KR20170053460A - Charging apparatus and method for raw material - Google Patents

Abstract

The present invention relates to a charging apparatus for a raw material and a charging method for a raw material applied to the same, wherein the charging apparatus comprises: a first hopper arranged at an upper side of a storage machine driven along a path; a first charging chute extended to be inclined at a lower side of the first hopper, and having an opening portion penetrated in a direction crossing over an extension direction; a second hopper arranged to be spaced from the first hopper at an upper side of the storage machine; and a second charging chute extended to be inclined at a lower side of the second hopper and the first charging chute. According to the present invention, provided are the charging apparatus and the method for a raw material, which can improve a recovery rate and strength of sintered ore in an upper portion of a raw material layer.

Description

Technical Field [0001] The present invention relates to a charging apparatus and method,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a raw material charging apparatus and method, and more particularly, to a raw material charging apparatus and method capable of uniformly mixing and charging a solid fuel on a raw material layer to improve the recovery rate and strength of sintered ores .

Sintered ores are used as raw materials in the blast furnace. The sintered ores are produced by mixing a sintering raw material such as iron ore with a solid fuel, burning the solid fuel, and sintering the iron ore with the heat of combustion. A manufacturing process of the sintered ores to which such a method is applied will be described below.

First, a large amount of various raw materials, additives, and coke are extracted from the raw material reservoir in an appropriate amount. Then, the extracted raw materials and additives and cokes are mixed in a mixer together with moisture, and they are transported to a belt conveyor and temporarily stored in a surge hopper. Then, the upper light temporarily stored in the upper light hopper and the blend material temporarily stored in the surge hopper are charged into the sintering bogie. Thereafter, the sintered bogie is passed to the lower side of the ignition furnace to ignite the upper portion of the raw material mixture. Thereafter, the sintered bogie is moved to the side of the light emitting portion, and air is forcedly sucked to the lower portion of the blended raw material to propagate the flame to the lower portion of the blended raw material.

At this time, the heat of combustion of the coke transferred to the lower portion of the blended raw material is discharged to the suction blower after the raw material is dried and calcined, and the blended raw material of the burned portion is cooled and sintered by forced air.

Before the sintered bogie reaches the light shading portion, the blended material loaded on the sintered bogie is sintered. Thereafter, when the sintered bogie reaches the light-shining portion, the sintered light having been sintered is distributed to the light-distributing portion. Thereafter, the sintered ores are crushed to a certain size or less in the crusher, loaded on the cooling apparatus and cooled. Then, the sintered ores are transported to the blast furnace and used as raw materials in the sintering process. For example, a downwind Dwight-Lloyd type sintering apparatus is applied to the above-mentioned process for producing the sintered ores.

On the other hand, in the Dwight-Lloyd type sintering machine of the downward sucking type, when the blended raw materials are sintered by the above process, there is a problem that the amount of heat is insufficient at the upper part of the raw material layer of the blended raw material and excess heat is accumulated at the lower part of the raw material layer. If the amount of heat is insufficient at the upper part of the raw material layer of the blended raw material and the amount of heat is excess at the lower part of the raw material layer, the sintered light produced at the upper and lower parts of the raw material layer can not be sintered with sufficient strength.

KR 10-2004-0088781 A

The present invention provides a raw material charging apparatus and method capable of improving the recovery rate and strength of the sintered ores in the upper portion of the raw material layer.

The present invention provides a raw material charging apparatus and method that can uniformly mix and charge a blending raw material and a solid fuel on an upper portion of a raw material layer.

The present invention provides a raw material charging apparatus and method capable of controlling charging conditions of a solid fuel in a width direction of a raw material layer.

A raw material charging apparatus according to an embodiment of the present invention includes: a first hopper disposed on an upper side of a reservoir running along a path; A first charging chute extending obliquely from a lower side of the first hopper and having an opening penetrating in a direction intersecting the extending direction; A second hopper disposed above the reservoir and spaced apart from the first hopper; And a second charging chute extending obliquely below the second hopper and the first charging chute.

Wherein the first charging chute includes at least one swash plate extending upward at an upper portion in a direction in which the reservoir runs, the opening being formed at a plurality of positions spaced apart in the direction in which the reservoir runs, through the swash plate And a plurality of slits.

Wherein the first loading chute includes a plurality of rollers arranged at least in a lower portion in an upward sloping manner in a direction in which the reservoir runs, and the opening is formed such that a part or all of the plurality of rollers are spaced apart from each other And may include a plurality of roll gaps.

At least the upper portion of the first charging chute may be extended or arranged at an angle of 55 to 90 degrees with respect to the reservoir, and the inclination angle may decrease as the first charging chute is lowered.

The plurality of rollers arranged at least at the lower portion of the first charging chute may be spaced from each other by an interval of 3 mm to 50 mm.

The plurality of second hoppers may be arranged in the width direction of the path.

The outlet of the second hopper may have a plurality of divided gates arranged in the width direction of the path.

The second charging chute may include at least one swash plate, and the swash plate may extend upwardly sloping in the direction in which the reservoir runs.

At least the upper portion of the second charging chute may extend at an angle of 55 to 90 degrees with respect to the reservoir, and the inclination angle may decrease as the second charging chute is lowered.

The second charging chute may be spaced apart from the first charging chute in a direction in which the reservoir runs, and the lower portion may face a lower portion of the first charging chute.

The second charging chute may have a mixing section formed at least in a part thereof, and a raw material dispensed from the opening of the first charging chute may pass through the mixing section.

A method of charging a raw material according to an embodiment of the present invention is a method of charging a raw material into a storage device traveling along a path, comprising the steps of: dropping a raw material through a first conveyance path and guiding the raw material into the reservoir; Dropping the fuel into the second conveyance path and guiding the fuel to the inside of the reservoir; And mixing the raw material and fuel in a section of the second conveyance path.

The step of guiding the raw material to the inside of the reservoir includes a step of sloping the raw material into the inside of the reservoir by the first conveyance path extending upward in an inclining direction of the reservoir .

The step of guiding the fuel to the inside of the reservoir includes dropping the fuel obliquely by a second long conveying path extending upward from the lower side of the first conveying path in the running direction of the reservoir, To the inside of the optical disc.

Wherein the step of guiding the fuel to the inside of the reservoir adjusts a supply amount of the fuel supplied to the second transport path by a plurality of positions in the width direction of the second transport path and tilts the fuel to the second transport path A dropping process.

