be disposed between the supply unit 10 and the ignition way 30. The supporting member 140 is formed in a frame shape extending in a direction intersecting the moving direction of the carriage 20 (or in the width direction of the carriage 20) to support the driver 120, I can do it. That is, the support members 140 of the plurality of adjustment units 100 may be integrally connected to form one frame. However, the structure and the shape of the support member 140 are not limited to these, and may vary.

The actuator 120 may be a cylinder, connected to the plate 110 to support the plate 110, and move the plate 110 up and down. The driver 120 is fixed to the support member 140 at the body part, and the rod part can be moved back and forth up and down toward the inside of the carriage 20. [ In addition, the drivers 120 of the plurality of adjustment units 100 may be arranged in a line spaced along the extending direction of the support member 140.

The plate 110 may be formed in the form of a rectangular plate having an area. Further, the plate 110 can be connected to the rod portion of the driver 120 and move up and down. Therefore, when the plate 110 is moved downward, pressure can be applied to the raw material inside the carriage 20 downward.

The plates 110 of the plurality of adjustment units 100 may be arranged in a line along the extending direction of the support member 140. The total width of these plates 110 may be less than the inside width of the bogie 20. Thus, the plates 110 can be inserted into the carriage 20. In addition, the plates 110 may have an area capable of pressing the raw materials for sintering by intervals in the carriage 20 by an extended length. However, the structure and the shape of the plate 110 are not limited thereto and may vary.

The pressing roll 130 may be connected to the lower portion of the plate 110. The pressure roll 130 may be formed to extend in the width direction of the carriage 20 and be rotatable about a central axis. Accordingly, when the plate 110 is moved downward, the pressing roll 130 also moves downward, so that the raw material of the lower sinter can be pressed or pressed. Accordingly, the pressed portion of the raw material for sinter by the pressing roll 130 may be compressed and the density may increase.

Further, since the pressing roll 130 can rotate, it is possible to reduce the friction with the material passing through the lower side of the plate 110. Accordingly, the press roll 130 can guide the raw material to pass smoothly through the lower side of the plate 110 while pressurizing the raw material. However, the structure and shape of the pressure roll 130 are not limited to this and may vary.

The flow rate measurement unit 200 is disposed behind the ignition furnace 30 and is capable of measuring the flow rate of the air inside the sintering raw material in the carriage 20 on the movement route. That is, the flow rate measurement unit 200 can measure the flow rate of air sucked into the wind box 40 by being disposed on the upper side of the wind box 40. The flow rate measuring unit 200 may be arranged in a line along a direction intersecting with the moving direction of the bogie 20 (or a width direction of the bogie), provided with the adjusting unit 100.

The flow rate measuring unit 200 is connected to the support frame 220 in which a space for accommodating the sensor 210 is formed and a sensor 210 for sensing the flow rate of air, A sensor 210 and a support frame 220 are connected to the support frame 220. The sensors 210 and 220 support the sensor 210 and the support frame 220, And a second driving unit (not shown) for moving the upper and lower driving units.

The sensor 210 may be a sensor that measures the flow rate of the hot wire type. However, the type of the sensor 210 is not limited to this and may be various.

The support frame 220 may be formed in a cylindrical shape extending in the vertical direction. An insertion groove into which the sensor 210 can be inserted may be formed below the support frame 220. Accordingly, the sensor 210 can be installed inside the support frame 220, and the support frame 220 can support the sensor 210 and protect it from the outside.

Also, a ground plate (not shown) formed of a stretchable and contractible material may be provided at the lower end of the support frame 220. Thus, even if the lower end of the support frame 220 comes into contact with the sintering raw material in the bogie 20, the ground plate absorbs the impact and the support frame 220 can be prevented from being worn out. However, the structure and shape of the support frame 220 are not limited to the above, and the material of the ground plate may be various and not limited thereto.

The first driving unit may be a motor or a cylinder and is connected to the support frame 220 to move the support frame 220 back and forth. The first driving unit moves the support frame 220 forward or backward in accordance with the speed of the carriage 20 so that the sensor 210 moves along the carriage 20 when the carriage 20 carries and moves the sintering material. The air flow rate at any one part of the raw material for sinter can be measured.

The second driving unit may be a motor or a cylinder and is connected to the support frame 220 to move the support frame 220 back and forth. Accordingly, when measuring the air velocity inside the raw material for sintering, the second driving part can move the support frame 220 downward and closely contact the upper surface of the raw material for sinter. Therefore, the flow rate inside the raw material for sinter can be accurately measured in a state where the insertion groove formed in the lower part of the support frame 220 is closed on the upper surface of the raw material for sinter and the sensor 210 is close to the raw material for sinter.

