JP6395494B2 - Sintering cooler - Google Patents

Description

  The present invention relates to a sintering cooler for backflow operation and a method for cooling a sintered body.

  In a sintering apparatus, fine particles that have been agglomerated by a sintering process are generally used. In the sintering process, a porous body is usually formed from the particles while roughly maintaining their chemical properties. The product of the sintering process—sintered body—is used in subsequent processes. For example, in steel production, it is known to make sintered bodies from steel and other particles, which are later used in blast furnaces. After the sintering process, the sintered body initially having a high temperature such as 600 ° C.-700 ° C. is cooled in the sintering cooler to a temperature of 100 ° C., for example.

  In the normal type of sintering cooler, the high temperature sintered body is supplied by falling by its own weight into the shaft through the upper charging opening. At the lower end of the shaft, the sintered body is scraped out by, for example, a scraper from the discharge opening. While the sintered body falls in the shaft, a cooling gas (usually air) is guided from the shaft, the sintered body is cooled and the gas is heated. For example, it is possible to use heated gas for the heat recovery process to recirculate to the sintering apparatus and / or to produce steam that can drive the generator.

  In addition to a counter-flow axis type cooler in which the cooling gas flows mainly horizontally, a counter-flow cooler in which the general movement of the cooling gas faces vertically upward through the sintered body while the sintered body moves downward may be used. Also known. These coolers are very effective in terms of heat transfer between the sintered body and the gas. The gas enters the lower part of the shaft and is sucked upwards towards the top of the shaft and is guided to some heat recovery means. A common type of sintering cooler has an annular shaft, and the sintered body is housed in the shaft and cooled. A charging device such as a chute is provided at a predetermined position on the shaft, and the shaft itself is rotatably arranged. During operation, the shaft is rotated so that different parts of the shaft can continuously charge the sinter with the charging device. The air inflow blades are disposed tangentially on the lower portions of the inner and outer walls of the shaft. An airtight hood is installed at the top of the shaft and connected to an air suction fan or the like.

  Especially when a new sintering cooler is installed in an existing sintering plant, the main target tries to minimize the installation area of the cooler. This is because there is generally a very limited space within the area. Since it is economically unacceptable to close the sintering plant for a long time, the existing sintering cooler must normally remain in operation while installing a new sintering cooler.

  Even if the installation area of the cooler is reduced, the required air flow rate does not change. Because it is an essential requirement of the cooling process that depends on the amount of sintered body to be cooled that is a specific multiple of the specific air to sintered body ratio (y ton air / z ton sintered body). It is. Thus, the airflow velocity increases when guided through a cooler with a given air flow rate. This creates a problem because the pressure drop across the sintered bed is even greater than proportional to the increase in air velocity. On the other hand, since the pressure drop is proportional to the power consumption of the air suction fan, the operating cost in the sintering cooler depends mainly on the pressure drop through the sintering bed. Therefore, in order to avoid an increase in operating costs due to the small footprint, the air velocity through the sintering bed and the associated pressure drop should be as low as possible.

  One option to achieve this is to increase the horizontal cross-sectional area of the shaft. This is done by reducing the diameter of the inner shaft wall. That is, the shaft becomes wider while maintaining its outer diameter. While air velocity—and thus pressure drop—is generally reduced through this means, air dispersion is an important issue. In a conventional cooler of the type described above, air inlet vanes are incorporated in the lower portions of the inner and outer shaft walls from which cooling air enters the shaft. For narrow shafts (less than 1 m wide), it is assumed that after a predetermined inflow, for example 1 m, air is evenly distributed through the entire shaft cross section. For wide shafts (e.g. 1.5 m and above), the distance from the air inlet vane to the shaft center is longer and there are certain boundary effects (e.g. selective flow along the shaft wall), so this uniform mixing is Longer distances are needed. However, uneven distribution of cooling air results in an undesirable cooling process. That is, the sintered body is not effectively cooled and / or the air is not optimally heated.

