TWI648509B - Sinter cooler - Google Patents

Abstract

The invention relates to a sinter cooler (1, 1b to 1e) for countercurrent operation, which has a circular shaft (2, 2a) for receiving sinter (100), the shaft (2, 2a) 2a) At least one upper filling opening (5) and at least one lower discharge opening (6). In order to provide a sinter cooler that achieves a highly homogeneous air flow while avoiding excessive wear, the present invention provides that in a lower part (2.1), the shaft (2, 2a) is divided into tangentially spaced A plurality of compartments (7, 7a); and ‧ each compartment (7, 7a) has at least one side wall (8) with radial inlet blades (9) extending radially for cooling air Introduced into the shaft (2, 2a); ‧ The sinter cooler (1, 1b to 1e) is constructed so that during operation, the sinter (100) is charged through the loading opening (5) and passes through these The compartment (7, 7a) moves down to the discharge opening (6) while cooling air passes through the radial inlet vanes (9) and is sucked upward through the shaft (2, 2a).

The invention also relates to a method for cooling sintered ore in this sintered ore cooling machine.

Description

Sinter Cooler

The invention relates to a sinter cooling machine for counter-current operation and a method for cooling sinter ore.

Sintering machines are usually used to agglomerate fine particles through a sintering process, in which a generally porous mass is formed from these particles while greatly maintaining their chemical properties. The product of the sintering process-sintered ore-can be used in the subsequent process. For example, in steel production, it is known to produce sintered ore from iron ore and other particles, which is thereafter used in blast furnaces. After the sintering process, the sintered ore initially having a high temperature of, for example, 600 ° C. to 700 ° C. is cooled to a temperature of, for example, 100 ° C. or the like in the sinter cooler.

In a common type of sinter cooler, the hot sinter ore is gravity fed into the shaft through the upper filling opening. At the lower end of the shaft, the sintered ore can be extracted, for example, by a scraper through the discharge opening. When the sinter ore descends through the shaft, a cooling gas (usually air) is guided through the shaft so that the sinter ore cools and the gas becomes hot. It is possible to use heated gas for the heat recovery process, for example, for recycling to sinter machinery and / or for generating steam that can drive a generator.

In addition to the cross-flow shaft-type cooler (where the cooling gas flows mainly horizontally), it is also known to use a counter-flow cooler, where the general movement of the cooling gas is through the sinter Vertically upward, and the sinter moves downward. These chillers are highly effective with respect to heat transfer between sintered ore and gas. The gas enters the lower part of the shaft and is drawn upwards to the top of the shaft, from which the gas can be directed to some heat recovery components. A common type of sinter cooler has a round shaft, in which the sinter ore is received and cooled. For example, the loading device of the chute is placed at a position above the shaft, and the shaft itself is rotatably assembled. During operation, the shaft rotates so that different parts of the shaft are sequentially filled with sintered ore by the charging device. The air inlet blades are arranged in the lower part of the inner wall and the outer wall of the shaft along the tangential direction. The airtight hood is placed on the top of the shaft and is connected to an air suction fan or the like.

Especially when a new sinter cooler is to be installed in an existing sinter mine factory, the main goal is to minimize the area occupied by the cooler, because there is typically quite limited available space in that area. Since the longer shutdown of the sinter mine plant is economically unacceptable, during the installation of the new sinter mine cooler, the existing sinter mine cooler usually must remain in operation.

Even if the area occupied by the cooling machine is reduced, the required air flow rate must remain unchanged. This is because it is a requirement of the cooling process. The amount of sintered ore to be cooled is multiplied by the specific air to sintered ore ratio (y tons of air z tons of sinter) definition. If a given air flow rate is guided by a smaller cooler, the air speed will therefore increase. This situation causes problems because the pressure drop in the sintered ore layer increases excessively as the air velocity increases. On the other hand, the operating cost in the sinter cooler greatly depends on the pressure drop through the sinter layer, because the pressure drop is proportional to the electrical consumption of the air suction fan. Therefore, in order to avoid an increase in operating costs due to the small footprint, the air velocity through the sintered ore layer and therefore the pressure drop should be kept as low as possible.