On the other hand, when the flow velocity is not measured, the second driving unit may move the support frame 220 upward to separate the support frame 220 from the bogie 20. Alternatively, the second driving unit may move the support frame 220 upward when the first driving unit moves the support frame 220 by the maximum distance that the support frame 220 can move forward or backward.

That is, when the support frame 220 moves by the maximum movement distance, it can not move forward or backward any more, so that it can be damaged by the impact from the raw material in the moving bogie 20. Therefore, when the support frame 220 can not move along the carriage 20 while the carriage 20 is moving, the second drive unit can move the support frame 220 upward. However, the operation method of the first driving unit and the second driving unit is not limited to this and may be various.

On the other hand, the flow velocity measurement unit 200 may be fixed to the overbridge 70 installed on the movement path of the bogie 20. The over bridge 70 is installed on the moving path to observe the surface condition of the truck 20 and extends in the direction intersecting the moving direction of the truck 20, As shown in Fig. At this time, each of the plurality of flow measurement units 200 may be disposed corresponding to each of the plurality of adjustment units 100 on the movement route of the bogie 20. That is, each flow rate measurement unit 200 can be disposed in the same line with the respective adjustment units 100 on the basis of the moving direction of the bogie 20, and arranged in a one-to-one correspondence with each other. Therefore, it is possible to operate the adjustment unit 100 at the position corresponding to the abnormal portion of the flow velocity value measured by the flow velocity measurement unit 200. However, the method of positioning and fixing the flow velocity measurement unit 200 is not limited to this and may vary.

The control unit 300 is connected to the flow rate measurement unit 200 and can control the operation of the adjustment unit 100 according to the measured flow rate value. The control unit 300 includes a transmission and reception unit 310 connected to the plurality of flow measurement units 200, a comparison unit 320 for comparing the flow rates measured by the flow measurement unit 200, And a control unit 330 for controlling the operation of the adjustment unit 100 according to the determination of the comparison unit 320. [

The transmission / reception unit 310 is connected to the plurality of flow rate measurement units 200 and can exchange flow rate information of the air in the raw material for sinter according to the position. That is, the transceiver 310 can obtain the flow velocity values of the air inside the raw material of the sinter by the positions along the width direction of the bogie 20 from the flow velocity measuring units 200.

The comparing unit 320 is connected to the transmitting and receiving unit 310 and receives the flow velocity value information of the air inside the bogie 20 by the position along the width direction of the bogie 20. In addition, the comparison unit 320 may compare the flow velocity values to check the density of the sintered raw material. That is, the portion of the sludge material having a small density in the bogie 20 is easily sensed by the air because the air can pass easily, and the portion of the dense material of the sintering raw material can not easily pass through, .

Accordingly, the density of the sintering raw material can be indirectly estimated or calculated by using the flow velocity values of the air in the bogie 20, which are measured in inverse proportion to the density of the raw material for sintering. Therefore, it is possible to confirm whether the sintering raw materials are charged in the bogie 20 at a uniform density by comparing the flow velocity values measured at a plurality of positions.

The comparing unit 320 may compare the minimum value and the remaining values among the plurality of measured flow velocity values. For example, the comparison unit 320 may compare at least one of the remaining values excluding the minimum value to be equal to or greater than 1.1 times the minimum value. Thus, if the value is 1.1 times larger than the minimum value among the remaining values, it can be judged that the density of the sintering raw material is abnormal. That is, it can be determined that the density of the portion of the sintered material having a higher flow velocity is smaller than the density of the other portion, and it can be determined that the sintered material can not be uniformly loaded into the carriage 20 with respect to the width direction. However, the value used as a reference for comparison is not limited to this and may vary.

The control unit 330 may be connected to the comparison unit 320 and may control the operation of the drivers 120 according to the determination of the comparison unit 320. For example, the control unit 330 actuates a driver positioned on the same line as the flow velocity measuring unit, which detects a flow velocity higher than that of the other flow velocity measuring units 200, to move the plate and the pressing roll downward . Accordingly, the pressing roll 130 compresses a portion of the sintering raw material having a high flow rate of air, thereby increasing the density of the sintering raw material. Therefore, the air can not easily pass through the compressed portion of the raw material for sinter, so that the flow velocity of the air can be reduced, and the flow velocity of the air throughout the raw material for sintering can be made uniform. That is, the density of the sintering raw material can be made uniform in the width direction of the bogie 20.

