Dry-type low-intensity magnetic field magnetic separator for grading and screening mineral particles

Abstract

The invention discloses a dry-type low-intensity magnetic field magnetic separator for mineral particle classification screening, and relates to the technical field of ore screening, the dry-type low-intensity magnetic field magnetic separator comprises a roller and a rolling shaft, and further comprises a screening structure arranged on the roller and used for screening magnetic materials and non-magnetic materials; the screening mechanism comprises a rolling shaft, the rolling shaft is arranged in the middle of the roller, a cavity is formed in the rolling shaft, a rotating column penetrates through the middle of the rolling shaft, vibration assemblies are installed at the two ends of the rotating column, an electromagnetic assembly is arranged on the periphery of the roller, and a driving motor is installed on the outer side of the electromagnetic assembly. A belt groove is formed in the outer surface of the top of the grinding shaft, a rotating roller is rotationally connected to the middle of the belt groove through a bearing, an electromagnetic assembly is powered on to form a magnetic field, magnetic materials are adsorbed, materials without the magnetic field can fall off downwards under the influence of gravity, and therefore the ore screening effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of ore screening, in particular to a dry weak magnetic field magnetic separator for grading and screening of mineral particles. Background Art

[0002] Magnetic separators are widely used in resource recovery, mining, kiln and other factories. They are suitable for wet magnetic separation of magnetite, pyrrhotite, roasted ore, ilmenite and other materials with a particle size below 3mm. They are also used for iron removal of coal, non-metallic minerals, building materials and other materials. They are one of the most widely used and versatile machines in the industry.

[0003] When mining some magnetic iron ores, it is necessary to screen the magnetic and non-magnetic materials in the ore. At this time, a magnetic separator is needed. However, when the magnetic separator in the prior art screens the magnetic and non-magnetic materials, some magnetic materials will be coated or bonded to the magnetic materials, causing part of the magnetic materials including the non-magnetic materials to be adsorbed onto the electromagnetic disk or related electromagnetic equipment, resulting in the low purity of the screened ore. Summary of the invention

[0004] The purpose of the present invention is to make up for the deficiencies of the prior art and to provide a dry weak magnetic field magnetic separator for grading and screening mineral particles.

[0005] To achieve the above object, the present invention provides the following technical solution: a dry weak magnetic field magnetic separator for grading and screening mineral particles, comprising a drum and a rolling shaft, and also comprising:

[0006] A screening structure, which is arranged on the drum and is used to screen magnetic materials and non-magnetic materials;

[0007] Among them, the screening mechanism includes a rolling shaft, which is arranged in the middle of the drum, and a cavity is opened inside the rolling shaft. A rotating column passes through the middle of the rolling shaft, and vibration components are installed at both ends of the rotating column. An electromagnetic component is arranged on the periphery of the drum, and a driving motor is installed on the outside of the electromagnetic component. A belt groove is opened on the outer surface of the top of the rolling shaft, and a roller is rotatably connected to the middle of the belt groove through a bearing, and a transmission belt is connected between the belt groove and the output shaft of the driving motor.

[0008] As a preferred solution of the present invention, the vibration assembly includes two groups of centrifugal blocks and several groups of counterweight blocks. The two groups of centrifugal blocks are respectively installed at two ends of the rotating column, and the counterweight blocks are sleeved on the inner walls of the centrifugal blocks.

[0009] As a preferred solution of the present invention, the transmission belt includes transmission belt A, transmission belt B, and transmission belt C. The transmission belt A and transmission belt C are transmission connected to the belt groove and the output shaft of the drive motor, and the transmission belt B is transmission connected to the roller and the output shaft of the drive motor.

[0010] As a preferred solution of the present invention, there is a gap between the rolling shaft and the drum, and the edge above the rolling shaft is inclined downward by 30° toward the inner wall of the drum.

[0011] As a preferred solution of the present invention, the sub-screen holes penetrate from the inner wall of the drum to the outside of the drum and are inclined upward by 60°.

[0012] As a preferred solution of the present invention, the center of the centrifugal block is offset to one side relative to the center of the rotating column, and the bottom end of the rotating column penetrates the rolling shaft and extends to the inner cavity of the cavity.

