CN108351172B

CN108351172B - Device and method for loading raw material

Info

Publication number: CN108351172B
Application number: CN201680064812.XA
Authority: CN
Inventors: 丁海权; 赵秉国; 李承振; 郑殷镐; 宋旻洙; 朴钟寅
Original assignee: Posco Co Ltd
Current assignee: Posco Holdings Inc
Priority date: 2015-11-06
Filing date: 2016-11-03
Publication date: 2020-01-10
Anticipated expiration: 2036-11-03
Also published as: KR20170053460A; EP3372936B1; EP3372936A1; CN108351172A; KR101749079B1; EP3372936A4; WO2017078429A1; JP2018536837A

Abstract

The present invention relates to a device for loading raw material and a method for loading raw material applied to the device, the device comprising: a first hopper disposed above a reservoir traveling along a path; a first loading chute extending obliquely below the first hopper and having an opening perforated in a direction intersecting the extending direction; a second hopper disposed above the reservoir remote from the first hopper; and a second loading chute extending obliquely below the second hopper and the first loading chute. The present invention provides an apparatus and method for loading raw materials that enhances the yield and strength of sintered ore at the top of the raw material layer.

Description

Device and method for loading raw material

Technical Field

The present disclosure relates to a raw material loading apparatus and a raw material loading method. More particularly, the present invention relates to a raw material loading method and a raw material loading apparatus for uniformly mixing and loading a solid fuel on an upper portion of a raw material layer to improve a collection rate and strength of sintered ore in the upper portion of the raw material layer.

Background

Sintered ore is used as a raw material for manufacturing iron in a blast furnace. Sintered ore is produced by: mixing sintering raw materials such as iron ore with solid fuels (e.g., coke and anthracite), burning the solid fuels, and sintering the iron ore using the heat of combustion. A process of manufacturing sintered ore in this manner will be described below.

First, various raw materials, sub-raw materials, coke, and the like are extracted from the raw material storage vehicle. Thereafter, the extracted raw materials, sub-raw materials, coke, and the like are mixed together with water in a mixer to prepare a mixed raw material. Thereafter, the mixed raw materials are transported to a buffer hopper using a belt conveyor and temporarily stored in the buffer hopper. Thereafter, the upper ore temporarily stored in the upper ore hopper and the mixed raw material temporarily stored in the buffer hopper are injected into the sintering vehicle. Thereafter, the sintering vehicle is passed through the lower side of the ignition furnace to fire the upper portion of the mixed raw materials. Thereafter, the sintering vehicle is moved to the ore discharge unit side and air is forcibly sucked into the lower portion of the mixed raw material to fire the lower portion of the mixed raw material.

In this regard, after the raw material is dried and heated, the combustion heat of the coke transported to the lower portion of the mixed raw material is discharged to the suction blower. Further, the combustion portion of the mixed raw materials is cooled by the forcibly sucked air and sintering is completed.

The mixed raw material charged on the sintering vehicle is completely sintered before the sintering vehicle reaches the ore discharging unit. Thereafter, when the sintering vehicle reaches the ore discharging unit, the completely sintered ore is discharged to the ore discharging unit. Thereafter, the sintered ore is crushed to a certain size or less in a crusher. Furthermore, the sinter ore is loaded onto a cooling device and is cooled thereby. Thereafter, the sintered ore is transported to a blast furnace and used as a raw material in an iron making process. For example, a downdraft dhot-Lloyd (Dwight-Lloyd) type sintering apparatus is applied to a process of manufacturing sintered ore.

On the other hand, when the mixed raw materials are sintered in the process of the downdraft dhitt-laeger type sintering apparatus described above, the heat at the upper portion of the raw material layer of the mixed raw materials is insufficient. At the same time, the heat at the lower portion of the raw material layer is excessive. As described above, when the heat at the upper portion of the raw material layer where the raw materials are mixed is insufficient and the heat at the lower portion of the raw material layer is excessive, the sintered ore produced at the upper and lower portions of the raw material layer may not be sintered to have sufficient strength.

(patent document 1) KR 10-2004-0088781A.

Disclosure of Invention

Technical purpose

The present disclosure provides a raw material loading apparatus and a raw material loading method for improving the collection rate and strength of sintered ore in the upper portion of a plateau material layer.

The present disclosure provides a raw material loading apparatus and a raw material loading method for uniformly mixing and loading a mixed raw material and a solid fuel on an upper portion of a raw material layer.

The present disclosure provides a raw material loading apparatus and a raw material loading method for adjusting a loading state of a solid fuel in a width direction of a raw material layer.

Technical solution

The raw material loading device according to the present disclosure includes: a first hopper disposed above a storage vehicle traveling along a path; a first loading chute that is disposed below the first hopper and that extends obliquely, wherein the first loading chute has a through-hole defined therethrough in a direction intersecting the extending direction of the first chute; a second hopper disposed above the storage vehicle and spaced apart from the first hopper; and a second loading chute arranged below the second hopper and the first loading chute and extending obliquely.

The first loading chute may comprise an upper portion and a lower portion, wherein at least the lower portion of the first loading chute comprises at least one inclined plate extending obliquely upwards with respect to the direction of travel of the storage vehicle, wherein the through-hole comprises a plurality of slits passing through the inclined plate at a plurality of locations spaced from each other of the inclined plate in the direction of travel of the storage vehicle.

The first loading chute may comprise an upper portion and a lower portion, wherein at least the lower portion of the first loading chute comprises a plurality of rollers arranged in an upwardly inclined manner with respect to the direction of travel of the storage vehicle, wherein the through-hole comprises a plurality of roller gaps defined between some or all of the rollers spaced from each other in the direction of travel of the storage vehicle.

At least the upper portion of the first loading chute may extend or be oriented at an angle of 55 ° to 90 ° relative to the storage vehicle, wherein the angle of inclination of the first loading chute decreases from the upper portion to the lower portion.

The plurality of rollers arranged at least in the lower portion of the first loading chute may be spaced apart from each other by a spacing of between 3mm and 50 mm.

The second hopper may be provided in plurality and arranged in the width direction of the path.

A plurality of separate gates may be arranged in the outlet of the second hopper, wherein the gates are arranged in the width direction of the path.

The second loading chute may comprise at least one inclined plate, wherein the inclined plate extends obliquely upwards with respect to the direction of travel of the storage vehicle.

At least the upper portion of the second loading chute may extend or be oriented at an angle of 55 ° to 90 ° relative to the storage vehicle, wherein the angle of inclination of the second loading chute decreases from its upper portion to its lower portion.

The second loading chute may be spaced from the first loading chute in the direction of travel of the storage vehicle such that a lower portion of the second loading chute faces a lower portion of the first loading chute.

The second loading chute may at least partly have a mixing area, wherein the raw material dispensed from the through-hole of the first loading chute reaches the mixing area.

According to the present disclosure, there is provided a method for loading raw material into a storage vehicle travelling along a path, the method comprising: dropping the stock material onto the first conveyance path and directing the stock material into a storage vehicle; dropping the fuel onto a second delivery path and directing the fuel into a storage vehicle; and mixing the raw material and the fuel in at least a portion of the second conveyance path.

Dropping the stock material onto the first conveyance path and directing the stock material into the storage vehicle may include: dropping the raw material obliquely onto a first conveyance path extending obliquely upward with respect to a traveling direction of the storage vehicle; and directing the stock material into a storage vehicle.

