KR100341279B1 - Pallet truck in sintering system - Google Patents

Abstract

The side walls are arranged on both sides of the pallet body, and the lower end of the horizontal wall has a horizontal surface extending from the pallet body in the width-expanding direction to guide the air toward the opening for the air suction of the pallet body. A horizontal guide space between the grate at the end of each horizontal wall side and each horizontal wall to guide a part of the air sucked toward the opening side in the horizontal direction, and the height at the middle of the horizontal guide space. By setting the height of the opening side equally, the sintered minerals dropped through the gap of the grate are accelerated when passing through the horizontal guide space, but first, they collide substantially perpendicularly to the horizontal plane of the horizontal wall, thereby preventing the wear of the horizontal wall. Can be.

Description

Pallet Truck in Sintering Equipment {PALLET TRUCK IN SINTERING SYSTEM}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pallet truck in a sintering facility in which sidewalls are provided on both sides of the pallet main body to enable stacking of sintered raw materials, and the air openings are narrower than both sidewalls to guide the air out.

2, the overall schematic structure of the sintering apparatus 1 conventionally used is shown. In the conventional sintering facility 1, a plurality of pallet trucks are provided in an endless form between the mineral supply unit 2 and the mineral discharge unit 3 and move from the mineral supply unit 2 toward the mineral discharge unit 3. (4) is installed.

On the mineral supply part 2 side of the said sintering apparatus 1, the upper mineral tank 5 which supplies upper minerals (not shown) to the pallet truck 4, and the pallet truck 4 ), A raw material tank 6 for supplying the sintered raw material 6a, and an ignition furnace 8 for igniting the surface of the supplied sintered raw material layer 7 are provided.

Further, a window box 9 for sucking air in the downward direction of the pallet truck 4 is provided on the moving path from the mineral supply part 2 to the mineral discharge part 3.

In the sintering plant 1, the sintered raw material 6a is placed on the pallet truck 4 with the upper minerals interposed therebetween, and the ignition is performed in the ignition furnace 8, and the sintering raw material 6a is placed in the downward direction during the movement. The air is sucked in the provided window box 9, so that baking is performed.

In the pallet truck 4 of the sintering plant 1 shown in Figs. 2 to 4, the frame holding the guide wheel 10 is attached with an attachment bolt, and the grate 11 covers the entire upper surface. It is the structure which installed the pallet main body 12 arrange | positioned and the side wall body on both sides of this pallet main body 12, and was installed. Each side wall body has a lower side wall body 13 and a lower flange part 15 attached to the upper flange part 14 of the lower side wall body 13 with the attachment bolts attached thereto. In consideration of shrinkage due to sintering of 7), the upper side wall body 17 on which the inclined surface 16 is formed in order to widen the width placed thereon is provided.

In addition, the grate 11 is composed of a plurality of grate bar (grate bar) arranged in the width direction, these grate rods are supported between the plurality of front and rear support beams 12A installed in the pallet body 12 described above. have.

By the way, when air is sucked in the window box 9, it is important to uniformly sinter the entire surface of the sintered raw material layer 7 in order to improve the quality of the sintered mineral. However, it is usually difficult to sinter the sintered raw material layer 7 evenly over the entire width of the pallet truck 4.

The reason is that, as shown in Fig. 6, the sintering raw material itself shrinks in the vicinity of the upper sidewall body 17 as the sintering raw material 6a placed on the pallet main body 12 of the pallet truck 4 advances. This is because a gap δ is generated between the upper sidewall body 17 and the amount of air sucked in the gap δ increases to decrease the amount of air in the center portion. This is because the wind speed rises in the vicinity of the side wall portion from the center portion due to the wall effect and excessive air flows.

Thus, the following measures have been adopted to avoid such an uncomfortable situation. That is, as shown in FIG. 7, the opening opening (e) is narrower than the inlet opening width d (lattice plane) of the opening 18 for air suction in the pallet truck 4. Both side walls 19 under the grate of 18) are inclined, and by this structure, it was comprised so that the amount of suction air in the vicinity of the side edge of the pallet truck 4 may be reduced.

However, in the pallet truck 4 of the sintering facility shown in FIG. 7, the amount of the opening 18 is narrower than the inlet opening width d of the opening 18 for air suction. Since the side wall 19 is inclined, the sintered mineral (hereinafter referred to as "falling mineral") dropped through the gap of the grate (for example, 5 mm) during the sintering raw material layer 7 is sintered, the gap between the grate When it passes, it accelerates and collides with the side wall 19 of the opening 18 at an angle. For this reason, there exists a possibility that the inner surface of these side wall 19 may wear.

