Magnetic separation equipment and magnetic separation method for producing fine iron powder

Abstract

The invention relates to the technical field of fine iron powder production, in particular to magnetic separation equipment for fine iron powder production and a magnetic separation method.The magnetic separation equipment comprises a magnetic separator, a feeding pipe, a supporting plate and a pretreatment mechanism, the supporting plate used for mounting the pretreatment mechanism is arranged above the magnetic separator, and mounting sleeves are perpendicularly inserted into the four corners of the lower end face of the supporting plate; the bottom end of the stand column is fixedly connected with an equipment supporting base on the lower portion of the magnetic separator, a feeding pipe is fixedly connected to the top end of the magnetic separator in an inserted mode, and the end, away from the magnetic separator, of the feeding pipe is connected with a feeding pipe on the lower portion of the pretreatment mechanism. A first through hole allowing a drying barrel on the upper portion of the pretreatment mechanism to penetrate through is formed in the upper end face of the feeding platform. According to the equipment, the functions of drying, scattering, grinding, magnetic separation and the like are integrated, the production link is shortened, the transfer time and loss of raw materials among the equipment are reduced, meanwhile, due to the integrated design, the occupied area of the equipment is reduced, and the purchase, installation and later maintenance costs of the equipment are reduced.

Description

Technical Field

[0001] This invention relates to the field of iron concentrate production technology, specifically to a magnetic separation device and method for iron concentrate production. Background Technology

[0002] Magnetic separators are among the most widely used and versatile machines in industry, suitable for separating substances with magnetic differences. They are widely used in industries such as mining, timber, ceramics, chemicals, and food.

[0003] Iron ore, after being processed through crushing, grinding, and beneficiation, is produced as iron concentrate, which is the main raw material for iron ore pellets. Fluctuations in the iron content of iron concentrate directly affect the quality of the finished iron ore pellets. Theoretically, any ore containing iron or iron compounds can be called iron ore; however, in industrial and commercial terms, iron ore must not only contain iron but also have commercial value. Iron concentrate is the main raw material for iron ore pellets, and fluctuations in its iron content directly affect the quality of the finished iron ore pellets.

[0004] At present, magnetic separation equipment used for iron concentrate production has certain functional limitations. It cannot dry damp raw materials during operation, and the lumpy materials in the raw materials are very easy to cause equipment blockage. This problem will lead to a decrease in equipment operating efficiency and thus fail to meet the production needs of enterprises.

[0005] Therefore, we propose a magnetic separation device and method for iron concentrate production. Summary of the Invention

[0006] The main objective of this invention is to provide a magnetic separation device and method for iron concentrate production. A drying drum structure is installed at the feed end, utilizing heating resistance wires within the heating layer to generate heat, which is then transferred to the drying chamber of the drying drum. This allows for preliminary drying of damp raw materials, effectively removing some moisture and solving the problem of handling damp raw materials. The equipment is adaptable to raw materials in various states, such as dampness and agglomeration, thus improving its applicability. It eliminates the need for companies to separately configure drying equipment, effectively addressing the problems in the prior art.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A magnetic separation device for producing iron concentrate includes a magnetic separator, a feed pipe, a support plate, and a pretreatment mechanism. The magnetic separator has a support plate above it for mounting the pretreatment mechanism. The support plate is a horizontally arranged rectangular plate structure. Mounting sleeves are vertically inserted into the four corners of the lower end face of the support plate. The mounting sleeves are fitted onto the top of a column. The bottom end of the column is fixedly connected to a support base at the bottom of the magnetic separator. A feed pipe is fixedly inserted into the top of the magnetic separator. The end of the feed pipe away from the magnetic separator is connected to a feeding pipe at the bottom of the pretreatment mechanism. A feeding platform is also provided above the magnetic separator. The upper surface of the feeding platform has a first through hole for the drying drum at the top of the pretreatment mechanism to pass through. An anti-slip pad is engaged at the location of the first through hole on the upper surface of the feeding platform. The pretreatment mechanism includes an assembly base, a sealing cover, a support frame, a mounting sleeve, a baffle plate, a support rod, a mounting base, a drying barrel, a buckle plate, a motor, a valve, a heating layer, a rotating shaft, a stirring rod, a storage barrel, a feeding pipe, a connecting pipe, a heating resistance wire, a sliding plate, a pull plate, and a socket. The storage barrel has a cavity, and a grinding assembly is installed on the upper part of the cavity.