  It has been proposed to solve this problem by arranging an air duct arranged radially in the lower part of the shaft and communicating with an additional tangential inflow vane at a predetermined position between the inner and outer walls. ing. While these installations improve the supply of cooling air into the inner region of the shaft, the additional factors are relatively complex, resulting in significant frictional forces and reduced life. This is the reason why the shaft is generally a downward taper, which increases the speed of the sintered body in the lower part.

  Accordingly, it is an object of the present invention to provide a sintered cooler in which air flow with high uniformity is achieved while avoiding excessive friction. This object is achieved by a sintering cooler according to claim 1 and a method according to claim 12.

General aspects of the invention

  The present invention provides a sintered cooler for backflow operation. Backflow operation means that the cooling gas, usually air, flows in the opposite direction to the movement of the sintered body being cooled. However, this also includes small areas where the flow is oblique or perpendicular to the movement of the sintered body. As mentioned above, such a sinter cooler is part of a combined sinter plant and cools the high temperature sinter from high temperature to low temperature or at least medium to low temperature. On the other hand, in the following examples, other gas may be used as “air” and “air stream”, and even such a case is understood to be included in the present invention.

  The cooler is an annular shaft that houses a sintered body, the shaft comprising at least one upper opening and at least one lower discharge opening. The shaft is annular. That is, the shaft is usually ring-shaped and is at least symmetrical with respect to the axis. Such a shaft shape may not be a perfect circle but may be a polygon, and in this case, it is treated as a “circle” in this specification. The circular shape of the shaft and the shaft described above defines the radial and tangential directions, and such radial and tangential directions are used below. Usually, the shaft is rotatably arranged on a part of the shaft installed in the charging device, and the charging device is supplied by a sintering device. The charging device supplies a sintered body to a part of the shaft, and the shaft rotates continuously or intermittently around the axis of symmetry so that the sintered body is inserted into all parts. The high temperature sintered body is fed through at least one charging opening and the cooled sintered body is extracted (or simply falls) at the discharge opening. As mentioned above, the upper part of the shaft may be covered by an airtight hood, which is connected to an air suction device. Generally, the sintered body is installed so as to create a negative pressure in or on the upper part of the shaft.

  According to the present invention, in the lower portion, the shaft is divided into a plurality of small chambers, and each small chamber is divided in a tangential direction. Tangent direction means the tangential direction defined by the circular shape of the shaft. The shaft in the upper part near the charging opening is single and preferably has a continuous structure along the tangential (ie, circumferential) direction, but the lower part is divided into small chambers. In other words, the shaft is branched into a plurality of small rooms below, and the small rooms are divided along the tangential direction. Therefore, although the shape of the shaft is not continuous in the lower part, the overall shape of the shaft is a circular shape. The cross-sectional shape of the small room may be, for example, a circular shape, a polygon, or the like.

  Each compartment comprises at least one side wall with a radially extending radial inlet vane for drawing cooling air into the shaft. Since the small rooms are spaced apart, each small room is separated by a side wall. The radial inflow vane is installed on at least one such side wall. Usually, of course, the radial inflow blade is installed so that the sintered body cannot fall through the radial inflow blade by gravity. That is, the inflow blade guides the sintered body to remain in the small chamber. The radial inflow blades extend in the radial direction and are preferably arranged in the radial direction. However, the radial inflow blades may have, for example, a discharge (vent) shape that does not completely correspond to the radial direction, or may be inclined with respect to the radial direction. In either case, one end of each inflow blade is disposed radially outward from the other end.

  During operation, the sinter cooler is inserted through the charging opening, the sintered body is moved down through the small chamber to the discharge opening, and the cooling gas enters from the radial inlet vane and through the shaft upwards. It is configured to be inhaled. That is, the fallen object of the sintered body passes through the small chambers, and the sintered body is divided into different small chambers. The radial inflow vanes direct the air flow into the sintered body from approximately the tangential direction. Furthermore, this air flow directly acts on the radially extending region of the small chamber and the sintered body therein. Conventionally, only the inflow blades arranged in the tangential direction, which generate a non-uniform air flow in the radial direction, are greatly improved to a uniform air flow in the present invention. When the configurations are compared, the present invention is simpler and wear is reduced by installing the air duct in the lower portion.