Dropping the fuel onto the second delivery path and directing the fuel into the storage vehicle may include: dropping the fuel obliquely onto a second delivery path arranged below and spaced from the first path and extending obliquely upward with respect to the direction of travel of the storage vehicle; and directing the fuel into a storage vehicle.

Dropping the fuel onto the second delivery path and directing the fuel into the storage vehicle may include: adjusting a supply amount of fuel to be supplied to the second conveying path based on a plurality of positions in a width direction of the second conveying path; and dropping the fuel obliquely to the second delivery path.

Dropping the fuel onto the second delivery path and directing the fuel into the storage vehicle may include: classifying the fuel based on a combustion rate of the fuel; and dropping the fuel obliquely to the second delivery path so that the fuel having a relatively high combustion rate is supplied to the center of the second delivery path.

Mixing the raw material and the fuel in at least a portion of the second conveyance path may include: distributing a portion of the raw material that obliquely drops to the first conveying path toward the second conveying path; and directing the raw material dispensed to the second conveyance path to at least a portion of the second conveyance path and mixing the raw material and the fuel on at least a portion of the second conveyance path.

Mixing the raw material and the fuel in at least a portion of the second conveyance path may include: a portion of the raw material that obliquely drops to the first conveying path is dropped into a through-hole defined through the first conveying path.

Mixing the raw material and the fuel in at least a portion of the second conveyance path may include: a portion of the raw material that has fallen obliquely to the first conveying path is dispensed to the second conveying path side while adjusting the amount of the raw material to be dispensed to the second conveying path.

Advantageous effects

According to an embodiment of the present disclosure, the solid fuel may be uniformly packed on the upper portion of the raw material layer in the height direction. Further, the solid fuel can be charged in the width direction by adjusting the charging state. Thereby, the collection rate and strength of the sintered ore at the upper portion of the raw material layer can be improved.

For example, when the present disclosure is applied to a sintered ore manufacturing apparatus in a steel mill, the mixed raw material and the solid fuel may be mixed into the upper layer and the surface layer of the raw material layer while the raw material layer is loaded to the storage vehicle. Specifically, the second conveyance path is provided below the first conveyance path, and a part of the mixed raw material is dropped to the second conveyance path using the second conveyance path and mixed with the solid fuel. Thus, the solid fuel and the mixed raw material are uniformly mixed into the upper layer and the surface layer of the raw material layer. In this regard, fine mixed raw materials can be mixed into the upper and surface layers of the raw material layer by loading the solid fuel.

Further, by adjusting the loading state of the solid fuel, the solid fuel can be packed in the width direction of the raw material layer. In detail, the type of the solid fuel and the amount of the solid fuel may be varied in the width direction of the travel path, and the loading height of the solid fuel may be varied by classifying the solid fuel particle size.

In this way, the proportion of the solid fuel in the mixed raw material can be reduced, the collection rate of the sintered ore at the upper layer of the raw material layer can be improved, and the difference in the quality of the finished material of the sintered ore in the width direction of the traveling path can be reduced. Further, the imbalance and shortage of heat at the upper and surface layers of the raw material layer can be reduced. Accordingly, quality deviation of the manufactured sintered ore can be minimized.

Drawings

Fig. 1 illustrates a processing apparatus using a raw material loading device and a raw material loading method according to an exemplary embodiment of the present disclosure.

Fig. 2 illustrates a raw material loading apparatus according to an exemplary embodiment of the present disclosure.

Fig. 3 shows a raw material loading device according to a variation of the present disclosure.

Fig. 4 illustrates an operational mode of a raw material loading apparatus according to an exemplary embodiment of the present disclosure.

Fig. 5 shows a graph illustrating the detailed structure of the loading chute according to an exemplary embodiment of the present disclosure.

Fig. 6 shows an operation mode of a raw material loading apparatus according to a comparative example of the present disclosure.

Detailed Description

Embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. However, the present disclosure is not limited to the embodiments disclosed below, but may be embodied in various different forms. However, the embodiments of the present disclosure are provided for completeness of disclosure and to provide a person of ordinary skill in the art with a complete knowledge of the present invention. The drawings may be exaggerated or enlarged to show embodiments of the present disclosure, in which like reference numerals refer to like elements throughout.

In the embodiments of the present disclosure, "upper" refers to an upper portion of a component, and "lower" refers to a lower portion of the component. That is, "upper" and "lower" are portions included in "corresponding parts". On the other hand, "above" is used to indicate a space or area above the component, and "below" is used to indicate a space or area below the component. In this regard, the space or area above the component is not included in the component, and the space or area below the component is not included in the component. The space or area above the component or the space or area below the component is outside of the component and may contact the component or may be spaced apart from the component.

The present disclosure relates to a raw material loading apparatus and a raw material loading method for loading storage vehicles traveling along a path with raw materials of various particle sizes separated in a vertical direction. Hereinafter, one exemplary embodiment of the present disclosure will be described in detail based on a sintered ore manufacturing facility of a steel mill. However, the present disclosure may be applied to various processing apparatuses for loading a material to be processed into a loading unit traveling in a predetermined direction or to a process using the processing apparatus.

Fig. 1 is a schematic view illustrating a processing apparatus to which a raw material loading device and a raw material loading method according to an exemplary embodiment of the present disclosure are applied, and fig. 2 is a schematic view illustrating a raw material loading device according to an exemplary embodiment of the present disclosure. Fig. 3(a) is a schematic view showing a second loading chute of the raw material loading device according to a modification of the present disclosure. Fig. 3(b) is a schematic view showing a second loading chute of the raw material loading device according to another modification of the present invention. Fig. 4 is a flowchart illustrating an operation mode of the raw material loading apparatus according to an exemplary embodiment of the present disclosure.

Referring to fig. 1 to 4, a processing apparatus according to an exemplary embodiment of the present disclosure is described in detail. A processing apparatus according to an exemplary embodiment of the present disclosure includes a storage vehicle 10, an upper ore hopper 20, a first loading unit 300, a second loading unit 400, a surface layer processing unit 50, an ignition furnace 60, a wind box 70, and an exhaust unit 80.

The storage vehicle 10 may include a vehicle configured to travel in one direction along a path. A space may be formed in the storage vehicle 10, and an upper portion of the storage vehicle 10 may be opened upward to allow the space formed in the storage vehicle 10 to communicate with the outside. A plurality of storage vehicles 10 are provided and the plurality of storage vehicles 10 may be arranged in series along a path to be connected in a looped structure.

The paths include an upper travel path and a lower return path. The storage vehicle 10 may travel in one direction along the travel path at the upper side of the path. The storage vehicle 10 may return in one direction along a return path at the lower side of the path. The storage vehicle 10 travels along a travel path and may form a stock material layer by loading material to be processed in the storage vehicle 10. The raw material layer formed inside the storage vehicle 10 may be manufactured into sintered ore via sintering and cooling while traveling in one direction along the traveling path. Thereafter, the sintered ore may be discharged from the storage vehicle 10 during the course of the storage vehicle 10 entering the return path. After the discharge is complete, the storage vehicle 10 may return to the return path and then to the travel path.

