JP2016194380A - Raw material charging apparatus of sintering machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a sintered raw material charged from an intensified sifting feeder (ISF) from sticking on a ventilation bar and also to prevent abnormal segregation from being caused in a raw material layer on a palette.SOLUTION: A raw material charging device of a sintering machine which charges a sintered raw material 20 onto a palette 6 of the sintering machine comprises: an ISF 3 which has a plurality of bar-like materials 5 arranged obliquely above the palette 6; a movable bar 7 which is extended in parallel to a travel direction of the palette 6 to form a vent hole 10 in the sintered raw material 21 charged onto the palette 6; a moving device 8 which moves the bar 7 in the travel direction of the palette 6; and a fixed type scraper 9 which is arranged at a position isolated from a fall track 15 of the sintered raw material 22 from the ISF 3 to the palette 6 above the bar 7, and comes into contact with the sintered raw material 23 sticking on the bar 7 when the moving device 7 moves the bar 7 back in the opposite direction from the travel direction of the palette 6.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a raw material charging apparatus for a sintering machine provided with a plurality of bars for forming a ventilation hole extending in the traveling direction of the pallet in a sintering raw material charged on the pallet of the sintering machine.

  2. Description of the Related Art As a raw material charging device for a sintering machine that charges a sintering raw material on a pallet of a sintering machine, an sized and distributed charging device (ISF) is known (for example, Patent Document 1). -3)). This ISF is provided with a plurality of bar members that are inclined above the pallet along the traveling direction of the pallet (that is, the conveying direction of the sintering raw material). Are arranged so as to widen the gap. Using this ISF, a raw material layer is deposited on a pallet by depositing a raw material layer so that a coarse raw material is dropped from the ISF to the far side and deposited on the lower layer side of the raw material layer. The raw material can be dropped to the vicinity of the ISF and deposited on the upper layer side of the raw material layer. In this way, by using ISF, the sintered raw material is charged on the pallet so that the raw material layer has continuous grain segregation in the height direction. It becomes possible to sinter the raw material uniformly.

  In addition, the sintering machine includes a plurality of bars (hereinafter referred to as ventilation bars) for forming ventilation holes in the sintering raw material deposited on the pallet. This ventilation bar is a bar material arranged in parallel with the direction of travel of the pallet. A plurality of bars are provided at intervals in the pallet height direction and width direction at the charging position of the sintering raw material in the pallet. Installed. By installing a plurality of such ventilation bars, a plurality of ventilation holes are formed in the raw material layer of the sintered raw material charged and deposited on the pallet. The ventilation holes can increase the air permeability in the raw material layer on the pallet, thereby improving the sintering speed and the productivity.

  However, when the ventilation bar is installed at the charging position of the sintered material, the sintered material charged on the pallet from the charging device adheres to the ventilation bar. As a technique for preventing adhesion of the sintered raw material to the ventilation bar, Patent Document 4 discloses a rotary ventilation bar that can automatically rotate using the force of the sintering raw material as the pallet advances as the ventilation bar. It is disclosed to use. According to Patent Document 4, the rotary aeration bar itself rotates to drop the sintered material deposited on the bar by gravity, thereby preventing adhesion of the charged material to the bar.

Japanese Patent Laid-Open No. 61-223136 JP-A-62-114689 JP-A-2-195193 Special table 2005-520121 gazette

  By the way, in the sintering machine provided with the ISF, the sintering raw material charged on the pallet is caused to generate continuous grain segregation in the height direction, but is charged from the ISF onto the pallet. Sintered raw materials (hereinafter referred to as charging raw materials) also deposit and adhere to the ventilation bar. Then, since the raw material adhering on the ventilation bar (hereinafter referred to as adhering raw material) and the charged raw material collide, the charging according to the particle size of the sintered raw material by the ISF is hindered. For this reason, desired grain segregation by ISF cannot be obtained, and there is a problem that abnormal segregation occurs in the raw material layer deposited on the pallet.