The step of guiding the fuel to the inside of the reservoir includes dividing the fuel by the burning rate, supplying the fuel having a relatively high combustion speed to the central portion of the second conveyance path, and dropping the fuel at an inclined angle to the second conveyance path Process.

Wherein the step of mixing the raw material and the fuel in a part of the second conveyance path includes the steps of discharging a part of the raw material falling obliquely to the first conveyance path toward the second conveyance path side; And mixing the raw material dispensed to the second transport path side with the fuel via a portion of the second transport path.

And the step of mixing the raw material and the fuel in the section of the second conveyance path includes the step of dropping a part of the raw material falling obliquely to the first conveyance path into the opening formed through the first conveyance path .

Wherein the step of mixing the raw material and the fuel in the section of the second conveyance path includes adjusting a dispensed amount of the raw material dispensed to the second conveyance path side and controlling a part of the raw material falling obliquely to the first conveyance path, And a process of dispensing to the path side.

According to the embodiment of the present invention, the solid fuel can be uniformly charged into the upper portion of the raw material layer in the height direction, and the charge condition can be controlled differently in the width direction. From this, it is possible to improve the recovery rate and strength of the sintered ores at the upper portion of the raw material layer.

For example, when the present invention is applied to a sinter ore production facility of a steel mill, the raw material and the solid fuel can be mixed in the upper layer and the surface layer of the raw material layer in the course of charging the raw material layer into the interior of the reservoir. Specifically, a second conveying path is provided below the first conveying path, and a part of the material to be mixed is dropped and mixed into the second conveying path by using the second conveying path. In this way, It is possible to uniformly mix and supply the solid fuel and the material mixture. At this time, the fine blending raw material can be mixed with the upper layer and the surface layer together with the charging of the solid fuel.

Further, it is possible to charge the solid fuel by controlling the charging condition of the solid fuel in the width direction of the raw material layer. Specifically, the type and amount of the solid fuel can be varied in the width direction of the traveling path, and the particle size of the solid fuel can be classified to vary the charging height of the solid fuel.

From this, it is possible to reduce the ratio of the solid fuel in the blended raw material, to increase the recovery rate of the sintered ores in the upper layer of the raw material layer, and to significantly reduce the quality difference of the sintered ores in the width direction of the traveling path. In addition, it is possible to eliminate heat imbalance and insufficient heat quantity in the upper layer and the surface layer of the raw material layer. As a result, the quality variation of the sintered ores produced can be minimized.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view of a processing facility to which a raw material charging apparatus and method according to an embodiment of the present invention is applied; Fig.
2 is a view showing a raw material charging apparatus according to an embodiment of the present invention.
3 is a view showing a raw material charging apparatus according to a modified example of the present invention.
4 is a view illustrating an operation of a raw material charging apparatus according to an embodiment of the present invention.
5 is a graph showing a detailed structure of a charging suit according to an embodiment of the present invention.
6 is a view showing a manner of operation of a raw material charging apparatus according to a comparative example of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described below, but may be embodied in various forms. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. The drawings may be exaggerated or enlarged to illustrate embodiments of the present invention, wherein like reference numerals refer to like elements throughout.

Terms used to describe embodiments of the present invention are defined as follows. First, in the embodiment of the present invention, 'upper' is defined as a part of the upper part of the object, and 'lower part' is defined as a lower part of the object. That is, 'upper' and 'lower' are the parts included in 'object to explain'. On the other hand, in the embodiment of the present invention, 'upper side' is defined as an upper space or region of the object, and 'lower side' is defined as a lower space or region of the object. In this case, 'upper side' and 'lower side' are not included in the 'object to be explained', but are not included in the 'object to be explained' Spaced, predetermined space or area.

The present invention relates to a raw material charging apparatus and method for charging a raw material of various particle sizes in a vertical segregation manner in a reservoir traveling along a path. Hereinafter, embodiments of the present invention will be described in detail with reference to a sinter ore manufacturing facility of a steelworks. However, the present invention can be applied to a variety of processing facilities for loading and processing a processed material by a loading apparatus running in a predetermined direction, a process using the same, and the like.

FIG. 1 is a schematic view showing a processing facility to which a raw material charging apparatus and method according to an embodiment of the present invention is applied, and FIG. 2 is a schematic diagram showing a raw material charging apparatus according to an embodiment of the present invention. FIG. 3 (a) is a schematic view showing a second charging chute of a raw material charging apparatus according to a modification of the present invention, and FIG. 3 (b) is a schematic view showing a second charging chute of a raw material charging apparatus according to another modification of the present invention Fig. 4 is a process diagram showing an operation of the raw material charging apparatus according to the embodiment of the present invention.

1 to 4, a processing facility according to an embodiment of the present invention will be described in detail. The processing facility according to the embodiment of the present invention includes a reservoir 10, an upper hopper 20, a first weft 300, a second weft 400, a surface treatment 50, A wind box 70, and an exhaust part 80. The wind box 70 includes a windshield 60, a windbox 70,

The reservoir 10 may include a bogie formed to be able to travel in one direction along the path. A space may be formed in the reservoir 10 and an upper portion thereof may be opened upward so that a space formed inside the reservoir 10 may communicate with the outside. A plurality of reservoirs 10 may be provided and connected in an endless structure in succession along the path.

The path includes a traveling path on the upper side and a return path on the lower side. The reservoir 10 can be run in one direction along the travel path on the upper side of the path. The reservoir 10 may be reversed in one direction along the return path at the lower side of the path. The reservoir 10 travels along a traveling path, and a raw material layer can be formed by charging a processed material into the reservoir. The raw material layer formed inside the reservoir 10 may be manufactured as sintered light through sintering and cooling processes while traveling in one direction along a traveling path. Thereafter, the sintered ores can be shined from the reservoir 10 in the course of the passage of the reservoir 10 into the return path. After the light distribution is completed, the reservoir 10 may be returned to the return path, and then returned to the traveling path.

The processed product may be loaded into the interior of the reservoir 10 through the open top of the reservoir 10. The treatment may comprise a feedstock such as a blend of raw materials and a fuel such as a solid fuel. The blending raw material may be a blending raw material for producing the sintered ores, and the solid fuel may be a solid fuel used for producing the sintered ores. The mixing material may be charged into the lower portion of the reservoir 10 to form a lower layer of the raw material layer. In addition, the mixing material and the solid fuel are mixed and charged in the upper portion of the reservoir 10 to form the upper layer and the surface layer of the raw material layer.