  In order to ensure a wide inlet area for the cooling air, it is preferred that the radial inflow vanes extend more than 50% of the radial width of the small chamber. More preferably, the radial inlet vanes extend more than 70% or more than 90% of the radial width of the small chamber. In such an embodiment, most of the side wall of the small room is opened for air suction, and the small room is opened as such to make the air flow more uniform along the radial direction. The radial inflow blade may be arranged over the entire radial width.

  Since the small rooms are spaced apart, there is a space between the adjacent small rooms where cooling air is drawn into each small room. The cooling air enters this space, for example, from radially inward and / or outward. In some embodiments, the space has a lower side opening that allows cooling air to enter the space from below. There is virtually no need to place a bottom plate or such between the small rooms. That is, since the sintered body that falls by its own weight cannot enter the space from below, the space between them may be completely opened downward.

  In some embodiments, particularly when the tangential width of each compartment is relatively large, the concept of the invention is that each compartment has at least one side wall with a tangential inflow vane extending tangentially. Will be improved. Such tangential inflow vanes, known from the prior art, are arranged on the (radial) inner and / or outer walls of the chamber. The tangential blades are preferably arranged in the tangential direction, but may not sufficiently correspond to the tangential direction or may be inclined with respect to the tangential direction. Preferably, the tangential vanes may be greater than 50%, greater than 70%, greater than 90%, or extend throughout the tangential width of the small room. Where the radial and tangential vanes extend across the entire width of the chamber, the radial and tangential vanes may be connected or may be composed of a single piece. In such cases, it may be a kind of “circumferential” vane that constitutes the tangential and radial vanes.

  In an exemplary embodiment of the invention, the radial width of the shaft decreases downward. In other words, the wall of the shaft is inclined inward. In this embodiment, which is the typical cooler design already described above, the speed of the descending sintered body increases downwards, thus increasing the risk of wear stress. In this case, the inventive concept is particularly advantageous since no further air ducts or the like are required in the lower part of the shaft.

  More preferably, the tangential width of each small room decreases downward. In other words, each side wall of the small room is inclined inward. On the other hand, the width of the space between adjacent small rooms increases downward and the top becomes relatively small. Accordingly, the side walls of two adjacent small chambers form a somewhat roof-like structure, which can smoothly deflect the sintered body descending from above into each small chamber.

  Depending on the shaft design, the cooling air tends to move along the inner and outer walls, which can result in a non-uniform airflow. One method for avoiding this is to dispose at least one shape forming means for making the upper shape of the sintered body concave in the radial direction. In other words, the height of the sintered body along the radial direction is higher toward the inner wall and the outer wall than between them. Simply put, the exit of the sintering bed is shortened in the central region of the shaft, which means that the cooling air tends to move towards the center and away from the side walls. Such shape forming means may be a scraper acting on the sintered body from above. In the present specification, the rotation of the shaft is used for the shape forming means to function like a ridge that forms a “groove” in a stationary sintered body.

  In the present specification, it is particularly preferred that the shape forming means is adjustable. For example, the vertical position of the shape forming means can be adjusted, or even the shape of the forming means itself can be changed. Usually, such adjustments are made while the plant is out of service. However, it should also be taken into account that the driving means are arranged to make these adjustments during operation.