For example, the five adjustment units 100 are provided, and the first adjustment unit 100a, the second adjustment unit 100b, the third adjustment unit 100c in the widthwise direction of the truck 20 from left to right, The fourth adjustment unit 100d and the fifth adjustment unit 100f can be disposed and the density of the sintering raw material in the width direction of the truck 20 can be adjusted at each position. 4 (a), when the slow flow rate is measured at the center of the sintering raw material and the fast flow velocity is measured at the outer frame portion, two control units 100, 1 control unit 100a and the fifth control unit 100f to move the press roll downward. Thus, the measured portion of the fast flow velocity may be compressed to reduce the flow velocity and increase the density.

On the contrary, when the slow flow rate is measured at the outer portion of the sintering raw material and the high flow velocity is measured at the center portion as shown in FIG. 4 (b), three adjustment units arranged at the center among the five adjustment units 100 The second adjusting unit 100b, the third adjusting unit 100c, and the fourth adjusting unit 100d can be operated to move the pressing roll downward. Thus, the measured portion of the fast flow velocity may be compressed to reduce the flow velocity and increase the density.

Alternatively, as shown in FIGS. 4 (c) and 4 (d), when the fast flow velocity is measured on the left or right side of the raw material for sinter and the slow flow velocity is measured in other portions, Only the first adjusting unit 100a or the fifth adjusting unit 100f disposed on the right side can be operated to move the pressing roll downward. Thus, the measured portion of the fast flow velocity may be compressed to reduce the flow velocity and increase the density. Therefore, the density of the sintering raw material can be made uniform in the width direction of the bogie 20. However, the number of the control units 100 is not limited to three, seven, or the like. Further, as the number of the adjusting units 100 is increased, the density of the sintering raw material can be more precisely adjusted in the width direction of the bogie 20.

In this manner, the flow rate of the air in the sintering raw material can be measured at a plurality of positions, and the difference in density of the raw materials for sintering can be detected depending on the position. Accordingly, it is possible to monitor in real time whether the sintering raw material is uniformly charged into the carriage 20 during the sintering process.

Further, the density of the sintering raw material can be adjusted at a plurality of positions in the width direction of the carriage 20 by using the adjustment unit 100. If the density of the raw materials for sintering in the bogie 20 is not uniform, the density of the raw materials for sintering can be controlled so as to be uniform in the width direction. Therefore, the sintering raw material in the bogie 20 can be uniformly fired, and the sintering recovery rate and sintering productivity can be improved.

FIG. 5 is a flow chart showing a sintering method according to an embodiment of the present invention. FIG. 6 is a graph showing the flow rate of air inside the conventional sintering raw material and the flow rate of air inside the sintering raw material according to the embodiment of the present invention .

Hereinafter, a sintering method according to an embodiment of the present invention will be described.

Referring to FIG. 5, the sintering method according to the embodiment of the present invention includes the steps of charging raw materials for sinter into a truck moving along a moving path, igniting the raw materials for sinter, The method comprising the steps of: detecting a density of a sintering raw material at a plurality of positions in a direction intersecting with a moving direction of the sled to determine an abnormality; and if a density of the sintering raw material is abnormal, . &Lt; / RTI >

First, a plurality of bogies 20 are sequentially passed to the lower side of the supply unit 10, and a raw material layer is formed by charging raw materials for sintering to each of the plurality of bogies 20 through the supply unit 10. (S100) Next, when a plurality of bogies 20 sequentially pass under the ignition passages 30, the flames are ignited at the upper part of the material layer by the ignition passages 30 (S200) The sintered raw material is sintered.

In other words, in the process of moving the bogie 20 through the sintering section, a plurality of windboxes 40 disposed in the sintering section suck the air on the upper portion of the bogie 20 downward, Burns the raw material. Then, the sintered material, that is, the sintered ores, is discharged from the carriage 20 and then can be transferred to a cooler (not shown) and cooled.

At this time, it is important to supply the sintering raw material with a uniform density into the carrier 20 in order to improve sintering productivity and sintering recovery rate. However, during the process of charging the sintering raw material into the carriage 20 by using the charging chute 11c of the supply unit 10, the raw material of the sintering can be attached to the charging chute 11c.

Since the attached sintered raw material interferes with the movement of other sintered raw materials, the amount of sintered raw material passing through the portion of the charging chute 11c through which the sintered raw material is adhered and the amount of the sintered raw material passing through the non- May occur. Therefore, if the raw material for sinter is loaded into the carriage 20 by using the charging chute 11c in the state where the raw material for sinter is attached, the raw material for sinter can be uniformly loaded in the width direction, The density may become non-uniform.

