A mixing granulator in a sintering mixer

Abstract

The utility model discloses a kind of mixing granulating devices in sintering mixer, it is related to sintering mixer equipment technical field. Including cylinder, water supply spraying mechanism and stirring mixing mechanism, wherein, cylinder includes cylinder body, feed end and discharge end, cylinder body is set along self axial rolling, and sintering raw material is filled in cylinder body, water supply spraying mechanism includes water supply main pipe, branch pipe and shower nozzle, water supply main pipe is inserted into cylinder body, water supply main pipe is connected with multiple branch pipes, the outer circumferential surface of each branch pipe is connected with multiple shower nozzles, stirring mixing mechanism includes crossbeam and stirring rod, crossbeam is inserted from the feed end of cylinder body and extends to discharge end, multiple stirring rods are set along the axial direction of crossbeam, and the end of multiple stirring rods away from crossbeam is inserted into sintering raw material. The utility model can better make raw material wet even, also can promote the flow of raw material in cylinder, avoid bonding cylinder inner wall.

Description

Technical Field

[0001] This utility model relates to the technical field of sintering mixer equipment, specifically a mixing and granulation device in a sintering mixer. Background Technology

[0002] The sintering mixer is one of the core pieces of equipment in the sintering production process of the iron and steel industry. It is mainly used to fully mix and wet the sintering raw materials (including iron concentrate powder, laterite nickel ore, return ore, flux, fuel, etc.) and granulate them. Through the synergistic effect of mechanical stirring and material conveying, the sintering raw materials are granulated and formed, creating favorable conditions for the subsequent sintering process.

[0003] Currently, the sintering plant's mixer uses a straight pipe spray system, where water is injected directly into the mixer through holes. When the water supply is turned on, water flows directly into the raw materials through these holes. During processing, because the water flows through these holes, prolonged operation leads to blockages at the bottom of the water pipe and frequent uneven wetting and mixing of the material, resulting in inconsistent moisture levels. This makes granulation impossible in the secondary mixer. Furthermore, the 3mm sieve clearance of the mixed material at the secondary mixer outlet is only 45%, and the 5mm sieve clearance is only 13%, indicating extremely poor material permeability. Additionally, the wetted sintering raw materials tend to accumulate, and without proper cleaning, they adhere to the inner wall of the mixing drum, increasing the difficulty of subsequent cleaning. Utility Model Content

[0004] The purpose of this invention is to provide a mixing and granulation device in a sintering mixer to solve the problems mentioned in the background art, such as insufficient mixing and wetting of sintering raw materials, which easily lead to accumulation and adhesion to the inner wall of the cylinder.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a mixing and granulation device in a sintering mixer, comprising a cylinder, a water supply spraying mechanism, and a stirring and mixing mechanism, wherein the cylinder includes a cylinder body and an inlet end and an outlet end disposed on both sides of the cylinder body, the cylinder body being rolled along its own axial direction, and the cylinder body being filled with sintering raw materials added from the inlet end; the water supply spraying mechanism includes a main water supply pipe, a branch water pipe, and spray heads, the main water supply pipe extending from the inlet end into the cylinder body, along a first direction... The main water supply pipe is equipped with multiple interconnected branch pipes. The ends of the branch pipes away from the main water supply pipe are all facing the sintering raw material and are all blocked. The outer circumferential surface of each branch pipe is connected to multiple spray heads. The first direction is the axial direction of the main water supply pipe. The mixing mechanism includes a crossbeam and stirring rods. The crossbeam extends from the feed end of the cylinder body to the discharge end. Multiple stirring rods are arranged along the axial direction of the crossbeam, and the ends of the stirring rods away from the crossbeam extend into the sintering raw material.

[0006] Based on the above technical features, this utility model connects a water distribution pipe to the original opening of the mixer, and adds multiple spray heads to the outer circumferential surface of each external water distribution pipe, so that the raw materials are more evenly moistened during the production process, which facilitates the subsequent granulation. At the same time, during the production process, the stirring and mixing mechanism can promote the flow of raw materials in the cylinder body and prevent the sintering raw materials that have been moistened by water from sticking to the inner wall of the cylinder body.

[0007] Preferably, in this technical solution, multiple water distribution pipes are arranged at equal intervals along a first direction and all extend along a second direction, which is perpendicular to the first direction. More preferably, the water distribution pipes are of the same length, and the length of the water distribution pipes is 30 cm to 50 cm.