The upper light hopper 20 may include various types of hoppers that are configured to store the upper light therein. The upper light hopper 20 may be located on the upper side of the traveling path, but may be spaced upward from the vicinity of one side end where the traveling path starts. The lower end of the upper light hopper 20 may be provided with a cutout. The upper light can be dropped on the inner bottom surface of the reservoir 10 through the cutout.

The upper light can be prepared by selecting sintered ores having a particle size of 8 mm to 15 mm among the sintered light that has been manufactured. The upper light is prevented from being lost to the side of the grate bar of the pallet forming the bottom surface (not shown) of the reservoir 10 or adhering to the grill bar .

The first loading station 300 and the second loading station 400 may be arranged to be spaced from the upper optical hopper 20 in the running direction of the reservoir 10 above the traveling path. The first loading station 300 is provided to load the mixing material into the reservoir 10 and the second loading station 400 is provided to load the solid fuel into the reservoir 10 .

The first loading unit 300 and the second loading unit 400 described above constitute the raw material charging apparatus according to the embodiment of the present invention, and these components will be described in detail below.

Hereinafter, a raw material charging apparatus according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 4. FIG. The raw material charging apparatus according to an embodiment of the present invention includes a first loading 300 where the blending material is stored and a second loading 400 where the fuel is stored.

The first hopper 300 may include a first hopper 310, a first hopper gate 320, a drum feeder 330, and a first charging chute 340. At this time, the first charging chute 340 may be provided with an opening. The opening of the first loading chute 340 penetrates at least a part of the first loading chute 340 from the upper side of the second loading machine 400 in the height direction which is the direction intersecting the extending direction of the first loading chute 340 .

According to the above-described structure, in the embodiment of the present invention, a portion of the raw material mixture can be dispensed to the second loading station 400 by the first loading station 300. For example, the first loading unit 300 may allow a portion of the blended material falling into the first loading chute 340 to pass through the opening of the first loading chute 340 and be discharged toward the second loading station 400 have.

The first hopper 310 may be disposed on a path, for example, above the reservoir 10 running along the traveling path. The first hopper 310 may be formed so as to be able to store the raw material mixture therein. The first hopper 310 is provided with a cutout opening at a lower portion thereof, and the first hopper gate 320 and the drum feeder 330 may be mounted at the cutout opening.

The first hopper gate 320 may be mounted on the first hopper 310 at an exit of the first hopper 310 and the drum feeder 330 may be rotatably mounted at the exit of the first hopper 310 . The compounding material is supplied to the drum feeder 330 through the first hopper gate 320 attached to the exit of the first hopper 310 and then controlled by the rotation speed of the drum feeder 330 And can be dropped and supplied to the first charging chute 340.

The first loading chute 340 extends obliquely downward from the first hopper 310 to form a first transport path for guiding the material mixture. At this time, the first charging chute 340 may be inclined so as to form the first conveyance path in a shape of, for example, a straight line or a curved line, such as a spline or a cycloid, taking into consideration the drop trajectory of the material mixture, .

The first charge chute 340 guides the falling of the raw material mixture through the first conveyance path and is stacked in the reservoir 10 so that the raw material mixture is sloped down in order and stacked in order according to the particle size of the raw material mixture. It can be loaded in a segregated manner.

That is, due to the inclined structure of the first charging chute 340, the mixing material having a relatively small particle size can be loaded inside the reservoir 10, and a relatively large particle size Can be loaded.

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

The first charging chute 340 may include a plurality of rollers R arranged at least in the lower portion in an upward sloping direction in the direction in which the reservoir 10 runs. A plurality of rollers R are arranged at an upper portion of the first charging chute 340 so as to be inclined upward in the direction in which the reservoir 10 travels or at least one swash plate (not shown) As shown in Fig.

At this time, the first charging chute 340 may be divided into upper and lower portions based on a predetermined position in the height direction. Alternatively, the first charging chute 340 may be divided into upper and lower portions based on a predetermined position in a direction in which the reservoir 10 travels. The upstream side of the traveling path on the opposite side of the ignition path 60 may be the lower portion of the first charging chute 340 and the lower side of the traveling path on the ignition path 60 side And the downstream side may be the top of the first charging chute 340. Alternatively, the first charging chute 340 may be divided into upper and lower portions based on the inclination angle change rate. For example, the upper and lower portions may be distinguished based on a predetermined position of the first charging chute 340 where the rate of change of the tilt angle is switched from increase to decrease or from decrease to increase.

A plurality of rollers R may be arranged to be inclined such that at least an upper portion of the first charging chute 340 has an angle of from 55 to 90 degrees, for example, an inclination angle with respect to the reservoir 10, The angle of inclination of the lower portion 340 may decrease.

That is, the first charging chute 340 is formed at an angle of 55 to 90 degrees from the top, so that the initial falling rate of the raw material mixture can be secured to a desired value, and the inclination angle is reduced at the bottom, The horizontal component can be secured at a desired value.

When the first charging chute 340 is provided as described above, the opening of the first charging chute 340 may be formed such that a part or all of the plurality of rollers R are spaced apart from each other in the direction in which the reservoir 10 travels And may include a plurality of roll gaps g formed therein.

The plurality of rollers R arranged at least at the lower portion of the first charging chute 340 may be spaced apart from each other by an interval of 3 mm to 50 mm. The plurality of rollers R arranged on the top of the first charging chute 340 may be spaced apart from each other by an interval of 3 mm to 50 mm or may be spaced apart from each other by an interval of 3 mm or less.

As described above, the plurality of rollers R are separated from each other at intervals of 3 mm to 50 mm at the lower part of the first charging chute 340, so that the mixing material can be dispensed to the second charging station 400 by a desired amount , So that a mixture of the blending raw material and the solid fuel can be charged into the raw material layer at a desired charging height. That is, a mixture of the blending raw material and the replacement fuel can be uniformly charged into the upper layer and the surface layer of the raw material layer.

For example, when the roll gap g is formed to have a size of less than 3 mm, the blended raw material falling into the first loading chute 340 does not pass through the roll gap g, or the blended raw material has a roll gap g The passing amount does not have a meaningful value. That is, when the roll gap g is formed to have a size of less than 3 mm, since the dispensed amount of the blend material passing through the roll gap g and discharged to the second blasting machine 400 is smaller than the desired value, And the blending raw materials can not be uniformly mixed in the surface layer, and the solid fuel can be charged into the surface layer of the raw material layer in a concentrated manner.