  In view of this, a method is conceivable in which the rotary ventilation bar described in Patent Document 4 is applied to a sintering machine equipped with ISF, and the attached raw material is dropped by its own weight by the rotation of the vent bar, thereby removing the attached raw material. However, since the sintered raw material to be charged contains moisture and easily adheres to the vent bar, the adhering raw material cannot be completely dropped by rotation of the vent bar. Remains and grows. As a result, since the adhering raw material and the charged raw material collide with each other on the ventilation bar, the problem that abnormal segregation occurs in the raw material layer deposited on the pallet cannot be solved.

  Further, as a method of removing the attached raw material on the ventilation bar, a method of mechanically scraping and removing the attached raw material on the ventilation bar using a movable scraper may be considered. However, in such a method, when scraping the adhering raw material using a movable scraper, the scraper will be positioned on the fall trajectory of the charged raw material, and the scraper and the charged raw material will collide. . For this reason, the collision with the scraper hinders charging according to the particle size of the sintered raw material by the ISF, and as a result, there is a problem that abnormal segregation occurs in the raw material layer.

  Therefore, the present invention has been made in view of the above problems, and the object of the present invention is to prevent the sintered raw material charged from the ISF from adhering to the ventilation bar, and the pallet. It is an object of the present invention to provide a new and improved raw material charging apparatus for a sintering machine capable of preventing the occurrence of abnormal segregation in the upper raw material layer.

In order to solve the above problems, according to one aspect of the present invention,
In the raw material charging device of the sintering machine, which charges the sintering raw material on the sintering machine pallet,
A sizing / dispersing charging device having a plurality of bar members arranged obliquely above the pallet;
A movable bar extending in parallel with the direction of travel of the pallet and forming a vent in the sintered raw material charged on the pallet;
A moving device for moving the bar in the direction of travel of the pallet;
On the upper side of the bar, the bar is arranged at a position separated from the fall trajectory of the sintering raw material from the sizing / dispersing charging device to the pallet, and the bar is moved by the moving device in a direction opposite to the traveling direction of the pallet. A fixed scraper that comes into contact with the sintering material adhering to the bar when retracted to
A raw material charging device for a sintering machine is provided.

The plurality of bars parallel to each other are arranged in a plurality of rows in the width direction of the pallet and in a plurality of stages in the height direction of the pallet,
The scrapers are arranged in a plurality of stages in the height direction of the pallet so as to correspond to the plurality of bars, respectively.
The plurality of stages of scrapers may be arranged so as to be shifted from each other in the direction of travel of the pallet along the trajectory of the sintered raw material falling from the sizing / dispersing charging device to the pallet.

Further, the plurality of bars parallel to each other are arranged in a plurality of rows in the width direction of the pallet,
The scraper extends above the plurality of bars in a direction intersecting the traveling direction of the pallet, and when the plurality of bars are retracted in a direction opposite to the traveling direction of the pallet by the moving device. The sintered raw material attached on the plurality of bars may be contacted.

  With the above configuration, the adhering raw material on the movable bar can be reliably removed using a fixed scraper, and the charged raw material charged into the pallet from the particle size / dispersion type charging device and the scraper collide with each other. Can also be prevented. Therefore, since the fall of the charged raw material from the sizing / dispersing charging device is not hindered by the adhering raw material or scraper on the bar, it is continuously applied in the height direction of the raw material layer by the sizing / dispersing charging device. Desired segregation of grains can be realized stably, and abnormal segregation can be prevented.

  As described above, according to the present invention, it is possible to prevent the sintered raw material charged from the ISF from adhering to the ventilation bar, and to prevent the occurrence of abnormal segregation in the raw material layer on the pallet. it can.

It is a schematic diagram which shows the raw material charging device of the sintering machine which concerns on the 1st Embodiment of this invention. It is a schematic diagram which shows the raw material charging operation | movement of the raw material charging apparatus of the sintering machine which concerns on the same embodiment. It is a perspective view which shows arrangement | positioning of the ventilation bar and scraper which concern on the same embodiment. It is a schematic diagram which shows the interference state of the adhesion raw material on the ventilation bar which concerns on a reference example, and a charging raw material. It is a schematic diagram which shows the interference state of the scraper which concerns on a reference example, and a charging raw material. It is process drawing which shows the removal method of the adhesion raw material which concerns on the same embodiment. It is process drawing which shows the removal method of the adhesion raw material which concerns on the same embodiment. It is process drawing which shows the removal method of the adhesion raw material which concerns on the same embodiment. It is process drawing which shows the removal method of the adhesion raw material which concerns on the same embodiment.