One option to achieve this is to increase the horizontal cross-section of the shaft. This option is accomplished by reducing the diameter of the inner shaft wall, that is, the shaft becomes wider while maintaining Its outer diameter. Although air velocity-and therefore pressure drop-is usually reduced by this measure, air distribution becomes a critical issue. In a common cooling machine of the type described, the air inlet blades are integrated in the inner shaft wall and the lower part of the outer shaft wall, so this is where cooling air enters the shaft. In a narrow shaft (at most 1 m width), one can assume that after a certain inlet section (eg, 1 m), air is distributed uniformly through the entire cross-section of the shaft. In a wide shaft (for example, 1.5m width or more), this homogeneous mixing takes a much longer route, because the distance from the air inlet blade to the center of the shaft is longer, and there are some boundary effects (such as , Preferential flow along the wall of the shaft). However, the uneven distribution of the cooling air leads to an inferior cooling process, that is, the sinter ore is not effectively cooled and / or the air is not optimally heated.

It has been proposed to solve this problem by providing air ducts which are arranged radially in the lower part of the shaft and communicate with additional tangential direction inlet blades in the central position between the inner wall and the outer wall. Although these configurations are used to improve the supply of cooling air into the inner region of the shaft, the additional components are relatively complicated and in addition suffer high wear and limited life. This is because the shaft member is generally tapered downward, which causes the speed of the sintered ore in the lower part to increase.

technical problem

Therefore, an object of the present invention is to provide a sinter cooler that achieves a highly homogeneous air flow while avoiding excessive wear. This goal is solved by the sinter cooler as claimed in item 1 and the method as claimed in item 12 of the patent.

The invention provides a sinter cooling machine for countercurrent operation. Countercurrent operation means that the cooling gas (usually air) usually flows relative to the movement of the sinter to be cooled. However, this situation can include smaller areas where the air flow is inclined or perpendicular to the movement of the sinter The movement of sinter. As explained above, this sinter cooling machine is part of an integrated sinter mining plant and is used to cool the hot sinter from a high temperature to a low temperature or at least a moderate temperature. Although the following generally refers to "air" and "air flow", it should be understood that other gases may be used and fall within the scope of the present invention.

The cooler has a circular shaft for receiving sintered ore, the shaft having at least one upper filling opening and at least one lower discharge opening. The shaft is circular, that is, it is generally ring-shaped (ring-shaped) and at least substantially symmetrical with respect to an axis. This shape may not correspond to a perfect ring, but to a ring with a polygonal cross section, which in this context is also considered a "circle". The circular shape of the shaft and the above-mentioned axis define the radial direction and the tangent direction mentioned below. Usually, the shaft member is rotatably assembled, wherein a part of the shaft member is placed at a charging device fed by a sintering machine. The charging device feeds the sintered ore into a part of the shaft, and the shaft-continuously or intermittently-rotates about its axis of symmetry to allow the sintered ore to be loaded to all parts. The hot sintered ore is fed through the at least one charging opening, and the cooled sintered ore is extracted (or simply scattered) at the discharge opening. As explained above, the upper part of the shaft can be covered by an airtight cover connected to an air suction device. In general, the cooler is adapted to generate negative pressure in or above the upper portion of the shaft.

According to the present invention, in a lower portion, the shaft member is divided into a plurality of compartments spaced tangentially. Along the tangential direction means in the tangential direction defined by the circular shape of the shaft. Although the shaft in an upper part (near the filling opening) preferably has a single continuous structure along the tangent (ie, circumference) direction, the lower part is divided into compartments. In other words, the shaft member branches down into a plurality of compartments spaced along the tangential direction. Therefore, the shape of the shaft is not continuous in this lower part, but the overall shape of the shaft is still circular. Such The cross-section of the compartment may be, for example, circular, polygonal, or other.

Each compartment has at least one side wall with radial inlet blades extending radially for introducing cooling air into the shaft. Since the compartments are separated, each compartment is bounded by side walls. The radial inlet blades are installed in at least one such side wall. Of course, in general, the blades are arranged so that the sintered ore cannot fall through the blades by gravity, that is, it guides the sintered ore to be held in the compartment. The blades extend radially and are preferably arranged in the radial direction. However, it may also have, for example, a curved shape that does not completely correspond to the radial direction, or it may be inclined with respect to the radial direction. In any case, one end of each blade is positioned radially outward from the other end.