When the roll gap g is formed to have a size exceeding 50 mm, the dispensing amount of the blending raw material passing through the roll gap g and discharged to the second blasting machine 400 is larger than the desired value, May be moved from the upper layer to the lower layer side of the raw material layer, and the air permeability of the raw material layer may be lowered.

Meanwhile, the first charging chute (not shown) according to another embodiment of the present invention may include an inclined plate integrally extending upward in an inclining direction of the reservoir 10, And may include a plurality of split type swash plates extending obliquely.

For example, a first loading chute (not shown) according to another embodiment of the present invention may include at least one swash plate (not shown) extending upwardly sloping in the direction in which the reservoir 10 travels, have. At this time, at least one swash plate (not shown) is extended upwardly in the running direction of the reservoir 10 or a plurality of rollers are installed in the upper part of the first charging chute according to another embodiment of the present invention, And may be arranged to be inclined upward in the traveling direction.

When the first charging chute according to another embodiment of the present invention is constructed as described above, the opening of the first charging chute according to another embodiment of the present invention may include a plurality of (Not shown) formed through the above-mentioned swash plate of the first loading chute at a position of the first loading chute.

Meanwhile, the first loading suit according to another embodiment of the present invention may be formed to have all the technical features of the first loading suit 340 according to the embodiment of the present invention. For example, at least the upper portion of the first charging chute according to another embodiment of the present invention may be extended at an inclination angle of 55 ° to 90 ° with respect to the reservoir 10, and the inclination angle may be decreased toward the lower portion. Further, the opening formed at least at the bottom of the first charging chute according to another embodiment of the present invention may be formed with a width of 3 mm to 50 mm.

Hereinafter, the second portion of the raw material charging apparatus according to the embodiment of the present invention will be described in detail. The second hopper 400 according to the embodiment of the present invention includes a second hopper 410 in which a solid fuel is contained and a second vessel 42 in which a mixture of the solid fuel and the mixing material is mixed with the reservoir 10, Chute 420 as shown in FIG. Particularly, in the second charging chute 420, the mixing section A is formed at least in part and the mixing raw material dispensed from the opening of the first charging chute 340 is passed through the mixing section A, It can be uniformly mixed with the fuel.

At this time, the blended raw material which is discharged to the second charging chute 420 and mixed with the solid fuel may include the blending raw material of the finely divided state in the relatively small particle size among the entire blended raw materials supplied to the first charging chute 340.

According to the above-described structure, in the embodiment of the present invention, it is possible to introduce the mixed raw material and the solid fuel into the interior of the reservoir 10 while uniformly mixing the mixed raw material and the solid fuel, It can be charged into the upper layer and the surface layer of the raw material layer. That is, before the mixing raw materials and the solid fuel are charged into the reservoir 10, they can be uniformly mixed.

The second hopper 410 may be spaced apart from the first hopper 310 on the upper side of the reservoir 10. The second hopper 410 may be configured to store solid fuel therein. The second hopper 410 may have an outlet portion at a lower portion thereof, and a second hopper gate and a fuel feeder (not shown) may be installed at an outlet portion thereof.

The second hopper gate can be mounted on the outlet of the second hopper 410 to be elevatable or rotatable and the fuel feeder can be provided to be rotatable or oscillatable at the outlet of the second hopper 410. The solid fuel is supplied to the fuel feeder through the second hopper gate mounted at the outlet of the second hopper 410 and thereafter the amount of discharge is controlled by the number of revolutions or the frequency of the fuel feeder, 420, respectively.

3 (a), a plurality of second hoppers 410 may be arranged in the width direction of the traveling path. 3 (b), a second hopper gate may be provided at the outlet of the second hopper 410 to have a plurality of divided gate structures so as to extend in the width direction of the traveling path Lt; / RTI >

According to the above-described structure, in the modification of the present invention, it is possible to supply the second charging chute 420 while adjusting the discharge amount of the solid fuel by a plurality of positions or sections in the width direction of the traveling route. For example, the solid fuel may be separately classified according to the combustion speed, and the solid fuel having a relatively high combustion speed may be selected and supplied to the second charging chute 420 from the center of the traveling path in the width direction. Alternatively, the supply amount of the solid fuel may be adjusted to a plurality of positions in the width direction of the traveling path so that the supply amount of the solid fuel toward the both side edges in the width direction of the traveling path is increased and supplied to the second charging chute 420. Since the supply of the solid fuel can be controlled by biasing in the width direction in this manner, the width direction control of the flame propagation of the fuel layer can be performed more smoothly in the modified example of the present invention.

Hereinafter, the second loading suit of the second loading according to the embodiment of the present invention will be described. The second charge chute 420 may form a second transport path extending obliquely below the second hopper 410 and the first charge chute 340 to guide the solid fuel. At this time, the second charging chute 420 may be inclined so as to form the second conveying path in a shape of, for example, a straight line or a curved line such as a spline or a cycloid, taking into consideration the falling trajectory of the solid fuel, .

The second charging chute 420 guides the falling of the mixture of the starting material and the solid fuel by using the second conveying path and is loaded inside the reservoir 10 so that the mixture is discharged in an orderly manner Stacked and vertically segregated.

That is, due to the inclined structure of the second charging chute 420, the mixing raw material and the solid fuel having a relatively large particle size can be uniformly mixed and loaded in the upper layer of the raw material layer, and the surface layer of the raw material layer has a relatively small particle size The blending raw materials and the solid fuel can be mixed and loaded uniformly. At this time, the mixing raw material and the solid fuel can be uniformly mixed at a desired height inside the reservoir 10 by appropriately selecting the inclination angle, the extension length, and the like of the second charging chute 420.

The second charging chute 420 may be spaced apart from the first charging chute 340 in the direction in which the reservoir 10 travels so that at least the lower portion of the second charging chute 420 may face the lower portion of the first charging chute 340, The mixing section A of the two charging chutes 420 may be formed in the lower portion 420A of the second charging chute 420. [ As the second charging chute 420 is spaced from the first charging chute 340 in the direction in which the reservoir 10 travels, the charging of the charging raw material in the first charging chute 340 can be prevented It is possible to smoothly charge the mixture of the starting material and the solid fuel into the upper layer and the surface layer of the raw material layer without interfering with each other. On the other hand, the lower portion 420A of the second charging chute 420 can be positioned on the upstream side of the traveling path with respect to the surface treatment portion 50, and at the position preceding the surface treatment portion 50, And the mixture of the starting material and the solid fuel can be smoothly charged into the surface layer.

