A magnetic separation device and beneficiation process for preparing titanium concentrate from ilmenite

Abstract

The present invention relates to the field of ore dressing technology, and particularly to a magnetic separation device and an ore dressing process for preparing titanium concentrate from ilmenite. The device includes a bracket, a primary hopper, a secondary hopper and a multi-stage magnetic separation roller system. The magnetic separation roller adopts a hollow shaft, a fan-shaped magnetic part and a drum structure. The magnetic part is composed of a magnetic conductive backing plate and neodymium iron boron magnets arranged at intervals. By combining the vertical and parallel magnetization directions, the magnetic field is enhanced to achieve efficient adsorption and separation of iron ore powder and titanium ore powder. The iron concentrate, titanium concentrate and tailings are separated by combining the primary magnetic separation roller and the secondary magnetic separation roller. The process includes screening of ilmenite raw stones, crushing and grinding, wet magnetic separation, and secondary magnetic separation after returning materials are dehydrated and dried. The purity of titanium concentrate is improved through multi-stage separation, and resource recycling is realized. The magnetic separation structure of the present invention is highly innovative and has high separation efficiency, significantly improving the comprehensive utilization rate of ilmenite.

Description

Technical Field

[0001] The present invention relates to the technical field of ore dressing, and in particular to a magnetic separation device and an ore dressing process for preparing titanium concentrate powder from ilmenite. Background Art

[0002] Ilmenite is an important raw material for extracting metallic titanium and titanium compounds, and its magnetic separation and purification process directly affects the grade and recovery rate of titanium concentrate powder. Currently, the commonly used flotation process generally combines magnetic separation and chemical reagent purification. After the initial separation of ilmenite powder using a dry-type drum magnetic separator, chemicals such as oxalic acid are used to further process and purify the initially separated ore powder. The grade of the ilmenite finished product selected in this process is relatively low, the operation process is cumbersome, the purification efficiency is low, and there are problems such as environmental pollution and high cost.

[0003] In addition, the maximum magnetic field outside the drum of the traditional dry-type drum magnetic separator can only reach 7000 GS, and the maximum drum linear speed cannot exceed 2 meters per second. Therefore, it is difficult to meet the requirements of the finished concentrate powder solely through the magnetic separation equipment process flow. As a result, the magnetic separation equipment can only be used as a preselection aid for ilmenite purification and cannot solely rely on the magnetic separation equipment to process to the final stage. Summary of the Invention

[0004] To solve the aforementioned technical problems, the present invention provides a magnetic separation device for preparing titanium concentrate powder from ilmenite. By adopting a multi-stage magnetic separation method, this device can accurately distinguish multiple types of ore powder at one time, solving the problem of low purification efficiency in existing purification methods. By improving the magnetic material, the magnetic field strength and the drum skin rotation speed are increased, solving the problem of low grade of the selected ilmenite finished product. Specifically, it is achieved through the following technical solutions.

[0005] A magnetic separation device for preparing titanium concentrate powder from ilmenite according to the present invention includes a bracket, on the top of which two primary hoppers are installed side by side. At the position of the bottom discharge port of the primary hopper, there is a blanking adjustment part for adjusting the blanking angle and speed.

[0006] Two first magnetic separation rollers are respectively located directly below the primary hoppers. Each first magnetic separation roller includes a hollow shaft, a number of support plates fixed on the hollow shaft, and magnetic parts installed on the support plates. A drum is rotatably installed on the hollow shaft and sleeved outside the magnetic parts.

[0007] A secondary hopper is located below the first magnetic separation rollers, including a first hopper in the middle and two second hoppers symmetrically distributed, for separating iron ore powder and titanium ore powder.

[0008] A driving part drives the drum to rotate around the hollow shaft through a belt drive mechanism.

[0009] Below the secondary hopper, there are also a second magnetic separation roller and a third magnetic separation roller, which have the same structure as the first magnetic separation roller. The second magnetic separation roller is located directly below the first hopper, and the third magnetic separation roller is located directly below the second hopper.

[0010] Below the second magnetic separation roller and the third magnetic separation roller, there is a blanking part, which includes a first chute, a second chute, a third chute, a fourth chute and a fifth chute, respectively used for outputting iron concentrate, titanium concentrate, returned material and tailings.