Moreover, in the sintering installation already installed, when inclining the side wall 19 under the grate of the opening part 18 so that the exit opening width e may become narrower than the inlet opening width d of the opening part 18, Since at least the pallet main body 12 needs to be manufactured and repaired, manufacturing cost has become very high.

According to the present invention, the side wall body is disposed on both sides of the pallet body, and the lower part of the side wall body extends in the width-expanding direction from the pallet body, and has a horizontal wall having a horizontal surface for guiding the air toward the suction opening of the pallet body. It is attached to the end.

Then, a plurality of grates for placing the sintered raw material are installed in a row in a row between both horizontal walls, and a part of the air drawn toward the opening side is horizontally spaced between the grate at each end of each horizontal wall and each horizontal wall. The horizontal guide space which guides to a direction is formed, and the height of this horizontal guide space and the height of an opening side are set equally.

According to the above configuration, since the height of the horizontal guide space is set equal to the height of the opening side, the falling minerals that fall through the gap of the grate are accelerated when passing through the gap of the grate, but are first The impact of the vertical wall against the vertical reduces wear on the horizontal wall.

In addition, since the height of the opening side is set higher than the height of the horizontal guide space, the flow velocity of air is slowed at the opening side, so that the falling minerals are not necessarily absorbed by the opening, but may be deposited on the opening side. In this case, the deposited falling minerals fulfill the function of the cushioning material, and the wear of the horizontal walls is further reduced.

Then, when the falling minerals are deposited on the opening side and the height of the opening side of the horizontal guide space decreases, the flow velocity of air in the portion is increased, so that the falling minerals are blown toward the opening, and the height of the horizontal guide space and the opening side Since the height becomes substantially equal, the air passing through the sintered raw material is made uniform, so that it is possible to sinter reliably and evenly over its entire width.

In addition, in the above-described configuration, since the portion of the pallet truck already installed can be used a lot, the manufacturing cost can be reduced.

In addition, since the heat insulating material (which combines the wear-resistant liner) is provided along the horizontal guide space on both horizontal walls, the heat transfer to the horizontal walls is reduced, and the thermal stress at the widened width portion of the pallet is reduced. No effort in design

1 is an enlarged view of an important part of a pallet truck in a sintering plant showing an embodiment of the present invention.

2 is a side view combined with a conventional example showing the overall configuration of a sintering plant of an embodiment of the present invention.

3 is the same enlarged side view.

4 is an enlarged view of an important part of a pallet truck in a conventional sintering facility.

Fig. 5 is an enlarged view of an essential part of a pallet truck in a sintering facility showing another embodiment of the present invention.

6 is a sectional view of a pallet truck for explaining a conventional example.

7 is a sectional view of a pallet truck for explaining the same conventional example.

* Description of the symbols for the main parts of the drawings *

1 ‥‥‥‥‥‥‥‥ Sintering facility 2 ‥‥‥‥‥‥‥‥ Mineral supply

3 ‥‥‥‥‥‥‥‥ Mineral Discharge Part 4 ‥‥‥‥‥‥‥‥‥

9 ‥‥‥‥‥‥‥‥ Window box 11 ‥‥‥‥‥‥‥‥ Grate

11A ‥‥‥‥‥‥‥‥ Grate 12 ‥‥‥‥‥‥‥‥

20 ‥‥‥‥‥‥‥‥ Frame 21 ‥‥‥‥‥‥‥‥ support beams

22 ‥‥‥‥‥‥‥‥ Horizontal wall 22A ‥‥‥‥‥‥‥‥

25 ‥‥‥‥‥‥‥‥ Inclined walls 27 ‥‥‥‥‥‥‥‥ air

28 ‥‥‥‥‥‥‥‥ Extension 29 ‥‥‥‥‥‥‥‥ Horizontal Information Space

h1 ‥‥‥‥‥‥‥‥ height of horizontal information space

h2 ‥‥‥‥‥‥‥‥ height of opening

The invention is explained in more detail on the basis of the attached figures 1 to 2. 2 and 3 combine the embodiment of the present invention with the conventional form.