[0008] By adopting the above technical solutions, the equipment integrates functions such as drying, dispersing, grinding, and magnetic separation into one unit, shortening the production chain and reducing the transfer time and loss of raw materials between various devices. At the same time, the integrated design reduces the equipment's footprint and the costs of equipment purchase, installation, and subsequent maintenance. The synchronous motor-driven shaft enables coordinated operation of stirring, grinding, and feeding, reducing power consumption and further controlling energy costs in the production process. In addition, the equipment is easy to operate; operators only need to control valves, pull plates, and other components after feeding to complete the process switching, reducing the skill requirements for operators and indirectly reducing labor costs. The storage tank design allows for the temporary storage of pre-treated raw materials. Once a certain amount has been accumulated and the dryness and fineness requirements are confirmed, the magnetic separation process can be started, achieving a flexible connection between the pre-treatment and magnetic separation stages, which allows enterprises to flexibly adjust the operation rhythm according to the production plan.

[0009] Specifically, the grinding assembly includes a first grinding seat, a second grinding seat, a crossbar, a first protrusion and a second protrusion. The top end of the first grinding seat is fixedly connected to the inner wall of the top end of the sealing cover. The bottom end of the first grinding seat is inserted into the upper part of the inner wall of the storage bucket. The sealing cover is snapped into the top end of the storage bucket. An assembly seat is fitted on the lower part of the outer side of the storage bucket.

[0010] Specifically, a feeding channel for material to pass through is provided at the center of the top of the first grinding seat and at the center of the upper surface of the sealing cover. A grinding chamber communicating with the feeding channel is provided at the center of the bottom of the first grinding seat. A second grinding seat is provided in the grinding chamber, and a grinding channel is provided between the second grinding seat and the first grinding seat.

[0011] Specifically, the second grinding seat is fixedly sleeved on the lower part of the rotating shaft. Multiple relatively parallel stirring rods are fixedly welded to the outer side of the upper part of the rotating shaft. A horizontal crossbar is also provided below the second grinding seat. The bottom end of the rotating shaft is rotatably connected to the crossbar at the center. The two ends of the crossbar are fixedly connected to the inner walls of the two ends of the storage barrel at the center. The upper part of the rotating shaft passes through the feeding channel, the connecting pipe, the drying barrel, and the buckle plate in sequence and is connected to the output shaft at the bottom of the motor through a coupling.

[0012] Specifically, a connecting pipe is fixedly installed at the center of the bottom of the drying drum, and a slot for installing a buckle plate is provided at the top of the drying drum. Both ends of the buckle plate are fixedly connected to the upper outer side of the drying drum by a second bolt. A heating layer is embedded in the inner wall of the drying drum, and a drying chamber is provided inside the drying drum. A heating resistance wire is provided inside the heating layer.

[0013] Specifically, a baffle plate is fixedly fitted on the lower outer side of the connecting pipe. The baffle plate is located on the upper end face of the sealing cover. Four sets of relatively parallel sockets are also fixedly connected to the upper end face of the sealing cover. A support rod is inserted into the top of the socket. The top of the support rod is vertically inserted into the bottom of the mounting base. The mounting base is fitted on the lower outer side of the drying barrel.

[0014] Specifically, the baffle plate is a horizontally arranged rectangular plate structure. The upper surface of the baffle plate has a mounting hole adapted to the connecting pipe at the center. The inner wall of the mounting hole has a second slot for the slide plate to pass through at the center. The upper surface of the baffle plate has a movable cavity at both ends that communicates with the second slot. Two slide plates are arranged parallel to each other. A pull plate is vertically inserted into the upper surface of the slide plate at the end away from the mounting hole. The inner wall of the bottom end of the movable cavity has a sliding groove adapted to the bottom end of the baffle plate. The slide plate has a second through hole at the center of the end away from the pull plate for the rotating shaft to pass through, and the lower part of the connecting tube has a first slot at the location of the second slot for the slide plate to pass through. The first slot is connected to the second slot.

[0015] By adopting the above technical solution, a drying drum structure is set at the feeding end. Heat is generated by the heating resistance wire in the heating layer and transferred to the drying chamber of the drying drum. This can preliminarily dry the damp raw materials, effectively remove some moisture, and solve the problem of difficult processing of damp raw materials. The equipment is suitable for raw materials in various states such as damp and lumpy, thereby improving the applicability of the equipment and eliminating the need for enterprises to configure drying equipment separately. The motor-driven shaft rotates the stirring rod within the drying chamber, simultaneously drying and thoroughly dispersing and mixing the raw materials. This breaks up small clumps and ensures even heating, preventing localized dampness and clumping. The raw materials entering the grinding assembly are finely ground into uniform powder through the compression of the raised structure within the grinding channel formed by the first and second grinding seats. This eliminates lumps and ensures continuous and stable operation from feeding to magnetic separation, reducing downtime for maintenance due to material blockage. The drying process reduces moisture content, preventing damp materials from adhering to the inner walls or magnetic separator components and affecting its performance. The grinding stage refines the raw materials into uniform powder, increasing the contact area between ferromagnetic minerals and the magnetic field. This allows for more precise separation of iron concentrate and non-magnetic gangue. Furthermore, the pre-treated raw materials have better flowability, allowing them to quickly pass through the separation zone, reducing residence time and improving the separator's efficiency.