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

The second charging chute 420 may include at least one swash plate extending upwardly in a direction in which the reservoir 10 travels. At this time, the second charging chute 420 may include an inclined plate having an integral shape or a structure including a plurality of divided inclined plates.

For example, in the embodiment of the present invention, the second charging chute 420 including the upper swash plate 421 in the upper portion 420B and the lower swash plate 422 in the lower portion 420A is illustrated. In this case, the lower swash plate 422 can be inclined between the lower end of the first charging chute 340 and the surface treatment portion 50 so as to face the lower portion of the first charging chute 340, The opening of the first charging chute 340 may be located above the second charging chute 422.

On the other hand, the method of distinguishing the upper and lower parts of the second charging chute 420 may correspond to a method of distinguishing upper and lower parts of the first charging chute 340. The upstream side of the traveling path is divided into the lower portion 420A of the second loading chute 420 and the downstream side of the traveling path is defined as the upper portion 420B of the second loading chute 420, .

At least the upper portion of the second charging chute 420 may be extended to have an angle of, for example, an inclination angle of 55 to 90 degrees with respect to the reservoir 10, and the second charging chute 420 may have an inclination angle Can be reduced.

That is, the second charging chute 420 can form the upper swash plate 421 disposed at the upper portion 420B at an inclination angle of 55 ° to 90 °, for example, to secure a desired initial falling rate of the solid fuel.

The inclination angle of the lower swash plate 422 disposed in the lower portion 420A is made smaller than the inclination angle of the upper swash plate 421 so that the horizontal component of the removal rate of the mixture of the blending material and the solid fuel is desired Value.

Hereinafter, the remaining components of the treatment facility according to the embodiment of the present invention will be described.

The surface layer processing unit 50 may be disposed so as to pass the upper portion of the reservoir 10 in the width direction of the travel path in a direction in which the reservoir 10 travels from below the second charging chute 420. [ The surface layer processing unit 50 has a role of selecting the surface of the surface layer of the raw material layer so that the surface of the raw material layer contacts the surface layer of the raw material layer while the reservoir 10 travels and the surface height of the surface layer is constant in the width direction and the running direction do. For example, the surface layer processing section 50 may include a rod-like or plate-shaped contact member extending in the width direction of the travel path, and driving means (not shown) for supporting the contact member so as to move, elevate or rotate.

The ignition furnace 60 may be located above the traveling path in the direction in which the reservoir 10 travels in the second loading station 400. [ The ignition furnace 60 may be formed to inject the flame downward and serves to supply a flame to the raw material layer stacked in the reservoir 10 to ignite while the storage device 10 is running.

A crusher (not shown) and a cooler (not shown) may be disposed in the vicinity of the other end of the traveling path where the traveling path ends. The crusher may be formed so as to be crushed to a predetermined particle size by being supplied with the sintered light to be distributed in the reservoir 10. The cooler may be formed so as to cool the sintered ores that have been completely broken by the crusher.

The wind box 70 is provided in a lower part of the traveling path, and a plurality of the wind boxes 70 may be arranged continuously in the traveling direction, and may be respectively connected to the inside of the storage device 10 running on the traveling path. The wind box 70 forms a negative pressure to draw in the interior of the reservoir 10. The flame surface propagates in the direction from the surface layer to the lower layer of the raw material layer stacked inside the reservoir 10 by the wind box 70 so that the raw material layer can be sintered into the sintered ores.

The exhaust part 80 may include an exhaust chamber, a dust collector, a blower, and an exhaust port as constituent parts. The exhaust part 80 serves to exhaust the exhaust gas drawn in the wind box 70 to the outside air by providing strong suction force, for example, sound pressure. The exhaust chamber has a passage through which the exhaust gas passes, and can be connected to the plurality of windboxes 70. The dust collector may be formed to remove dust contained in the exhaust gas and may be connected to the end of the exhaust chamber, and the blower may be connected to the dust collector on the opposite side of the exhaust chamber to induce the flow of exhaust gas from the exhaust chamber to the dust collector. Exhaust air is connected to the blower to discharge the exhaust gas to the outside air.

Hereinafter, a raw material charging method according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 4. FIG. Hereinafter, the description of the method of charging the raw material according to the embodiments of the present invention and the modifications will be omitted or briefly described.

A method for charging a raw material according to an embodiment of the present invention is a method for charging a raw material into a reservoir running along a path, comprising the steps of: dropping a raw material mixture into a first conveyance path and guiding the raw material to the inside of the reservoir; And a step of mixing the mixture material and the solid fuel in a part of the second conveyance path.

First, raw materials and fuels are prepared. At this time, raw materials and fuels can be prepared from various raw materials and fuels in accordance with various processes to which the present invention can be applied. In the embodiment of the present invention, raw materials and fuel are prepared by the following process.

First, a raw material, such as a blend material 91, is provided. For example, fine iron ores, limestone, differential coke, and anthracite are mixed and conditioned to prepare a blending raw material having a predetermined particle size. At this time, the blending raw materials include blending raw materials for producing sintered ores. Further, a fuel, such as a solid fuel 92, is provided. For example, at least one of the differential coke and the anthracite is provided as a solid fuel.

At this time, in the embodiment of the present invention, the amount of the solid fuel to be mixed with the blending raw material may be partially reduced and the amount corresponding to the reduced amount may be provided as the solid fuel used in the second blast furnace 400 have. That is, a part of the solid fuel is prepared in advance by mixing with the compounding material, and the remainder of the solid fuel is separately prepared. Thereafter, the upper layer B2 of the raw material layer B and the surface layer B3 ). At this time, the amount of the solid fuel separately prepared without being mixed with the blending material may be determined in consideration of the combustion heat and combustion rate to be supplied to the upper layer and the surface layer of the raw material layer.

The mixing raw material 91 is then charged into the first hopper 310 of the first loading station 300 and the solid fuel 92 is loaded into the second hopper 410 of the second loading station 400 .

Thereafter, the raw material mixture 91 is sloped down to the first conveyance path by using the first charging chute 340 of the first furnace furnace 300, which is extended upward in the running direction of the reservoir 10, To the interior of the reservoir (10). On the other hand, the upper light is charged at a predetermined height on the inner bottom surface of the reservoir 10, and the compound material 91 is charged to the upper side of the upper light.

