A kind of material lifting plate and drying kiln roller

Abstract

This utility model relates to the field of laterite nickel ore processing technology, and discloses a lifting plate and a drying kiln drum, including: fixed rods, support plates, comb teeth, and a first dispersing chain; two fixed rods extend along a first direction and are arranged opposite each other along a second direction, at least two support plates are spaced apart between the two fixed rods, and multiple comb teeth are spaced apart between adjacent support plates, with each comb tooth having two fixed rods connected to its two ends respectively, thereby dividing the space between adjacent support plates into multiple rectangular material channels. A first dispersing chain is provided in each material channel, with two fixed rods connected to its two ends respectively. The comb teeth are arc-shaped, with the inner arc side of the comb teeth being the receiving side and the outer arc side being the discharge side. By setting the first dispersing chain, the laterite nickel ore can be effectively dispersed. Simultaneously, the arc-shaped design of the comb teeth, with its receiving side concave towards the discharge side, further helps the laterite nickel ore to quickly pass through the material channel and prevents it from sticking to the comb teeth.

Description

Technical Field

[0001] This utility model relates to the field of laterite nickel ore processing technology, specifically to a lifting plate and a drying kiln drum. Background Technology

[0002] A drying kiln drum is a dryer used for drying large quantities of materials, widely used in the pre-iron processing of the steel industry. It consists of a drying kiln and a drum. The drum rotates in a co-current manner. Its working process involves lifting and dispersing the material to be dried to facilitate heat absorption, and then pushing it backward under the action of spiral lifting plates. Due to the inclined placement of the drum, the material flows to the rear end under the action of gravity and rotation. At the same time, the material is repeatedly lifted by the lifting plates, and the chain removes any adhering material. The material is carried by inertia to the upper part of the drum and then continuously scattered down, forming a uniform curtain of material inside the drum. This allows for sufficient heat exchange with the hot airflow inside the drum. Due to the repeated scattering of the material, the moisture it contains is gradually dried, thus achieving the drying purpose.

[0003] Under sufficient heat source conditions, the structure and quantity of the lifting plates and chains inside the drum are closely related to the drying capacity of the kiln. The lifting plates and chains, located inside the drum, function to lift and break up adhering materials, allowing them to form a curtain that fully contacts the heat of the flue gas passing through the drum, facilitating heat exchange and smooth discharge from the drum. However, existing lifting plates are diamond-shaped grids, which cannot accommodate small chains. When the material supply is increased, the diamond-shaped grids of the lifting plates easily become clogged. Over time, the material inside the drum cannot form a curtain, resulting in low drying efficiency and limiting the drying capacity of the kiln. Utility Model Content

[0004] The purpose of this utility model is to provide a lifting plate to solve the problem in the prior art where small chains cannot be set in the grid of the existing lifting plate, which easily leads to clogging of the lifting plate.

[0005] Another objective of this invention is to provide a drying kiln drum with the aforementioned lifting plates, which can solve the problem of severe adhesion inside the drum.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A material lifting plate includes: fixed rods, support plates, comb teeth, and a first dispersing chain; two fixed rods extend along a first direction and are arranged opposite each other along a second direction; at least two support plates are spaced apart between the two fixed rods; multiple comb teeth are spaced apart between adjacent support plates; and each comb tooth is connected to two fixed rods at both ends to divide the space between adjacent support plates into multiple rectangular material channels; a first dispersing chain is provided in each material channel, and each first dispersing chain is connected to two fixed rods at both ends; the comb teeth are arc-shaped, with the inner arc side of the comb teeth being the receiving side and the outer arc side being the discharging side; the first direction is perpendicular to the second direction. By setting the first dispersing chain, impacts and collisions can occur between adjacent comb teeth, helping to disperse lateritic nickel ore and reduce the adhesion of lateritic nickel ore to the comb teeth. By setting the comb teeth in an arc shape, with the inner arc side being the receiving side and the outer arc side being the discharging side, it can help laterite nickel ore pass through the material channel quickly and reduce adhesion.