The material to be treated may be loaded into the interior of the storage vehicle 10 through the open upper portion of the storage vehicle 10. The material to be treated may include raw materials such as mixed raw materials and fuel such as solid fuel. The mixed raw material may be a mixed raw material for manufacturing sintered ore, and the solid fuel may be a solid fuel for manufacturing sintered ore. The mixed raw materials may be charged into the interior of the storage vehicle 10 to form the lower layer of the raw material layer. Further, the mixed raw material and the solid fuel are mixed to the upper side of the interior of the storage vehicle 10 to form the upper layer and the surface layer of the raw material layer.

The upper ore hopper 20 may include various configurations of hoppers to store upper ore therein. The upper ore hopper 20 may be located above the path of travel and spaced upwardly from near one end of the path of travel. A cut outlet may be formed at the lower end of the upper ore hopper 20. The upper ore may fall through the cut-out outlet to the interior bottom of the storage vehicle 10.

The upper ore may be prepared by selecting a sintered ore having a particle size of 8mm to 15mm among the manufactured sintered ores. The upper ore prevents the mixed raw material charged in the storage vehicle 10 from being lost to a grate bar side of a pallet forming a bottom surface (not shown) of the storage vehicle 10 or from being attached to a grate bar.

The first and second loading units 300 and 400 may be arranged above the travel path in a spaced apart manner from the upper ore hopper 20 with respect to the travel direction of the storage vehicle 10. The first loading unit 300 is configured to load the mixed raw material into the storage vehicle 10, and the second loading unit 400 is configured to load the solid fuel into the storage vehicle 10.

The first and second loading units 300 and 400 described above constitute a raw material loading apparatus according to an exemplary embodiment of the present disclosure, and will be described in detail below.

Hereinafter, a raw material loading apparatus according to an exemplary embodiment of the present disclosure will be described in detail with reference to fig. 1 to 4. The raw material loading apparatus according to an exemplary embodiment of the present disclosure includes a first loading unit 300 storing mixed raw materials and a second loading unit 400 storing fuel.

The first loading unit 300 may comprise a first hopper 310, a first hopper gate 320, a drum feeder 330 and a first loading chute 340. In this regard, the first loading chute 340 may have through holes. The through-hole of the first loading chute 340 may be formed by penetrating at least a portion of the first loading chute 340, the at least a portion of the first loading chute 340 being located above the second loading unit 400 in a height direction intersecting the extending direction of the first loading chute 340. .

With the above-described structure, in an exemplary embodiment of the present disclosure, a portion of the mixed raw material of the first loading unit 300 may be distributed to the second loading unit 400 side. For example, the first loading unit 300 may distribute a portion of the mixed raw material dropped into the first loading chute 340 to the second loading unit 400 side through the through-hole of the first loading chute 340.

The first hopper 310 may be positioned above a storage vehicle 10 traveling along a path, such as a travel path. The first hopper 310 may be configured to store the mixed raw materials in the first hopper 310. The first hopper 310 may be formed with a cut-out outlet at a lower end, and the first hopper gate 320 and the drum feeder 330 may be installed at the cut-out outlet.

The first hopper gate 320 may be mounted to be liftable or rotatable on the cut-out outlet of the first hopper 310, and the drum feeder 330 may be mounted to be rotatable on the cut-out outlet. The mixed raw material passes through a first hopper gate 320 installed at a cut outlet of the first hopper 310 and then is fed to a drum feeder 330. Then, the distribution amount of the mixed raw material is adjusted by adjusting the number of revolutions of the drum feeder 330, and the mixed raw material may be dropped and fed to the first loading chute 340.

The first loading chute 340 may be disposed below the first hopper 310 and extend obliquely to form a first conveying path guiding the mixed raw materials. In this regard, the first loading chute 340 may be extended obliquely to form a first conveying path in the following shape in consideration of a falling trajectory or exit rate or exit angle of the mixed raw material: for example, a straight line shape or a curved shape such as a spline shape or a cycloid shape.

The first loading chute 340 may guide the dropping of the mixed raw material using the first conveying path to load the mixed raw material inside the storage vehicle 10. Meanwhile, the mixed raw materials may be sequentially stacked while the mixed raw materials are obliquely dropped and separated in a vertical direction based on the particle size of the mixed raw materials.

That is, according to the inclined structure of the first loading chute 340, the mixed raw material having relatively small particles can be loaded on the inner upper side of the storage vehicle 10, and the mixed raw material having relatively large particles can be loaded on the inner lower side of the storage vehicle 10.

The detailed structure of the first loading chute 340 in which the overall shape is formed as described above will be described below.

The first loading chute 340 may include a plurality of rollers R arranged at least at an underground portion inclined upward with respect to the traveling direction of the storage vehicle 10. In the upper portion of the first loading chute 340, a plurality of rollers R are arranged obliquely upward with respect to the traveling direction of the storage vehicle 10. Otherwise, the upper part is constructed by at least one inclined plate (not shown) extending obliquely upwards with respect to the direction of travel of the storage vehicle 10.

In this regard, the first loading chute 340 may be divided into upper and lower portions based on a predetermined position in the height direction. Alternatively, the first loading chute 340 may be divided into an upper portion and a lower portion based on a predetermined position relative to the direction of travel of the storage vehicle 10. For example, based on the position of the surface layer treatment unit 50, the upstream side of the travel path, which is the opposite side from the ignition furnace 60, may be the lower portion of the first loading chute 340, and the downstream side of the travel path, which is the ignition furnace 60 side, may be the upper portion of the first loading chute 340. Alternatively, the first loading chute 340 may be divided into an upper portion and a lower portion based on the rate of change of the angle of inclination. For example, the upper and lower portions may be distinguished based on the predetermined position of the first loading chute 340 at which the rate of change of the angle of inclination changes from increasing to decreasing or from decreasing to increasing.

The plurality of rollers R may be arranged obliquely at least at the upper portion of the first loading chute 340 to have an inclination angle of, for example, 55 ° to 90 °. Further, the angle of inclination may decrease as the first loading chute 340 descends.

That is, the first loading chute 340 is formed at the upper portion at an inclination angle of 55 ° to 90 ° so that the initial exit velocity (speed) of the mixed raw materials can be fixed at a desired value. Furthermore, the horizontal component of the exit velocity can be fixed at a desired value by reducing the angle of inclination at the lower part.

When the first loading chute 340 is provided as described above, the through-holes of the first loading chute 340 may include a plurality of roller gaps g spaced apart from each other with respect to the direction of travel of the storage vehicle 10.

The plurality of rollers R arranged at least at the lower portion of the first loading chute 340 may be spaced apart from each other at intervals of 3mm to 50 mm. The plurality of rollers R disposed at the upper portion of the first loading chute 340 may be spaced apart from each other at intervals of 3mm to 50mm or less than 3mm or less.

Accordingly, the plurality of rollers R are spaced apart from each other at an interval of 3mm to 50mm at the lower portion of the first loading chute 340, so that the mixed raw material can be dispensed to the second loading unit 400 side at a desired dispensing amount. Further, the mixture of the mixed raw material and the solid fuel may be filled to a desired loading height of the raw material layer. That is, the mixture of the mixed raw material and the solid fuel can be uniformly filled in the upper layer and the surface layer of the raw material layer.

