KR101749081B1 - Apparatus and Method for Manufacturing Sintered Ore - Google Patents
Apparatus and Method for Manufacturing Sintered Ore Download PDFInfo
- Publication number
- KR101749081B1 KR101749081B1 KR1020150147699A KR20150147699A KR101749081B1 KR 101749081 B1 KR101749081 B1 KR 101749081B1 KR 1020150147699 A KR1020150147699 A KR 1020150147699A KR 20150147699 A KR20150147699 A KR 20150147699A KR 101749081 B1 KR101749081 B1 KR 101749081B1
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- KR
- South Korea
- Prior art keywords
- raw material
- sintering
- bogie
- density
- unit
- Prior art date
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B21/00—Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction
- F27B21/06—Endless-strand sintering machines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/0033—Charging; Discharging; Manipulation of charge charging of particulate material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/06—Charging or discharging machines on travelling carriages
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacture And Refinement Of Metals (AREA)
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
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.
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
The sintering apparatus further includes a
2, the
The
The
When the blending material in the
The
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
The ignition furnace (30) is disposed on the ignition section during the movement path of the bogie (20). The
The
Further, the
The
When the
At this time, it is important to supply the sintering raw material with a uniform density into the
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
3 and 4, the
The
The
The
The
The
Further, since the
The flow
The flow
The
The
Also, a ground plate (not shown) formed of a stretchable and contractible material may be provided at the lower end of the
The first driving unit may be a motor or a cylinder and is connected to the
The second driving unit may be a motor or a cylinder and is connected to the
On the other hand, when the flow velocity is not measured, the second driving unit may move the
That is, when the
On the other hand, the flow
The
The transmission /
The comparing
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
The comparing
The
For example, the five
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
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
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
Further, the density of the sintering raw material can be adjusted at a plurality of positions in the width direction of the
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, . ≪ / RTI >
First, a plurality of
In other words, in the process of moving the
At this time, it is important to supply the sintering raw material with a uniform density into the
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
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
For example, a plurality of flow
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
For example, the flow rate of air in the
The
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
For example, the raw material may not continue to be uniformly charged in the width direction into the
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
For example, as shown in FIG. 6 (a), among the flow velocity values of the air inside the
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
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.
(t / d · m 2 )
33.0
33.8
34.2
34.1
(%)
(%)
(kg / ts)
Table 1 shows that when controlling the density of the sintering raw material to be uniform in the width direction of the
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
Further, the density of the sintering raw material can be adjusted at a plurality of positions in the width direction of the
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 (11)
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;
An adjustment 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; And
And 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 moving route,
Wherein the flow velocity measurement unit includes a sensor capable of measuring a flow rate of air and a drive unit capable of moving the sensor in a moving direction of the bogie according to the velocity of the bogie.
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.
Wherein the adjusting unit further comprises a pressing roll connected to a lower portion of the plate to press the sintering raw material.
Wherein the plurality of regulating units are disposed in a direction intersecting the moving direction of the truck.
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.
And the flow velocity measuring unit is disposed on the upper side of the wind box.
And a control unit connected to the flow rate measurement unit and controlling operation of the adjustment unit.
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; Including,
The step of sensing the density of the raw material for sintering may include the steps of measuring a flow rate of air in the car while moving a sensor for measuring an air flow rate along the moving direction of the car in accordance with the speed of the car, And predicting the density.
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 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.
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Cited By (1)
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KR20220013795A (en) | 2020-07-27 | 2022-02-04 | 현대제철 주식회사 | Method of estimating yield of iron ore sinter using iron ore reactivity index |
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KR101962382B1 (en) * | 2017-08-30 | 2019-03-26 | 주식회사 포스코 | Apparatus for measuring permeability and Sintering apparatus |
KR102074359B1 (en) * | 2017-11-30 | 2020-02-06 | 주식회사 포스코 | Apparatus and Method for quality prediction |
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KR20220013795A (en) | 2020-07-27 | 2022-02-04 | 현대제철 주식회사 | Method of estimating yield of iron ore sinter using iron ore reactivity index |
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