[0008] Furthermore, the length of the first dispersing chain is greater than or equal to the length of the comb teeth. This arrangement appropriately increases the swing range of the first dispersing chain, allowing it to impact the comb teeth on both sides, thus reducing the adhesion of laterite nickel ore to the comb teeth.

[0009] Furthermore, the spacing between two adjacent comb teeth is 40–90 mm. Increasing the spacing between the comb teeth facilitates the passage of lateritic nickel ore and reduces adhesion.

[0010] Furthermore, the support plate includes a first plane and a second plane arranged opposite to each other along a first direction, a third plane and a fourth plane arranged opposite to each other along a second direction, and a fifth plane and a sixth plane arranged opposite to each other along a third direction. The first plane and the second plane are used to connect the fixing rod, the third plane is used to connect the inner wall of the drum, the fifth plane is the material receiving surface, and the sixth plane is the material discharging surface. The first direction, the second direction, and the third direction are perpendicular to each other.

[0011] Furthermore, the fifth plane has an arc surface concave to the sixth plane. Through the above arrangement, the receiving surface of the support plate has a certain curvature. During the rotation of the lifting plate with the drum, the arc-shaped receiving surface can reduce the contact pressure with the laterite nickel ore, quickly penetrate into the laterite nickel ore, facilitate stirring, and prevent the laterite nickel ore from accumulating on the receiving surface.

[0012] Furthermore, the length of the third plane along the third direction is greater than the length of the fourth plane along the second direction. This arrangement increases the contact area between the third plane and the inner wall of the roller, improving its installation stability.

[0013] A drying kiln drum includes a drum, a second dispersing chain, and the aforementioned lifting plates. The drum extends axially along a first direction, with a first end serving as the feed end and a second end as the discharge end. Multiple lifting plates are evenly distributed along the first direction on the inner wall of the drum, forming lifting plate groups. These lifting plate groups are evenly distributed circumferentially along the drum. The second dispersing chain is arranged along the first direction on the inner wall of the drum, positioned between adjacent lifting plate groups. The lifting plates function to lift and agitate materials within the drum, while the second dispersing chain disperses the material, preventing agglomeration and vibrating to clean the drum wall and lifting plates, thus preventing the adhesion of laterite nickel ore. The combined action of the lifting plates and the second dispersing chain effectively prevents the adhesion, wall formation, and agglomeration of laterite nickel ore, forming a uniform curtain and significantly improving the drying kiln's capacity.

[0014] Furthermore, the first end of the second dispersing chain is close to the feed end of the drum, and the second end of the second dispersing chain is close to the discharge end of the drum. The second dispersing chain has multiple connection points with the inner wall of the drum, so that the second dispersing chain is arranged in a wave shape on the inner wall of the drum. By setting the connection points, the second dispersing chain is divided into several small segments along the first direction. Each small segment of the second dispersing chain can play the role of dispersing and cleaning the drum wall and the lifting plate, while also preventing adjacent second dispersing chains from getting tangled together.

[0015] Furthermore, the distance between two adjacent connection points of the second dispersing chain is 60-80 cm, and the weight of the entire second dispersing chain is 450-500 kg. By increasing the weight of the second dispersing chain, the swing amplitude and striking force of the second dispersing chain can be increased, effectively dispersing the material while significantly reducing the adhesion of laterite nickel ore to the inner wall of the drum. It can also help clean the material on the lifting plates, significantly improving the drying kiln's capacity.

[0016] Furthermore, the spacing between two adjacent lifting plates arranged along the circumference of the drum is greater than 400 mm. By increasing the gap between the lifting plates, the accumulation of laterite nickel ore inside the drum is reduced, thereby increasing the area of ​​the curtain formed.