For example, when the roller gap g is less than 3mm, the mixed raw material dropped to the first loading chute 340 may not pass through the roller gap g, or even though the mixed raw material may pass through the roller gap g, the passing amount does not have a meaningful value. That is, when the roller gap g is less than 3mm, the dispensed amount of the mixed raw material passing through the roller gap g and dispensed to the second loading unit 400 side is less than a desired value. Therefore, the mixed raw material may not be uniformly mixed into the upper and surface layers of the raw material layer, and the solid fuel may be loaded in a skewed manner to the surface layer of the raw material layer.

When the roller gap g exceeds 50mm, the dispensed amount of the mixed raw material passing through the roller gap g and dispensed to the second loading unit 400 side is greater than a desired value. Therefore, the loading height of the mixed raw material and solid fuel mixture may be shifted from the upper layer to the lower layer side of the raw material layer, so that the permeability of the raw material layer may be reduced.

Meanwhile, the first loading chute (not shown) according to another embodiment of the present disclosure may include an inclined plate that is inclined upward with respect to the traveling direction of the storage vehicle 10, or the first loading chute may include a plurality of separate inclined plates that extend obliquely upward with respect to the traveling direction of the storage vehicle 10.

For example, a first loading chute (not shown) according to another exemplary embodiment of the present disclosure may comprise at least one inclined plate (not shown) extending obliquely upwards with respect to the direction of travel of the storage vehicle 10 at least at a lower portion of the first loading chute. In this regard, the first loading chute (not shown) according to another exemplary embodiment of the present disclosure may be constituted by at least one inclined plate extending obliquely upward with respect to the traveling direction of the storage vehicle 10, or a plurality of rollers may be arranged at an upper portion of the first loading chute in an obliquely upward manner with respect to the traveling direction of the storage vehicle 10.

When the first loading chute according to another exemplary embodiment of the present disclosure is provided as described above, the through-holes of the first loading chute according to another exemplary embodiment of the present disclosure may include a plurality of slits (not shown) that penetrate the above-mentioned inclined plate at a plurality of positions with respect to the traveling direction of the storage vehicle 10.

Meanwhile, the first loading chute according to another exemplary embodiment of the present disclosure may be formed to have all technical features of the first loading chute 340 according to one exemplary embodiment of the present disclosure. For example, at least the upper portion of the first loading chute according to another exemplary embodiment of the present disclosure may extend at an angle of inclination of 55 ° to 90 ° relative to the storage vehicle 10, and the angle of inclination may decrease towards the lower portion. Furthermore, at least the through-holes formed at the bottom of the first loading chute according to another exemplary embodiment of the present disclosure may have a width of 3mm to 50 mm.

Hereinafter, the second loading unit of the raw material loading apparatus according to an exemplary embodiment of the present disclosure will be described in detail. The second loading unit 400 according to an exemplary embodiment of the present disclosure may include a second hopper 410 and a second loading chute, wherein the second hopper 410 receives the solid fuel in the second hopper 410, and the second loading chute loads the mixture of the solid fuel and the mixed raw material to the storage vehicle 10. In particular, the mixing area a may be formed at least at a portion of the second loading chute, and the mixed raw material dispensed from the through-holes of the first loading chute may pass through the mixing area a. And the mixed raw material can be uniformly mixed with the solid fuel.

In this regard, the mixed raw material distributed to the side of the second loading chute 420 and mixed with the solid fuel may include a mixed raw material having relatively small particles among the entire mixed raw material fed to the first loading chute 340.

With this structure, in one exemplary embodiment of the present disclosure, the mixed raw material and the solid fuel may be uniformly mixed at the second loading unit 400 and may be introduced into the storage vehicle 10. Then, a mixture of the mixed raw material and the solid fuel may be filled into the upper layer and the surface layer of the raw material layer. That is, the mixed raw material and the solid fuel may be uniformly mixed before the mixed raw material and the solid fuel are loaded into the storage vehicle 10.

The second hopper 410 may be spaced above the storage vehicle 10 from the first hopper 310. The second hopper 410 may be configured to store solid fuel in the second hopper 410. The second hopper 410 may have an outlet at a lower end, and a second hopper gate and a fuel feeder (not shown) may be installed at the outlet.

The second hopper gate may be installed on the outlet of the second hopper 410 to be liftable or rotatable, and the fuel feeder may be provided at the outlet of the second hopper 410 to be rotatable or vibratable. The solid fuel is fed to the fuel feeder through a second hopper gate mounted at the outlet of the second hopper 410. Thereafter, the amount dispensed is adjusted by adjusting the number of rotations or vibrations of the fuel feeder, and the solid fuel may fall and be fed to the second loading chute 420.

Meanwhile, in a variation of the present disclosure as shown in fig. 3(a), a plurality of second hoppers 410 may be arranged in the width direction of the travel path. Further, in another variation of the present disclosure as shown in fig. 3(b), a plurality of divided second hopper gates are provided at the outlet of the second hopper 410 and arranged in the width direction of the travel path.

Based on the above structure, in a modification of the present disclosure, the solid fuel may be fed to the second loading chute 420 by adjusting the distribution amount of the solid fuel at a plurality of positions or areas in the width direction of travel. For example, the solid fuel may be classified based on the combustion rate of the solid fuel. In this regard, a solid fuel having a higher burn rate may be selected and fed to the second loading chute 420 in an intermediate position in the width direction of the travel path. Alternatively, the supply amount of the solid fuel may be adjusted at a plurality of positions in the width direction of the travel path to increase the supply amount of the solid fuel at the edge portion in the width direction of the travel path. The solid fuel may then be fed to a second loading chute 420. Since the supply of the solid fuel can be adjusted by being skewed in the width direction, in a modification of the present disclosure, adjustment of the width direction in which the flame propagates can be performed more easily.

Hereinafter, the second loading chute of the second loading unit according to an exemplary embodiment of the present disclosure will be described in detail. The second loading chute 420 may form a second conveying path that is disposed below the first loading chute 340 and the second hopper 410 and extends obliquely to guide the solid fuel. In this regard, the second loading chute 420 may extend obliquely to form a second delivery path in the following shape, taking into account the drop trajectory of the solid fuel: for example, a curved shape such as a straight shape or a spline shape or a cycloid shape.

The second loading chute 420 may guide the dropping of the mixture of mixed raw materials and solid fuel using a second delivery path to load the mixture into the storage vehicle 10. Meanwhile, the mixture may be sequentially stacked while the mixed raw material is obliquely dropped and separated in a vertical direction based on the particle size of the mixture.

That is, by the inclined structure of the second loading chute 420, the mixed raw material having relatively large particles and the solid fuel can be uniformly mixed and charged into the upper layer of the raw material layer, and the raw material having relatively small particles and the solid fuel can be uniformly mixed and charged into the surface layer of the raw material layer. In this regard, the angle of inclination or the length of extension of the second loading chute 420 may be suitably selected to cause the mixed raw materials and the solid fuel to be uniformly mixed and loaded in the upper portion of the storage vehicle 10 at a desired height.

The second loading chute 420 may be spaced apart from the first loading chute 340 relative to the direction of travel of the storage vehicle 10. Thus, at least the lower portion of the second loading chute 420 may face the lower portion of the first loading chute 340, and a mixing region a may be formed at the lower portion 420A of the second loading chute 420. Thus, according to the second loading chute 420 being spaced apart from the first loading chute 340 with respect to the direction of travel of the storage vehicle 10, the mixture of mixed raw materials and solid fuel can be easily loaded without interfering with the loading of the mixed raw materials at the first loading chute 340 and without interfering with each other. Meanwhile, the lower portion 420A of the second loading chute 420 may be disposed on the upstream side of the travel path based on the position of the surface layer processing unit 50. Therefore, the mixture of the mixed raw material and the solid fuel can be easily charged to the upper layer and the surface layer of the raw material layer in the previous position of the surface layer processing unit 50.