Introduces the mixing raw material into the interior of the reservoir (10) and directs the solid fuel into the interior of the reservoir (10). In detail, the second charging chute 420 of the second loading station 400, which is located at the lower side of the first conveying path and extends upward in the running direction of the reservoir 10, Is guided to the inside of the traveling storage device 10 by sloping downward in the second conveyance path.

The compounding material 91 is charged into the reservoir 10 before the solid fuel 92 on the upstream side of the traveling path and forms the lower layer B1 of the raw material layer B, Is charged into the reservoir 10 later than the blend material 91 on the downstream side of the path to form the upper layer B2 and the surface layer B3 of the raw material layer B.

As described above, in the embodiment of the present invention, by using the second conveyance path spaced below the first conveyance path so as to be distinguished from the first conveyance path used as the charging path for the mixing material, . Therefore, the compounding material can be charged smoothly without interference with the solid fuel.

Meanwhile, the process of introducing the solid fuel 92 into the reservoir 10 regulates the supply amount of the solid fuel supplied to the second conveyance path by a plurality of positions in the width direction of the second conveyance path, And dropping it obliquely to the second conveyance path.

By this process, the amount of the solid fuel to be charged can be adjusted by a plurality of positions in the width direction of the traveling path. For example, in the embodiment of the present invention, do.

For example, when the raw material layer (B) is divided into five equal parts in the longitudinal direction, the strength and the fraction of the sintered light are uniformly exhibited in each equal area of both side edges in the width direction. Therefore, in the embodiment of the present invention, So that more of the solid fuel can be charged into each of the equal portions of both side edges in the width direction.

On the other hand, since the surface of anthracite coal is hydrophobic compared to the fine coke, it has a low water-holding ability, and compared with anthracite coal whose particle size is controlled by simple crushing, the differential coke has a high processing rate because it undergoes a process of being carbonized at a high temperature. Also, in the case of fine powder coke, the number of fixed carbon is larger than that of anthracite. Due to such physical and chemical properties, the burning rate of the differential coke is faster than that of anthracite. When the raw material layer is charged as a solid fuel without distinguishing the anthracite and the fine powder coke having different characteristics from each other, it is difficult to take advantage of each inherent characteristic due to the difference in the combustion speed.

Therefore, in the embodiment of the present invention, in the process of introducing the solid fuel 92 into the reservoir 10, the solid fuel is classified by the characteristic, for example, the burning rate, so that the solid fuel such as the differential coke To the center portion of the second conveyance path which is relatively inferior in air permeability, and falls obliquely to the second conveyance path.

In the process of introducing the solid fuel 92 into the reservoir 10, the solid fuel, which is relatively slow in burning rate, is classified by the characteristics, for example, the burning rate, so that the solid fuel, such as anthracite, To the both edge portions of the path, and falls obliquely onto the second conveyance path.

By this process, it is possible to eliminate the combustion unbalance of the raw material layer B in the width direction of the traveling path.

For example, conventionally, when the firing temperature at the center of the raw material layer (B) is in the range of 1128 캜 to 1289 캜, the firing temperature is formed in the widthwise edge portion of the raw material layer (B) in the range of 594 캜 to 1174 캜. In the embodiment of the present invention, the temperature deviation between the center portion and the widthwise edge portion of the raw material layer (B) can be considerably reduced, and the firing temperature of the widthwise edge portion of the raw material layer (B) It is possible to improve the sintering temperature to be close to the sintering temperature.

Conventionally, since the widthwise edge portion of the raw material layer B is rapidly cooled and the calcining heat amount is insufficient, the recovery rate from the edge portion in the width direction of the raw material layer B to the sintered light is about 64.1%, for example. , The sintered light intensity was 45.5%, and the fraction less than -10㎜ was about 80.5%. In the embodiment of the present invention, it is possible to improve the recovery rate of the sintered light at the widthwise edge of the raw material layer (B), the sintering strength and the fraction of -10 mm or less so as to be close to the sintering intensity of the sintered ores at the center of the raw material layer (B).

Introducing the solid fuel into the interior of the reservoir 10, and mixing the mixing raw material and the solid fuel in a portion of the second conveyance path. Particularly, a part of the compound material falling obliquely to the first conveyance path passes through the opening formed through the first conveyance path and drops to the second conveyance path side. Thereafter, the blended raw material flowing out to the second conveying path side is passed through a part of the second conveying path, for example, the mixing section (A) side and mixed with the blending raw material. Then, a mixture of the blending raw material and the solid fuel is charged into the upper layer B2 and the surface layer B3 of the raw material layer B.

As described above, in the embodiment of the present invention, a portion of the blend material falling through the first conveyance path is mixed with the solid fuel via the second conveyance path side and then mixed with the upper layer B2 and the surface layer B3 of the raw material layer B Charge.

Therefore, the solid fuel can be charged at the desired filling height in the upper layer B2 and the surface layer B3 of the raw material layer B, and can be uniformly mixed with the raw material mixture. Particularly, since it is possible to prevent the solid fuel from being charged in the upper layer B2 and the surface layer B3 of the raw material layer B in a concentrated manner or being locally concentrated at a predetermined position and height, It is possible to prevent the raw material layer B from being irregularly burned at the time of this combustion control.

Since a portion of the blended raw material 91 is mixed with the solid fuel 92 and can be uniformly charged into the upper layer B2 and the surface layer B3 of the raw material layer B, B2 and the surface layer B3 can be improved. That is to say, the heat of combustion in the upper layer B2 and the surface layer B3 of the raw material layer B can be used for sintering the raw material mixture 91 loaded into the upper layer B2 and the surface layer B3 of the raw material layer B .

At this time, the compounding raw material to be mixed with the solid fuel may be a compounding raw material in a fine state or a compounding raw material having a particle size of 3 mm to 50 mm. The particle size of the blended raw material mixed with the solid fuel can be controlled by adjusting the roll gap (g) of the second charging chute 340 by adjusting the size and position.

On the other hand, in the process of mixing the blending raw material 91 and the solid fuel 92 in a part of the second conveyance path, the amount of the blending material discharged to the second conveyance path side is controlled and the inclination And a step of dispensing a portion of the compounding material to the second conveying path side.