  As is well known, the sintered body entering the cooler is composed of particles of different sizes. Smaller size particles are more compactly compressed and the air gap remaining between the particles is smaller. Thus, the area with larger particles leaves a larger area for air to pass through and becomes the preferred path for cooling air. This effect is used in other embodiments of the present invention. In this embodiment, at least one dispersing means is provided, and the dispersing means is installed so as to charge the sintered body mainly toward the radially inner side wall and the radially outer wall of the shaft. In the region of the radially inner wall and the radially outer wall of the shaft, the sintered body is excessively deposited and falls down. Here, the large particles roll farther than the small particles and collect in the middle between the outer and inner edges. Thus, a kind of “size gradient” is formed with a sintered bed with the smallest particles on the inner and outer walls and the largest particles in the middle. Accordingly, the cooling air moves preferentially from the side wall through the center. It should be noted that similar effects can also be formed by the shape forming means described above. For example, when the forming means first forms a shape exceeding the angle of repose of the sintered body, the sintered particles roll down the slope.

  The airflow in the central area of the shaft is dramatically improved. According to another embodiment of the invention, at least one discharge system is arranged in the upper part of the shaft, which is embedded in the sintered body and is designed to draw air locally into the shaft during operation. Has been. The discharge system is installed in the upper part of the shaft, and its position is where the lowering speed of the sintered body is not as great as in the lower part in order to reduce wear. Compared to conventional suction means located outside the shaft and above the sintering bed, the discharge system is arranged to be embedded in the sintered body during normal operation of the cooler. The discharge system comprises at least one air duct having at least one opening. The opening is usually arranged in the (radial) central region of the shaft. If the discharge system is designed to draw air into the shaft, a further cooling air source in the central region is arranged. Cooling performance is improved.

  Another option for improving the contact between the sintered body and the cooling air is to redirect the sintered body to move in the direction of the airflow, even when the airflow occurs primarily near the shaft wall. There is. This is done by a central deflection element arranged on the shaft and designed to change the sintered body radially inward and outward from the radially central region of the shaft. This deflection element may be an annular beam arranged annularly on the shaft. Further, the deflection element may be positioned below the small room. In any case, the deflection element has an inclined upper surface, which forms a roof-like structure for optimal deflection of the sintered body. The lower edge of the deflection element may be above the lower edge of the chamber. That is, the deflection element need not extend from end to end of the small room. An important improvement in the backflow effect is achieved when the sintered body flow is divided by the deflection element, towards the shaft wall and merged below the deflection element.

  The present invention is a method for cooling a sintered body in a sintering cooler having an annular shaft containing the sintered body, the shaft comprising at least one upper opening and at least one lower discharge opening, In the section, the shaft is divided into a plurality of small chambers divided in a tangential direction, and each small chamber is provided with at least one radial inflow blade extending in the radial direction to allow cooling air to flow into the shaft. Side walls. In this method, the sintered body is charged through the charging opening, the sintered body moves downward through the small chamber to the discharge opening, and the cooling air is sucked upward through the inlet shaft through the inlet blade. including.

  A preferred embodiment of the method of the present invention corresponds to the sintered cooler of the present invention.

Preferred embodiments of the present invention will now be described by way of example with reference to the accompanying drawings.
The perspective view of the shaft for sintering coolers based on the 1st Embodiment of this invention. The sectional side view of the sintering cooler provided with the shaft from FIG. The perspective view of the shaft for sintering coolers based on the 2nd Embodiment of this invention. The sectional side view of the sintering cooler based on the 3rd Embodiment of this invention. The sectional side view of the sintering cooler based on the 4th Embodiment of this invention. The sectional side view of the sintering cooler based on the 5th Embodiment of this invention. The sectional side view of the sintering cooler based on the 6th Embodiment of this invention.

  FIG. 1 shows a perspective view of a shaft 2 for a sintered cooler 1 according to the invention in a simple expression. The shaft 2 has an inner wall 3 and an outer wall 4 and is generally circular or annular. The shaft 2 has an upper charging opening 5, and the charging opening 5 extends in the circumferential direction between the upper edge of the inner wall 3 and the upper edge of the outer wall 4. A portion of the outer wall 4 has been removed in FIG. 1 to show the interior of the shaft 2. In the lower part 2.1, the shaft 2 is branched into a plurality of small chambers 7, each having a discharge opening 6 at the lower end. During operation, the sintered body 100 is inserted into the shaft 2 through the charging opening 5, falls due to gravity, and moves to the respective discharge openings 6 through the small chamber 7. The rotation of the shaft 2 around the axis of symmetry ensures a uniform discharge of the sintered body 100.