The detailed structure of the second loading chute 420, in which the basic structure is formed as described above, will be described in more detail below.

The second loading chute 420 may include at least one inclined plate extending obliquely upward relative to the direction of travel of the storage vehicle 10. In this regard, the second loading chute 420 may comprise a single-piece inclined plate or a plurality of separate inclined plates.

For example, in one exemplary embodiment of the present disclosure, a second loading chute 420 is shown, the second loading chute 420 comprising an upper inclined plate 421 constituting an upper portion 420B and a lower inclined plate 422 constituting a lower portion 420A. In this case, the lower inclined plate 422 may be disposed to face the lower portion of the first loading chute 340 between the lower end portion of the first loading chute 340 and the surface layer processing unit 50. The through-holes of the first loading chute 340 may be disposed above the lower inclined plate 422.

At the same time, the manner of distinguishing the upper and lower portions of the second loading chute 420 may correspond to the manner of distinguishing the upper and lower portions of the first loading chute 340. For example, based on the position of the surface layer treatment 50, the upstream side of the travel path may be the lower portion 420A of the second loading chute 420 and the downstream side of the travel path may be the upper portion 420B of the second loading chute 420.

At least the upper portion of the second loading chute 420 may extend at an angle of inclination having an angle of, for example, 55 ° to 90 ° based on the position of the storage vehicle 10, and the angle of inclination of the second loading chute 420 may decrease as it goes downward.

That is, the second loading chute 420 may be formed with an upper inclined plate 421, the upper inclined plate 421 being constructed at an inclined angle of, for example, 55 ° to 90 ° at the upper portion 420B. Thus, the initial exit rate of the solid fuel can be fixed at a desired value.

Further, the parallel component of the exit rate of the mixture of mixed raw material and solid fuel may be fixed at a desired value by reducing the inclination angle of the lower inclined plate 422 constituting the lower portion 420A of the second loading chute 420 to be smaller than the inclination angle of the upper inclined plate 421.

Hereinafter, the remaining components of the processing apparatus according to one exemplary embodiment of the present disclosure will be described.

The surface layer processing unit 50 may be arranged to pass the upper portion of the storage vehicle 10 in the width direction of the travel path, the surface layer processing unit 50 being spaced apart from the lower portion of the second loading chute 420 with respect to the travel direction of the storage vehicle 10. When the storage vehicle 10 is traveling, the surface layer processing unit 50 contacts the surface layer of the raw material layer, and the surface layer processing unit 50 uniformizes the surface of the surface layer to make the surface height of the surface layer constant in the width direction and in the traveling direction. For example, the surface layer processing unit 50 may include a round bar-shaped or plate-shaped contact member extending in the width direction with respect to the travel path, and a driving device (not shown) for supporting the contact member so as to be moved, lifted, or rotated.

The ignition furnace 60 may be spaced apart from the second loading unit 400 with respect to the traveling direction of the storage vehicle 10, and the ignition furnace 60 may be positioned above the traveling path. The ignition furnace 60 may be formed as a downward spraying flame. When the storage vehicle is traveling, the ignition furnace supplies flame to fire the raw material layer filled in the storage vehicle 10.

A crusher (not shown) and a cooler (not shown) may be arranged near the other end of the travel path where the travel path ends. The crusher may be configured to crush the sintered ore discharged from the storage vehicle 10 into a predetermined particle size. The cooler may be configured to cool crushed sintered ore from the crusher.

The bellows 70 is provided at a lower portion of the traveling path, and a plurality of bellows 70 may be arranged in series with respect to the traveling direction. The bellows 70 may be connected to the interior of the storage vehicle 10 traveling along the travel path. The air bellows 70 may generate a negative pressure to suck the interior of the storage vehicle 10. The flame surface spreads in a direction from the surface layer of the raw material layer charged in the storage vehicle 10 to the surface layer of the air box 70. Thus, the raw material layer can be sintered into a sintered ore.

The exhaust unit 80 may include an exhaust chamber, a dust collector, a blower, and an exhaust port. The exhaust unit 80 provides a strong suction force, for example, a negative pressure, to discharge the exhaust gas sucked at the wind box 70 to the outside. The exhaust chamber includes a passageway through which exhaust gases pass and may be connected to a plurality of bellows 70. The dust collector may be configured to remove dust contained in the exhaust gas and may be connected to an end of the exhaust chamber. The blower may be connected to the dust collector at an opposite side of the exhaust chamber to guide the exhaust gas flowing from the exhaust chamber to the dust collector. The exhaust port is connected to a blower to discharge the exhaust gas to the outside.

Hereinafter, a raw material loading method according to an exemplary embodiment of the present disclosure will be described in detail with reference to fig. 1 to 4. In this regard, detailed descriptions and repeated contents according to the exemplary embodiments and the modifications will be omitted or briefly described below.

A raw material loading method according to an exemplary embodiment of the present disclosure includes: dropping the mixed raw material to a first conveyance path and guiding the mixed raw material into a storage vehicle; dropping the solid fuel to a second delivery path and directing the solid fuel into a storage vehicle; and mixing the mixed raw material and the solid fuel in some regions of the second conveyance path.

First, raw materials and fuel are prepared. In this regard, the raw materials and fuels can be prepared from a variety of raw materials and fuels, which correspond to a number of processes to which the present disclosure can be applied. In an exemplary embodiment of the present disclosure, the raw materials and the fuel are prepared as follows.

First, a raw material such as a mixed raw material 91 is provided. Raw materials such as fine iron ore, limestone, fine coke, and anthracite are mixed and humidified to prepare a mixed raw material having a predetermined particle size. In this regard, the mixed raw material includes a mixed raw material for manufacturing sintered ore. Further, a fuel such as solid fuel 92 is provided. For example, at least one of fine coke and anthracite coal is provided as a solid fuel.

In this regard, in one embodiment of the present disclosure, the amount of solid fuel to be mixed into the mixed raw material to manufacture the sintered ore may be reduced, and the reduced amount of solid fuel may be prepared to be used as the solid fuel used in the second loading unit 400. That is, some of the solid fuel is premixed in the mixed raw material, and the remaining solid fuel is separately prepared. Thereafter, the remaining solid fuel is loaded into the upper layer B2 and the surface layer B3 of the raw material layer B by the second loading unit 400. In this regard, the amount of the solid fuel that is not mixed in the mixed material and separately prepared may be determined in consideration of the combustion heat, the combustion rate, and the like to be supplied to the upper and surface layers of the raw material layer.

Thereafter, the mixed raw material 91 is charged into the first hopper 310 of the first loading unit 300, and the solid fuel 92 is charged into the second hopper 410 of the second loading unit 400.

Thereafter, the mixed raw material 91 is inclined downward through the first conveying path using the first loading chute 340 of the first loading unit 300 extending obliquely upward with respect to the traveling direction of the storage vehicle 10. Thus, the mixed raw material is guided to the inside of the storage vehicle 10. On the other hand, the upper ore is charged to a predetermined height on the inner bottom surface of the storage vehicle 10, and the mixed raw material 91 is charged to the upper side of the upper ore.