[0017] This invention has the following advantages over the prior art:

[0018] 1. The lifting plate of this utility model includes two fixed rods extending along a first direction and arranged opposite each other along a second direction. At least two support plates are spaced apart between the two fixed rods to support them. Multiple comb teeth are arranged at intervals between adjacent support plates to divide the area between adjacent support plates into multiple rectangular material channels. A first dispersing chain is installed in each material channel. When highly viscous lateritic nickel ore passes through the material channel, the impact of the first dispersing chain effectively disperses the ore, allowing it to pass through the material channel quickly. Simultaneously, the comb teeth are designed in an arc shape, with the receiving side concave towards the discharge side, further helping the lateritic nickel ore to pass through the material channel quickly and preventing it from sticking to the comb teeth. Through the above-mentioned design, the lifting plate of this utility model is less prone to clogging, improving the drying capacity of the drying kiln.

[0019] 2. In the drying kiln drum of this utility model, lifting plates are evenly arranged along a first direction inside the drum to form lifting plate groups, and the lifting plate groups are evenly distributed along the circumference of the drum. A second dispersing chain is set between adjacent lifting plate groups. The lifting plates play the role of lifting and stirring, while the second dispersing chain is used to disperse the material, prevent agglomeration, and vibrate and clean the drum wall and lifting plates, reducing the adhesion of laterite nickel ore. Under the combined action of the lifting plates and the second dispersing chain, the adhesion, agglomeration, and clumping of laterite nickel ore are effectively avoided, forming a uniform curtain and significantly improving the drying kiln capacity. Attached Figure Description

[0020] Figure 1 This is a front view of the lifting plate in an embodiment of the present utility model;

[0021] Figure 2 for Figure 1 Cross-sectional view at point AA;

[0022] Figure 3 This is a cross-sectional view of the material lifting plates installed inside the drying kiln drum in an embodiment of the present utility model.

[0023] Figure 4 This is a schematic diagram of the installation of a second disintegrating chain inside the drying kiln drum in an embodiment of the present invention;

[0024] In the diagram: 1. Lifting plate; 2. Fixing rod; 3. Support plate; 301. First plane; 302. Third plane; 303. Fourth plane; 304. Fifth plane; 305. Sixth plane; 4. Comb teeth; 5. First dispersing chain; 6. Roller; 7. Second dispersing chain; 8. Connection point; X, First direction; Z, Second direction. Detailed Implementation

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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 further discussed and described in the description of the subsequent figures.

[0029] Example:

[0030] refer to Figure 1 and Figure 2 A lifting plate 1 includes: a fixing rod 2, a support plate 3, comb teeth 4, and a first dispersing chain 5; both fixing rods 2 are along a first direction ( Figure 1 Extending in the middle X direction, and along the second direction ( Figure 1 In the Z-direction, at least two support plates 3 are spaced apart between the two fixed rods 2, and multiple comb teeth 4 are spaced apart between two adjacent support plates 3. Each comb tooth 4 is connected to two fixed rods 2 at both ends to divide the space between two adjacent support plates 3 into multiple rectangular material channels. Each material channel is provided with a first dispersing chain 5, and each first dispersing chain 5 is connected to two fixed rods 2 at both ends. The comb teeth 4 are arc-shaped, with the inner arc side of the comb teeth 4 being the material receiving side and the outer arc side of the comb teeth 4 being the material discharging side. The first direction is perpendicular to the second direction.

[0031] Traditional lifting plates have a diamond-shaped mesh internal material channel with small gaps. Lateritic nickel ore is highly viscous and moist, making the lifting plates prone to blockage when the feed is increased. This causes severe adhesion within the cylinder, preventing the material from forming a curtain inside the drum, resulting in low drying efficiency and limiting the drying capacity of the kiln. Therefore, in this embodiment, two fixed rods are installed along a first direction, with at least two support plates spaced apart between them. Multiple comb teeth are spaced apart between adjacent support plates to divide the space between adjacent support plates into multiple rectangular material channels. This arrangement changes the shape of the material channels into rectangles. A first dispersing chain is then placed between adjacent comb teeth. This chain strikes and impacts the comb teeth, helping to disperse the lateritic nickel ore and reduce its adhesion to the comb teeth. By designing the comb teeth in an arc shape, with the inner arc side being the receiving side and the outer arc side the discharge side, the material is further dispersed, allowing the lateritic nickel ore to pass quickly through the material channels and reducing adhesion. Even with increased material supply, the lifting plate in this embodiment can effectively reduce adhesion and form a uniform curtain inside the cylinder.