[0011] Preferably, the magnetic part includes a magnetic conductive backing plate and a first magnetic block and a second magnetic block arranged at intervals. The first magnetic block is fixedly installed on the magnetic conductive backing plate, and the second magnetic block is installed on the magnetic conductive backing plate through a non-magnetic spacer block.

[0012] The magnetization direction of the first magnetic block is parallel to the length direction of the magnetic conductive backing plate, the magnetization direction of the second magnetic block is perpendicular to the length direction of the magnetic conductive backing plate, and the same magnetic poles of the first magnetic block and the second magnetic block are close to each other.

[0013] Preferably, an end cover is rotatably installed on the hollow shaft. The end cover is fixed to the drum, and the end cover is coaxially fixed with the first belt pulley.

[0014] Preferably, the driving part includes a motor. The motor is fixed to the bracket, the output end of the motor is coaxially fixed with the second belt pulley, and the second belt pulley is connected to the first belt pulley by a belt drive.

[0015] Preferably, a lubricating oil passage is provided in the hollow shaft, and an oil pipe is fixedly installed at the end of the hollow shaft. The oil pipe is communicated with the lubricating oil passage.

[0016] Preferably, the blanking adjustment part includes an adjustment ring, which is coaxially fixed with the first rotating shaft. The first rotating shaft is rotatably installed on the bracket, and a first baffle is installed on the first rotating shaft. The first baffle is located at the position of the discharge port at the bottom of the primary hopper.

[0017] Preferably, a guiding part is provided between adjacent chutes of the blanking part. The guiding part includes a mounting seat, which is installed on the bracket, and a second rotating shaft is rotatably installed on the mounting seat.

[0018] The fastening bolt is threadedly connected to the nut fixed on the mounting seat, and the end of the fastening bolt can abut against the second rotating shaft. A second baffle is fixedly installed on the second rotating shaft, and the second baffle is used for guiding the blanking.

[0019] A third baffle is also fixedly installed on the side surface of the second rotating shaft, and the third baffle is used for separating adjacent chutes.

[0020] Preferably, the rotation direction of the first belt pulley driven by the driving part is opposite to the blanking direction on the outer surface of the drum.

[0021] Preferably, the magnetic part is of a sector structure and is coaxially arranged with the hollow shaft.

[0022] A beneficiation process for preparing titanium concentrate from ilmenite according to the present invention uses the above magnetic separation equipment to complete beneficiation, and includes the following steps:

[0023] S1. Preliminarily screen the original ilmenite ore, remove the tailings and perform dry magnetic separation on the remaining ore to obtain ilmenite ore.

[0024] S2. Crush and grind the ilmenite ore with a mill, screen to obtain ilmenite powder and some coarse ore that has not been completely ground and crushed, and transfer the coarse ore to the mill for recycling.

[0025] S3. Add an appropriate amount of clear water to the ilmenite powder obtained in step S2, and obtain iron concentrate, tailings and return material after two wet magnetic separations.

[0026] S4. Dehydrate the return material obtained in step S3, collect the liquid in a thickener, and drain and dry the solid to obtain return material powder.

[0027] S5. Perform magnetic separation on the return material powder obtained in step S4 with a magnetic separation equipment to obtain titanium concentrate, iron concentrate and tailings.

[0028] After adopting the above technical solution, the beneficial effects of the present invention are:

[0029] 1. Using this magnetic separation equipment for magnetic separation of ilmenite optimizes the traditional ilmenite beneficiation process, streamlines the process steps, and improves the beneficiation efficiency.

[0030] 2. By improving the magnetic part structure of the magnetic separation roller, the magnetic field strength of the magnetic roller is increased, and a high-speed lubricating oil channel is provided on the main shaft, so that the drum can reach a high rotation speed. The combination of the two effectively improves the magnetic separation efficiency.

[0031] 3. Through the primary hopper, multi-stage magnetic separation rollers and the return material recycling system, the processing efficiency of ilmenite powder is significantly improved, and continuous and large-scale production is realized.