The sinter cooling machine is constructed so that during operation, the sinter is charged through the loading opening and moves down through the compartments to the discharge opening, while cooling air passes through the radial inlet blades and up through the shaft Be inhaled. That is, the gravity of the sintered ore moves through the compartments, so the sintered ore is divided between the different compartments. The radial inlet blades allow an air flow to be directed into the sinter from a generally tangential direction. In addition, this air flow can directly act on one of the radially extending areas of the compartment-and the sinter in it. Although the previous method only considered inlet blades arranged in a tangential direction (this situation resulted in a radial non-homogeneous air flow), the solution of the invention results in a significantly improved homogeneity. Compared to designs that rely on additional air ducts in the lower part, the inventive solution is less complex and wear can be minimized.

In order to ensure a wide entry area for the cooling air, it is preferred that the radial inlet blades extend over 50% of the radial width of the compartment. It is further preferred that it extends over 70% or more than 90% of the radial width. In this embodiment, the side wall of the compartment is open for air introduction throughout most of the compartment, which causes the air flow to The radial direction is extremely homogeneous. It is even conceivable that the radial inlet blades are provided throughout the entire radial width.

Since the compartments are separated, there is a space between adjacent compartments for drawing cooling air into the individual compartments. Cooling air can enter this space, for example, from a radially inner and / or outer direction. In one embodiment, this space has an underside opening so that cooling air can enter the space from below. In fact, there is no need to provide a bottom plate or the like between the compartments, that is, the space between the compartments can be completely opened to the lower side, because the gravity-driven sinter cannot Enter the space.

In some embodiments, especially when the width of the individual compartments in the tangential direction is relatively large, the concept of the present invention can be improved, in that each compartment has at least one side wall with a tangential inlet extending in the tangential direction blade. These tangentially directed inlet blades (which are also known to the prior art from me) can be placed in one (radial) inner wall and / or outer wall of the compartment. The tangential blades are preferably arranged in the tangential direction, but may also have, for example, a curved shape that does not completely correspond to the tangential direction, or it may be inclined with respect to the tangential direction. Preferably, it extends over more than 50%, more than 70%, more than 90% of the tangential width of the compartment, or even the entire tangential width. It should be noted that if the radial blades and the tangential blades extend over the entire width of the compartment, these blades may be connected or even made from a single piece. In this case, there may be a "circumferential" blade that constitutes the tangential blades and the radial blades.

In an exemplary embodiment of the invention, one of the shaft members has a radial width that decreases downward. In other words, the wall of the shaft is inclined inwards. In this embodiment corresponding to the typical cooler design that has been explained above, the speed of the falling sinter increases towards the lower part and increases accordingly The risk of wear stress. In this situation, the inventive concept is particularly advantageous because it eliminates the need for additional air ducts or the like in the lower part of the shaft.

It is further preferred that the width of all lines in each compartment decreases downward. In other words, the individual side walls of the compartment are inclined inwards. On the other hand, this means that the width of the space between adjacent compartments increases downward and is relatively small at the top. Therefore, the side walls of the two adjacent compartments form a slightly roof-like structure, which helps to smoothly deflect the sintered ore falling from above into the individual compartments.

Depending on the design of the shaft, the cooling air may still have a tendency to move along the inner and outer walls, resulting in a heterogeneous air flow. One way to avoid this is to provide at least one profile forming member adapted to form an upper profile of the sintered ore to be concave in the radial direction. In other words, the height of this profile along the radial direction toward the inner and outer walls is larger than between the inner and outer walls. In short, the route from the sinter layer is shorter in the central area of the shaft, which means that the cooling air will have a tendency to move toward the center and away from the side walls. The profile forming member may be a scraper that acts on the sintered ore from above. In this context, the rotation of the shaft can be used, in that the profile forming member is similar to a plow-shaped device that forms a "groove" in the sinter ore to stand and work.

In this context, it is particularly preferred that the profile forming member is adjustable. For example, the vertical position of the forming member can be adjusted, or even the contour of the forming member itself can be changed. Usually, these adjustments can be done during a temporary shutdown of the workshop, but it is also conceivable to provide drive means to make these adjustments during operation.