[0008] Based on the above technical features, it can be ensured that the water pressure and resistance from the main water supply pipe to each branch pipe are roughly the same, thereby making the spray distance and coverage of the spray head roughly similar, and ultimately achieving uniform wetting of the sintering raw materials.

[0009] Preferably, in this technical solution, a threaded hole is provided on the main water supply pipe, and the branch water pipe is connected to the main water supply pipe through the threaded hole.

[0010] Based on the above technical features, the branch pipe is threaded to the main water supply pipe. If a branch pipe or sprinkler head needs to be replaced or cleaned, the threaded connection can be unscrewed to disassemble it without cutting the main water supply pipe.

[0011] Preferably, in this technical solution, a plurality of spray heads are arranged from top to bottom along the axial direction of the water distribution pipe and are evenly spaced along the outer circumference of the water distribution pipe. More preferably, four spray heads are connected to the outer circumferential surface of the water distribution pipe, with the same vertical spacing between each pair of adjacent spray heads along the axial direction of the water distribution pipe, and the included angle between each pair of adjacent spray heads is 90° when viewed along the axial direction of the water distribution pipe; or, five spray heads are connected to the outer circumferential surface of the water distribution pipe, with the same vertical spacing between each pair of adjacent spray heads along the axial direction of the water distribution pipe, and the included angle between each pair of adjacent spray heads is 72° when viewed along the axial direction of the water distribution pipe.

[0012] Based on the above technical features, the spray heads are distributed at fixed angles (72°, 90°) to ensure full coverage and uniform wetting of the raw materials.

[0013] In this technical solution, preferably, the stirring rod is shaped like a wolf's tooth, and the outer circumferential surface of the stirring rod is provided with a tooth-like structure.

[0014] Based on the above technical features, the dynamic staggered layout of the spiked rod's teeth forms a continuous tearing space, effectively preventing wet raw materials from adhering to the surface of the stirring rod. At the same time, the shearing force and splitting effect generated by the multi-angled tooth design can also ensure the uniform dispersion of the mixture.

[0015] In this technical solution, the spray head is preferably a spiral spray head.

[0016] Based on the above technical features, the spiral nozzle adopts a simple spiral body or spiral channel design. When the liquid passes through, it forms a strong vortex, which improves the anti-clogging performance. At the same time, the liquid rotates at a high speed in the spiral channel and breaks into droplets after being ejected from the nozzle, so as to uniformly cover and wet the sintering raw materials.

[0017] A sintering mixer includes a drive system and the aforementioned mixing and granulation device, wherein the drive system is used to drive the cylinder body to roll along its own axial direction. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the mixing and granulation device in an embodiment of the present invention;

[0019] Figure 2 As an embodiment of this utility model Figure 1 Enlarged schematic diagram of point I.

[0020] In the diagram: 1. Cylinder body; 11. Cylinder body; 12. Feeding end; 13. Discharge end; 2. Water supply spraying mechanism; 21. Water supply main pipe; 22. Water distribution pipe; 23. Spray head; 3. Mixing and stirring mechanism; 31. Crossbeam; 32. Stirring rod; 4. Sintering raw material. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] It should be noted that in the description of this utility model, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] Furthermore, it should be understood that, for ease of description, the dimensions of the various components shown in the accompanying drawings are not drawn to actual scale.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined or described in one figure, it will not need to be discussed or described in detail in the description of the subsequent figures.

[0025] Before understanding the technical solution of this utility model, it should be clear that the mixing and granulation device in this utility model can specifically refer to a primary mixer. Generally, the sintering raw material 4 is conveyed to the primary mixer by a belt for mixing, and water is added in the primary mixer. The mixture after mixing in the primary mixer is conveyed to the secondary mixer by a belt for further mixing and pelletizing.

[0026] like Figure 1 and Figure 2 As shown, this utility model provides a technical solution: a mixing and granulation device in a sintering mixer, comprising a cylinder, a water spraying mechanism, and a stirring and mixing mechanism.

[0027] The cylinder 1 includes a cylinder body 11 and a feed end 12 and a discharge end 13 disposed on both sides of the cylinder body 11. The cylinder body 11 is rolled along its own axial direction and is filled with sintering raw material 4 added from the feed end 12.

