A kind of laterite nickel ore sintering mixing preheating device
By designing a dual-channel structure and automatic sealing plate in the laterite nickel ore sintering mixing preheating device, the hot air path is extended, solving the problems of insufficient heat utilization and dust generation, and achieving a highly efficient preheating effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- LIANYUNGANG HUALE ALLOY GROUP CO LTD
- Filing Date
- 2026-05-15
- Publication Date
- 2026-07-10
AI Technical Summary
Existing laterite nickel ore sintering mixing preheating devices suffer from insufficient heat utilization and severe dust generation, resulting in low preheating efficiency.
A dual-channel structure for preheating and mixing laterite nickel ore sintering was designed. By setting a sealing plate and a protective layer inside the material turning shell, the path of hot air in the device is extended. An automatically closing sealing plate is set at the hot air channel and the material turning structure to prevent material from entering the airflow channel.
This improved heat utilization, reduced dust generation, and ensured the stability and preheating efficiency of the equipment.
Smart Images
Figure CN122360138A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of laterite nickel ore sintering technology, specifically to a laterite nickel ore sintering mixing and preheating device. Background Technology
[0002] Preheating of laterite nickel ore for sintering is an important preparatory step before pyrometallurgical smelting. Its core purpose is to create favorable conditions for subsequent sintering and reduction reactions. The moisture content of laterite nickel ore is usually as high as 30%-40%. Preheating can effectively remove attached water and some crystal water, improve the material flowability and conveying performance. At the same time, preheating can partially decompose carbonates and activate reducing agents, providing a thermodynamic basis for subsequent reduction reactions.
[0003] Currently, when preheating and mixing laterite nickel ore for sintering, hot air is generally introduced into the tail end of the rotary kiln to achieve mixing and preheating of the laterite nickel ore for sintering. However, in actual operation, the hot air enters from the tail end of the device and exits from the feed inlet, which easily causes dust to be blown out. In addition, the heat stays in the device for a short time, which will cause insufficient heat utilization and reduce preheating efficiency. Summary of the Invention
[0004] In view of the shortcomings of existing laterite nickel ore sintering mixing preheating devices mentioned in the background art, the present invention provides a laterite nickel ore sintering mixing preheating device with the advantages of high preheating efficiency and low dust generation, thus solving the technical problems mentioned in the background art.
[0005] This invention provides the following technical solution: a preheating device for sintering and mixing of laterite nickel ore, comprising a cylinder, the cylinder being inclined to facilitate material discharge, a support and a driving device being provided on the outside of the cylinder, and a feeding hopper being installed at one end of the cylinder, the feeding hopper being connected to the cylinder through a rotary sealing structure, and the feeding hopper being fixedly installed on the support, the other end of the cylinder having a discharge port for material discharge, a discharge cylinder being connected inside the cylinder, and a tilting shell being connected to the top of the discharge cylinder, the opening of the tilting shell being located on the front side of the cylinder's rotation direction, so that the material can enter the tilting shell as the cylinder rotates, an air inlet being opened on one side of the tilting shell, a sealing plate being installed on the side of the air inlet located inside the tilting shell, and a hot air channel being connected to the tail of the cylinder, the hot air channel being in communication with the inside of the tilting shell.
[0006] Furthermore, the discharge cylinder is coaxial with the cylinder body, and a discharge port is provided at the bottom of the discharge cylinder to facilitate the discharge of materials inside the turning shell. A baffle connected to the inside of the discharge cylinder is provided on the side of the discharge port near the hot air channel. A connecting pipe connected to the discharge cylinder is provided on the side of the baffle near the hot air channel. At the same time, the discharge cylinder is connected to the hot air channel, so that the hot air can enter the turning shell, pass through the discharge cylinder, and then enter the cylinder body. This can prolong the path of the hot air inside the cylinder body, increase the contact time between the hot air and the material, thereby improving the heat utilization rate. At the same time, it can also reduce the problems of dust and material backflow caused by the hot air passing through the cylinder body.
[0007] Furthermore, the tipping shell is connected to the top of the discharge cylinder, and the outer side of the tipping shell is an arc-shaped structure coaxial with the discharge cylinder. The outer side of the tipping shell contacts the inner wall of the discharge cylinder. The tipping shell rotates with the rotation of the cylinder, allowing the material to enter the tipping shell under the action of gravity. The interior of the tipping shell is connected to the discharge cylinder. The material inside the tipping shell is discharged from the discharge port under the combined action of gravity and hot air. Several air inlets are opened on the side of the tipping shell near the hot air channel. A fixing ring is connected to the side of the tipping shell located inside the connecting pipe. The fixing ring is fixedly connected to the annular structure on the tipping shell.