It is well known that the sintered ore entering the cooler is composed of particles with different sizes. It is also known that particles of smaller size can be packed more densely, leaving less space For air to be used in between. Therefore, areas with larger particles leave more space for air to pass through, and will be a preferential path for the cooling air. This effect is utilized in another embodiment of the invention, wherein at least one distribution member is provided, which is adapted to fill the sintered ore mainly towards the radially inner and outer walls of the shaft. In these areas, the sinter ore will accumulate excessively and roll down. In this paper, larger particles roll farther than smaller particles, and gather in the central zone between the inner periphery and the outer periphery. Therefore, a "size gradient" is generated in the sintered ore layer, in which the smallest particles are on the inner and outer walls and the largest particles are in the center. Therefore, the cooling air will preferentially move away from the side walls and through the center. It should be noted that a similar effect can be produced by the profile forming member described above. For example, if the profile member initially produces a profile that exceeds the angle of repose of the sinter, this situation causes the sinter particles to roll down the slope.

It can also actively enhance the air flow in the central area of the shaft. According to another embodiment of the invention, at least one ventilation system is arranged in an upper part of the shaft member, so that during operation, the ventilation system is embedded in the sinter, the ventilation system is adapted to locally draw air Suck into the shaft. The ventilation system is located in one of the upper parts of the shaft, where the speed of the falling sinter is not as high as in the lower part, so the wear is significantly lower. In contrast to conventional suction members installed outside the shaft and above the sinter layer, the ventilation system is arranged such that during normal operation of the chiller, the ventilation system is embedded in the sinter. The ventilation system may include at least one air duct having at least one opening. The opening is usually placed in one (radial) central region of the shaft. If the ventilation system is adapted to draw air into the shaft, an additional source of cooling air is provided in the central zone. The cooling efficiency is enhanced.

Another option to improve the contact between the sinter ore and the cooling air is to redirect the sinter ore to move into the path of the air flow, even if it occurs mainly near the walls of the shafts The same is true for this air flow. This situation can be achieved by a central deflection element configured in the shaft and adapted to deflect the sinter ore radially inward and outward from the radial central region of the shaft. The deflection element may be a circular cross-bar arranged in the shaft along the circumference. Alternatively, the deflection element can be arranged lower in the compartments. In any case, the deflection elements may have inclined upper surfaces that form a roof-like structure for optimal deflection of the sinter. It should be noted that the lower edge of the deflection element may be above the lower edge of the compartment, that is, the deflection element does not have to extend all the way down to the edge of the compartment. If the flow of sintered ore is divided by the deflection element, redirected towards the walls of the shafts and flows together under the deflection element, a significant improvement in the effectiveness of countercurrent flow can be achieved.

The invention also provides a method for cooling sintered ore in a sintered ore cooler having a circular shaft for receiving sintered ore, the shaft having at least one upper filling opening and at least one lower discharge opening, wherein In the lower part, the shaft is divided into a plurality of compartments spaced tangentially; and each compartment has at least one side wall with radial inlet blades extending radially for cooling air Introduced into the shaft. The method includes: loading sintered ore through the loading opening; the sintered ore moves downward through the compartments to the discharge opening; and sucks cooling air upward through the radial inlet blades and through the shaft.

The preferred embodiment of the method of the invention corresponds to the preferred embodiment of the sinter cooler of the invention.

1. 1b to 1e‧‧‧sinter cooler

2. 2a‧‧‧Shaft

2.1‧‧‧Lower part

2.2‧‧‧Upper part

3. 3a‧‧‧Inner side wall

4. 4a‧‧‧External side wall

5‧‧‧ Filling opening

6‧‧‧Discharge opening

7, 7a‧‧‧ compartment

8‧‧‧Radial sidewall

9‧‧‧Radial inlet blade

10‧‧‧ Tangent side wall

11‧‧‧Space

12‧‧‧lower opening

13‧‧‧ opening

14‧‧‧Support structure

15‧‧‧Connect crossbar

16‧‧‧platform

17‧‧‧Stripper

18‧‧‧ Entry blade in tangential direction

19‧‧‧Center deflection element

20‧‧‧middle

22‧‧‧Contour forming member

23‧‧‧Ventilation system

100‧‧‧Sinter

The preferred embodiment of the present invention will now be described as an example with reference to the accompanying drawings. In the drawings: FIG. 1 is a perspective view of a shaft for a sinter cooling machine according to a first embodiment of the present invention; 2 is a cross-sectional side view of a sinter cooler with a shaft from Figure 1; 3 is a perspective view of a shaft for a sinter ore cooling machine according to a second embodiment of the present invention; FIG. 4 is a cross-sectional side view of a sinter ore cooling machine according to a third embodiment of the present invention; A cross-sectional side view of a sinter ore cooler according to a fourth embodiment of the invention; FIG. 6 is a cross-sectional side view of a sinter ore cooler according to a fifth embodiment of the invention; and FIG. 7 is Cross-sectional side view of a sinter cooler.