  Exemplary embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol.

[1. Composition of raw material charging equipment for sintering machine]
First, with reference to FIG.1 and FIG.2, the whole structure of the raw material charging device of the sintering machine which concerns on the 1st Embodiment of this invention is demonstrated. FIG. 1 is a schematic view showing a raw material charging apparatus of a sintering machine according to this embodiment. FIG. 2 is a schematic view showing the raw material charging operation of the raw material charging device of the sintering machine according to the present embodiment.

  The sintering machine is equipment for producing sintered ore by sintering sintering raw materials. The sintered raw material is a blended raw material made of iron ore powder, coke powder, limestone powder or the like having a particle size of about 10 mm or less. In the sintering process by the sintering machine, first, the sintering raw material is charged into the pallet by the raw material charging device of the sintering machine. After that, while the pallet is moving from the charging position to the discharge position, the coke on the surface side of the raw material layer of the sintering raw material charged in the pallet is ignited, and the entire raw material layer is coke while sucking air downward. The iron ore powder is sintered with the heat of combustion. And the sintered ore produced | generated by this sintering is crushed with the crusher of the back | latter stage of a sintering machine, and is conveyed to a blast furnace etc. through a cooling process, a particle size selection process, etc.

  As shown in FIGS. 1 and 2, the raw material charging device of the sintering machine is equipment for charging the sintering raw material 20 into the pallet 6 of the sintering machine. The raw material charging device of this sintering machine includes a hopper 1, a drum feeder 2, a sizing / dispersing charging device 3, a pallet 6, a movable bar 7 for forming a vent hole 10, A moving device 8 for the bar 7, a fixed scraper 9, and a support device 11 for the scraper 9 are provided.

  The hopper 1 and the drum feeder 2 are arranged above the charging position of the sintering raw material 20 with respect to the pallet 6. The hopper 1 stores the sintering raw material 20 charged from above. The drum feeder 2 is connected to the lower end of the hopper 1. The drum feeder 2 rotates the cylindrical drum to quantitatively cut the sintered raw material 20 from the lower end of the hopper 1 and supplies it to the chute 4. The supply device for quantitatively supplying the sintering raw material is not limited to the examples of the hopper 1 and the drum feeder 2, and other supply devices such as a belt conveyor may be used.

  A sizing / dispersing charging device 3 (ISF: Intensified Shifting Feeder) is a device for charging the pallet 6 with the sintered raw material 20 and forming the raw material layer 21. The sizing / dispersing charging device 3 (hereinafter referred to as ISF3) is charged finely on the upper layer side of the raw material layer 21 in the pallet 6 by charging the sintered raw material 20 in a dispersed manner. The raw material is charged, and the coarse raw material is charged to the lower layer side of the raw material layer 21.

  The ISF 3 includes a chute 4 for running and a plurality of bar members 5 that are inclined above the charging position of the sintering raw material 20 with respect to the pallet 6. The chute 4 is disposed obliquely below the drum feeder 2, receives the sintered raw material 20 dropped from the drum feeder 2, and slides it downward. Further, the plurality of bar members 5 are made of, for example, a circular bar-shaped steel material having a diameter of about 3 mm, and are connected to the lower end of the chute 4, and in the direction opposite to the traveling direction along the traveling direction (X direction) of the pallet 6. It is inclined and arranged so as to be at a lower position toward the (−X direction). The plurality of bar members 5 are arranged in a staggered pattern with a space therebetween in the height direction (Z direction) and the width direction (Y direction). Is arranged to be wide.