2 shows the overall schematic configuration of the sintering equipment 1 according to the embodiment of the present invention. In the sintering facility 1 shown in this drawing, a plurality of steps are provided between the mineral supply unit 2 and the mineral discharge unit 3 in an endless shape and moved from the mineral supply unit 2 toward the mineral discharge unit 3. A large pallet truck 4 is provided.

As shown in Fig. 1, the pallet truck 4 has a main body central portion 9A having an opening 9B for air suction, a frame 20 on both sides provided with guide wheels 10, and this frame. The lower flange portion 23a is provided on the horizontal wall 22 having the horizontal surface 22A extending in the width-expanding direction on the upper portion of the 20, and the lower flange portion 23a on the flange portion 22a of each horizontal wall 22. Side wall is attached upright. The inclined wall 25 which guides the lower flange part 25a to the upper flange part 23b of this side wall body by attaching the bolt nut 26 to push the air 27 toward the opening part 9B mentioned above. It is. A plurality of grates 11 are arranged in a row across both side wall bodies and are provided with a grate 11 on which the sintered raw material 6a is placed.

The grate 11 is supported between the plurality of front and rear support beams 21 installed at the center portion 9A of the pallet body, and the support beams 21 extend to the upper side of the horizontal wall 22. And a plurality of grate 11A is also arranged in this extension part 28. The grate 11 and the grate 11A are formed in the same shape.

Then, a part of the air 27 sucked toward the opening 9B side between the grate 11A at the upper end of each horizontal wall 22 and the horizontal surface 22A of each horizontal wall 22. A horizontal guide space 29 for guiding the horizontal direction is formed, and the height h2 on the opening 9B side is set higher than the height h1 of the horizontal guide space 29.

In the above configuration, as shown in FIG. 2, the upper mineral is supplied to the pallet truck 4 from the upper mineral tank 5, and the sintered raw material 6a is supplied from the raw material tank 6, and the sintered raw material layer ( 7), the ignition furnace (8) ignites the surface of the sintered raw material layer (7), and during the movement of the pallet truck (4) according to the rotation of the guide wheel (10), the window box (9) in the downward direction ) Is sucked into the air, and the sintered raw material layer 7 is fired, and the sintered raw material 6a becomes a sintered mineral and is discharged from the mineral discharge part 3.

By the way, during the movement of the pallet truck 4, when the air is sucked in the downward window box 9 and baking of the sintered raw material layer 7 is performed, the sintered raw material layer (in the vicinity of the inclined wall 25) 7) The shrinkage itself causes a gap δ between the sintered raw material layer 7 and the inclined wall 25.

In order to prevent the amount of air sucked in the gap δ from increasing and decreasing the amount of air in the center portion, in the embodiment of the present invention, the opening width of the inlet side of the pallet truck 4 (grating surface) The horizontal wall 22 is provided so that the exit side opening width e may be narrower than in (d), and the amount of suction air near the side edge of the pallet truck 4 is reduced. By this structure, air is uniformly passed through the sintered raw material layer 7, and the sintered raw material layer 7 can be sintered evenly over the whole width.

However, the height h1 of the horizontal guide space 29 is lower than the height h2 on the side of the opening 9, so that the falling minerals falling through the gap of the grate 11A are weak between grate (grate). It is accelerated when passing through a 5 mm suction air cylinder and a gap), and impinges substantially perpendicularly to the horizontal plane 22A of the horizontal wall 22.

Therefore, as in the related art, when passing through the gap of the grate, the falling minerals are accelerated and do not obliquely collide with the side wall 19 of the opening 18, so that the inner surface of the side wall 19 can be avoided. Further, the falling minerals accelerate when passing between the grates and collide substantially perpendicularly to the horizontal plane 22A of the horizontal wall 22, so that the wear of the horizontal wall 22 is small.

However, since the height h2 on the side of the opening 9 is set higher than the height h1 of the horizontal guide space 29, the flow velocity of the air 27 in the horizontal guide space 29 is slowed down. Therefore, the case where the falling minerals are not necessarily limited to being absorbed by the window box 9 can be considered to be deposited on the horizontal wall 22. In this case, the accumulated falling minerals fulfill the function of the cushioning material, and wear of the horizontal wall 22 is further reduced.

Then, when the falling minerals are deposited on the horizontal wall 22 and the height h2 on the side of the opening 9B of the horizontal guide space 29 becomes small, the flow velocity of air in the portion is increased, so that the falling minerals are in the window box. Blown toward (9), the height h1 of the horizontal guide space 29 and the height h2 of the side of the opening 9B become substantially equal, so that the horizontal guide space 29 is not blocked, and the sintered raw material layer Since the air 27 passing through (7) becomes uniform, it can be sintered reliably and evenly over its entire width.