FIG. 1 shows a perspective view of a shaft 2 used in the sinter cooling machine 1 of the present invention in a simplified representation. The shaft 2 has a generally circular or ring shape, which has an inner side wall 3 and an outer side wall 4. The shaft 2 has an upper filling opening 5 which extends circumferentially between the upper edge of the inner side wall 3 and the outer side wall 4. A part of the outer side wall 4 has been removed in FIG. 1 to show the inside of the shaft 2. In the lower part 2.1, the shaft member 2 branches into a plurality of compartments 7, each of which has a discharge opening 6 at the lower end. During operation, the sintered ore 100 is loaded into the shaft 2 through the loading opening 5, is lowered by gravity, and moves through the compartment 7 to the respective discharge opening 6. The rotation of the shaft 2 about its axis of symmetry ensures a uniform distribution of the sintered ore 100.

It can be seen that each compartment 7 is delimited by a radially arranged side wall 8 facing the adjacent compartment 7. The side walls 8 of adjacent compartments 7 are inclined inwards so that they form a roof-like structure. A plurality of radial inlet blades 9 are arranged in each of the side walls 8. It extends over approximately 80% of the radial width of the compartment 7. During operation, a negative pressure is applied above the shaft upper part 2.2, thereby drawing air upward through the radial inlet vanes 9 and through the compartment 7 and the shaft upper part 2.2. Therefore, the air moves in a counter-current manner with respect to the descending sinter 100. In the illustrated embodiment, the side wall 10 of the compartment 7 in the tangential direction is completely closed, and there is no inlet blade. It has been found that providing a combination of radial blades 9 and dividing the shaft 2 into compartments 7 ensures a charge that causes effective cooling of the sinter 100 Homogenous air flow. In the embodiment shown, the shaft 2 is divided into 12 compartments 7; of course, this number can be different, in particular significantly higher, such as up to 20 or up to 50. In the illustrated embodiment, the space 11 between adjacent compartments 7 has a lower opening 12 and radial inner and outer openings 13. These openings 12, 13 may also form a single opening. However, it should be noted that if at least one of the lower opening 12 or the inner and outer openings 13 is missing, the design also works.

FIG. 2 shows a cross-sectional side view of a part of the sinter cooler 1 with the shaft 2 from FIG. 1. It can be seen more clearly in this representation that the radial width of the shaft member 2 decreases downward. For structural stability, the outer side wall 3 is connected to the support structure 14 and the outer side wall 3 and the inner side wall 4 are connected by three horizontally arranged connecting bars 15. During operation, the sintering plant's loading device (not shown) is positioned above the loading opening 5 of the shaft 2 and lowers the sintered ore 100 onto the shaft 2, wherein the sintered ore 100 is lowered by gravity, such as Already explained. An airtight hood connected to the air suction system is placed above the upper part 2.2 of the shaft 2. However, these elements are not shown in FIG. 2. The shaft is assembled on the rotating platform 16, and the rotating platform 16 slowly rotates on a circular track, so that the static loading device is sequentially placed above different sections of the shaft 2. At the lower discharge opening 6, a static stripper 17 is provided, which helps to remove the cooled sintered ore 100 from the shaft 2. As can be seen in this more detailed view, each compartment contains four inlet vanes 9 on either side, which extend radially about 80% of the width of the compartment 7. Of course, this situation is only an example, and a higher or lower number of blades 9 that extend substantially far can also be used.