Therefore, it is possible to monitor the density of the sintering raw material at a plurality of positions before or after the air is sucked into the lower portion of the sintering raw material by using the wind box 40, thereby monitoring the density of the sintering raw material. )

For example, a plurality of flow velocity measurement units 200 arranged in a line along a direction intersecting with the moving direction of the bogie 20 (or a width direction of the bogie) The flow rate of the air can be measured, and the density of the sintering raw material can be predicted using the measured flow velocity value. That is, the portion of the sludge material having a small density in the bogie 20 is easily sensed by the air because the air can pass easily, and the portion of the dense material of the sintering raw material can not easily pass through, .

Therefore, the density of the sintering raw material can be indirectly predicted or calculated for each position by using the flow velocity values of the air in the bogie 20, which are measured in inverse proportion to the density of the raw materials for sintering. Therefore, it is possible to confirm whether the sintering raw materials are charged in the bogie 20 at a uniform density by comparing the flow velocity values measured at a plurality of positions.

For example, the flow rate of air in the bogie 20 can be measured as follows. First, the support frame 220 may be moved downward and brought into close contact with the upper surface of the raw material for sinter. Accordingly, the insertion groove formed in the lower portion of the support frame 220 may be located on the upper surface of the sintering raw material in a state where the sensor 210 is close to the sintering raw material.

The support frame 220 can then be advanced or retracted to match the speed of the truck 20. Thus, the sensor 210 can move along the carriage 20 to measure the air flow rate at any one portion of the sintering raw material. Therefore, the sensors 210 of the plurality of flow rate measurement units 200 arranged in the width direction of the truck 20 can measure the air flow rate within a predetermined portion of the raw material for sintering.

Then, it is possible to compare the minimum value and the remaining values among the plurality of measured flow velocity values. For example, it is possible to compare at least one of the remaining values except for the minimum value to be equal to or greater than 1.1 times the minimum value. Therefore, it can be determined that there is an abnormality in the density of the sintering raw material (S400). If the density of the sintering raw material is higher than the density of the other portions, .

If the value is more than 1.1 times larger than the minimum value, it can be judged that the density of the raw material of the sinter is different from the portion where the minimum value is measured at least 1.1 times the measured value and the minimum value. That is, it is judged that the density of the raw material for sinter which is 1.1 times or more larger than the minimum value is smaller than the density of the raw material for sinter at the minimum value portion, so that it can be judged that the raw material for sinter can not be uniformly charged into the rail. On the other hand, if the value is larger than the minimum value by 1.1 times, it can be judged that the sintered raw material densities of the portions corresponding to the two values are uniform. However, the value used as a reference for comparison is not limited to this and may vary.

Then, if it is determined that the raw material for sinter has not been uniformly charged into the carriage 20, a portion corresponding to a portion having a flow velocity value larger than the minimum value, that is, a portion having a small density can be pressed by the pressing roll 130. S500)

For example, the raw material may not continue to be uniformly charged in the width direction into the carriage 20. At this time, the control unit 100 and the flow rate measurement unit 200 are spaced apart from each other in the moving direction of the raw material, but they adjust the density in the width direction of the bogie 20 or measure the flow rate of the air. Accordingly, it can be determined that the flow velocity value of the air in the bogie 20 measured at the flow velocity measuring unit 200 located at the rear of the control unit 100 is maintained from the upstream raw material for sintering. By controlling the operation of the adjusting unit 100 according to the measured value of the flow rate measuring unit 200 located behind the adjusting unit 100, the density of the sintering raw material can be adjusted to be uniform in the width direction.

First, a sintering raw material at a portion corresponding to the measured portion of the flow velocity value larger than the minimum one of the flow velocity values measured at a plurality of positions can be pressed. That is, the plate and the press roll can be moved downward by actuating a driver positioned on the same line as the flow velocity measuring unit, which is detected at a higher flow velocity than other flow velocity measuring units of the plurality of flow velocity measuring units 200. Accordingly, the pressing roll 130 compresses a portion of the sintering raw material having a high flow rate of air, thereby increasing the density of the sintering raw material. Therefore, the flow velocity of the compressed portion of the raw material for sintering can be reduced, and the flow velocity can be made uniform throughout the raw material for sintering. That is, the density of the raw materials for sintering becomes uniform as a whole, and the raw materials for sintering can be uniformly fired.