[0008] Furthermore, a limiting rod is connected inside the air inlet, with one end of the limiting rod located inside the material turning shell having a pointed end.
[0009] Furthermore, the sealing plate is connected to the fixed ring by a spring. The force generated by the deformation of the spring is less than the air force output by the connecting pipe. The sealing plate is provided with several sleeves, the positions of which correspond one-to-one with the limiting rods. The sleeves are movably fitted inside the limiting rods, and the internal specifications of the sleeves correspond to the same specifications at the bottom of the limiting rods. In the natural state of the spring, the sleeves are fitted outside the limiting rods and close the air inlet. The sealing plate is connected to the outside of the spring with a protective layer, which can protect the outside of the spring and avoid problems such as jamming.
[0010] Furthermore, the two ends of the protective layer are respectively connected to the fixing ring and the turning shell. The protective layer is made of a soft and airtight material. The extensibility of the protective layer is greater than the range of motion of the spring connected to the sealing plate. When the hot air channel delivers hot air through the connecting pipe, the airflow enters the protective layer, causing the spring to stretch under force. This causes the sealing plate to rotate and the air inlet to open, achieving the effect of delivering airflow into the turning shell and preheating the laterite nickel ore. When the hot air delivery stops, the sealing plate returns to its original position and closes the air inlet, preventing material from entering the connecting pipe and ensuring the stability of the device.
[0011] Furthermore, the two ends of the connecting pipe are connected to the discharge cylinder and the tipping shell respectively, and the connecting pipe is sleeved on the outside of all air inlets to achieve the effect of conveying hot air.
[0012] Furthermore, the hot air duct is connected to the cylinder and its internal discharge cylinder via a rotary sealing structure.
[0013] The present invention has the following beneficial effects: 1. By setting the material mixing structure inside the device to a dual-channel structure and connecting it with hot air, the present invention can extend the path of hot air inside the device, increase the residence time of hot air, and improve the efficiency of material preheating and energy utilization.
[0014] 2. This invention provides an automatically closing sealing plate at the connection between the hot air and the material mixing structure. This allows the channel to be closed when the hot air is turned off, preventing materials from entering the airflow channel and facilitating the later maintenance and other operations of the device. Attached Figure Description
[0015] Figure 1 A schematic diagram of the overall structure of the invention; Figure 2 This is a bottom-view structural diagram of the present invention; Figure 3 This is a half-sectional view of the sealing plate position in this invention; Figure 4 This is an enlarged structural schematic diagram of point A in soil 3 of the present invention; Figure 5 This is a half-sectional view of the fixed ring position in this invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram at point B; Figure 7 This is a schematic diagram of the cross-sectional structure of the material-turning shell position in this invention.
[0016] In the diagram: 1. Cylinder; 2. Discharge cylinder; 21. Discharge port; 22. Baffle plate; 3. Flipping shell; 31. Air inlet; 311. Limiting rod; 32. Fixing ring; 4. Sealing plate; 41. Shell; 5. Protective layer; 6. Connecting pipe; 7. Hot air channel; 8. Feed hopper; 9. Discharge port. Detailed Implementation
[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0018] Please see Figure 1A preheating device for sintering laterite nickel ore includes a cylindrical body 1, which is inclined overall, with the end of the cylindrical body 1 near the feed hopper 8 being relatively far from the ground to facilitate material discharge. A support frame and a drive device are provided on the outside of the cylindrical body 1, and the feed hopper 8 is installed at one end of the cylindrical body 1. The feed hopper 8 is connected to the cylindrical body 1 via a rotary sealing structure, and the feed hopper 8 is fixedly mounted on the support frame. (See reference...) Figure 2 The other end of the cylinder 1 has a discharge port 9 for material discharge. (See reference...) Figure 3 The cylinder 1 is internally connected to a discharge cylinder 2. A tilting shell 3 is connected to the top of the discharge cylinder 2, and the opening of the tilting shell 3 is located at the front of the cylinder 1 in the direction of rotation, allowing material to enter the tilting shell 3 as the cylinder 1 rotates. The discharge cylinder 2 is coaxial with the cylinder 1, and a discharge port 21 is provided at the bottom of the discharge cylinder 2 to facilitate the discharge of material from inside the tilting shell 3. A partition 22 connected to the inside of the discharge cylinder 2 is provided on the side of the discharge port 21 near the hot air channel 7. A connecting pipe 6 communicating with the discharge cylinder 2 is provided on the side of the partition 22 near the hot air channel 7. The two ends of the connecting pipe 6... The discharge cylinder 2 and the turning shell 3 are connected respectively, and the connecting pipe 6 is sleeved on the outside of all air inlets 31 to achieve the effect of conveying hot air. At the same time, the discharge cylinder 2 is connected to the hot air channel 7. The partition 22 separates the discharge cylinder 2 into two parts, and the partition 22 is closer to the hot air channel 7, so that the hot air can enter the turning shell 3 and then enter the cylinder 1 through the discharge cylinder 2. This can prolong the path of the hot air inside the cylinder 1, increase the contact time between the hot air and the material, thereby improving the heat utilization rate. At the same time, it can also reduce the problems of dust and material backflow caused by the hot air passing through the cylinder 1.