[0032] 4. Adopting a process design combining dry magnetic separation and wet magnetic separation can effectively remove impurities, and gradually purify through multi-stage separation, so that the purity of the final titanium concentrate is significantly better than the traditional process. Description of the Drawings

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0034] Figure 1 It is a schematic structural diagram of a magnetic separation device for preparing titanium concentrate from ilmenite;

[0035] Figure 2 It is a partial structural diagram of the magnetic separation device;

[0036] Figure 3 It is a schematic structural diagram of the blanking adjustment part;

[0037] Figure 4 It is a schematic structural diagram of the first magnetic separation roller and the driving part;

[0038] Figure 5 It is a cross-sectional view of the first magnetic separation roller;

[0039] Figure 6 It is for Figure 5 partial structural diagram of;

[0040] Figure 7 It is for Figure 6 local enlarged view of part A in;

[0041] Figure 8 It is for Figure 7 disassembly schematic diagram of partial structure in;

[0042] Figure 9 It is a schematic structural diagram of the guiding part;

[0043] Figure 10 It is a process flow chart of ilmenite ore dressing and purification.

[0044] Explanation of reference numerals:

[0045] 101 - support, 102 - primary hopper, 103 - material guiding trough, 110 - blanking adjustment part, 111 - adjusting ring, 112 - first rotating shaft, 113 - first baffle, 120 - secondary hopper, 121 - first hopper, 122 - second hopper, 130 - guiding part, 131 - mounting seat, 132 - second rotating shaft, 133 - fastening bolt, 134 - second baffle, 135 - third baffle, 140 - blanking part, 141 - first material channel, 142 - second material channel, 143 - third material channel, 144 - fourth material channel, 145 - fifth material channel;

[0046] 200 - First magnetic separation roller, 201 - Hollow core shaft, 202 - Support plate, 203 - End cover, 204 - Drum, 205 - First pulley, 206 - Lubricating oil passage, 207 - Oil pipe, 210 - Magnetic part, 211 - Magnetic conductive backing plate, 212 - Magnetic insulation spacer, 213 - First magnetic block, 214 - Second magnetic block;

[0047] 300 - Second magnetic separation roller;

[0048] 400 - Third magnetic separation roller;

[0049] 500 - Driving part, 501 - Motor, 502 - Second pulley, 503 - Transmission belt. Detailed implementation mode

[0050] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in combination with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present invention and are not configured to limit the present invention. For those skilled in the art, the present invention can be implemented without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by showing examples of the present invention.

[0051] The orientation terms appearing in the following description are all the directions shown in the figures and do not limit the specific structure of the present invention. In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "installation, connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be directly connected or indirectly connected. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] An embodiment of the present invention provides a magnetic separation device for preparing titanium concentrate from ilmenite. Refer to Figure 1 , Figure 2 , Figure 3 , the magnetic separation device for preparing titanium concentrate from ilmenite includes a bracket 101. Two primary hoppers 102 are arranged side by side at the same horizontal height on the top of the bracket 101. The primary hoppers 102 are used to hold ilmenite powder. An outlet is opened at the bottom of the primary hopper 102, and a blanking adjustment part 110 is installed at the outlet position for adjusting the blanking angle and blanking speed.

[0053] The blanking adjustment part 110 includes an adjustment ring 111. The adjustment ring 111 is coaxially fixed with the first rotating shaft 112. The first rotating shaft 112 is rotatably installed on the bracket 101. A V-shaped first baffle 113 is fixedly installed on the side surface of the first rotating shaft 112. The first baffle 113 is located at the position of the discharge port at the bottom of the primary hopper 102.

[0054] Below the two primary hoppers 102, first magnetic separation rollers 200 are respectively installed. The first magnetic separation rollers 200 are used for the primary separation of ilmenite powder, separating iron ore powder and titanium ore powder into different flow channels.

[0055] A number of driving parts 500 are fixedly installed on the bracket 101, which are used to drive the rotation of the first magnetic separation rollers 200.

[0056] Below the two first magnetic separation rollers 200, a secondary hopper 120 is installed. The secondary hopper 120 includes a first hopper 121 at the middle position and two second hoppers 122 at both side positions. The two second hoppers 122 are symmetric about the center of the first hopper 121. The first hopper 121 is located directly below the two first magnetic separation rollers 200, and the second hoppers 122 are located below the sides of the first magnetic separation rollers 200.