[0028] The water supply spraying mechanism 2 includes a main water supply pipe 21, branch water pipes 22, and spray heads 23. The main water supply pipe 21 extends from the feed end 12 into the cylinder body 11. Along the first direction, multiple interconnected branch water pipes 22 are provided on the main water supply pipe 21. The ends of the multiple branch water pipes 22 away from the main water supply pipe 21 are all facing the sintering raw material 4 and are all blocked. Multiple spray heads 23 are connected to the outer circumferential surface of each branch water pipe 22. The first direction mentioned above is the axial direction of the main water supply pipe 21.

[0029] The mixing mechanism 3 includes a crossbeam 31 and stirring rods 32. The crossbeam 31 extends from the feed end 12 of the cylinder body 11 to the discharge end 13. Multiple stirring rods 32 are arranged along the axial direction of the crossbeam 31, and the ends of the multiple stirring rods 32 away from the crossbeam 31 all extend into the sintering raw material 4. Preferably, a channel steel is connected below the crossbeam 31, and multiple stirring rods 32 are connected below the channel steel. The multiple stirring rods 32 are all inclined towards the feed end 12.

[0030] This invention connects a water distribution pipe 22 to the original opening in the mixer and installs multiple spray nozzles 23 on the outer circumference of each water distribution pipe 22. This ensures that the sintering raw material 4 receives moisture more evenly during the production process, resulting in better uniform wetting of the raw material and facilitating its subsequent entry into the secondary mixer for granulation. Simultaneously, during production, the stirring and mixing mechanism 3 promotes the flow of the sintering raw material 4 within the cylinder body 11, preventing the wetted raw material 4 from adhering to the inner wall of the cylinder body 11.

[0031] Specifically, the multiple water distribution pipes 22 are arranged at equal intervals along the first direction and extend along the second direction, which is perpendicular to the first direction. Preferably, the multiple water distribution pipes 22 are of the same length to ensure that the water pressure and resistance from the main water supply pipe 21 to each water distribution pipe 22 are approximately the same, thereby making the spray distance and coverage of the spray head 23 approximately similar, ultimately achieving uniform wetting of the sintering raw material 4. Furthermore, the length of the water distribution pipes 22 is selected to be 30CM to 50CM, and the length of the water distribution pipes 22 can be specifically selected as 30CM, 35CM, 40CM, 45CM, 50CM, or any value between the above adjacent values.

[0032] Furthermore, in one embodiment of the practical application of this utility model, the cross-sectional diameter of all the plurality of water distribution pipes 22 is 80 cm, and the distance between two adjacent water distribution pipes 22 is one meter. Of course, in other embodiments, water distribution pipes 22 with cross-sectional diameters of 60 cm, 70 cm, 90 cm, 100 cm, or other sizes can be selected, and the distance between two adjacent water distribution pipes 22 can be selected as 80 cm, 90 cm, 110 cm, 120 cm, etc., depending on the specific circumstances.

[0033] Furthermore, a threaded hole is opened on the main water supply pipe 21, and the branch water pipe 22 is connected to the main water supply pipe 21 through the threaded hole. When a branch water pipe 22 or a spray head 23 on a branch water pipe 22 needs to be replaced or cleaned, the threaded connection can be unscrewed to disassemble it without cutting the main water supply pipe 21.

[0034] like Figure 1 and Figure 2 As shown, multiple spray heads 23 are arranged from top to bottom along the axial direction of the water distribution pipe 22, and are evenly spaced along the outer circumference of the water distribution pipe 22.

[0035] Specifically, when four spray heads 23 are connected to the outer circumferential surface of the water distribution pipe 22, the vertical spacing between any two adjacent spray heads 23 is the same along the axial direction of the water distribution pipe (22), and the included angle between any two adjacent spray heads 23 is 90° when viewed along the axial direction of the water distribution pipe 22. When five spray heads 23 are connected to the outer circumferential surface of the water distribution pipe 22, the vertical spacing between any two adjacent spray heads 23 is the same along the axial direction of the water distribution pipe 22, and the included angle between any two adjacent spray heads 23 is 72° when viewed along the axial direction of the water distribution pipe 22. The spray heads 23 are distributed at equal intervals with fixed angles (72°, 90°) to ensure full coverage and uniform wetting of the raw materials.