[0016] Specifically, the assembly base is a cylindrical structure. Four sets of opposing support frames are arranged radially on the lower outer side of the assembly base with its center as the center. One side of the support frame is fixedly connected to the outer side of the assembly base. The bottom end of the support frame is inserted into the embedded groove located on the upper surface of the support plate and fixedly connected to the support plate by the first bolt. A third through hole for the feeding pipe to pass through is provided in the center of the upper surface of the support plate. The top end of the feeding pipe is fixedly connected to the bottom end of the storage barrel. A valve is installed on the feeding pipe. The bottom end of the feeding pipe passes through the third through hole and is engaged with the top end of the feed pipe.

[0017] A magnetic separation method for a magnetic separator used in iron concentrate production includes the following steps: S1. Feeding: The operator stands on the feeding platform and feeds the wet or agglomerated iron concentrate raw material to be processed into the opening at the top of the drying drum. The material is located inside the drying chamber. S2. Drying: Start the motor and the heating resistance wire in the heating layer. The heating resistance wire works, and heat is transferred to the drying chamber through the heating layer to initially dry the falling material and remove some moisture. At the same time as the heating resistance wire is working, the motor synchronously drives the rotating shaft to rotate, which drives the multiple stirring rods on it to rotate in the drying chamber, breaking up and stirring the material, making the material heat more evenly, and initially breaking up small clumps. The stirred material moves downward under the action of gravity. S3. Fine Grinding: The material, after preliminary drying and stirring, enters the grinding assembly at the top of the storage tank through the connecting pipe. At the same time, the rotating shaft drives the second grinding seat at the bottom to rotate in the grinding chamber of the first grinding seat. When the material passes through the grinding channel formed between the first and second grinding seats, it is squeezed by the first and second protrusions and finely ground into finer and more uniform powder. The ground iron concentrate falls into the cavity at the bottom of the storage tank for temporary storage. S4. When the material in the storage bin accumulates to a certain amount and it is confirmed that the material has reached the predetermined dryness and fineness requirements, prepare for magnetic separation; pull the two slide plates along the slide groove to both sides by pulling the pull plate to fully open the lower channel of the connecting pipe; open the valve on the feeding pipe; under the action of gravity, the dried and ground iron concentrate in the cavity of the storage bin enters the magnetic separator below through the feeding pipe and the feed pipe. S5. After the material enters the magnetic separator, the equipment operates according to the preset magnetic field strength.