[0013] As a preferred solution of the present invention, the electromagnetic assembly includes a protective shell and an electromagnetic coil. The protective shell is located on the outer periphery of the drum and has a gap between the protective shell and the drum. The electromagnetic coil is embedded in the protective shell and is spiral-shaped. When the electromagnetic coil is energized, a magnetic field will be formed in the middle.

[0014] As a preferred solution of the present invention, the inner wall of the centrifugal block is made of magnets, the two groups of centrifugal blocks are symmetrical up and down, and the counterweight block is made of iron.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention controls the transmission belt to rotate through the operation of the driving motor. At this time, the belt groove and the output shaft of the driving motor are matched to drive the rolling shaft to rotate through the transmission belt. When the rolling shaft rotates, the ore between the rolling shaft and the roller will be crushed to separate the magnetic material and the non-magnetic material. At this time, the electromagnetic component is energized to form a magnetic field to adsorb the magnetic material, and the material that does not carry the magnetic field will fall downward under the influence of gravity, thereby improving the screening effect of the ore.

[0017] 2. The present invention drives the centrifugal block to rotate through the rotation of the rotating column. When the centrifugal block rotates with the rotating column as the axis, centrifugal force will be generated. When the centrifugal force acts on the rotating column, the rotating column will cause the rolling shaft to vibrate. Through the vibration of the rolling shaft, since there is ore material between the rolling shaft and the roller, the rolling shaft will cause the roller to vibrate with the ore material as the medium when vibrating, thereby vibrating out the ore material blocked inside the sieve hole.

[0018] 3. The present invention tilts the sub-screen holes upward so that when the non-magnetic material enters the sub-screen holes, it will slide back to the inner wall of the drum, and the magnetic material will be attracted by the magnetic field, so that it can pass through the sub-screen holes and be discharged from the outside of the sub-screen holes. By disconnecting the magnetic field, the magnetic material will fall off. At this time, the non-magnetic material will fall off from the gap between the drum and the rolling shaft, and the magnetic material will fall off from between the electromagnetic assembly and the drum, so as to facilitate the separate discharge of the screened materials.

[0019] Other advantages, objectives and features of the present invention will be set forth in part in the following description and, in part, will be apparent to those skilled in the art based on an examination of the following or may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0021] Figure 2 It is a cross-sectional structural schematic diagram of the front side of the present invention;

[0022] Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0023] Figure 4 For the present invention Figure 2 A schematic diagram of the enlarged structure at B in the middle;

[0024] Figure 5 It is a schematic diagram of the disassembly structure of the drum of the present invention.

[0025] In the figure: 1. drum; 2. screening holes; 3. rolling shaft; 4. belt groove; 5. roller; 6. rotating column; 7. vibration assembly; 71. centrifugal block; 72. counterweight; 8. driving motor; 9. transmission belt; 91. transmission belt A; 92. transmission belt B; 93. transmission belt C; 10. electromagnetic assembly; 101. protective shell; 102. electromagnetic coil; 11. cavity. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] like Figure 1-5 As shown, the present invention provides a dry weak magnetic field magnetic separator for grading and screening mineral particles, comprising a drum 1 and a rolling shaft 3, and also comprising:

[0028] A screening structure, which is arranged on the drum 1 and is used to screen the magnetic material and the non-magnetic material;

[0029] Among them, the screening mechanism includes a rolling shaft 3, which is arranged in the middle of the drum 1. A cavity 11 is opened inside the rolling shaft 3. A rotating column 6 passes through the middle of the rolling shaft 3. Vibration components 7 are installed at both ends of the rotating column 6. An electromagnetic component 10 is arranged on the outer periphery of the drum 1. A driving motor 8 is installed on the outer side of the electromagnetic component 10. A belt groove 4 is opened on the outer surface of the top of the rolling shaft 3. A roller 5 is rotatably connected to the middle of the belt groove 4 through a bearing. A transmission belt 9 is connected between the belt groove 4 and the output shaft of the driving motor 8.

[0030] The operation of the driving motor 8 will control the transmission belt 9 to rotate. At this time, the belt groove 4 and the output shaft of the driving motor 8 are coordinated to drive the rolling shaft 3 to rotate through the transmission belt 9. When the rolling shaft 3 rotates, the ore between the rolling shaft 3 and the drum 1 will be crushed. At this time, the electromagnetic component 10 is energized to form a magnetic field to adsorb the magnetic material, and the material that does not carry the magnetic field will fall off under the influence of gravity, thereby improving the screening effect of the ore.