  With the ISF 3, the sintered raw material 20 is sized and dispersed according to the particle size, and then the coarse raw material falls to the far side from the ISF 3 and is deposited on the lower layer side of the raw material layer 21. On the other hand, the fine raw material falls to the vicinity of the ISF 3 and is deposited on the upper layer side of the raw material layer 21. Thus, the ISF 3 can charge the sintered raw material 20 to the pallet 6 so that the raw material layer 21 has continuous grain segregation in the height direction. Thereby, in the sintering step, the raw material layer 21 can be uniformly sintered in the height direction (Z direction) and the width direction (Y direction).

  The pallet 6 is a transport cart for moving the raw material layer 21 of the charged sintering raw material 20 in the horizontal direction (X direction). The raw material layer 21 in the pallet 6 is sintered until the pallet 6 moves from the charging position of the sintered raw material 20 by the ISF 3 to the sinter ore discharging position through an ignition furnace or the like. A sinter is produced.

  The movable bar 7 is a bar material for forming the air holes 10 in the raw material layer 21 of the sintered raw material 20 deposited on the pallet 6. Hereinafter, the bar 7 for forming the vent hole 10 is referred to as a vent bar 7. The ventilation bar 7 is made of, for example, round steel having a diameter of 19 mm and SUS304. However, the ventilation bar 7 is not limited to this example, and may be made of other materials and shapes. The ventilation bar 7 extends in parallel with the traveling direction (X direction) of the pallet 6 at the charging position of the sintering raw material 20 below the ISF 3. A plurality of such ventilation bars 7 are installed in the width direction (Y direction) and the height direction (Z direction) of the pallet 6 with a space between each other. It is determined as appropriate according to the operation status of the machine.

  Here, with reference to FIG. 3, the example of arrangement | positioning and the number of installation of the ventilation | gas_flowing bar 7 is demonstrated. FIG. 3 is a perspective view showing the arrangement of the ventilation bar 7 and the scraper 9 according to the present embodiment.

  As shown in FIG. 3, a plurality of ventilation bars 7 parallel to each other are arranged in a plurality of rows in the width direction (Y direction) of the pallet 6 and in a plurality of stages in the height direction (Z direction). In the illustrated example, two to three rows of ventilation bars 7 are arranged in three stages in the height direction (Z direction) in the width direction (Y direction), and these ventilation bars 7 are staggered on the YZ plane. Is arranged. Due to the staggered arrangement of the ventilation bars 7, the ventilation holes 10 can be formed in the raw material layer 21 at equal intervals.

  For example, when a general pallet 6 having a width of about 3 to 5 m is used, it is preferable to arrange the ventilation bars 7 at intervals of 10 to 50 mm in the width direction (Y direction) of the pallet 6. 6 to 50 ventilation bars 7 may be installed in the height direction (Z direction) in 2 to 5 stages in the Y direction). The arrangement and the number of the ventilation bars 7 are not limited to the above example, and can be appropriately changed according to the operation status of the sintering machine, but at least two rows or more in the width direction (Y direction) and the height. It is preferable to install a plurality of ventilation bars 7 in two or more stages in the direction (Z direction).

  As shown in FIG. 2, the ventilation bar 7 as described above is installed at the charging position of the sintering raw material 20 from the ISF 3 so that the tip side (X direction side) of the ventilation bar 7 is inside the raw material layer 21. The rear end side (−X direction side) of the ventilation bar 7 is exposed without being embedded in the raw material layer 21. When the pallet 6 is advanced in the traveling direction (X direction) in this state, the raw material layer 21 on the pallet 6 moves relative to the vent bar 7 in the X direction. A plurality of vent holes 10 extending in the X direction are formed at locations corresponding to 7 respectively. By providing this air hole 10, the air permeability in the raw material layer 21 can be increased, and the sintering speed and productivity of the sintering machine can be improved.