In addition, the sintered minerals are discharged as the pallet truck 4 is reversed, but some of the falling minerals deposited in the horizontal guide space 29 remain as they function as a cushioning material again.

In addition, as shown in FIG. 7, the side wall 19 of the opening 18 (lower grating) is narrowed so that the exit opening width e is narrower than the inlet opening width d (grating surface) of the opening 18. In the case of inclination, since the pallet main body 12 needs to be manufactured and repaired at least, there existed a subject that manufacturing cost became very high.

However, according to the embodiment of the present invention, for example, the guide wheel 10, the lower side wall 13, and the inclined surface 16 are removed from the pallet truck 4 already installed in FIG. By attaching a new frame 20 to the side and adding the extension 28 and the grate 11A, it is possible to manufacture (modify), so that a lot of the parts already installed can be used, thus reducing the production cost. have.

Moreover, in the said embodiment, the air 27 attracted toward the said opening part 9B side between the grate 11A of the upper end part of each horizontal wall 22, and the horizontal surface 22A of each horizontal wall 22. The horizontal guide space 29 which guides a part of the horizontal guide space 29 is formed, and the height h2 of the opening 9B side is set higher than the height h1 of the horizontal guide space 29.

However, embodiment of this invention is not limited to this structure, For example, the height h1 of the horizontal guide space 29 and the height h2 of the opening part 9 side are set equal, and the other structure is It can also be configured similarly to the above embodiment.

Even in this case, even if the falling minerals accelerate when passing between the grates, they collide substantially perpendicularly to the horizontal plane 22A of the horizontal wall 22, so that the wear of the horizontal wall 22 is reduced.

Furthermore, in the above-described embodiment, the height h2 on the side of the opening 9B is set higher than the height h1 of the horizontal guide space 29, or the height h1 and the opening of the horizontal guide space 29 are higher. Although the height h2 on the side of (9B) was set equally, it is not limited to this structure, As shown in FIG. 5, the heat insulating material (inside the horizontal guide space 29 in both horizontal walls 22) is shown. As a wear-resistant liner, for example, 25Cr cast iron is used) 30 may be a structure in which the bolt nut 31 is attached and detached freely. Thus, the heat insulating material 30 is formed on both horizontal walls 22. ) Is easy to attach to the bolt and nut 31, and by this configuration, the heat dissipation of both horizontal walls 22 is improved, which is advantageous in terms of thermal stress (the thermal stress of both horizontal walls 22 is reduced). Therefore, the design of the pallet truck 4 becomes easy. Moreover, although the side wall body is divided | segmented in the up-down direction, it is integral It may be formed.

As described above, the pallet truck in the sintering plant according to the present invention has horizontal guide spaces arranged on both sides of the pallet main body under the grate for guiding the air to push the air toward the air suction opening of the pallet main body. Suitable for pallet trucks in sinter plants.

Claims (3)

The side wall bodies are disposed on both sides of the pallet body, and the lower portions of these side wall bodies extend in the width-expanding direction from the pallet body and are attached to the ends of the horizontal wall having a horizontal plane for guiding the air toward the air suction openings of the pallet body. And a plurality of grates on which the sintered raw material is placed are arranged in a row between two horizontal walls, and a portion of the air sucked toward the opening side between the grates at the ends of each horizontal wall and each horizontal wall toward the opening side in the horizontal direction. A pallet truck in a sintering facility, wherein a horizontal guide space for guiding is formed, and the height of the horizontal guide space and the height of the opening side are set equally. The side wall bodies are disposed on both sides of the pallet body, and the lower portions of these side wall bodies extend in the width-expanding direction from the pallet body and are attached to the ends of the horizontal wall having a horizontal plane for guiding the air toward the air suction openings of the pallet body. And a plurality of grate on which the sintered raw material is placed is arranged in a row between both horizontal walls, and a part of the air sucked toward the opening side between the grate at the end of each horizontal wall side and each horizontal wall in the horizontal direction. A pallet truck in a sintering facility, wherein a horizontal guide space for guiding is formed, and a height at the opening side is set higher than that of the horizontal guide space. The pallet truck in a sintering plant according to claim 1 or 2, wherein heat insulating materials are provided along horizontal guide spaces on both horizontal walls.