[0018] The beneficial effects of this invention are: (1) The magnetic separation equipment and method for iron concentrate production described in this invention are provided with a drying barrel structure at the feed end. Heat is generated by the heating resistance wire in the heating layer and transferred to the drying chamber of the drying barrel. This can preliminarily dry the wet raw materials, effectively remove some moisture, and solve the problem of difficult processing of wet raw materials. The equipment is suitable for raw materials in various states such as wet and lumpy, thereby improving the applicability of the equipment. There is no need for enterprises to configure drying equipment separately. The motor-driven shaft rotates the stirring rod within the drying chamber, simultaneously drying and thoroughly dispersing and mixing the raw materials. This breaks up small clumps and ensures even heating, preventing localized dampness and clumping. The raw materials entering the grinding assembly are finely ground into uniform powder through the compression of the raised structure within the grinding channel formed by the first and second grinding seats. This eliminates lumpy materials, ensuring continuous and stable operation from feeding to magnetic separation, and reducing downtime for maintenance due to material blockage. The drying process reduces the moisture content of the raw materials, preventing damp materials from adhering to the inner walls of the equipment or the magnetic separation components, thus affecting the performance of the magnetic separator. The grinding stage refines the raw materials into uniform powder, increasing the contact area between ferromagnetic minerals and the magnetic field. This allows the magnetic separator to more accurately separate iron concentrate from non-magnetic gangue. Furthermore, the pre-treated raw materials have better flowability, allowing them to quickly pass through the separation zone after entering the magnetic separator, reducing residence time and improving the efficiency of the magnetic separator. (2) The magnetic separation equipment and method for iron concentrate production described in this invention integrates functions such as drying, dispersing, grinding and magnetic separation into one unit, shortening the production chain and reducing the transfer time and loss of raw materials between various equipment. At the same time, the integrated design reduces the equipment footprint and reduces the cost of equipment purchase, installation and subsequent maintenance. The motor synchronously drives the rotating shaft to achieve coordinated operation of stirring, grinding and feeding, reducing power consumption and further controlling energy costs in the production process. In addition, the equipment is easy to operate. Operators only need to control valves, pull plates and other components after feeding to complete the process switching, reducing the skill requirements of operators and indirectly reducing labor costs. Through the design of the storage tank, the pre-treated raw materials can be temporarily stored. After accumulating to a certain amount and confirming that the dryness and fineness requirements are met, the magnetic separation process can be started, realizing the flexible connection between the pre-treatment and magnetic separation links, which makes it convenient for enterprises to flexibly adjust the operation rhythm according to the production plan. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the pretreatment mechanism of the present invention; Figure 3 This is a schematic diagram of the internal structure of the assembly base of the present invention; Figure 4 This is a schematic diagram of the internal structure of the first grinding seat of the present invention; Figure 5 This is a schematic diagram of the internal structure of the drying drum of the present invention; Figure 6 This is a perspective view of the baffle plate of the present invention; Figure 7 This is a perspective view of the drying drum of the present invention; Figure 8 This is a perspective view of the assembly base of the present invention; Figure 9 For the present invention Figure 8 Enlarged view of point A in the middle; In the diagram: 1. Magnetic separator; 2. Feed pipe; 3. Column; 4. Support plate; 5. Pretreatment mechanism; 6. Assembly base; 7. Sealing cover; 8. Grinding assembly; 801. First grinding base; 802. Second grinding base; 803. Grinding channel; 804. Crossbar; 805. Feed channel; 806. Grinding chamber; 807. First protrusion; 9. Support frame; 10. Mounting sleeve; 11. Baffle plate; 12. Support rod; 13. Mounting base; 14. Drying barrel; 15. Feeding platform; 16. 17. Anti-slip mat; 18. Buckle plate; 19. Motor; 20. Valve; 21. Heating layer; 22. Drying chamber; 23. Rotating shaft; 24. Stirring rod; 25. Storage bucket; 26. Cavity; 27. Feeding pipe; 28. First through hole; 29. ​​Embedded groove; 30. Connecting pipe; 31. Heating resistance wire; 32. Slot; 33. Moving chamber; 34. Slide plate; 35. Second through hole; 36. Slide groove; 37. First slot; 38. Pull plate; 39. Socket; 40. Mounting hole; 41. Second slot. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0022] As one embodiment of the present invention, such as Figures 1-9 As shown, the magnetic separation equipment for iron concentrate production of the present invention includes a magnetic separator 1, a feed pipe 2, a support plate 4, and a pretreatment mechanism 5. The magnetic separator 1 is provided with a support plate 4 for installing the pretreatment mechanism 5. The support plate 4 is a horizontally arranged rectangular plate structure. The four corners of the lower end face of the support plate 4 are vertically inserted with mounting sleeves 10. The mounting sleeves 10 are fitted on the top of the column 3. The bottom end of the column 3 is fixedly connected to the equipment support base at the bottom of the magnetic separator 1. The feed pipe 2 is fixedly inserted at the top of the magnetic separator 1. The end of the feed pipe 2 away from the magnetic separator 1 is connected to the feeding pipe 26 at the bottom of the pretreatment mechanism 5. The magnetic separator 1 is also provided with a feeding platform 15. The upper end face of the feeding platform 15 is provided with a first through hole 27 for the drying barrel 14 at the top of the pretreatment mechanism 5 to pass through. The upper end face of the feeding platform 15 is fitted with an anti-slip pad 16 at the position of the first through hole 27. The pretreatment mechanism 5 includes an assembly base 6, a sealing cover 7, a support frame 9, an installation sleeve 10, a baffle plate 11, a support rod 12, an installation base 13, a drying barrel 14, a buckle plate 17, a motor 18, a valve 19, a heating layer 20, a rotating shaft 22, a stirring rod 23, a storage barrel 24, a feeding pipe 26, a connecting pipe 29, a heating resistance wire 30, a sliding plate 33, a pull plate 37, and a socket 38. The storage barrel 24 has a cavity 25, and a grinding assembly 8 is installed on the upper part of the cavity 25.