Each small room 7 is separated by a side wall 8 installed in the radial direction, and such a side wall faces the adjacent small room 7. In order to form a roof-like structure, the side walls 8 of adjacent chambers 7 are inclined inward. A radial blade (also referred to as a radial inflow blade in this specification) 9 that defines a plurality of radial inflow slits is installed on each of the side walls 8. Each radial inflow blade 9 extends beyond about 80% of the radial width of the small chamber 7. During operation, negative pressure is provided above the upper part 2.2 of the shaft, so that air passes through the small chamber 7 and the upper part 2.2 of the shaft via the radial inlet vanes 9. Sucked into. Accordingly, the air moves in the opposite direction with respect to the descending sintered body 100. In the illustrated embodiment, the tangential side wall 10 of the chamber 7 is completely closed and no inflow vanes are formed. A sufficiently uniform flow is ensured by dividing the shaft 2 into several small chambers 7 and installing the combined radial blades 9, which effectively cools the sintered body 100. In the illustrated embodiment, the shaft 2 is divided into 12 compartments 7. This number can of course be different, in particular a large number, up to 20 or 50. In the illustrated embodiment, the space 11 between adjacent chambers 7 has a lower opening 12 as well as a radially inner and outer opening 13. However, it should be noted that such a configuration works even in the absence of the lower opening 12 or at least one of the inner and outer openings 13.

  FIG. 2 is a side sectional view of a part of the sintered cooler 1 provided with the shaft 2 from FIG. As will be understood more clearly from this description, the radial width of the shaft 2 decreases downward. For structural stability, the inner shaft wall 3 is connected to the support structure 14, and the two shaft walls 3, 4 are connected by three connecting beams 15 mounted in the horizontal direction. During operation, a charging device (not shown) of the sintering plant is positioned on the charging opening 5 of the shaft 2, and the sintered body 100 is dropped onto the shaft 2 by gravity as described above. An airtight hood connected to the air suction system is installed on the upper part 2.2 of the shaft 2. However, these elements are not shown in FIG. Such a shaft is mounted on a rotatable platform 16 which slowly rotates on a circumferential track so that a fixed charging device is continuously located on different areas of the shaft 2. In the lower discharge opening 6, a fixed barge 17 is provided, which is used to remove the cooled sintered body 100 from the shaft 2. Looking more closely at this, each element comprises four inflow vanes 9 on both sides, such inflow vanes extending in the radial direction over about 80% of the width of the chamber 7. Of course, this is an example, and the number of blades 9 may be more or less than this, and may extend a little more than this.

FIG. 3 is a perspective view showing a second embodiment of the shaft 2a according to the present invention. This embodiment is mainly similar to the shaft 2 shown in FIGS. 1 and 2, and has a small chamber 7 a having a radial inflow blade 9. However, this embodiment further includes a tangential vane 18 ( also referred to herein as a tangential inflow vane) that defines a tangential inflow slit installed in each small room. In the present embodiment, the radial inflow blade 9 and the tangential inflow blade 18 extend more than approximately 80% of the width of the respective small chambers 7a. However, they may be arranged throughout the width direction so that they can substantially form a single circumferential inflow vane. When the tangential inflow blade 18 is installed, the air inflow area is increased, and therefore the air velocity at the inlet can be reduced. Furthermore, the air flow uniformity is improved particularly in the lower portion of the shaft 2a provided with the small chamber 7a.