Fig. 3 is a perspective view showing a second embodiment of the shaft member 2a according to the present invention. It is very similar to the shaft 2 shown in FIGS. 1 and 2 and also has a compartment 7a with radial inlet vanes 9. However, the shaft 2a additionally includes a tangential direction inlet blade 18 disposed on each of the compartments. In this embodiment, the radial inlet blade 9 and the tangential inlet blade 18 It extends over approximately 80% of the respective width of the compartment 7a. However, it is conceivable to provide radial inlet blades and tangential inlet blades throughout the entire width so that it actually forms a single piece of circumferential inlet blades. Providing the inlet blade 18 in the tangential direction increases the air introduction area, and thus helps reduce the air flow velocity at the inlet. In addition, the homogeneity of the air flow can be further improved, especially in the lower portion of the shaft member 2a having the compartment 7a.

FIG. 4 shows a schematic cross-sectional view of the sinter ore cooler 1b according to the third embodiment. This embodiment uses the shaft member 2a from FIG. 3, which has inner and outer tangential inlet blades 18. In order to further enhance the effectiveness of the reverse flow even if the air has a tendency to move along the inner side wall 3a and the outer side wall 4a of the shaft member 2a, a central deflection element 19, such as a deflection bar, may be placed on the shaft member 2a along To) in the central area. The central deflection element 19 is placed in the middle or lower part of the shaft 2a, but slightly above the inlet blade 18 in the tangential direction, for example, immediately above the compartment 7a. Alternatively, a deflection rail can be installed in each compartment 7a. It can be seen in FIG. 4 that the central deflection element 19 does not extend all the way down along the shaft 2a, that is, it does not completely divide the lower part. Specifically, its function is to divide the descending sinter 100 into two streams (indicated by bold black arrows), which are forced to be closer to the inner and outer walls, where they are moving upward with air (by bold white arrows) Instructed) meet. At some point below the central deflection element 19, the two streams can be combined again.

FIG. 5 shows a schematic cross-sectional view of the sinter ore cooler 1c according to the fourth embodiment, which also uses the shaft member 2a from FIG. 3. Here, the sintered ore 100 is not uniformly charged in the radial direction, but preferentially faces the inner side wall 3a and the outer side wall 4a. This situation is simply achieved by the roof-shaped distribution element 21 placed at the end of the chute (not shown) of the loading device. The sinter 100 is piled up and starts to roll or slide down the slope toward the middle 20 of the shaft 2a move. This process results in a certain degree of isolation because larger particles tend to move farther than small particles. However, the larger particles leave more space for air to flow through, so the middle 20 of the shaft 2a is a better flow path. Therefore, the cooling air (indicated by the bold white arrow) is directed away from the inner side wall 3a and the outer side wall 4a to the middle 20 of the shaft 2a.

Fig. 6 shows a schematic cross-sectional view of a sinter cooler 1d according to a fifth embodiment. In this embodiment, the sintered ore 100 is distributed over the entire radial width of the shaft 2a, but the profile forming member 22, such as a doctor blade, acts on the uppermost layer of the sintered ore 100 to produce a concave profile. As the shaft member 2a rotates, the contour forming member 22 is like a plow-shaped implement to stand still and work. The concave profile means that the total height of the sinter layer in the middle of the shaft member is smaller than toward the inner side wall 3a and the outer side wall 4a. Also, the distance from the inlet blade 18 in the tangential direction to the center of the concave profile is reduced relative to the distance to the inner and outer edges of the profile. Therefore, the cooling air (indicated by the bold white arrow) is redirected at least partially from the inner side wall 3a and the outer side wall 4a to the middle of the shaft 2a. It should be noted that, to a certain extent, the isolation effect described for the fourth embodiment may also occur in this embodiment. On the other hand, it should be noted that also in the fourth embodiment, a concave profile is formed.

7 shows a schematic cross-sectional view of the sinter ore cooler 1e according to the sixth embodiment. Here, the ventilation system is installed in the connecting crossbar 15 in the central or upper area of the shaft. The ventilation system includes: an air duct (not shown), which can be easily integrated into the cross bar 15 or assembled to the cross bar 15; and a ventilation system 23, such as an outlet opening, which is used to release air into the shaft. In the illustrated embodiment, the air duct is simply connected to the outside, that is, to the atmospheric pressure, so that the air is drawn into the shaft by the same negative pressure that the air is drawn through the inlet blade 18. An additional supply for cooling air is therefore provided in the upper part of the shaft, which on the one hand increases the air flow through the central part or the upper part, and additionally introduces fresh cooling air into this part, while The air rising from the inlet blade 18 has become warm to some extent. This ventilation system 23 allows to provide additional cooling air for cooling the sintered ore in the central area of the shaft.