[0019] Please see Figure 4 An air inlet 31 is provided on one side of the turning shell 3. A sealing plate 4 is installed on the side of the air inlet 31 inside the turning shell 3. A hot air channel 7 is connected to the tail of the cylinder 1. The hot air channel 7 is connected to the cylinder 1 and the discharge cylinder 2 inside it through a rotary sealing structure. The hot air channel 7 is also connected to the inside of the turning shell 3. (See reference...) Figure 7 The material-turning shell 3 is connected to the top of the discharge cylinder 2, and the outer side of the material-turning shell 3 is an arc-shaped structure coaxial with the discharge cylinder 2. The outer side of the material-turning shell 3 is in contact with the inner wall of the discharge cylinder 2. The material-turning shell 3 rotates with the rotation of the cylinder 1, so that the material can enter the material-turning shell 3 under the action of gravity. The interior of the material-turning shell 3 is connected to the discharge cylinder 2. The material inside the material-turning shell 3 is discharged from the discharge port 21 under the combined action of gravity and hot air. Several air inlets 31 are opened on the side of the material-turning shell 3 near the hot air channel 7. A fixing ring 32 is connected to the side of the material-turning shell 3 located inside the connecting pipe 6. The fixing ring 32 is fixedly connected to the annular structure on the material-turning shell 3.
[0020] Please see Figure 4 A limiting rod 311 is connected inside the air inlet 31. The end of the limiting rod 311 located inside the material turning shell 3 is a pointed tip. (See reference...) Figure 5-6 The sealing plate 4 is connected to the fixing ring 32 by a spring. The force generated by the deformation of the spring is less than the air force output by the connecting pipe 6. The sealing plate 4 is provided with several sleeves 41, the positions of which correspond one-to-one with the limiting rods 311. The sleeves 41 are movably fitted inside the limiting rods 311. The internal specifications of the sleeves 41 are the same as the specifications of the bottom end of the limiting rods 311. In the natural state of the spring, the sleeves 41 are fitted outside the limiting rods 311 and close the air inlet 31. The sealing plate 4 is connected to the outside of the spring by a protective layer 5. The protective layer 5 can protect the outside of the spring and prevent problems such as jamming. The two ends of the protective layer 5 are... The protective layer 5 is made of a soft, airtight material and is connected to the fixed ring 32 and the turning shell 3. The extensibility of the protective layer 5 is greater than the range of motion of the spring connected to the sealing plate 4. When the hot air channel 7 delivers hot air through the connecting pipe 6, the airflow enters the protective layer 5, causing the spring to stretch under force. This causes the sealing plate 4 to rotate and the air inlet 31 to open, thus delivering airflow into the turning shell 3 and achieving the preheating effect of the laterite nickel ore. When the hot air delivery stops, the sealing plate 4 returns to its original position and closes the air inlet 31, preventing material from entering the connecting pipe 6 and ensuring the stability of the device.
[0021] In addition, the materials of the internal components of the cylinder 1, such as the discharge cylinder 2, the tipping shell 3, the sealing plate 4, and the connecting pipe 6, are all made of high-temperature resistant and corrosion-resistant alloy materials, which can meet the preheating requirements of laterite nickel ore.