[0023] In operation, the operator stands on the feeding platform 15 and feeds the damp or agglomerated iron concentrate raw material to be processed into the drying chamber 21 through the opening at the top of the drying drum 14. The material is located inside the drying chamber 21. The motor 18 and the heating resistance wire 30 in the heating layer 20 are started. The heating resistance wire 30 works, and heat is transferred to the drying chamber 21 through the heating layer 20 to initially dry the falling material and remove some moisture. While the heating resistance wire 30 is working, the motor 18 synchronously drives the rotating shaft 22 to rotate, which in turn drives the multiple stirring rods 23 on it to rotate in the drying chamber 21, breaking up and stirring the material, making the material heat more evenly, and initially breaking up small lumps. The stirred material moves downward under the action of gravity. The material that has been initially dried and stirred enters the grinding assembly 8 at the top of the storage drum 24 through the connecting pipe 29. The rotating shaft 22 simultaneously drives the grinding assembly 8 at the bottom of the storage drum 24. The second grinding seat 802 rotates within the grinding chamber 806 of the first grinding seat 801. As the material passes through the grinding channel 803 formed between the first grinding seat 801 and the second grinding seat 802, it is squeezed by the first protrusion 807 and the second protrusion, and finely ground into a finer, more uniform powder. The ground iron concentrate falls into the cavity 25 at the bottom of the storage bin 24 for temporary storage. When the material in the storage bin 24 accumulates to a certain amount, and it is confirmed that the material has reached the predetermined dryness and fineness requirements, magnetic separation is prepared. The two sliding plates 33 are pulled apart along the slide groove 35 by the pull plate 37, fully opening the lower passage of the connecting pipe 29. The valve 19 on the feeding pipe 26 is opened. Under the action of gravity, the dried and ground iron concentrate in the cavity 25 of the storage bin 24 enters the magnetic separator 1 below through the feeding pipe 26 and the feed pipe 2.

[0024] The present invention also includes that the grinding assembly 8 includes a first grinding seat 801, a second grinding seat 802, a crossbar 804, a first protrusion 807 and a second protrusion. The top end of the first grinding seat 801 is fixedly connected to the inner wall of the top end of the sealing cover 7. The bottom end of the first grinding seat 801 is inserted into the upper part of the inner wall of the storage bucket 24. The sealing cover 7 is snapped into the top end of the storage bucket 24. An assembly seat 6 is sleeved on the lower part of the outer side of the storage bucket 24.

[0025] The present invention further includes a feeding channel 805 through which material passes through the center of the top of the first grinding seat 801 and the center of the upper surface of the sealing cover 7, a grinding cavity 806 communicating with the feeding channel 805 is provided at the center of the bottom of the first grinding seat 801, a second grinding seat 802 is provided in the grinding cavity 806, and a grinding channel 803 is provided between the second grinding seat 802 and the first grinding seat 801.

[0026] The present invention also includes a second grinding seat 802 fixedly sleeved on the lower part of the rotating shaft 22, and multiple relatively parallel stirring rods 23 fixedly welded to the outer side of the upper part of the rotating shaft 22. A horizontally arranged crossbar 804 is also provided below the second grinding seat 802. The bottom end of the rotating shaft 22 is rotatably connected to the crossbar 804 at the center. The two ends of the crossbar 804 are fixedly connected to the inner walls of the two ends of the storage barrel 24 at the center. The upper part of the rotating shaft 22 passes through the feeding channel 805, the connecting pipe 29, the drying barrel 14 and the buckle plate 17 in sequence and is connected to the output shaft at the bottom of the motor 18 through a coupling.

[0027] The present invention also includes a connecting pipe 29 fixedly installed at the center of the bottom end of the drying barrel 14, a slot 31 for installing a buckle plate 17 at the top end of the drying barrel 14, both ends of the buckle plate 17 being fixedly connected to the upper outer side of the drying barrel 14 by a second bolt, a heating layer 20 embedded in the inner wall of the drying barrel 14, a drying chamber 21 inside the drying barrel 14, and a heating resistance wire 30 inside the heating layer 20.

[0028] The present invention also includes a baffle plate 11 fixedly sleeved on the lower outer side of the connecting pipe 29. The baffle plate 11 is located on the upper end face of the sealing cover 7. The upper end face of the sealing cover 7 is also fixedly connected with four sets of relatively parallel sockets 38. A support rod 12 is inserted into the top of the socket 38. The top of the support rod 12 is vertically inserted into the bottom end of the mounting base 13. The mounting base 13 is sleeved on the lower outer side of the drying barrel 14.

[0029] The present invention also includes that the baffle plate 11 is a horizontally arranged rectangular plate structure, and the upper end face of the baffle plate 11 is provided with an installation hole 39 adapted to the connecting pipe 29 at the center. The inner wall of the installation hole 39 is provided with a second slot 40 for the slide plate 33 to pass through at the center. The upper end face of the baffle plate 11 is provided with a moving cavity 32 at both ends that communicates with the second slot 40. Two slide plates 33 are arranged parallel to each other. A pull plate 37 is vertically inserted into the upper end face of the slide plate 33 at the end away from the installation hole 39. The inner wall of the bottom end of the moving cavity 32 is provided with a sliding groove 35 adapted to the bottom end of the baffle plate 11. The slide plate 33 is provided with a second through hole 34 at the center of the end away from the pull plate 37 for the rotating shaft 22 to pass through. The lower part of the connecting pipe 29 is provided with a first slot 36 at the location of the second slot 40 for the slide plate 33 to pass through. The first slot 36 is connected to the second slot 40.