[0032] Support plates 3 are used to support and connect two fixed rods 2. There must be at least two support plates 3. The number of support plates 3 is determined based on actual conditions (considering the length of the drying kiln drum along the first direction, the number of lifting plates installed inside the drum along the first direction, the length of the lifting plates themselves along the first direction, the dimensions of the material channel, etc.), for example, two, three, or five plates. (Reference) Figure 1 In this embodiment, there are four support plates 3. In this embodiment, the length of the first dispersing chain 5 is greater than or equal to the length of the comb teeth 4. Through the above arrangement, the swing range of the first dispersing chain 5 can be appropriately increased, so that it can hit the comb teeth on both sides, reducing the adhesion of laterite nickel ore to the comb teeth. At the same time, it avoids the first dispersing chain 5 from being too long, preventing two adjacent first dispersing chains 5 from getting tangled together.

[0033] In this embodiment, the interval between two adjacent comb teeth 4 is 40-90mm, such as 40mm, 45mm, 50mm, 60mm, 70mm, 80mm, 90mm, etc., preferably 70mm. Increasing the interval between two adjacent comb teeth 4, in conjunction with the first dispersing chain 5, disperses the laterite nickel ore, allowing it to pass through the material channel quickly, which can increase the material supply while making it less likely to block the material channel.

[0034] Specifically, refer to Figure 2The support plate 3 includes a first plane 301 and a second plane arranged opposite each other along a first direction, a third plane 302 and a fourth plane 303 arranged opposite each other along a second direction, and a fifth plane 304 and a sixth plane 305 arranged opposite each other along a third direction. The first plane 301 and the second plane are used to connect the fixing rod 2, the third plane 302 is used to connect the inner wall of the roller 6, the fifth plane 304 is the receiving surface, and the sixth plane 305 is the discharging surface. Figure 1 (Central X direction), Second direction ( Figure 1 The Z-direction and the third direction (the third direction is the Y-direction, not shown in the figure) are perpendicular to each other. The fifth plane 304 has an arc surface concave towards the sixth plane 305. This design gives the receiving surface of the support plate 3 a certain curvature. As the lifting plate 1 rotates with the drum 6, the arc-shaped receiving surface reduces the contact pressure with the laterite nickel ore, allowing it to quickly penetrate the laterite nickel ore, facilitating stirring and preventing the laterite nickel ore from accumulating on the receiving surface. The length of the third plane 302 along the third direction is greater than the length of the fourth plane 303 along the second direction. By increasing the length of the third plane 302, the contact area between the third plane 302 and the inner wall of the drum 6 is increased, improving its installation stability. In actual use, the third plane 302 is welded to the inner wall of the drum 6. Welding reduces the installation gap between the lifting plate 1 and the drum 6, preventing material blockage and improving the installation stability of the lifting plate 1.

[0035] refer to Figure 3 and Figure 4 This embodiment also provides a drying kiln drum, including a drum 6, a second dispersing chain 7, and the aforementioned lifting plates 1. The drum 6 extends axially along a first direction, with its first end serving as the feed end and its second end as the discharge end. Multiple lifting plates 1 are evenly distributed along the first direction on the inner wall of the drum 6 to form lifting plate groups. These lifting plate groups are evenly distributed circumferentially along the drum 6. The second dispersing chain 7 is arranged along the first direction on the inner wall of the drum 6, located between adjacent lifting plate groups. During drum rotation, the lifting plates 1 function to stir, vibrate, and prevent material adhesion. The second dispersing chain disperses the material, prevents agglomeration, and cleans the drum wall and lifting plates, preventing laterite nickel ore from adhering to the inner wall of the drum and the lifting plates. Under the combined action of the lifting plates and the second dispersing chain, the adhesion, agglomeration, and clumping of laterite nickel ore are effectively prevented, forming a uniform curtain and significantly improving the drying kiln's capacity.