The mixed raw materials are directed to the interior of the storage vehicle 10 and the solid fuel is simultaneously directed to the interior of the storage vehicle 10. Specifically, by obliquely dropping the solid fuel 92 to the second conveying path using the second loading chute 420 of the second loading unit 400, which second loading chute 420 of the second loading unit 400 is spaced from below the first conveying path in the traveling direction of the storage vehicle 10 and extends obliquely upward, the mixed raw material is guided into the traveling storage vehicle 10.

The mixed raw material 91 is charged into the interior of the storage vehicle 10 on the upstream side of the traveling path earlier than the solid fuel 92. The solid fuel 92 is charged into the interior of the storage vehicle 10 later than the mixed raw material 91 and forms an upper layer B2 and a surface layer B3 of the raw material layer B.

Thus, in one exemplary embodiment of the present disclosure, the solid fuel may be introduced into the storage vehicle 10 using a second conveyance path that is spaced below the first conveyance path so as to be distinguished from the first conveyance path serving as a loading path for the mixed raw material. Thus, the mixed raw material can be easily charged without being disturbed by the solid fuel.

Meanwhile, the process of introducing the solid fuel 92 into the storage vehicle 10 may include the following processes: a process of adjusting a supply amount of the solid fuel supplied to the second conveying path through a plurality of positions in a width direction of the second conveying path; and a process of dropping the solid fuel to the second conveyance path.

Through this process, the load amount of the solid fuel can be adjusted through a plurality of positions in the width direction of the travel path. For example, in one embodiment of the present disclosure, the solid fuel is adjusted to be more packed at the opposite both side ends in the width direction of the travel path.

For example, when the raw material layer B is divided into five equal parts in the longitudinal direction, the strength and morphology of the sintered ore are uniformly distributed in each equal part of the widthwise edge portion. Thus, in one exemplary embodiment of the present disclosure, the raw material layer B may be divided into five equal parts in the longitudinal direction, so that more solid fuel is charged to each equal part of the edge portions in the width direction.

On the other hand, the surface of anthracite coal is hydrophobic compared to the surface of fine coke, and thus anthracite coal has a low water holding capacity. In addition, anthracite has a high processing rate compared to fine coke because: in contrast to anthracite coal, the particle size of which is adjusted by simple crushing, fine coke is subjected to a carbonization process at high temperature. In addition, fine coke has more fixed carbon than anthracite. Due to these physical and chemical properties, the combustion rate of fine coke is faster than that of anthracite. Therefore, when anthracite and fine coke are charged as solid fuels to the raw material layer without distinction, it is difficult to utilize the inherent characteristics.

Thus, in an exemplary embodiment of the present disclosure, the solid fuel 92 is classified based on a characteristic, such as a burn rate, during introduction to the interior of the storage vehicle 10. Therefore, the solid fuel having a relatively high burning rate such as fine coke is supplied to the central portion of the second conveyance path having relatively poor ventilation and obliquely falls to the second conveyance path.

Further, in the process of introducing the solid fuel 92 into the storage vehicle 10, the solid fuel is classified based on a characteristic such as a combustion rate, and the solid fuel such as anthracite having a relatively low combustion rate is supplied to the edge portion of the second conveying path and obliquely falls to the second conveying path.

Through this process, the combustion imbalance of the raw material layer B in the width direction of the travel path can be solved.

For example, conventionally, when the firing temperature at the center of the raw material layer B is in the range of 1128 ℃ to 1289 ℃, the firing temperature at the widthwise ends of the raw material layer B is in the range of 594 ℃ to 1174 ℃. In one exemplary embodiment of the present disclosure, a temperature deviation between a central portion and width-directional edge portions of the raw material layer B may be significantly reduced, and a firing temperature of the width-directional edge portions of the raw material layer B may be increased to approach a firing temperature of the central portion.

Further, conventionally, the edge portion in the width direction of the raw material layer B is rapidly cooled, so that the firing heat is insufficient. Thus, the collection rate of the sintered ore from the edge portion in the width direction is, for example, about 64.1%. At this time, the sintered ore strength was 45.5%, and the morphology of less than-10 mm was about 80.5%. In one exemplary embodiment of the present disclosure, the sintered ore collection rate, the sintered strength, and the morphology of less than-10 mm at the edge portions in the width direction of the raw material layer B may be increased to a sintered ore level of the finished material close to the central portion of the raw material layer B.

The solid fuel is guided into the storage vehicle 10 and at the same time the mixing of the raw material and the solid fuel takes place at some areas of the second conveying path. Specifically, a part of the mixed raw material that obliquely drops to the first conveying path is passed through a through hole formed through the first conveying path and distributed to the second conveying path side. Thereafter, the mixed raw material distributed to the second conveying path side is transferred to some areas of the second conveying path, for example, the mixing area a side and mixed with the mixed raw material. Thereafter, a mixture of the mixed raw material and the solid fuel was filled to the upper layer B2 and the surface layer B3 of the raw material layer B.

Thus, in one exemplary embodiment of the present disclosure, a portion of the mixed raw material dropped to the first conveying path is passed through the second conveying path side to be mixed with the solid fuel, and then charged to the upper layer B2 and the surface layer B3 of the raw material layer B.

Thus, the solid fuel can be charged to a desired loading height in the upper layer B2 and the surface layer B3 of the raw material layer B and uniformly mixed into the mixed raw material. In particular, it is possible to prevent the solid fuel from being loaded into the upper layer B2 and the surface layer B3 of the raw material layer B in a skewed manner or being locally loaded at a predetermined position and a predetermined height. Thus, the raw material layer B can be prevented from irregularly burning when the raw material layer B is adjusted to burn.

Further, since a part of the mixed raw material 91 may be mixed with the solid fuel 92 and may be uniformly charged to the upper layer B2 and the surface layer B3 of the raw material layer B, the combustion efficiency and the sintered ore collection rate at the upper layer B2 and the surface layer B3 of the raw material layer B may be improved. That is, the combustion heat at the upper layer B2 and the surface layer B3 of the raw material layer B may be used to sinter the mixed raw material 91 charged to the upper layer B2 and the surface layer B3 of the raw material layer B.

In this regard, the mixed raw material to be mixed with the solid fuel may be in a fine state or have a particle size of 3mm to 50 mm. The particle size of the mixed raw material mixed into the solid fuel can be adjusted by adjusting the size and position of the roller gap g of the second loading chute 340.

On the other hand, the process of mixing the mixed raw material 91 and the solid fuel 92 at some regions of the second conveying path includes: a process of adjusting the dispensing amount of the mixed raw material dispensed to the second conveying path side, and a process of dispensing a part of the mixed raw material to the second conveying path side.

Thus, by adjusting the dispensing amount of the mixed raw material guided to the second conveying path side, the loading height of the mixture of the mixed raw material and the solid fuel can be adjusted to a desired height. For example, increasing the distribution amount of the mixed raw material guided to the second conveyance path side enables formation of a layer of the mixture of the mixed raw material and the solid fuel at a lower height based on the bottom surface of the storage vehicle 10. On the other hand, when the distribution amount of the mixed raw material guided to the second conveyance path side is reduced, the layer of the mixed raw material and the solid fuel can be formed at a higher level based on the bottom surface of the storage vehicle 10.