  The ventilation bar 7 is movable so that it can move forward or backward in the direction of travel of the pallet 6 (X direction). In order to make the ventilation bar 7 movable, a moving device 8 for moving the ventilation bar 7 in the X direction is provided. As shown in FIGS. 1 and 2, the moving device 8 includes a movable frame 81, a support plate 82 fixed to the lower portion of the movable frame 81, and a screw jack 83 connected to the upper end of the movable frame 81. Prepare. The rear ends of the plurality of ventilation bars 7 are fixed to the support plate 82 of the moving device 8. Further, the screw jack 83 moves the movable frame 81 in the traveling direction (X direction) of the pallet 6.

  With the moving device 8 having such a structure, the plurality of ventilation bars 7 are horizontally supported by the movable frame 81 and the support plate 82, and the plurality of ventilation bars 7 are moved in the traveling direction (X Direction) at the same time. Note that the configuration of the moving device 8 is not limited to the illustrated example, and any moving mechanism and driving mechanism can be used as long as the ventilation bar 7 can be moved in the X direction.

  Next, the fixed scraper 9 will be described. The scraper 9 is a scraping member for mechanically scraping the sintered raw material 20 deposited or adhered on the ventilation bar 7. The scraper 9 is made of, for example, a round steel made of SS400 having a diameter of 16 mm and made of SS400. However, the scraper 9 is not limited to this example, and may be made of other materials and shapes. For example, the scraper has a flat plate shape or a curved plate shape. It may be in the shape of a square bar or pipe.

  The scraper 9 is supported by a support device 11. The support device 11 includes a support bar 13 connected to both ends of the scraper 9 in the Y direction, and a fixed frame 12 to which the support bar 13 is attached. With the support device 11, the scraper 9 can be fixedly supported at a predetermined position.

  As shown in FIG. 3, the scraper 9 is disposed on the upper side of the ventilation bar 7 so as to extend in a direction intersecting the traveling direction (X direction) of the pallet 6. In the illustrated example, the scraper 9 is disposed so as to extend in a direction perpendicular to the X direction (Y direction). In addition, a plurality of scrapers 9 are arranged at intervals in the height direction (X direction) so as to correspond to the respective stages of the plurality of stages of ventilation bars 7. For example, in the example of FIG. 3, one scraper 9 is provided on the upper three ventilation bars 7, one scraper 9 is provided on the two middle ventilation bars 7, and the lower three One scraper 9 is provided on the ventilation bar 7.

  Thus, by installing one scraper 9 for each stage of the plurality of ventilation bars 7, one scraper 9 is used for the sintering raw material 20 deposited or adhered on the ventilation bars 7 of each stage. At the same time, they can be scraped and removed together. Therefore, the removal efficiency of the sintering raw material 20 adhering to the plurality of ventilation bars 7 can be increased, and the apparatus configuration of the scraper 9 can be simplified.

  As shown in FIG. 2, the scraper 9 is fixedly disposed at a position separated from a fall locus 15 of a sintering raw material 22 (hereinafter referred to as “charging raw material 22”) charged into the pallet 6 from the ISF 3. The charging raw material 22 and the scraper 9 are prevented from contacting and colliding with each other. Further, as described above, the scrapers 9 are arranged in a plurality of stages in the height direction (Z direction) of the pallet 6 so as to correspond to the plurality of stages of ventilation bars 7 bars, respectively. Along the fall trajectory 15 of the sintering raw material 20, the pallet 6 is disposed at a position shifted from each other in the traveling direction (X direction) and at a position separated from the fall trajectory 15.

  For example, in the example of FIG. 2, the fall trajectory 15 is inclined in the direction (−X direction) opposite to the traveling direction (X direction) of the pallet 6, but a plurality of scrapers are disposed along the inclination of the fall trajectory 15. 9 are arranged shifted in the X direction. The upper scraper 9 is disposed at a position that is most advanced in the X direction, while the lower scraper 9 is disposed at a position that is most retracted in the X direction, and the middle scraper 9 is the position of the upper and lower scrapers 9. It is arranged at an intermediate position in the X direction.