[0031] like Figure 2 , 3 As shown, the vibration assembly 7 includes two groups of centrifugal blocks 71 and a plurality of groups of counterweight blocks 72 . The two groups of centrifugal blocks 71 are respectively installed at two ends of the rotating column 6 , and the counterweight blocks 72 are sleeved on the inner walls of the centrifugal blocks 71 .

[0032] Through the design of the counterweight block 72, the weight of the centrifugal block 71 can be controlled. At the same time, the rotation of the rotating column 6 will drive the centrifugal block 71 to rotate. When the centrifugal block 71 rotates with the rotating column 6 as the axis, centrifugal force will be generated. When the centrifugal force acts on the rotating column 6, the rotating column 6 will cause the rolling shaft 3 to vibrate. Through the vibration of the rolling shaft 3, since there is ore material between the rolling shaft 3 and the drum 1, the rolling shaft 3 will cause the drum 1 to vibrate with the ore material as the medium during vibration, thereby vibrating out the ore material blocked inside the sieve hole 2.

[0033] like Figure 1 , 2 As shown in , 3, the transmission belt 9 includes a transmission belt A91, a transmission belt B92, and a transmission belt C93. The transmission belt A91 and the transmission belt C93 are connected to the belt groove 4 and the output shaft of the driving motor 8, and the transmission belt B92 is connected to the roller 5 and the output shaft of the driving motor 8.

[0034] Through the design of transmission belt A91, transmission belt B92 and transmission belt C93, the rotating column 6 and the rolling shaft 3 can rotate synchronously, and the rotating column 6 can be affected by the centrifugal block 71 to generate centrifugal force and vibrate, so that the vibration of the rotating column 6 can cause the vibration of the rolling shaft 3.

[0035] like Figure 2 As shown, there is a gap between the rolling shaft 3 and the drum 1, and the edge above the rolling shaft 3 is inclined downward by 30° toward the inner wall of the drum 1.

[0036] Through the design of the rolling shaft 3, since the top of the rolling shaft 3 is inclined, the crushed stones that fall on the top of the rolling shaft 3 will gradually move toward the gap between the roller 1 and the rolling shaft 3, so that the ore can be broken up and crushed by the rolling shaft 3 and the roller 1, and the magnetic material and the non-magnetic material can be separated by crushing the ore.

[0037] like Figure 4 As shown, the sub-screen holes 2 penetrate from the inner wall of the drum 1 to the outside of the drum 1 and are inclined upward at 60°.

[0038] Through the design of the sieve holes 2, since the sieve holes 2 are inclined upward, the non-magnetic material will not completely pass through the sieve holes 2 and separate from the drum 1 when squeezed, and the non-magnetic material entering the sieve holes 2 will slide to the inner wall of the drum 1, while the magnetic material will be affected by the magnetic field and adsorbed, so that it can pass through the sieve holes 2 and be discharged from the outside of the sieve holes 2, so that the magnetic material and the non-magnetic material can be sieved.

[0039] like Figure 2 , 3 As shown, the center of the centrifugal block 71 is offset to one side relative to the center of the rotating column 6 , and the bottom end of the rotating column 6 penetrates the rolling shaft 3 and extends to the inner cavity of the cavity 11 .

[0040] Through the design of the centrifugal block 71, when the rotating column 6 rotates, it will be affected by the centrifugal force and generate vibration. At the same time, through the design of the cavity 11, since the rotating column 6 extends to the inside of the cavity 11, when the rotating column 6 vibrates, the rotating column 6 has a certain shaking space, thereby increasing the vibration intensity of the rotating column 6.

[0041] like Figure 2 As shown, the electromagnetic assembly 10 includes a protective shell 101 and an electromagnetic coil 102. The protective shell 101 is located on the outer periphery of the drum 1 and has a gap with the drum 1. The electromagnetic coil 102 is embedded in the protective shell 101. The electromagnetic coil 102 is spiral-shaped. When the electromagnetic coil 102 is energized, a magnetic field will be formed in the middle.

[0042] Through the design of the electromagnetic coil 102, the magnetic material can be adsorbed when the electromagnetic coil 102 is powered on, and the magnetic material will fall off when the electromagnetic coil 102 is powered off, so that the fallen magnetic material can be collected.