The storage vehicle 10 traveling along the traveling path loads the raw material layer B in the storage vehicle 10 while passing through the first and second loading units 300 and 400. Thereafter, the storage vehicle 10 passes below the surface layer processing unit 50, at which time the surface layer processing unit 50 is brought into contact with the surface of the surface layer B3 to flatten the surface layer B3, so that the surface of the surface layer B3 is uniform in the width direction.

Thereafter, the storage vehicle 10 travels along a travel path and passes under the ignition furnace 60. At this time, the raw material layer B is ignited and starts sintering. Thereafter, air is forcibly drawn under the storage vehicle 10 to diffuse flames from the upper portion to the lower portion of the raw material layer B.

As the storage vehicle 10 travels along the travel path, the raw material layer B is manufactured as sintered ore after the sintering and cooling process. Thereafter, the storage vehicle 10 is discharged during the entrance into the return path and may be transported to a process such as a ironmaking process.

As described above, the raw material loading apparatus and the raw material loading method according to one exemplary embodiment of the present disclosure may include the second conveying path disposed below the first conveying path, and may uniformly feed the solid fuel and the mixed raw material into the upper layer and the surface layer of the raw material layer by using the second conveying path.

Further, the raw material loading apparatus and the raw material loading method according to an exemplary embodiment of the present disclosure may distinguish the type and the loading amount of the solid fuel in the width direction of the traveling path, and may classify the solid fuel based on the particle size of the solid fuel and may distinguish the loading height of the solid fuel.

In this way, one exemplary embodiment of the present disclosure provides the following technical features: these technical features serve to reduce the ratio of solid fuel in the mixed raw material, increase the collection rate of sintered ore at the upper layer of the raw material, and significantly reduce the difference in quality between the finished material sintered ore in the width direction of the travel path. Further, one embodiment of the present disclosure provides technical features for solving the heat imbalance and insufficient heat at the upper and surface layers of the raw material layer. Accordingly, quality deviation of the manufactured sintered ore can be minimized.

Fig. 5 is a graph illustrating the detailed structure of the first loading chute according to an exemplary embodiment of the present disclosure. In this regard, in the graph of fig. 5, the horizontal axis represents the position information of the rollers constituting the first loading chute, and the vertical axis represents the roller gap information of the rollers constituting the first loading chute.

Referring to fig. 2 and 4 to 5, a raw material loading apparatus and a raw material loading method according to an exemplary embodiment of the present disclosure are applied to a sintered ore manufacturing process to manufacture sintered ore. Then, a detailed structure of the sintered ore-based apparatus was obtained. The detailed structure of the raw material loading apparatus obtained will be described focusing on the positions of the rollers and the size of the roller gap.

In this regard, the following description of the location of the rollers and the size of the roller gap is intended to aid in understanding the present disclosure and is not intended to be limiting.

First, a raw material loading device and a processing apparatus according to an embodiment of the present disclosure are provided. In this regard, the first loading chute 340 is arranged in the following configuration: in this structure, a plurality of rollers R are arranged at the upper and lower portions of the first loading chute 340 in sequence. Thereafter, when the roll gap (g) between the plurality of rolls R can be made different, the sintered ore manufacturing process is repeatedly performed. In this regard, the raw material layer is loaded to form a very large thickness of about 800mm or more, wherein 10 to 30% of the raw material layer is formed as an upper layer and 5 to 10% of the raw material layer is formed as a surface layer. In addition, the upper ore occupies 5 to 10% of the height of the raw material layer. The processing conditions are adjusted so that the effective sintered portion occupies 60% to 80% of the height of the raw material layer. Solid fuels comprising fine coke and various dusts comprising a heat source are provided.

The production of the sintered ore is repeatedly performed under predetermined process conditions to obtain a production result thereof. Fig. 5 shows a detailed structure of the raw material loading device at this time. In this drawing, the detailed structure of the raw material loading apparatus shown in the graph is: detailed structure of the raw material loading apparatus when the collection rate and strength in the upper and surface layers of the manufactured sintered ore are relatively improved. Meanwhile, the numerical values shown in fig. 5 are values included in the detailed structure of the first loading chute described in the raw material charging device and the raw material loading method according to the embodiment of the present disclosure and the modified example thereof. The technical meaning of the numerical values has been fully explained above. Thus, each numerical value shown in fig. 5 is briefly described below.

Among the plurality of rollers R forming the structure of the first loading chute 340, the roller disposed at the lowest elevation is referred to as a first roller R1, and the roller positioned adjacent to the first roller R1 and at the second lowest elevation is referred to as a second roller R2. In this way, the number of the rollers R is determined in order. The roller at the highest position becomes the nth roller Rn.

In the graph of fig. 5, the roll gap g between the rolls R is plotted for the rolls from the first roll of the lowest level to the fifteenth lowest level.

In the graph of fig. 5, the roller gap g between the rollers R varies according to the downward inclination angle of the first loading chute 340. In this respect, the following is confirmed: when the size of the roll gap g is reduced as the inclination angle of the arrangement of the rolls R is increased from 25 ° to 40 °, the collection rate and strength in the upper and surface layers of the manufactured sintered ore can be relatively improved.

Furthermore, the graph in fig. 5 shows that: the size of the roll gap is from the roll gap g between the first roll R1 and the second roll R2_1,2Continuously decreases to a roll gap g between the third roll R3 and the fourth roll R4_3,4And the size of the roll gap is from the roll gap g between the third roll R3 and the fourth roll R4_3,4Discontinuously decreases to the roll gap g between the fourth roll R4 and the fifth roll R5_4,5. In this regard, the rear end D of the discontinuous region C of roller gap size serves as a reference line for distinguishing the upper and lower portions of the first loading chute 340. The surface layer processing unit 50 is installed at the rear end D of the discontinuous region C of the roll gap size. Thus, the mixed raw material dropped on the first loading chute is discharged from the roller gap g between the first roller R1 and the second roller R2_1,2To the roll gap g between the third roll R3 and the fourth roll R4_3,4Sequentially pass through and are then distributed into the mixing zone a of the second loading chute 420, and as the mixed raw material passes through the roller gap g between the fourth roller R4 and the fifth roller R5_4,5When the distribution of (2) is suppressed, the production of the sintered ore is smoothly performed. Thus, the collection rate and strength in the upper and surface layers of the manufactured sintered ore are relatively improved.

In order to better understand the technical features presented in the present disclosure, the following examples illustrate a raw material loading device according to a comparative example of the present disclosure. Further, the operation and results of the raw material loading apparatus according to the comparative example were compared with those of the raw material loading apparatus according to the present example.

Fig. 6 is a flowchart showing an operation manner of a raw material loading apparatus according to a comparative example of the present disclosure therein.

In the comparative example of the present disclosure, the mixed raw material loading unit 1 and the solid fuel loading unit 3 are disposed above the sintering vehicle 5. The solid fuel nozzles 4 are arranged on the top surface of the mixing material chute 2. In this way, the raw material loading device is provided.

When the loading path of the mixed raw material and the loading path of the solid fuel overlap in one path, the mixed raw material 6 and the solid fuel 7 may not be mixed as shown in the drawing and may form separate layers that are sequentially injected into the sintering vehicle 5.