  Thus, in this embodiment, in order to avoid contact / collision with the charged raw material 22, the multistage scraper 9 is fixed, and the raw material is charged from the upper stage to the lower stage along the fall trajectory 15 of the sintered raw material 20. A multi-stage scraper 9 is disposed so as to move away from the position. Thereby, since the stroke length of the movable ventilation bar 7 in the X direction can be shortened, the apparatus configuration relating to the scraper 9 can be simplified and space saving can be realized.

  The fixed scraper 9 as described above. Sintering raw material deposited or adhered on the ventilation bar 7 when the movable ventilation bar 7 is moved backward in the direction (X direction) opposite to the traveling direction (X direction) of the pallet 6 by the moving device 8. 20 (hereinafter referred to as adhesion material 23) and mechanically scraping off the sintering material 20.

  Here, with reference to FIG.4 and FIG.5, the technical significance of using the said fixed scraper 9 is explained in full detail. FIG. 4 is a schematic diagram illustrating an interference state between the attached raw material 23 and the charged raw material 22 on the ventilation bar 7 according to the reference example, and FIG. 5 illustrates an interference state between the scraper 9 and the charged raw material 22 according to the reference example. It is a schematic diagram shown.

  As shown in FIG. 4, when the sintering raw material 20 is continuously inserted from the ISF 3 into the pallet 6, the charging raw material 22 gradually accumulates and adheres on the ventilation bar 7, and the adhesion raw material 23 on the ventilation bar 7. Is formed. As a result, since the charged raw material 22 from the ISF collides with the adhered raw material 23 on the ventilation bar 7, appropriate charging according to the particle size which is a characteristic of the ISF 3 is hindered, and the raw material layer 21 on the pallet 6 Abnormal segregation occurs. Here, abnormal segregation means that continuous grain segregation in the height direction (Z direction) of the pallet 6 does not occur properly (for example, coarse particles of the charged raw material 22 are charged into the lower layer side of the raw material layer 21. Or when the fine particles of the charging raw material 22 are not charged on the upper layer side of the raw material layer 21) or the charging raw material 22 having the same particle size in the width direction (Y direction) of the pallet 6 is uniformly charged. Means not.

  In order to solve the abnormal segregation due to the attached raw material 23, it is preferable to remove the attached raw material 23 by any method. However, in the method using the rotary ventilation bar described in Patent Document 4, the attached raw material 23 firmly attached to the ventilation bar 7 cannot be removed. Therefore, a method of mechanically scraping and removing the adhering raw material 23 on the fixed ventilation bar 7 ′ using a movable scraper 9 ′ is conceivable, but this method has a problem as shown in FIG. There is.

  That is, as shown in FIG. 5, when the ventilation bar 7 ′ is fixed, the scraper 9 ′ is movable, and the scraper 9 ′ is moved in the X direction to remove the adhering raw material 23 on the ventilation bar 7 ′, The scraper 9 ′ moving back and forth in the direction collides with the charged raw material 22. For this reason, as in the case of FIG. 4, appropriate charging according to the particle size by the ISF 3 is hindered, and abnormal segregation occurs in the raw material layer 21.

  Therefore, in this embodiment, as shown in FIG. 2, the aeration bar 7 is movable and the scraper 9 is fixed, and the fixed scraper 9 is installed at a position separated from the dropping locus 15 of the charged raw material 22. . During operation of the sintering machine, the movable vent bar 7 stopped at the forward limit position is moved backward to the reverse limit position on the fixed scraper 9 side (-X direction), so that the scraper 9 Is brought into contact with the attached raw material 23 on the ventilation bar 7, and the attached raw material 23 is mechanically scraped off and removed. Thereafter, the ventilation bar 7 is advanced in the X direction and stopped at the initial forward limit position.

  Thereby, the adhering raw material 23 on the movable vent bar 7 can be reliably removed by using the fixed scraper 9, and the collision between the scraper 9 and the charging raw material 22 can be prevented. Therefore, since the fall of the charging raw material 22 from the ISF 3 is not hindered by the attached raw material 23 and the scraper 9, continuous grain segregation of the raw material layer 21 in the height direction by the ISF 3 can be stably realized. Therefore, the raw material layer 21 can be uniformly sintered in the height direction (Z direction) and the width direction (Y direction) of the pallet 6.