Fig. 7 shows the ventilation system as a component for drawing air into the shaft 2a.

It should be noted that in FIGS. 4 to 7, due to the orientation of the cut through the shaft, only the tangential direction inlet blade 18 is visible. Of course, air is also drawn into the shaft through radial inlet vanes (which are not visible on these figures). The embodiments shown in FIGS. 4 to 7 are all valid for the embodiments without tangential direction inlet blades (that is, only having radial inlet blades).

Claims (12)

A sinter cooling machine (1, 1b to 1e) for countercurrent operation, which has a circular ring-shaped shaft (2, 2a) for receiving sinter (100), the shaft (2, 2a) It has at least one upper filling opening (5) and at least one lower discharge opening (6), wherein in a lower portion (2.1), the shaft (2, 2a) is divided into a plurality of compartments separated in a tangential direction (7, 7a); and each compartment (7, 7a) has at least one side wall (8) with radial inlet vanes (9) extending radially for introducing cooling gas to the shaft ( 2. 2a); the upper part of the shaft is covered by a gas-tight cover connected to a gas suction device; the sinter cooler (1, 1b to 1e) is constructed so that during operation, the sinter ( 100) is filled through the filling opening (5) and moves down through the compartments (7, 7a) to the discharge opening (6), while the cooling gas is passed by the gas suction device through the radial inlet blades ( 9) And is sucked upward through the shaft (2, 2a). The sinter cooler as claimed in item 1 of the patent scope is characterized in that the radial inlet blades (9) extend over 50% of the radial width of the compartment (7, 7a). For example, the sinter cooler of item 1 or item 2 of the patent application is characterized in that a space (11) between adjacent compartments (7, 7a) has a lower opening (12), so that the cooling gas can Enter the space below (11). The sinter cooler as claimed in item 1 or 2 of the patent application is characterized in that each compartment (7, 7a) has at least one side wall (10) with a tangential inlet blade (18) extending in the tangential direction ). For example, the sinter cooler of the first or second patent application is characterized in that the radial width of one of the shaft members (2, 2a) decreases downward. For example, the sinter cooler of patent application item 1 or item 2 is characterized in that the width of each compartment (7, 7a) in the direction of the line decreases downward. The sinter cooler as claimed in item 1 or 2 of the patent scope is characterized by at least one profile forming member (22) which is adapted to form an upper profile of the sinter (100) in the radial direction The upper surface is concave. For example, the sinter cooler of claim 7 is characterized in that the profile forming member (22) is adjustable. The sinter cooler as claimed in item 1 or item 2 of the patent scope is characterized by at least one distribution member (21) which is adapted to mainly face one of the radial inner side walls (3 of the shaft member (2, 2a) , 3a) and a radially outer side wall (4, 4a) are filled with the sintered ore. The sinter cooler as claimed in item 1 or item 2 of the patent scope is characterized in that at least one ventilation system (23) is arranged in an upper part of the shaft (2a) so that during operation, the ventilation system is embedded In the sinter (100), the ventilation system (23) is adapted to draw air into the shaft (2a). For example, the sinter cooler of the first or second patent application is characterized by a central deflection element (19), which is arranged in the shaft (2a) and is adjusted so that the sinter (100) is removed from the One of the radial central regions of the shaft member (2a) is deflected radially inwards and outwards. A method for cooling sintered ore (100) in a sintered ore cooler (1, 1b to 1e) having a circular annular shaft (2, 2a) for receiving sintered ore (100), the The shaft (2, 2a) has at least one upper filling opening (5) and at least one lower discharge opening (6), wherein in a lower portion (2.1), the shaft (2, 2a) is divided into tangential directions A plurality of compartments (7, 7a) separated; and each compartment (7, 7a) has at least one side wall (8) with radial inlet blades (9) extending radially for cooling Gas is introduced into the shaft (2, 2a), and an upper part of the shaft is covered by a gas-tight cover connected to a gas suction device; the method includes: loading sintered ore through the loading opening (5) ( 100), the sinter (100) moves down through the compartments (7, 7a) to the discharge opening (6), by means of the gas suction device through the radial inlet blades (9) and through The shaft (2, 2a) sucks the cooling gas upward.