[0022] The working principle of this invention is as follows: The device is installed in the corresponding area according to production needs. After connecting the appropriate lines and pipes, it is put into use. The laterite nickel ore material requiring preheating and mixing enters the cylinder 1 from the feed hopper 8. The cylinder 1 rotates under the action of its external drive. Hot air is delivered to the connecting pipe 6 through the hot air channel 7. Under the action of the airflow, the internal springs of the protective layer 5 extend, causing the sealing plate 4 to move away from the air inlet 31. The limiting rod 311 opens, and the airflow enters the tipping shell 3 from the air inlet 31. Inside, the material enters the turning shell 3 under the action of gravity and comes into contact with the hot air to achieve preheating. As the cylinder 1 rotates, the material enters the discharge cylinder 2 and is discharged from the discharge port 21. At the same time, the airflow also enters the cylinder 1 from the discharge port 21 to further achieve the preheating and mixing effect of the material. The material is finally discharged from the discharge port 9. When the hot air channel 7 stops conveying hot air, the spring inside the protective layer 5 returns to its original position, the sleeve 41 is re-sleeved onto the end of the limit rod 311, and the sealing plate 4 re-closes the air inlet 31.
[0023] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0024] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A preheating device for sintering and mixing of laterite nickel ore, comprising a cylindrical body (1), a support and a driving device being provided on the outside of the cylindrical body (1), and a feed hopper (8) being installed at one end of the cylindrical body (1), characterized in that: The cylinder (1) is connected to a discharge cylinder (2) inside. The top of the discharge cylinder (2) is connected to a turning shell (3), and the opening of the turning shell (3) is located on the front side of the rotation direction of the cylinder (1). An air inlet (31) is provided on one side of the turning shell (3). A sealing plate (4) is installed on the side of the air inlet (31) inside the turning shell (3). A hot air channel (7) is connected to the tail of the cylinder (1), and the hot air channel (7) communicates with the inside of the turning shell (3).
2. The laterite nickel ore sintering mixing preheating device according to claim 1, characterized in that: The discharge cylinder (2) is coaxial with the cylinder body (1), and a discharge port (21) is provided at the bottom of the discharge cylinder (2). A partition (22) connected to the inside of the discharge cylinder (2) is provided on the side of the discharge port (21) near the hot air channel (7). A connecting pipe (6) connected to the discharge cylinder (2) is provided on the side of the partition (22) near the hot air channel (7). At the same time, the discharge cylinder (2) is connected to the hot air channel (7).
3. The laterite nickel ore sintering mixing and preheating device according to claim 1, characterized in that: The material-turning shell (3) is connected to the top of the discharge cylinder (2), and the outer side of the material-turning shell (3) is an arc-shaped structure coaxial with the discharge cylinder (2). The outer side of the material-turning shell (3) is in contact with the inner wall of the discharge cylinder (2), and the interior of the material-turning shell (3) is connected to the discharge cylinder (2). Several air inlets (31) are opened on the side of the material-turning shell (3) near the hot air channel (7). A fixing ring (32) is connected to the side of the material-turning shell (3) inside the connecting pipe (6). The fixing ring (32) is fixedly connected to the ring structure on the material-turning shell (3).
4. The laterite nickel ore sintering mixing and preheating device according to claim 3, characterized in that: The air inlet (31) is connected to a limiting rod (311), and the end of the limiting rod (311) inside the turning shell (3) is a pointed end.
5. The laterite nickel ore sintering mixing and preheating device according to claim 4, characterized in that: The sealing plate (4) is connected to the fixed ring (32) by a spring. The force generated by the deformation of the spring is less than the wind force output by the connecting pipe (6). The sealing plate (4) is provided with several shells (41). The position of the shells (41) corresponds one-to-one with the limiting rod (311). The shells (41) are movably sleeved inside the limiting rod (311). The internal specifications of the shells (41) are the same as the specifications of the bottom end of the limiting rod (311). The sealing plate (4) is connected to the outside of the connecting spring with a protective layer (5).
6. The laterite nickel ore sintering mixing and preheating device according to claim 5, characterized in that: The two ends of the protective layer (5) are respectively connected to the fixing ring (32) and the flipping shell (3), and the protective layer (5) is made of soft and sealed material. The stretchable range of the protective layer (5) is greater than the range of motion of the spring connected to the sealing plate (4).
7. The laterite nickel ore sintering mixing and preheating device according to claim 3, characterized in that: The two ends of the connecting pipe (6) are respectively connected to the discharge cylinder (2) and the turning shell (3), and the connecting pipe (6) is sleeved on the outside of all air inlets (31).
8. The laterite nickel ore sintering mixing and preheating device according to claim 1, characterized in that: The hot air channel (7) is connected to the cylinder (1) and the discharge cylinder (2) inside it through a rotary sealing structure.