[0057] See Figure 4 、 Figure 5 , the first magnetic separation roller 200 includes a hollow shaft 201. The hollow shaft 201 is fixedly installed on the bracket 101. The outer surface of the hollow shaft 201 is fixed with the first ends of a number of support plates 202 along the length direction of the hollow shaft 201. The second ends of the support plates 202 are fixedly connected with the magnetic part 210. The magnetic part 210 is a fan-shaped structure and is coaxially arranged with the hollow shaft 201.

[0058] Among them, the support plate 202 is a non-magnetic conductive support plate, which can avoid affecting the magnetic field of the magnetic part 210 and further affecting the ore dressing effect.

[0059] End caps 203 are respectively rotatably installed on both sides of the hollow shaft 201. A roller 204 is fixedly installed on the end cap 203. The roller 204 is coaxially arranged with the hollow shaft 201, and the inner surface of the roller 204 is in close contact with the outer surface of the magnetic part 210.

[0060] The driving part 500 includes a motor 501. The motor 501 is fixed to the bracket 101. The output end of the motor 501 is coaxially fixed with a second pulley 502. The second pulley 502 is in belt drive connection with a first pulley 205 through a transmission belt 503. The first pulley 205 is coaxially fixed with one of the end caps 203.

[0061] Among them, the magnetic parts 210 in the two first magnetic separation rollers 200 are symmetrically distributed about the center of the first hopper 121, and are respectively located on one side far from the first hopper 121. The two blanking adjustment parts 110 adjust the blanking position of ilmenite in the primary hopper 102 to the top of one side of the outer surface of the roller 204 close to the magnetic part 210.

[0062] Among them, the driving part 500 drives the first pulley 205 to rotate in a direction opposite to the blanking direction on the outer surface of the roller 204.

[0063] When the primary separation of ilmenite is carried out by using the above structure in this embodiment, first, the ilmenite powder in the primary hopper 102 starts to be blanked at an appropriate flow rate through the blanking adjustment part 110, and the blanking position is located on one side of the outer surface of the roller 204 close to the magnetic part 210. At this time, the motor 501 drives the first pulley 205 to rotate through the second pulley 502 and the transmission belt 503, and further drives the end cover 203 and the roller 204 to rotate around the axis of the hollow shaft 201 through the first pulley 205, and the rotation direction of the roller 204 is opposite to the blanking direction of ilmenite on the outer surface of the roller 204.

[0064] Since the position of the magnetic part 210 inside the roller 204 remains unchanged during the rotation of the roller 204, due to the difference in magnetic susceptibility between iron ore powder and ilmenite powder, iron ore powder and a small part of ilmenite powder will adhere to the outer surface of the roller 204 on the side close to the magnetic part 210 under the action of the magnetic field. This part of the ore powder will rotate with the roller 204 until it is transferred to a position outside the magnetic area, and it will no longer be attracted by the magnetic field, and will fall downward under its own gravity.

[0065] Based on the above principle, during the primary separation of ilmenite powder, iron ore powder and a small part of ilmenite powder are separated into the first hopper 121, and most of the ilmenite powder and tailings are separated into the second hopper 122.

[0066] As a further explanation of the above embodiment, see Figure 6 、 Figure 7 、 Figure 8 The magnetic part 210 includes a magnetic conductive backing plate 211. The second ends of several support plates 202 are fixed to the inner surface of the magnetic conductive backing plate 211. A number of first magnetic blocks 213 and second magnetic blocks 214 are installed on the outer surface of the magnetic conductive backing plate 211. The first magnetic blocks 213 and the second magnetic blocks 214 are arranged at intervals. The second magnetic blocks 214 are fastened to the outer surface of the magnetic conductive backing plate 211 by bolts. There is a magnetic insulation spacer block 212 between the first magnetic blocks 213 and the magnetic conductive backing plate 211. The first magnetic blocks 213 and the magnetic insulation spacer block 212 are fastened to the outer surface of the magnetic conductive backing plate 211 by bolts.

[0067] The magnetization direction of the second magnetic block 214 is perpendicular to the length direction of the magnetic conductive backing plate 211, the magnetization direction of the first magnetic block 213 is parallel to the length direction of the magnetic conductive backing plate 211, and the same magnetic poles of the second magnetic block 214 and the first magnetic block 213 are close to each other.