Thus, the height of the charge of the mixture of the blending raw material and the solid fuel can be adjusted to a desired height by adjusting the dispensing amount of the blending material introduced to the second conveying path side. For example, by increasing the dispensing amount of the blending material introduced to the second conveying path side, it is possible to form a mixture layer of the blending raw material and the solid fuel at a lower loading height with reference to the bottom surface of the reservoir 10. On the other hand, by reducing the dispensing amount of the blending material introduced to the second conveying path side, it is possible to form a mixture layer of the blending raw material and the solid fuel at a higher filling height based on the bottom surface of the reservoir 10 .

The reservoir 10 traveling along the traveling path passes through the lower part of the first loading unit 300 and the lower loading unit 400 and the raw material layer B is loaded therein. As shown in FIG. At this time, the surface layer processing section 50 is brought into contact with the surface of the surface layer B3, and the surface of the surface layer B3 is planarized so as to be uniform in the width direction.

Thereafter, the reservoir 10 travels along the traveling path and passes under the ignition furnace 60. At this time, the raw material layer B is ignited and sintering is started. Thereafter, air is forcedly sucked to the lower side of the reservoir 10 to propagate the flame from the upper part of the raw material layer B to the lower part thereof.

The raw material layer B is manufactured as sintered light through sintering and cooling processes while the storage device 10 travels along the traveling path, and then the luminous material is lighted in the course of the storage device 10 entering the return path, It can be transported to a re-manufacturing process.

As described above, the apparatus and method for charging a raw material according to the embodiment of the present invention are characterized in that a second conveyance path is provided below the first conveyance path, and the solid fuel and the solid fuel are supplied to the upper layer and the surface layer of the raw material layer by using the second conveyance path, It is possible to uniformly mix and supply the compounding raw materials.

In addition, the apparatus and method for charging a raw material according to the embodiment of the present invention can differentiate the kind and charge amount of the solid fuel in the width direction of the traveling path, classify the particle size of the solid fuel, have.

Thus, in the embodiment of the present invention, it is possible to reduce the ratio of the solid fuel in the blended raw material, increase the recovery rate of the sintered ores in the upper layer of the raw material layer, and improve the quality difference of the sintered ores in the width direction The technical characteristics that can be reduced. In addition, in the embodiment of the present invention, technical features that can solve the heat quantity imbalance and the heat quantity shortage in the upper layer and the surface layer of the raw material layer are presented. As a result, the quality variation of the sintered ores produced can be minimized.

5 is a graph showing a detailed structure of a first charging suit according to an embodiment of the present invention. In this case, 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 roll gap information of the rollers constituting the first loading chute.

2 and 4 to 5, an apparatus and a method for charging a raw material according to an embodiment of the present invention are applied to the process of manufacturing an sintered ore to produce an sintered ore, and then, based on the results, And the detailed structure of the derived raw material charging apparatus will be described with reference to the roller position and the roll gap size.

Here, the contents of the roller position and the roll gap size, which will be described below, are intended to assist the understanding of the present invention and are not intended to be limiting.

First, a raw material charging apparatus and a treatment facility according to an embodiment of the present invention are provided. At this time, the first charging chute 340 is provided with a structure in which a plurality of rollers R are continuously arranged on upper and lower portions. Thereafter, the roll gap g between the plurality of rollers R is made different, and the sintered light production process is repeated. At this time, the raw material layer is charged into a super-high layer of about 800 mm or more, wherein 10% to 30% of the raw material layer is formed as an upper layer, and 5% to 10% is formed as a surface layer. The upper light is adjusted to 5 to 10% of the height of the raw material layer, and the process conditions are adjusted so that the effective firing portion is 60% to 80%. As the solid fuel, various dusts including a differential coke or a heat source are provided.

The production of the sintered ores was repeatedly performed under predetermined process conditions to derive the results. The detailed structure of the raw material charging apparatus at this time is shown in Fig. Here, the detailed structure of the raw material charging apparatus shown in the graph is a detailed structure of the raw material charging apparatus when the recovery rate and the strength in the upper layer and the surface layer of the sintered ores produced are relatively improved. The numerical values shown in FIG. 5 are values included in the detailed structure of the first loading suit described in the raw material charging apparatus and method according to the embodiment and the modification of the present invention, As described above, each of the numerical values shown in Fig. 5 will be briefly described below.

Among the plurality of rollers R forming the structure of the first charging chute 340, the roller positioned at the lowest height is referred to as a first roller R 1, and the second roller R 3 adjacent to the first roller R 1, The roller positioned at the height is referred to as a second roller R2. In this way, the numbers of the rollers R are determined in order. The roller at the highest position becomes the n-th roller Rn.

The graph of FIG. 5 graphically shows the roll gap (g) between the rollers R, with respect to the rollers from the first low-height roller to the fifteenth lowest-height roller.

5, the roll gap g between the rollers R varies depending on the lower inclination angle of the first loading chute 340. The inclination angle formed by the arrangement of the plurality of rollers R is, for example, It can be seen that the recovery rate and the strength in the upper layer and the surface layer of the produced sintered body can be relatively improved as the roll gap g becomes smaller as the size increases to 40 °.

Further, looking at the graph of Figure 5, the first roller (R1) and the roll gap between the second roller (R2) from the roll gap (g _1,2) between the third roller (R3) and the fourth roller (R4) _(3,4 g) one the size of the roll gap decreases continuously from the third roller (R3) and the fourth roller of the fourth roller (R4) and the fifth in the roll gap (g _3,4) between (R4) It can be seen that the size of the roll gap decreases discontinuously up to the roll gap g _{4 and} 5 between the rollers R ₅ . At this time, the rear end D of the section C in which the roll gap is discontinuous becomes a reference for distinguishing the upper and lower portions of the first loading chute 340, and the rear end D of the section C, 50 are installed. Thus, from the roll gap g _1,2 between the first roller R1 and the second roller R2 to the roll gap g _3,4 between the third roller R3 and the fourth roller R4 The mixed raw material falling through the roll gaps of the first loading chute 340 is discharged to the mixing section A of the second loading chute 420 and the mixed raw material discharged to the mixing section A between the fourth roller R4 and the fifth roller R5 It can be seen that the production of the sintered ores is proceeded smoothly when the dispensation of the raw material mixture is suppressed from the roll gaps g ₄ and ₅ of the sintered ores in the upper layer and the surface layer, have.

In order to more clearly understand the technical features of the present invention, a raw material charging apparatus according to a comparative example of the present invention will be described below, and a method and a result of the operation will be described with reference to a raw material charging apparatus and method according to an embodiment of the present invention Explain in contrast.