[2. Removal method of adhering raw materials]
Below, with reference to FIG. 6A-D, the removal method of the adhesion raw material 23 using the raw material charging device of the sintering machine which concerns on this embodiment is demonstrated in detail. 6A to 6D are process diagrams showing a method for removing the attached raw material 23 according to the present embodiment.

  As shown in FIG. 6A, when the sintering raw material 20 is continuously charged from the ISF 3 to the pallet 6 during the operation of the sintering machine, the ventilation bar 7 is stopped at the forward limit position. At the forward limit position, the front end side of the ventilation bar 7 is embedded in the raw material layer 21 (not shown in FIG. 6), and the ventilation hole 10 is stably formed in the raw material layer 21 by the ventilation bar 7. (See FIG. 2). The fixed scraper 9 is disposed at a position separated from the falling locus 15 of the charged raw material 22, for example, at a position separated from the dropping locus 15 by 200 mm in the −X direction. For this reason, for example, the scraper 9 and the charging raw material 22 do not collide, and abnormal segregation of the raw material layer 21 does not occur. In addition, due to continuous charging from the ISF 3, the charging raw material 22 is gradually deposited and adhered onto the ventilation bar 7, thereby forming an adhering raw material 23. Therefore, before the abnormal segregation occurs due to the collision between the adhering raw material 23 and the charging raw material 22, the adhering raw material 23 on the ventilation bar 7 is periodically removed using the scraper 9 as shown in FIGS. 6B to 6D. Need to be removed.

  When removing the adhering raw material 23, first, as shown in FIG. 6B, the ventilation bar 7 is moved backward in the direction opposite to the traveling direction of the pallet 6 (−X direction) by the moving device 8. As a result, the adhering material 23 on the retreating vent bar 7 comes into contact with the fixed scraper 9, so that the adhering material 23 is mechanically scraped off by the scraper 9 and removed from the vent bar 7.

  FIG. 6C shows a state in which the ventilation bar 7 is retracted to the backward limit position in the −X direction and stopped. In this state, the adhering raw material 23 is completely removed from the ventilation bar 7.

  Next, as shown in FIG. 6D, the moving device 8 advances the ventilation bar 7 in the traveling direction (X direction) of the pallet 6 and stops it at the forward limit position. Thereafter, the ventilation hole 7 is maintained at the forward limit position until a predetermined amount of the attached raw material 23 is formed on the ventilation bar 7, so that the ventilation hole 10 is stably formed in the raw material layer 21.

  Through the above operation, the adhering raw material 23 on the movable ventilation bar 7 is periodically removed using the fixed scraper 9. At this time, the stroke length of the back-and-forth movement of the ventilation bar 7 moving forward and backward in the X direction is preferably equal to or greater than the maximum distance between the attached raw material 23 of the ventilation bar 7 and the scraper 9. For example, when the maximum distance between the attached raw material 23 and the scraper 9 is 260 mm, the stroke length of the ventilation bar 7 is preferably 260 mm or more. Thereby, the whole adhering raw material 23 on the ventilation bar 7 can be removed.

  Further, when the ventilation bar 7 and the scraper 9 come into contact with each other when the ventilation bar 7 moves forward or backward, the resistance of the forward or backward movement increases, and the movement operation of the ventilation bar 7 is hindered. For this reason, it is preferable to leave a predetermined gap (Z direction) between the vent bar 7 and the scraper 9 so that they do not contact each other. For example, the gap is preferably about 10 mm. As a result, contact between the ventilation bar 7 and the scraper 9 can be prevented, resistance during movement can be reduced, the ventilation bar 7 can be moved forward and backward normally, and wear of the ventilation bar 7 and the scraper 9 can also be prevented. it can.