  FIG. 4 is a schematic cross-sectional view of a sintered cooler 1b according to the third embodiment. This embodiment uses the shaft 2a from FIG. 3 and has inner and outer tangential inflow vanes 18. In order to further enhance the effect of the backflow even when the air has a tendency to move along the side walls 3a, 4a of the shaft 2a, the deflection beam 19 is arranged in the circumferential direction in the (radial) central region of the shaft 2a Has been. The deflecting beam 19 is arranged in the middle or lower part of the shaft 2a, but it is somewhat above the tangential inflow vane 18, for example just above the chamber 7a. On the other hand, the deflected beam may be installed in each small room 7a. As can be seen from FIG. 4, the deflection beam 19 does not extend from the upper end to the lower end of the shaft 2a. That is, the deflection beam does not completely separate the lower part. The function of the deflected beam is to divide the descending sintered body 100 into two flows (black thick line arrows). When the sintered body 100 collides with air moving upward (white thick line arrows), The two flows are brought closer to the inner and outer walls. Below the deflecting beam 19, the two streams may merge again.

  FIG. 5 is a schematic cross-sectional view of a sintered cooler 1c according to the fourth embodiment, and this embodiment uses the shaft 2a from FIG. Here, the sintered body 100 is not charged uniformly along the radial direction, but is preferentially charged toward the inner wall 3a and the outer wall 4a. This is simply due to the roof-type dispersion element 21, which is installed at the end of the chute (not shown) of the charging device. The sintered body 100 is accumulated and rolls or slides on the inclined surface toward the central portion 20 of the shaft 2a. This process produces a certain degree of separation. This is because large particles tend to move farther than small particles. However, since the center 20 of the shaft 2a is a preferred flow path, large particles leave a space for air to pass through. Accordingly, the cooling air (white thick arrow) moves away from the side walls 3a and 4a toward the center 20 of the shaft 2a.

  FIG. 6 is a schematic cross-sectional view of a sintering cooler 1d according to the fifth embodiment. In the present embodiment, the sintered body 100 is dispersed throughout the radial direction of the shaft 2 a, but the scraper 22 acts to form a concave shape in the uppermost layer of the sintered body 100. Since the scraper 22 is fixed and the shaft 2a rotates, it functions in the same manner as a scissors. The concave shape means that the total height of the sintered layer in the middle of the shaft is lower than that of the inner wall 3a and the outer wall 4a. The length from the tangential inflow blade 18 to the center of the concave shape is reduced according to the distance between the inner edge and the outer edge of the concave shape. Therefore, the cooling air (white thick arrow) is at least partially deflected from the side walls 3a, 4a to the center of the shaft 2a. It should be noted that the fractionation effect shown in the fourth embodiment may also occur in this embodiment (with some extension). On the other hand, it should be noted that a concave shape may also be formed in the fourth embodiment.

  FIG. 7 is a schematic cross-sectional view of a sintered cooler 1e according to the sixth embodiment. Here, the discharge system is installed in the connecting beam 15 in the middle or above the shaft. The discharge system comprises an air duct (not shown) that can be easily coupled or arranged to the beam 15 and an outlet opening 23 for discharging air to the shaft. In the illustrated embodiment, the air duct is simply connected to the outside, i.e. at atmospheric pressure, and is drawn into the shaft by the same negative pressure that draws air through the inlet vanes 18. Thus, a further supply of cooling air is made in the upper part of the shaft. While the air rising from the inlet vanes 18 has already been heated to some extent, the cooling air supplied to the upper part of the shaft increases the air flow through the center or top, and new cooling air is added to this part. Will be introduced. Such a central outlet opening 23 can further provide cooling air for cooling the sintered body in the central region of the shaft.

  FIG. 7 shows a discharge system as a means for sucking air into the shaft 2a.

  Note that in FIGS. 4-7, only the tangential inflow vane 18 is visible due to the direction of the cutting plane through the shaft. Of course, air is sucked into the shaft even if it passes through the radial inflow blades, but this is not shown in these figures. The embodiment shown in FIGS. 4 to 7 can be changed to an embodiment without a tangential inflow blade and thus only a radial inflow blade.