6 is a process diagram showing a manner in which a raw material charging apparatus according to a comparative example of the present invention operates.

In the comparative example of the present invention, the mixing raw material loading unit 1 and the solid fuel loading unit 3 are provided on the upper side of the sintering bogie 5 and the solid fuel nozzles 4 are provided on the upper surface of the mixing material chute 2, And a raw material charging device is provided.

When the charging route of the blend material and the charging route of the replacement fuel are overlapped in a single path as described above, the blend material 6 and the solid fuel 7 can not be mixed with each other, And is charged into the sintering bogie (5).

In this case, since the solid fuel 7 loaded on the upper surface of the compounding material 6 does not sufficiently contribute to the sintering of the upper layer of the compounding material 6 and is consumed by burning, This is difficult. Also, the air permeability is lowered by the layer of the solid fuel 7 formed on the upper surface of the blend material 6. Particularly, since the particulate solid fuel having a diameter of 1 mm or less has a relatively high burning rate, it burns rapidly and forms a thin combustion zone, which has no effect as a heat source. As a result, in the above-described comparative example of the present invention, the sintered ores having a sufficient strength can not be produced in the surface layer portion and the upper layer portion of the blended material, and the recovery rate of the sintered ores is relatively low.

On the other hand, in the embodiment of the present invention, the first conveyance path and the second conveyance path are provided vertically. Therefore, it is possible to drop a portion of the blended raw material falling on the first conveyance path to the side of the second conveyance path, to easily mix the blended raw material with the solid fuel, and to mix the blended raw material and the solid fuel with the upper layer and the surface layer It can be charged smoothly. As a result, in the embodiment of the present invention, the blending raw material is sufficiently sintered in the upper layer and the surface layer of the raw material layer, and the recovery rate of the sintered ores is considerably high.

It should be noted that the above-described embodiments of the present invention are for the purpose of illustrating the present invention and not for the purpose of limitation of the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It will be possible.

10: reservoir 20: upper optical hopper
300: Chapter 1 Wear 400: Chapter 2 Wear
50: surface layer processing section 60:
70: Wind box 80:
91: raw material 92: fuel

Claims (19)

A first hopper disposed above the reservoir traveling along the path;
A first charging chute extending obliquely from a lower side of the first hopper and having an opening penetrating in a direction intersecting the extending direction;
A second hopper disposed above the reservoir and spaced apart from the first hopper; And
And a second charging chute extending obliquely below the second hopper and the first charging chute. The method according to claim 1,
Wherein the first charging chute comprises at least one swash plate extending upwardly at an upper portion in a direction in which the reservoir runs,
Wherein the opening includes a plurality of slits formed through the swash plate at a plurality of positions spaced apart in a direction in which the reservoir runs. The method according to claim 1,
Wherein the first loading chute comprises a plurality of rollers arranged at least in a lower portion and arranged to be inclined upward in the direction in which the reservoir runs,
Wherein the opening includes a plurality of roll gaps formed such that part or all of the plurality of rollers are spaced apart from each other in a direction in which the reservoir runs. The method according to claim 2 or 3,
Wherein at least an upper portion of the first charging chute is extended or arranged at an angle of 55 to 90 relative to the reservoir,
Wherein the inclination angle decreases as the first loading chute moves downward. The method of claim 3,
Wherein the plurality of rollers arranged at least at the lower portion of the first charging chute are spaced apart from each other by an interval of 3 mm to 50 mm. The method according to claim 1,
Wherein the plurality of second hoppers are arranged in the width direction of the path. The method according to claim 1,
Wherein the outlet of the second hopper is provided with a plurality of divided gates arranged in a width direction of the path. The method according to claim 1,
Wherein the second charging chute comprises at least one swash plate,
Wherein the swash plate extends upward in an inclined direction in a direction in which the reservoir runs. The method of claim 8,
Wherein at least an upper portion of the second charging chute extends at an angle of 55 to 90 degrees with respect to the reservoir,
Wherein the inclination angle of the second charging chute decreases as the charging station is lowered. The method of claim 8,
Wherein the second charging chute is spaced apart from the first charging chute in a direction in which the reservoir runs and the lower portion faces a lower portion of the first charging chute. The method of claim 1, 8, or 10,
Wherein the second charging chute has a mixing section formed at least in part thereof,
And a raw material dispensed from the opening of the first charging chute passes through the mixing section. CLAIMS 1. A method for loading a stock into a reservoir traveling along a path,
Dropping the raw material into a first conveyance path and guiding the raw material to the inside of the reservoir;
Dropping the fuel into the second conveyance path and guiding the fuel to the inside of the reservoir;
And mixing the raw material and fuel in a section of the second conveyance path. The method of claim 12,
The process of introducing the raw material into the reservoir includes:
And dropping the raw material in an inclined manner to the inside of the reservoir by the first conveyance path extending upward in an inclining direction of the reservoir. 14. The method of claim 13,
The step of introducing the fuel into the reservoir includes:
And guiding the fuel to the inside of the reservoir by sloping down the fuel by a second long conveying path extending upward from the bottom of the first conveying path in a running direction of the reservoir. The method of claim 12,
The step of introducing the fuel into the reservoir includes:
And adjusting the amount of fuel supplied to the second conveyance path by a plurality of positions in the width direction of the second conveyance path and causing the fuel to fall obliquely to the second conveyance path. The method of claim 12,
The step of introducing the fuel into the reservoir includes:
Dividing the fuel by the burning rate and supplying the fuel having a relatively high combustion speed to the central portion of the second conveyance path and dropping the fuel at an inclined angle to the second conveyance path. The method of claim 12,
The process of mixing the raw material and the fuel in a section of the second conveyance path includes:
A step of discharging a part of the raw material falling obliquely to the first conveyance path toward the second conveyance path side;
And mixing the raw material dispensed to the second transport path side with fuel through a portion of the second transport path. 18. The method of claim 17,
The process of mixing the raw material and the fuel in a section of the second conveyance path includes:
And dropping a part of the material falling obliquely to the first conveyance path into an opening formed through the first conveyance path. 18. The method of claim 17,
The process of mixing the raw material and the fuel in a section of the second conveyance path includes:
And controlling the dispensing amount of the raw material dispensed to the second transfer path side and dispensing a part of the raw material falling obliquely to the first transfer path to the second transfer path side.

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