In this case, the solid fuel 7 charged on the upper face of the mixed raw material 6 does not sufficiently contribute to the sintering of the upper layer of the mixed raw material 6 but may be consumed through combustion. Therefore, it is difficult to generate a melt in the upper portion of the mixed raw material 6. Further, the permeability is made low by forming a layer of the solid fuel 7 on the upper surface of the mixed raw material 6. In particular, fine solid fuels having a diameter of 1mm or less have a relatively high burning rate, and therefore these fine solid fuels burn rapidly and allow the formation of a thinner combustion zone, which may not be used as a heat source. Therefore, in the above-described comparative example of the present disclosure, the sintered ore having sufficient strength is not produced in the surface layer and the upper layer of the mixed raw material, and thus the sintered ore is considered to be the return ore. Thus, the collection rate of the completed sintered ore is relatively low.

On the other hand, in the embodiment of the present disclosure, the first conveyance path and the second conveyance path are provided to be spaced apart from each other in the vertical direction. Therefore, the mixed raw material falling on the first conveying path may partially fall on the second conveying path. Thus, the mixed raw material can be easily mixed with the solid fuel, and the mixture between the mixed raw material and the solid fuel can be smoothly loaded to the upper layer and the surface layer of the raw material layer. Therefore, in the present embodiment, the mixed raw material is sufficiently sintered in the upper layer and the surface layer of the raw material layer, and thus, the collection rate of the completed sintered ore is considerably high.

It should be noted that the above-mentioned embodiments of the present disclosure are provided for explaining the present disclosure and are not intended to limit the present disclosure. The present disclosure may be embodied in various forms within the scope of the claims and the technical equivalents. One of ordinary skill in the art will recognize that the present disclosure may have various embodiments within the scope of the technical idea of the present disclosure.

Claims

1. A raw material loading device comprising:

a first hopper disposed above a storage vehicle traveling along a path;

a first loading chute disposed below the first hopper and extending obliquely, wherein the first loading chute has a through hole defined therethrough in a direction intersecting the direction of extension of the first loading chute;

a second hopper disposed above the storage vehicle and spaced apart from the first hopper; and

a second loading chute disposed below the second hopper and the first loading chute and extending obliquely,

wherein the second loading chute comprises an upper inclined plate and a lower inclined plate, the lower inclined plate being located below the upper inclined plate,

the through-holes of the first loading chute are located above the lower inclined plate so as to form a mixing area on the lower inclined plate, and

the inclination angle of the lower inclined plate is smaller than that of the upper inclined plate.

2. The raw material loading apparatus of claim 1 wherein the first loading chute includes an upper portion and a lower portion, wherein at least the lower portion of the first loading chute includes at least one inclined plate extending obliquely upward relative to a direction of travel of the storage vehicle,

wherein the through hole includes a plurality of slits that pass through the inclined plate at a plurality of positions spaced apart from each other of the inclined plate in the traveling direction of the storage vehicle.

3. Raw material loading apparatus according to claim 1 wherein the first loading chute comprises an upper portion and a lower portion, wherein at least the lower portion of the first loading chute comprises a plurality of rollers arranged in an upwardly inclined manner with respect to the direction of travel of the storage vehicle,

wherein the through-hole comprises a plurality of roller gaps defined between some or all of the rollers spaced apart from each other in the direction of travel of the storage vehicle.

4. Raw material loading device according to claim 2 or 3, wherein at least the upper portion of the first loading chute extends or is oriented at an angle of 55 ° to 90 ° relative to the storage vehicle,

wherein the angle of inclination of the first loading chute decreases from the upper portion to the lower portion.

5. Raw material loading apparatus according to claim 3 wherein the plurality of rollers arranged at least in the lower portion of the first loading chute are spaced from each other by a spacing of from 3mm to 50 mm.

6. The raw material loading device according to claim 1, wherein the second hopper is provided in plurality so as to be arranged in a width direction of the path.

7. The raw material loading apparatus according to claim 1, wherein a plurality of divided gates are arranged in the outlet of the second hopper, the gates being arranged along the width direction of the path.

8. The raw material loading device as recited in claim 1, wherein the upper inclined plate and the lower inclined plate extend obliquely upward with respect to a traveling direction of the storage vehicle.

9. Raw material loading apparatus according to claim 8 wherein at least an upper portion of the second loading chute extends or is oriented at an angle of 55 ° to 90 ° relative to the storage vehicle,

wherein the angle of inclination of the second loading chute decreases from the upper to lower portion of the second loading chute.

10. The raw material loading apparatus of claim 8 wherein the second loading chute is spaced from the first loading chute in the direction of travel of the storage vehicle such that a lower portion of the second loading chute faces a lower portion of the first loading chute.

11. Raw material loading device according to claim 1, 8 or 10, wherein the raw material dispensed from the through-holes of the first loading chute reaches the mixing area.

12. A raw material loading method for loading raw material into a storage vehicle traveling along a path, the method comprising:

dropping the stock material onto a first conveyance path and directing the stock material into the storage vehicle;

dropping fuel onto a second delivery path and directing the fuel into the storage vehicle; and

mixing the raw material and the fuel in at least a portion of the second conveyance path,

wherein a portion of the raw material dropped to the first conveying path is dropped on a mixing area formed in a lower portion of the second conveying path, and the raw material is mixed with the fuel in the mixing area, wherein an inclination angle of the lower portion of the second conveying path corresponding to the mixing area is smaller than an inclination angle of an upper portion of the second conveying path.

13. The stock material loading method as set forth in claim 12, wherein dropping the stock material onto the first conveyance path and directing the stock material into the storage vehicle comprises: dropping the raw material obliquely onto the first conveyance path extending obliquely upward with respect to a traveling direction of the storage vehicle; and directing the stock material into the storage vehicle.

14. The raw material loading method as recited in claim 13, wherein dropping the fuel onto the second delivery path and directing the fuel into the storage vehicle comprises: dropping the fuel obliquely onto the second transportation path arranged below and spaced apart from the first transportation path and extending obliquely upward with respect to the travel direction of the storage vehicle; and directing the fuel into the storage vehicle.

15. The raw material loading method as recited in claim 12, wherein dropping the fuel onto the second delivery path and directing the fuel into the storage vehicle comprises: adjusting a supply amount of fuel to be supplied to the second conveying path based on a plurality of positions in a width direction of the second conveying path; and dropping the fuel obliquely to the second delivery path.

16. The raw material loading method as recited in claim 12, wherein dropping the fuel onto the second delivery path and directing the fuel into the storage vehicle comprises: classifying the fuel based on a combustion rate of the fuel; and dropping the fuel obliquely to the second delivery path so that the fuel having a relatively high combustion rate is supplied to the center of the second delivery path.

17. The raw material loading method as recited in claim 12, wherein mixing the raw material and the fuel in at least a portion of the second conveyance path includes:

dispensing a portion of the stock material that has fallen obliquely to the first conveying path toward the second conveying path; and

directing the raw material dispensed to the second delivery path to the mixing area and mixing the raw material and the fuel at the mixing area.

18. The raw material loading method as recited in claim 17, wherein mixing the raw material and the fuel in at least a portion of the second conveyance path includes: dropping a portion of the raw material, which is dropped obliquely to the first conveying path, into a through-hole defined through the first conveying path.

19. The raw material loading method as recited in claim 17, wherein mixing the raw material and the fuel in at least a portion of the second conveyance path includes: a portion of the raw material that obliquely drops to the first conveying path is dispensed to a second conveying path side while adjusting the amount of the raw material to be dispensed to the second conveying path.