[3. Summary]
The raw material charging device for the sintering machine according to the present embodiment and the method for removing the attached raw material 23 using the same have been described in detail above. According to the present embodiment, the fixed scraper 9 is installed at a position where it does not come into contact with the dropping trajectory 15 of the charged raw material 22 from the ISF 3, and the ventilation bar 7 can be moved in the traveling direction (X direction) of the pallet 6. A possible expression. Then, by retracting the movable vent bar 7 from the forward limit position to the fixed scraper 9 side, the attached raw material 23 on the vent bar 7 is brought into contact with the scraper 9, and the attached raw material 23 is mechanically removed. Thereafter, the ventilation bar 7 is advanced to return to the forward limit position.

  By automatically performing the operation of the ventilation bar 7 as described above, the attached raw material 23 on the ventilation bar 7 can be surely removed, and abnormal segregation in the raw material layer 21 can be prevented and continuously in the height direction by the ISF 3. Therefore, the air permeability in the raw material layer 21 can be stably secured, so that the raw material is spread over the entire width of the pallet 6 in the height direction (Z direction) and the width direction (Y direction). The layer 21 can be uniformly sintered, and the sintering speed and productivity can be improved.

  In addition, since the fixed scraper 9 is disposed at a position separated from the fall locus 15 of the charged raw material 22 from the ISF 3 to the pallet 6, the contact between the charged raw material 22 and the scraper 9 can be prevented. The abnormal segregation in the raw material layer 21 can be prevented. Furthermore, the stroke length of the scraper 9 at each stage is shortened by disposing the multi-stage scraper 9 in the height direction (Z direction) at a position shifted in the X direction along the fall trajectory 15 of the charged raw material 22. As a result, the equipment configuration of the charging device can be simplified to save space.

  In addition, it becomes possible to remove the attached raw material 23 at places that cannot be removed manually by the sintering machine, and the air permeability of the raw material layer 21 can be stably secured in the sintering process. Moreover, the removal work by the worker's manpower becomes unnecessary, and manpower can be reduced.

  The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to such examples. It is obvious that a person having ordinary knowledge in the technical field to which the present invention pertains can come up with various changes or modifications within the scope of the technical idea described in the claims. Of course, it is understood that these also belong to the technical scope of the present invention.

1 Hopper 2 Drum feeder 3 Granulated / Dispersed charging device (ISF)
4 Chute 5 Bar material 6 Pallet 7 Bar 8 Moving device 9 Scraper 10 Vent 11 Support device 12 Fixed frame 13 Support rod 15 Falling trajectory 20 Sintered raw material 21 Raw material layer 22 Sintered raw material 22 Charged raw material 23 Adhered raw material 81 Movable Frame 82 Support plate 83 Screw jack

Claims (3)

In the raw material charging device of the sintering machine, which charges the sintering raw material on the sintering machine pallet,
A sizing / dispersing charging device having a plurality of bar members arranged obliquely above the pallet;
A movable bar extending in parallel with the direction of travel of the pallet and forming a vent in the sintered raw material charged on the pallet;
A moving device for moving the bar in the direction of travel of the pallet;
On the upper side of the bar, the bar is arranged at a position separated from the fall trajectory of the sintering raw material from the sizing / dispersing charging device to the pallet, and the bar is moved by the moving device in a direction opposite to the traveling direction of the pallet. A fixed scraper that comes into contact with the sintering material adhering to the bar when retracted to
A raw material charging device for a sintering machine. The plurality of bars parallel to each other are arranged in a plurality of rows in the width direction of the pallet and in a plurality of stages in the height direction of the pallet,
The scrapers are arranged in a plurality of stages in the height direction of the pallet so as to correspond to the plurality of bars, respectively.
2. The scrapers of the plurality of stages are arranged so as to be shifted from each other in the advancing direction of the pallet along a fall trajectory of the sintering raw material from the sizing / dispersing charging device to the pallet. Raw material charging equipment for sintering machines. A plurality of the bars parallel to each other are arranged in a plurality of rows in the width direction of the pallet,
The scraper extends above the plurality of bars in a direction intersecting the traveling direction of the pallet, and when the plurality of bars are retracted in a direction opposite to the traveling direction of the pallet by the moving device. The raw material charging device of the sintering machine according to claim 1, wherein the raw material is in contact with the sintered raw material attached on the plurality of bars.

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