[0036] Specifically, refer to Figure 4 ( Figure 4(Diagram showing the arrangement of the second chain) The first end of the second dispersing chain 7 is close to the feed end of the drum 6, and the second end of the second dispersing chain 7 is close to the discharge end of the drum 6. The second dispersing chain 7 has multiple connection points 8 with the inner wall of the drum 6, so that the second dispersing chain 7 is arranged in a wave shape on the inner wall of the drum 6. By setting the connection points 8, each second dispersing chain 7 is divided into several small segments along the first direction. Each small segment of the second dispersing chain 7 can play the role of dispersing and cleaning, improving efficiency while preventing adjacent second dispersing chains 7 from getting tangled together. The connection points 8 can be welding points fixed to the inner wall of the drum 6 for welding to the second dispersing chain 7, or they can be collars fixed to the inner wall of the drum 6. The collars have openable openings for connecting the second dispersing chains 7. The collars are commonly used components.

[0037] In this embodiment, the distance between two adjacent connection points of the second dispersing chain 7 is 60-80cm, such as 60cm, 65cm, 70cm, 80cm, etc., preferably 70cm. The weight of the second dispersing chain is 450-500kg, and the length is 22-25m. The weight of the chain before the improvement was about 320-350kg. By increasing the weight of the second dispersing chain 7 (i.e., thickening the chain), the swing amplitude and striking force of the second dispersing chain 7 can be increased, effectively dispersing the material while significantly reducing the adhesion of laterite nickel ore to the inner wall of the drum and the lifting plates, thus significantly improving the drying kiln's capacity.

[0038] Before the improvement, the interval between two adjacent lifting plates arranged along the circumference of the drum was 400mm. In this embodiment, the interval between the lifting plates 1 is increased. Since the lifting plates 1 are arranged radially along the drum 6, the bottom interval between two adjacent lifting plates 1 is 900-1100mm, for example, 900mm, 920mm, 950mm, 960mm, 1000mm, 1007mm, 1020mm, 1050mm, 1060mm, 1100mm, etc., and the top interval is 720-760mm, for example, 720mm, 730mm, 740mm, 747mm, 755mm, 760mm, etc. The specific values ​​are determined according to the drum diameter and the number of lifting plates. For example, in this embodiment, the drum diameter is 3500 mm and the number of lifting plates is 11. The bottom spacing between two adjacent lifting plates distributed along the circumference is 1007 mm and the top spacing is 747 mm. By increasing the gap between the lifting plates, the accumulation of laterite nickel ore in the drum is reduced, the curtain area is increased, and a suitable swing interval is provided for the thickened second dispersing chain 7.

[0039] In this embodiment, the drying kiln drum increases its drying capacity from 125 tons / hour to 135 tons / hour by changing the shape of the material channel of the lifting plate 1, setting the first dispersing chain 5 in the material channel, increasing the gap between the lifting plates 1, and increasing the weight of the second dispersing chain 7. This represents a 12% increase in drying capacity and significantly improves the drying kiln's production capacity.

[0040] In practice:

[0041] Inside the drum 6, lifting plates 1 are evenly arranged along the first direction and circumference. A second dispersing chain 7 is set circumferentially between the lifting plates 1. When the drum 6 rotates, the lifting plates 1 lift and agitate the material. The first dispersing chain 5 and the second dispersing chain 7 disperse the material, preventing agglomeration and vibrating to clean the drum wall and lifting plates 1, reducing the adhesion of laterite nickel ore. Under the combined action of the lifting plates 1 and the second dispersing chain 7, the laterite nickel ore is repeatedly lifted by the lifting plates 1. The two chains dislodge the adhering material, and the material is carried by inertia to the upper part of the drum and then continuously scattered down, forming a uniform curtain of material inside the drum. This allows for sufficient heat exchange with the hot airflow inside the drum. Due to the repeated scattering of the material, the moisture it contains is gradually dried. The improved lifting plates and drum effectively prevent laterite nickel ore from adhering, clumping, and forming a uniform curtain, significantly improving the drying kiln's capacity.