[0068] The first magnetic block 213 and the second magnetic block 214 are neodymium iron boron magnets.

[0069] Through the magnetization directions and arrangement structures of the first magnetic block 213 and the second magnetic block 214, the magnetism of the magnetic part 210 is greatly enhanced, thereby effectively realizing the adsorption and separation of iron ore powder, which is beneficial to improving the separation effect of ilmenite powder and ensuring the purity of the separated ore powder.

[0070] A lubricating oil passage 206 is arranged inside the hollow shaft 201. An oil outlet hole is opened at the installation position of the hollow shaft 201 where the end cover 203 is located. A oil pipe 207 is fixedly installed at the end of the hollow shaft 201, and the oil pipe 207 is communicated with the lubricating oil passage 206.

[0071] Through the above structure, effective lubrication of the installation position of the end cover 203 can be realized, thereby reducing the resistance when the end cover 203 rotates relative to the hollow shaft 201, which is beneficial to increasing the rotation speeds of the end cover 203 and the roller 204, and further increasing the separation speed of the ore powder and improving the working efficiency.

[0072] As a further explanation of the above embodiment, refer to Figure 2 , guide troughs 103 are fixedly installed at the bottom discharge port positions of the first hopper 121 and the second hopper 122 respectively, which are used to guide the flow direction and the falling position of the ore powder.

[0073] A second magnetic separation roller 300 is installed directly below the first hopper 121, and third magnetic separation rollers 400 are installed directly below both second hoppers 122. The structures and working principles of the second magnetic separation roller 300 and the third magnetic separation roller 400 are the same as those of the first magnetic separation roller 200. The second magnetic separation roller 300 and the third magnetic separation roller 400 are used to complete the secondary separation of ilmenite.

[0074] A blanking part 140 is installed below the second magnetic separation roller 300 and the third magnetic separation roller 400. The blanking part 140 includes a first material channel 141, a second material channel 142, a third material channel 143, a fourth material channel 144 and a fifth material channel 145. The first material channel 141 is installed directly below the second magnetic separation roller 300, and the second material channel 142 is installed below the side of the second magnetic separation roller 300. The first material channel 141 is used to output iron concentrate powder, and the second material channel 142 is used to output return material.

[0075] A third material channel 143 is installed directly below the third magnetic separation roller 400. A fourth material channel 144 is installed on one side of the third material channel 143 away from the first material channel 141. A fifth material channel 145 is installed on one side of the fourth material channel 144 away from the first material channel 141. The third material channel 143 is used to output ilmenite concentrate. The fourth material channel 144 is used to output recycled material. The fifth material channel 145 is used to output tailings.

[0076] Among them, the recycled material output through the second material channel 142 and the fourth material channel 144 is transferred into the primary hopper 102 for recycling.

[0077] A guiding part 130 is installed between the feeding ports of two adjacent material channels above, which is used to realize the material diversion of materials entering different material channels.

[0078] Among them, the blanking positions corresponding to the second magnetic separation roller 300 and the third magnetic separation roller 400 are located at the top of their respective magnetic regions, and the magnetic region in the third magnetic separation roller 400 is arranged on the side away from the second magnetic separation roller 300.

[0079] As a further explanation of the above embodiment, see Figure 9 , the guiding part 130 includes a mounting seat 131. The mounting seat 131 is installed on the bracket 101. A second rotating shaft 132 is rotatably installed on the mounting seat 131. The fastening bolt 133 is threadedly connected to the nut fixed on the mounting seat 131, and the end of the fastening bolt 133 can abut against the outer surface of the second rotating shaft 132. A second baffle 134 is fixedly installed on the second rotating shaft 132. The second baffle 134 is used for guiding the blanking to facilitate the falling material to fall into the material channel. A third baffle 135 is also fixedly installed on the side of the second rotating shaft 132. The third baffle 135 is used to separate adjacent material channels to prevent the mixing of materials during the falling process.

[0080] An embodiment of the present invention also provides a beneficiation process for preparing ilmenite concentrate from ilmenite ore. See Figure 10 , this beneficiation process uses the above magnetic separation equipment to realize beneficiation, which specifically includes the following steps:

[0081] S1. Preliminarily screen the ilmenite raw ore, remove the tailings and perform dry magnetic separation on the remaining ore to obtain ilmenite ore.