[0036] like Figure 1 and Figure 2As shown, the stirring rod 32 is serrated, that is, the outer circumferential surface of the stirring rod 32 is provided with a toothed structure. The dynamic interlacing layout of its serrated rod forms a continuous tearing space, which effectively prevents the wetted sintering raw material 4 from adhering to the surface of the stirring rod 32. At the same time, the shearing force and splitting effect generated by the multi-angled tooth design can also ensure the uniform dispersion of the mixture.

[0037] Preferably, the spray head 23 is a DN25 spiral nozzle. The spiral nozzle adopts a simple spiral body or spiral channel design, which forms a strong vortex when the liquid passes through, improving the anti-clogging performance; at the same time, the liquid rotates at a high speed in the spiral channel and breaks into droplets after being ejected from the nozzle, so as to uniformly cover and wet the sintering raw material 4.

[0038] A sintering mixer includes a drive system and the aforementioned mixing and granulation device, wherein the drive system is used to drive the cylinder body 11 to roll along its own axial direction.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mixing and granulation device in a sintering mixer, characterized in that, The mixing and granulation device includes: The cylinder (1) includes a cylinder body (11) and a feed end (12) and a discharge end (13) disposed on both sides of the cylinder body (11). The cylinder body (11) is rolled along its own axis and is filled with sintering raw material (4) added from the feed end (12). Water supply spraying mechanism (2), the water supply spraying mechanism (2) includes a water supply main pipe (21), a water distribution pipe (22) and a spray head (23). The water supply main pipe (21) extends from the feed end (12) into the cylinder body (11). Along the first direction, the water supply main pipe (21) is provided with a plurality of interconnected water distribution pipes (22). The ends of the plurality of water distribution pipes (22) away from the water supply main pipe (21) are all facing the sintering raw material (4) and are all blocked. The outer circumferential surface of each water distribution pipe (22) is connected to a plurality of spray heads (23). The first direction is the axial direction of the water supply main pipe (21). The mixing mechanism (3) includes a crossbeam (31) and stirring rods (32). The crossbeam (31) extends from the feed end (12) of the cylinder body (11) to the discharge end (13). Multiple stirring rods (32) are arranged along the axial direction of the crossbeam (31), and the ends of the multiple stirring rods (32) away from the crossbeam (31) all extend into the sintering raw material (4).

2. The mixing and granulation apparatus according to claim 1, characterized in that, Multiple water distribution pipes (22) are arranged at equal intervals along a first direction and all extend along a second direction, which is perpendicular to the first direction.

3. The mixing and granulation apparatus according to claim 2, characterized in that, The lengths of the water distribution pipes (22) are the same, and the lengths of the water distribution pipes (22) are 30CM to 50CM.

4. The mixing and granulation apparatus according to claim 2, characterized in that, A threaded hole is provided on the main water supply pipe (21), and the branch water pipe (22) is connected to the main water supply pipe (21) through the threaded hole.

5. The mixing and granulation apparatus according to claim 1, characterized in that, Multiple spray heads (23) are arranged from top to bottom along the axial direction of the water distribution pipe (22) and are evenly spaced along the outer circumference of the water distribution pipe (22).

6. The mixing and granulation apparatus according to claim 5, characterized in that, Four spray heads (23) are connected to the outer circumferential surface of the water distribution pipe (22). Along the axial direction of the water distribution pipe (22), there is the same vertical spacing between each two adjacent spray heads (23), and when viewed along the axial direction of the water distribution pipe (22), the included angle between each two adjacent spray heads (23) is 90°.

7. The mixing and granulation apparatus according to claim 5, characterized in that, Five spray heads (23) are connected to the outer circumferential surface of the water distribution pipe (22). Along the axial direction of the water distribution pipe (22), there is the same vertical spacing between each two adjacent spray heads (23), and when viewed along the axial direction of the water distribution pipe (22), the included angle between each two adjacent spray heads (23) is 72°.

8. The mixing and granulation apparatus according to claim 1, characterized in that, The stirring rod (32) is serrated, and the outer circumferential surface of the stirring rod (32) is provided with a tooth-like structure.

9. The mixing and granulation apparatus according to claim 1, characterized in that, The spray head (23) is a spiral spray head.

10. A sintering mixer, characterized in that, The apparatus includes a drive system and a mixing and granulation device according to any one of claims 1 to 9, wherein the drive system is used to drive the cylinder body (11) to roll along its own axial direction.

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