[0042] The shape of the material channel in the lifting plate 1 is adjusted to a rectangle, the gap between the material channels is increased, and a first dispersing chain 5 is added inside the material channel to improve the ability to disperse materials and reduce adhesion of the lifting plate 1; the gap between the two lifting plates 1 is increased from the original 400mm to a bottom spacing of 1007mm and a top spacing of 747mm, reducing the accumulation of laterite nickel ore in the drum and increasing the curtain area; the weight of the second dispersing chain 7 is increased, increasing the swing amplitude and weight, significantly reducing the adhesion of laterite nickel ore to the drum body, and significantly improving the drying kiln capacity.

[0043] In this embodiment, the modified lifting plate 1 and the second dispersing chain 7 greatly improved the drying capacity of the drying kiln, increased the material throughput, and released production capacity. The drying capacity of laterite nickel ore increased by 20 tons per hour, resulting in a significant increase in production capacity.

[0044] 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 lifting plate, characterized in that, include: The system comprises fixed rods, support plates, comb teeth, and a first dispersing chain; two fixed rods extend along a first direction and are arranged opposite each other along a second direction; at least two support plates are spaced apart between the two fixed rods; multiple comb teeth are spaced apart between adjacent support plates; and two fixed rods are connected to the two ends of each comb tooth to divide the space between adjacent support plates into multiple rectangular material channels; a first dispersing chain is provided in each material channel; and two fixed rods are connected to the two ends of each first dispersing chain; the comb teeth are arc-shaped, with the inner arc side of the comb teeth being the receiving side and the outer arc side of the comb teeth being the discharging side; and the first direction is perpendicular to the second direction.

2. The lifting plate according to claim 1, characterized in that: The length of the first disintegrating chain is greater than or equal to the length of the comb teeth.

3. The lifting plate according to claim 1, characterized in that: The spacing between two adjacent comb teeth is 40–90 mm.

4. The lifting plate according to claim 1, characterized in that: The support plate includes a first plane and a second plane arranged opposite each other along a first direction, a third plane and a fourth plane arranged opposite each other along a second direction, and a fifth plane and a sixth plane arranged opposite each other along a third direction. The first plane and the second plane are used to connect the fixing rod, the third plane is used to connect the inner wall of the drum, the fifth plane is the material receiving surface, and the sixth plane is the material discharging surface. The first direction, the second direction, and the third direction are perpendicular to each other.

5. The lifting plate according to claim 4, characterized in that: The fifth plane has an arc surface that is concave to the sixth plane.

6. The lifting plate according to claim 4, characterized in that: The length of the third plane along the third direction is greater than the length of the fourth plane along the second direction.

7. A drying kiln drum, characterized in that: The device includes a roller, a second dispersing chain, and a lifting plate as described in any one of claims 1 to 6; the roller extends axially along a first direction, with a first end of the roller serving as a feed end and a second end serving as a discharge end along the first direction; multiple lifting plates are evenly distributed along the first direction on the inner wall of the roller to form lifting plate groups on the inner wall of the roller, and the multiple lifting plate groups are evenly distributed along the circumference of the roller; the second dispersing chain is arranged along the first direction on the inner wall of the roller and is located between two adjacent lifting plate groups.

8. The drying kiln drum according to claim 7, characterized in that: The first end of the second dispersing chain is close to the feed end of the drum, and the second end of the second dispersing chain is close to the discharge end of the drum. The second dispersing chain has multiple connection points with the inner wall of the drum so that the second dispersing chain is arranged in a wave shape on the inner wall of the drum.

9. The drying kiln drum according to claim 7, characterized in that: The distance between two adjacent connection points of the second disintegrating chain is 60-80cm, and the weight of the entire second disintegrating chain is 450-500kg.

10. The drying kiln drum according to claim 7, characterized in that: The interval between two adjacent lifting plates arranged along the circumference of the drum is greater than 400mm.

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