For example, as shown in FIG. 6 (a), among the flow velocity values of the air inside the bogie 20 measured at a plurality of positions along the width direction of the bogie 20, . Therefore, it can be judged that the density of the sintered raw material is not uniform because the density of the left and center sides of the raw sintered material is smaller than the density of the right side.

Therefore, the density of the left side and the center side can be increased by pressing the left and center side portions of the raw material for sinter. As the density of the left and center sides of the raw material for sinter increases, the air can hardly move to the inside, and the flow rate of the air can be reduced. 6 (b), the density of the raw materials for sintering can be uniformly adjusted in the bogie 20 as the flow rates at the left, center and right of the raw materials for sinter become uniform.

Table 1 below compares the operation results (comparative example) of the conventional sintering process with the operation results (Examples 1, 2 and 3) of the sintering process according to the embodiment of the present invention, and found that the sintering productivity, the sintering recovery rate, , And the sintering bonding ratio.

Comparative Example Example 1 Example 2 Example 3 Sintering productivity
(t / d · m ² )

33.0
33.8
34.2
34.1 Sintering recovery rate
(%) 75.2 76.2 77.4 77.1 Sintered light intensity (SI)
(%) 90.4 90.6 90.7 90.5 Sintering binder ratio
(kg / ts) 60.5 59.1 58.0 58.2

Table 1 shows that when controlling the density of the sintering raw material to be uniform in the width direction of the carriage 20 according to the embodiment of the present invention, the sintering productivity, the sintering recovery rate, and the sintered light intensity are improved, It can be confirmed that the consumption cost is reduced. Thus, controlling the density of the sintering raw material to be uniform can be confirmed to improve the quality of the sintered ore and the efficiency of the sintering process.

Although the present invention has been described in detail with reference to the specific embodiments thereof, it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited by the described embodiments, but should be defined by the appended claims, as well as the appended claims.

10: supply unit 20:
30: By ignition 40: Wind box
50: gas exhaust unit 100: regulating unit
110: plate 120: actuator
130: pressure roll 200: flow velocity measuring unit
300: control unit

Claims

A supply unit for supplying a raw material for sintering downward;
A bogie located below the supply unit and having a space formed therein for loading the raw material for sinter;
An ignition means provided on the moving path of the truck for spraying a flame with the sintering raw material in the truck;
A plurality of windboxes arranged along the movement path to suck air at a lower portion of the bogie; And
A control unit located between the supply unit and the ignition and installed in a direction intersecting the moving direction of the truck on the moving path so as to control the density of the sintering raw material in the truck; Containing sintering apparatus.

The method according to claim 1,
The adjustment unit includes:
A plate extending in a direction crossing the moving direction of the truck; And
A driver coupled to the plate to move the plate up and down; Containing sintering apparatus.

The method of claim 2,
Wherein the adjusting unit further comprises a pressing roll connected to a lower portion of the plate to press the sintering raw material.

The method according to any one of claims 1 to 3,
Wherein the plurality of regulating units are disposed in a direction intersecting the moving direction of the truck.

The method of claim 4,
Further comprising a plurality of flow velocity measurement units arranged in a direction intersecting the moving direction of the bogie to measure an air flow velocity inside the bogie on the movement route,
And each of the plurality of flow velocity measurement units is disposed corresponding to each of the plurality of adjustment units on the moving path of the bogie.

The method of claim 5,
And the flow velocity measuring unit is disposed on the upper side of the wind box.

The method of claim 5,
And a control unit connected to the flow rate measurement unit and controlling operation of the adjustment unit.

A sintering method for producing sintered ores,
A process of charging raw materials for sinter into the inside of the bogie moving along the movement route;
A step of igniting the raw material for sinter;
A step of sucking air in a lower direction of the raw material for sinter and detecting the density of the raw material for sinter at a plurality of positions in a direction intersecting with the moving direction of the car to determine an abnormality; And
Controlling the density of the sintering raw material in the bag when the density of the sintering raw material is abnormal; Containing sintering process.

The method of claim 8,
The process of sensing the density of the raw material for sinter may include:
Measuring a flow velocity of air in the inside of the vehicle, and estimating the density using the measured flow velocity value.

The method of claim 9,
The process of determining the abnormality includes:
Comparing a minimum value and a remaining value among the flow velocity values measured at a plurality of positions; And
And determining whether or not at least one of the remaining values is at least 1.1 times the minimum value.

The method of claim 9,
The process of controlling the density of the raw material for sinter may include:
And pressing the sintering raw material at a portion corresponding to the measured flow velocity value greater than the minimum one of the flow velocity values measured at the plurality of positions.