[0082] Since the ore rich in titanium and iron elements in ilmenite is relatively hard and easily accumulates into lumps or clusters, the ilmenite raw ore is first preliminarily screened to separate the powdery and particulate impurities in the original ore, and magnetic separation is performed on the remaining ore to obtain the ore rich in titanium and iron elements, so as to complete the purification of titanium powder and iron powder.

[0083] S2. Use a mill to crush and grind ilmenite ore. After screening, ilmenite powder and some coarse ore that has not been completely ground and crushed are obtained. Transfer the coarse ore to the mill for recycling.

[0084] Use a mill to crush the above ore, separate the ground ore powder through a sizing screen, and repeatedly grind and screen the ore with larger dimensions to meet the subsequent ore dressing requirements.

[0085] S3. Add an appropriate amount of clear water to the ilmenite powder obtained in step S2. After two wet magnetic separations, iron concentrate, tailings, and return material are obtained.

[0086] Add clear water to the ore powder after the above grinding and screening, and perform two wet magnetic separations. In the first wet magnetic separation, the iron concentrate in the ore powder is separated. The remaining ore powder is subjected to the second wet magnetic separation. The second wet magnetic separation divides the remaining ore powder into return material and tailings. The return material contains titanium iron powder and needs further separation.

[0087] S4. Dehydrate the return material obtained in step S3. Collect the liquid in a thickener, and perform water drainage and drying on the solid to obtain return material ore powder.

[0088] Dehydrate the return material and then perform water drainage and drying to remove the moisture in it, obtaining dry return material ore powder, which is convenient for subsequent magnetic separation using the above magnetic separation equipment.

[0089] S5. Use the above magnetic separation equipment to perform magnetic separation on the return material ore powder obtained in step S4 to obtain titanium concentrate, iron concentrate, and tailings.

[0090] Add the above-obtained return material ore powder to the primary hopper 102 of the magnetic separation equipment. After magnetic separation, iron concentrate is output from the first channel 141 of the magnetic separation equipment, titanium concentrate is output from the third channel 143, and tailings are output from the fifth channel 145, thus completing the magnetic separation of titanium concentrate in ilmenite.

[0091] According to the embodiments of the present invention as described above, these embodiments do not describe all the details in detail, nor do they limit the invention to only the specific embodiments. Obviously, according to the above description, many modifications and variations can be made. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the relevant technical field can make good use of the present invention and its modifications based on the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A magnetic separation device for preparing titanium concentrate using ilmenite, characterized in that: include A bracket (101) has two primary hoppers (102) mounted side by side on its top, and a material drop adjustment portion (110) is provided at a material discharge port at the bottom of the primary hopper (102) for adjusting a material drop angle and speed; Two first magnetic separation rollers (200) are respectively located directly below the primary hopper (102), each of the first magnetic separation rollers (200) comprising a hollow shaft (201), a plurality of support plates (202) fixed on the hollow shaft (201), and a magnetic part (210) mounted on the support plate (202), the outer shell of the magnetic part (210) being provided with a roller (204) rotatably mounted on the hollow shaft (201); A secondary hopper (120), which is located below the first magnetic separation roller (200), comprises a first hopper (121) in the middle and two second hoppers (122) distributed symmetrically, and is used to separate iron ore powder from titanium ore powder; A driving unit (500) drives the roller (204) to rotate around the hollow shaft (201) via a belt transmission mechanism; A second magnetic separation roller (300) and a third magnetic separation roller (400) are also provided below the secondary hopper (120), and their structures are the same as those of the first magnetic separation roller (200), and the second magnetic separation roller (300) is located directly below the first hopper (121), and the third magnetic separation roller (400) is located directly below the second hopper (122); A material discharge section (140) is provided below the second magnetic separation roller (300) and the third magnetic separation roller (400), comprising a first material channel (141), a second material channel (142), a third material channel (143), a fourth material channel (144) and a fifth material channel (145), which are respectively used to discharge iron ore concentrate, titanium concentrate, return material and tailings; The magnetic part (210) comprises a magnetically conductive pad (211) and a first magnetic block (213) and a second magnetic block (214) which are arranged at intervals, wherein the first magnetic block (213) is mounted on the magnetically conductive pad (211) via a magnetically insulating pad (212), and the second magnetic block (214) is fixedly mounted on the magnetically conductive pad (211); The magnetization direction of the first magnetic block (213) is parallel to the length direction of the magnetic conductive pad, the magnetization direction of the second magnetic block (214) is perpendicular to the length direction of the magnetic conductive pad, and the same magnetic poles of the first magnetic block (213) and the second magnetic block (214) are close to each other.