[0030] The invention also includes a cylindrical structure for the assembly base 6, with four sets of opposing support frames 9 arranged radially around the lower outer side of the assembly base 6 with its center as the center. One side of each support frame 9 is fixedly connected to the outer side of the assembly base 6. The bottom end of each support frame 9 is inserted into an embedded groove 28 located on the upper surface of the support plate 4 and fixedly connected to the support plate 4 by a first bolt. A third through hole for the feeding pipe 26 to pass through is provided at the center of the upper surface of the support plate 4. The top end of the feeding pipe 26 is fixedly connected to the bottom end of the storage bucket 24. A valve 19 is installed on the feeding pipe 26. The bottom end of the feeding pipe 26 passes through the third through hole and is engaged with the top end of the feed pipe 2.

[0031] A magnetic separation method for a magnetic separator used in iron concentrate production includes the following steps: S1. Feeding: The operator stands on the feeding platform 15 and feeds the wet or agglomerated iron concentrate raw material to be processed into the opening at the top of the drying drum 14. The material is located in the drying chamber 21. S2. Drying: Start the motor 18 and the heating resistance wire 30 in the heating layer 20. The heating resistance wire 30 works, and the heat is transferred to the drying chamber 21 through the heating layer 20 to perform preliminary drying on the falling material and remove some moisture. At the same time as the heating resistance wire 30 works, the motor 18 synchronously drives the rotating shaft 22 to rotate, which drives the multiple stirring rods 23 on it to rotate in the drying chamber 21 to break up and stir the material, so that the material is heated more evenly and small lumps are initially broken up. The stirred material moves downward under the action of gravity. S3. Fine Grinding: The material, after preliminary drying and stirring, enters the grinding assembly 8 at the top of the storage tank 24 through the connecting pipe 29. The rotating shaft 22 simultaneously drives the second grinding seat 802 at its bottom to rotate within the grinding chamber 806 of the first grinding seat 801. When the material passes through the grinding channel 803 formed between the first grinding seat 801 and the second grinding seat 802, it is squeezed by the first protrusion 807 and the second protrusion and finely ground into a finer and more uniform powder. The ground iron concentrate falls into the cavity 25 at the bottom of the storage tank 24 for temporary storage. S4. When the material in the storage bin 24 accumulates to a certain amount and it is confirmed that the material has reached the predetermined dryness and fineness requirements, magnetic separation is prepared. The two slide plates 33 are pulled apart along the slide groove 35 by the pull plate 37 to fully open the lower channel of the connecting pipe 29. The valve 19 on the feeding pipe 26 is opened. Under the action of gravity, the dried and ground iron concentrate in the cavity 25 of the storage bin 24 enters the magnetic separator 1 below through the feeding pipe 26 and the feed pipe 2. S5. After the material enters the magnetic separator 1, the equipment operates according to the preset magnetic field strength.