1, 1b-1e: Sintering cooler 2, 2a: Shaft
2.1: Lower part
2.2: upper part 3, 3a: inner side wall 4, 4a: outer side wall
5: Charging opening
6: Release opening 7, 7a: Small room
8: Radial side wall
9: Radial inflow blade
10: Tangent side wall
11: Space
12: Lower opening
13: Opening
14: Support structure
15: Connection beam
16: Platform
17: Hammer
18: Tangential inflow blade
19: Deflection beam
20: Center
22: Scraper
23: Exit opening
100: Sintered body

Claims (11)

A sintered cooler (1, 1b-1e) for backflow operation having an annular shaft (2, 2a) containing a sintered body (100), wherein the shaft (2, 2a) is at least one upper device. An inlet opening (5) and at least one lower discharge opening (6),
In the lower part (2.1), the shaft (2, 2a) is divided into a plurality of small rooms (7, 7a) divided in the tangential direction,
Each chamber (7, 7a) was equipped with a radial vane (9) defining a radial inflow slit extending radially to allow the cooling gas to flow directly into the shaft (2, 2a). The radial extension length of the radial vane (9) having at least one side wall (8) and defining the radial inflow slit is 50% of the radial width of the small chamber (7, 7a) Bigger,
During operation, the sintered cooler (1, 1b-1e) is charged with the sintered body (100) through the upper charging opening (5) and into the lower discharge opening (6). 7a) sintering, characterized in that it moves downwards through the radial inflow slit and is sucked upwards through the shaft (2, 2a) cooler. As cooling gas can enter the space (11) between small room (7, 7a) adjacent the lower, the space (11) has a lower opening (12), No placement claim 1 Symbol Sinter cooler. Sintering according to claim 1 or 2 , wherein each chamber (7, 7a) has at least one side wall (10) with tangential vanes (18) defining tangential inflow slits extending in the tangential direction. cooler. The sintering cooler according to any one of claims 1 to 3 , wherein the radial width of the shaft (2, 2a) decreases downward. The sintering cooler according to any one of claims 1 to 4 , wherein the tangential width of each of the small chambers (7, 7a) decreases downward. The sintering cooler according to any one of claims 1 to 5 , further comprising at least one shape forming means for forming the upper shape of the sintered body (100) into a concave portion in a radial direction. The sintering cooler according to claim 6 , wherein the shape forming means (22) is adjustable. At least one dispersion element (21) for charging the sintered body mainly toward the radially inner wall (3, 3a) and the radially outer wall (4, 4a) of the shaft (2, 2a). The sintering cooler according to any one of claims 1 to 7 , comprising: The at least one discharge system (23) embedded in the sintered body (100) and sucking air into the shaft (2a) during operation is installed on top of the shaft (2a). The sintering cooler according to any one of 1 to 8 . The central deflection element (19) disposed in the shaft (2a) and deflecting the sintered body (100) radially inward and outward from a radially central region of the shaft (2a). The sintering cooler according to any one of 9 . A method of cooling a sintered body in a sintered cooler (1, 1b-1e) having an annular shaft (2, 2a) containing a sintered body (100), wherein the shaft (2, 2a) is at least Comprising one upper charging opening (5) and at least one lower discharge opening (6),
The lower side portion (2.1), the shaft (2, 2a) is divided into a plurality of small sections separated tangentially (7, 7a),
Their respective small sections (7, 7a), said shaft radial blades defining a radial inflow slits extending in a radial direction in order to flow directly into the cooling gas into the (2,2a) (9) The radial extension length of the radial vane (9) defining the radial inflow slit is at least one side wall (8) with a radial width of the small chamber (7, 7a) Greater than 50% of
The method
· Sintered body (100) allowed loading through the upper charging opening (5),
The sintered body (100) moves down through the small chambers (7, 7a) to the lower discharge opening (6);
A method characterized in that cooling gas is introduced directly from the radial inlet slit and sucked upward through the shaft (2, 2a).

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