2. The magnetic separation equipment for preparing titanium concentrate using ilmenite according to claim 1, characterized in that: An end cover (203) is rotatably mounted on the hollow shaft (201); the end cover (203) is fixed to the roller (204); and the end cover (203) is coaxially fixed to the first pulley (205).

3. The magnetic separation equipment for preparing titanium concentrate using ilmenite according to claim 1, characterized in that: The driving unit (500) comprises a motor (501), the motor (501) being fixed to a bracket (101), the output end of the motor (501) being coaxially fixed to a second pulley (502), and the second pulley (502) being connected to the first pulley (205) via a transmission belt (503).

4. The magnetic separation equipment for preparing titanium concentrate using ilmenite according to claim 1, characterized in that: A lubricating oil passage (206) is provided in the hollow shaft (201), and an oil pipe (207) is fixedly mounted on the end of the hollow shaft (201), wherein the oil pipe (207) is in communication with the lubricating oil passage (206).

5. The magnetic separation equipment for preparing titanium concentrate from ilmenite according to claim 1, characterized in that: The material drop adjustment portion (110) comprises an adjustment ring (111), the adjustment ring (111) being coaxially fixed to a first rotating shaft (112), the first rotating shaft (112) being rotatably mounted on a bracket (101), a first baffle (113) being mounted on the first rotating shaft (112), the first baffle (113) being located at a position where a material discharge port is located at the bottom of the primary hopper (102).

6. The magnetic separation equipment for preparing titanium concentrate from ilmenite according to claim 1, characterized in that: A guide portion (130) is provided between adjacent material channels of the blanking portion (140), the guide portion (130) comprising a mounting seat (131), the mounting seat (131) being mounted on the bracket (101), and a second rotating shaft (132) being rotatably mounted on the mounting seat (131); The fastening bolt (133) is threadedly connected to a nut fixed on the mounting seat (131); the end of the fastening bolt (133) can abut against the second rotating shaft (132); a second baffle (134) is fixedly mounted on the second rotating shaft (132); the second baffle (134) is used to guide the falling material; A third baffle (135) is also fixedly mounted on the side of the second rotating shaft (132), and the third baffle (135) is used to separate adjacent material channels.

7. The magnetic separation equipment for preparing titanium concentrate from ilmenite according to claim 3, characterized in that: The driving unit (500) drives the first pulley (205) to rotate in a direction opposite to a direction in which the material falls from the outer surface of the drum (204).

8. The magnetic separation equipment for preparing titanium concentrate from ilmenite according to claim 1, characterized in that: The magnetic part (210) is a fan-shaped structure and is coaxially arranged with the hollow shaft (201).

9. A beneficiation process for preparing titanium concentrate using ilmenite, characterized in that: The method of using the magnetic separation equipment according to any one of claims 1 to 8 to complete mineral separation comprises the following steps: S1. Preliminarily screening the ilmenite ore, removing the tailings and performing dry magnetic separation on the remaining ore to obtain ilmenite ore; S2, using a mill to crush and grind the ilmenite ore, and after screening, obtain ilmenite ore powder and some incompletely ground coarse ore, and transfer the coarse ore to the mill for recycling; S3, adding an appropriate amount of clean water to the ilmenite powder obtained in step S2, and obtaining iron ore concentrate, tailings and return material after two wet magnetic separations; S4, dehydrating the return material obtained in step S3, collecting the liquid into a thickening tank, draining and drying the solid to obtain return material ore powder; S5. The returned ore powder obtained in step S4 is subjected to magnetic separation using a magnetic separation device to obtain titanium concentrate, iron concentrate and tailings.

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