[0032] This magnetic separation equipment and method for producing iron concentrate involves the operator standing on the feeding platform 15 and feeding the damp or agglomerated iron concentrate raw material into the drying chamber 21 through the opening at the top of the drying drum 14. The motor 18 and the heating resistance wire 30 within the heating layer 20 are then activated. The heating resistance wire 30 operates, transferring heat through the heating layer 20 to the drying chamber 21, initially drying the falling material and removing some moisture. Simultaneously, the motor 18 drives the rotating shaft 22 to rotate, causing multiple stirring rods 23 on it to rotate within the drying chamber 21, further dispersing and separating the material. Stirring ensures more even heating of the material and initially breaks up small lumps. The stirred material moves downward under gravity. After initial drying and stirring, the material enters the grinding assembly 8 at the top of the storage tank 24 through the connecting pipe 29. Simultaneously, the rotating shaft 22 drives the second grinding seat 802 at its lower part to rotate within the grinding chamber 806 of the first grinding seat 801. As the material passes through the grinding channel 803 formed between the first grinding seat 801 and the second grinding seat 802, it is squeezed by the first protrusion 807 and the second protrusion, and is finely ground into a finer and more uniform powder. The ground iron concentrate falls into the cavity 25 at the bottom of the storage tank 24 for temporary storage. When the material in the storage bin 24 accumulates to a certain amount and it is confirmed that the material has reached the predetermined dryness and fineness requirements, magnetic separation is prepared. The two sliding plates 33 are pulled apart along the sliding groove 35 by the pull plate 37 to fully open the lower channel of the connecting pipe 29. The valve 19 on the feeding pipe 26 is opened. Under the action of gravity, the iron concentrate that has been dried and ground in the cavity 25 of the storage bin 24 enters the magnetic separator 1 below through the feeding pipe 26 and the feed pipe 2. After the material enters the magnetic separator 1, the equipment works according to the preset magnetic field strength (the working principle of the magnetic separator 1 is the existing publicly available technology and will not be described in detail here). The ferromagnetic minerals (iron concentrate) are separated from the non-magnetic gangue. The separated iron concentrate is collected from the concentrate outlet of the magnetic separator 1, and the tailings are discharged from the tailings outlet.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A magnetic separation device for the production of iron concentrate, characterized in that The utility model relates to a kind of magnetic separators, it include magnetic separator (1), feed pipe (2), support plate (4) and pretreatment mechanism (5), the support plate (4) for installing pretreatment mechanism (5) is equipped with above the magnetic separator (1), the support plate (4) is horizontally arranged rectangular plate structure, the support plate (4) lower end surface four corners are vertically inserted with mounting sleeve (10), the mounting sleeve (10) is sleeved in the top of stand (3), the stand (3) bottom is fixedly connected with the equipment support of the lower part of magnetic separator (1), the top of magnetic separator (1) is fixedly inserted with feed pipe (2), the feed pipe (2) is connected with the lower part of pretreatment mechanism (5) of the feeding pipe (26) in the end away from magnetic separator (1), the upper side of magnetic separator (1) is also equipped with loading platform (15), the upper end surface of loading platform (15) is equipped with the first through-hole (27) for the drying barrel (14) of pretreatment mechanism (5) upper part to pass through, the upper end surface of loading platform (15) is located the first through-hole (27) and is connected with anti-skid pad (16) in the position of first through-hole (27); The pretreatment mechanism (5) includes assembly seat (6), sealing cover (7), support frame (9), mounting sleeve (10), baffle (11), support rod (12), mounting seat (13), drying barrel (14), buckling plate (17), motor (18), valve (19), heating layer (20), rotating shaft (22), stirring rod (23), storage barrel (24), feeding pipe (26), communication pipe (29), heating resistance wire (30), sliding plate (33), pull plate (37) and socket (38), the storage barrel (24) is equipped with cavity (25) in, the cavity (25) upper part is equipped with grinding assembly (8).

2. A magnetic separation device for fine iron ore production as claimed in claim 1 wherein, The grinding assembly (8) includes first grinding seat (801), second grinding seat (802), cross rod (804), first protrusion (807) and second protrusion, the top of first grinding seat (801) is fixedly connected with the inner wall of the top of sealing cover (7), the bottom of first grinding seat (801) is inserted in the inner wall of the upper part of storage barrel (24), the sealing cover (7) is clamped with the top of storage barrel (24), the assembly seat (6) is sleeved on the outside lower part of storage barrel (24).

3. A magnetic separation device for fine iron ore production as claimed in claim 2, wherein, The top of first grinding seat (801) is centrally penetrated with the feeding channel (805) for material to pass through, the bottom of first grinding seat (801) is centrally provided with grinding cavity (806) communicated with feeding channel (805), the second grinding seat (802) is provided in grinding cavity (806), and the grinding channel (803) is provided between the second grinding seat (802) and the first grinding seat (801).

4. A magnetic separation device for fine iron ore production as claimed in claim 3, wherein, The second grinding seat (802) is fixedly sleeved on the lower part of the rotating shaft (22), a plurality of relatively parallel stirring rods (23) are fixedly welded on the upper outer side of the rotating shaft (22), a horizontal cross rod (804) is further arranged below the second grinding seat (802), the rotating shaft (22) is rotationally connected to the central part of the cross rod (804), the cross rod (804) is fixedly connected to the central part of the inner wall of the two ends of the storage barrel (24), and the upper part of the rotating shaft (22) sequentially penetrates the feeding channel (805), the communication pipe (29), the drying barrel (14) and the buckle plate (17) and is connected with the output shaft at the bottom end of the motor (18) through the shaft coupling.

5. A magnetic separation device for fine iron ore production as claimed in claim 4, wherein, The drying barrel (14) is fixedly installed with the communication pipe (29) at the central part of the bottom end, the drying barrel (14) is provided with the clamping groove (31) for installing the buckle plate (17) at the top end, the two ends of the buckle plate (17) are fixedly connected to the outer side of the upper part of the drying barrel (14) through the second bolt, the inner wall of the drying barrel (14) is embedded with the heating layer (20), the drying barrel (14) is provided with the drying cavity (21) in the inside, and the heating layer (20) is provided with the heating resistance wire (30) in the inside.

6. A magnetic separation device for fine iron ore production as claimed in claim 5 wherein, The outer side of the lower part of the communication pipe (29) is fixedly sleeved with the material baffle (11), the material baffle (11) is located on the upper end face of the sealing cover (7), the upper end face of the sealing cover (7) is further fixedly connected with four groups of relatively parallel sockets (38), the sockets (38) are inserted with the supporting rods (12) at the top ends, the supporting rods (12) are vertically inserted into the bottom end of the mounting seat (13) at the top ends, and the mounting seat (13) is sleeved on the outer side of the lower part of the drying barrel (14).

7. A magnetic separation device for fine iron ore production as claimed in claim 6, wherein, The material baffle (11) is a horizontally arranged rectangular plate structure, the central part of the upper end face of the material baffle (11) is provided with the mounting hole (39) matched with the communication pipe (29), the central part of the inner wall of the mounting hole (39) is provided with the second insertion groove (40) for the sliding plate (33) to penetrate, the upper end face of the material baffle (11) is provided with the moving cavity (32) communicated with the second insertion groove (40) at the two ends, the sliding plate (33) is relatively parallel with two pieces, the upper end face of the end of the sliding plate (33) away from the mounting hole (39) is vertically inserted with the pull plate (37), and the bottom end inner wall of the moving cavity (32) is provided with the sliding groove (35) matched with the bottom end of the material baffle (11). The end of the sliding plate (33) away from the pull plate (37) is provided with the second through hole (34) for the rotating shaft (22) to penetrate, and the lower part of the communication pipe (29) is provided with the first insertion groove (36) for the sliding plate (33) to penetrate at the position of the second insertion groove (40), and the first insertion groove (36) is communicated with the second insertion groove (40).

8. The magnetic separation device for fine iron ore production according to claim 1, characterized in that, The assembling seat (6) is a cylindrical structure, and four groups of oppositely arranged support frames (9) are arranged radially with the center of the assembling seat (6) as the center on the lower part of the outer side of the assembling seat (6), one side of the support frame (9) is fixedly connected with the outer side of the assembling seat (6), the bottom end of the support frame (9) is inserted into the embedded groove (28) on the upper end face of the support plate (4) and is fixedly connected with the support plate (4) through the first bolt, the third through hole is arranged on the upper end face of the support plate (4) and is used for the feeding pipe (26) to pass through, the top end of the feeding pipe (26) is fixedly connected with the bottom end of the storage barrel (24), the valve (19) is arranged on the feeding pipe (26), and the bottom end of the feeding pipe (26) passes through the third through hole and is clamped with the top end of the feeding pipe (2).

9. The magnetic separation method of a magnetic separation apparatus for fine iron ore production according to any one of claims 1 to 8, characterized in that, Comprise the following steps: S1, feeding: the operator stands on the feeding platform (15), and the wet or caked iron concentrate powder to be treated is poured into the opening at the top of the drying barrel (14), and the material is located in the drying cavity (21); S2, drying: the motor (18) and the heating resistance wire (30) in the heating layer (20) are started, the heating resistance wire (30) works, heat is transmitted to the drying cavity (21) through the heating layer (20), the falling material is preliminarily dried, and part of the water is removed; at the same time that the heating resistance wire (30) works, the motor (18) synchronously drives the rotating shaft (22) to rotate, drives the plurality of stirring rods (23) thereon to rotate in the drying cavity (21), disperses and stirs the material, makes the material be heated more uniformly, and preliminarily breaks the small lumps, and the stirred material moves downward under the action of gravity; S3, fine grinding: the material preliminarily dried and stirred enters the grinding assembly (8) in the upper part of the storage barrel (24) through the communicating pipe (29), and the rotating shaft (22) simultaneously drives the second grinding seat (802) in the lower part to rotate in the grinding cavity (806) of the first grinding seat (801); when the material passes through the grinding channel (803) formed between the first grinding seat (801) and the second grinding seat (802), the material is finely ground into finer and more uniform powder by the extrusion of the first protrusion (807) and the second protrusion; the ground iron concentrate powder falls into the cavity (25) in the lower part of the storage barrel (24) and is temporarily stored; S4, when the material in the storage barrel (24) accumulates to a certain amount and it is confirmed that the material has reached the predetermined dryness and fineness requirements, the magnetic separation is prepared; the two sliding plates (33) are pulled apart along the sliding grooves (35) by the pull plate (37), the lower opening channel of the communicating pipe (29) is completely opened, the valve (19) on the feeding pipe (26) is opened, and the iron concentrate powder in the cavity (25) of the storage barrel (24) is fed into the magnetic separator (1) below through the feeding pipe (26) and the feeding pipe (2) under the action of gravity; S5, after the material enters the magnetic separator (1), the equipment works according to the preset magnetic field strength.

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