[0043] like Figure 2 , 3 As shown, the inner wall of the centrifugal block 71 is made of magnets, the two groups of centrifugal blocks 71 are symmetrical up and down, and the counterweight block 72 is made of iron.

[0044] Through the design of the centrifugal block 71, since the inner wall of the centrifugal block 71 is made of a magnet, the counterweight block 72 can be adsorbed. At the same time, the centrifugal force of the rotating column 6 can be controlled by controlling the number of the counterweight blocks 72, thereby controlling the vibration intensity of the rotating column 6.

[0045] Working principle:

[0046] First, when the ore is put into the inner cavity of the drum 1, it will slide towards the gap between the rolling shaft 3 and the drum 1, and then the drive motor 8 is started, and the drive motor 8 will control the transmission belt 9 to rotate. At this time, through the cooperation between the belt groove 4 and the output shaft of the drive motor 8, the rolling shaft 3 and the rotating column 6 can be driven by the transmission belt 9 to rotate. When the rolling shaft 3 rotates, the ore between the rolling shaft 3 and the drum 1 will be crushed and crushed to separate the magnetic material and the non-magnetic material. Then, the protective shell 101 is energized to form a magnetic field. At this time, the magnetic material will pass through and be adsorbed by the electromagnetic coil 102, and the material without the magnetic field will fall off under the influence of gravity. At the same time, the rotation of the rotating column 6 will drive the centrifugal block 71 to rotate. When the centrifugal block 71 rotates with the rotating column 6 as the axis, Centrifugal force will be generated. When the centrifugal force acts on the rotating column 6, the rotating column 6 will cause the rolling shaft 3 to vibrate. Through the vibration of the rolling shaft 3, since there is ore material between the rolling shaft 3 and the roller 1, the rolling shaft 3 will cause the roller 1 to vibrate with the ore material as the medium when vibrating, so that the ore material blocked inside the sieve hole 2 can be vibrated out. When vibration sources are placed at both ends of an object, it is generally not possible to completely eliminate the vibration, but a balanced vibration effect is achieved. This balance can be understood as the forces of the two vibration sources offsetting or restricting each other, so that the overall vibration of the object is alleviated to a certain extent but the vibration cannot be completely eliminated. For example, in some mechanical structures, the amplitude of the vibration can be reduced by setting symmetrical vibration sources at both ends, but the vibration may still exist.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dry weak magnetic field magnetic separator for grading and screening mineral particles, comprising a drum and a rolling shaft, characterized in that: Also includes: A screening structure, which is arranged on the drum and is used to screen magnetic materials and non-magnetic materials; Among them, the screening mechanism includes a rolling shaft, which is arranged in the middle of the drum, and a cavity is opened inside the rolling shaft. A rotating column passes through the middle of the rolling shaft, and vibration components are installed at both ends of the rotating column. An electromagnetic component is arranged on the periphery of the drum, and a driving motor is installed on the outside of the electromagnetic component. A belt groove is opened on the outer surface of the top of the rolling shaft, and a roller is rotatably connected to the middle of the belt groove through a bearing, and a transmission belt is connected between the belt groove and the output shaft of the driving motor.

2. A dry weak magnetic field magnetic separator for grading and screening mineral particles according to claim 1, characterized in that: The vibration assembly comprises two groups of centrifugal blocks and a plurality of groups of counterweight blocks. The two groups of centrifugal blocks are respectively installed at two ends of the rotating column, and the counterweight blocks are sleeved on the inner walls of the centrifugal blocks.

3. A dry weak magnetic field magnetic separator for grading and screening mineral particles according to claim 1, characterized in that: The transmission belts include a transmission belt A, a transmission belt B, and a transmission belt C. The transmission belts A and C are transmission-connected to the belt groove and the output shaft of the driving motor, and the transmission belt B is transmission-connected to the rotating roller and the output shaft of the driving motor.

4. A dry weak magnetic field magnetic separator for grading and screening mineral particles according to claim 1, characterized in that: There is a gap between the rolling shaft and the roller, and the edge above the rolling shaft is inclined downward by 30° toward the inner wall of the roller.

5. A dry weak magnetic field magnetic separator for grading and screening mineral particles according to claim 1, characterized in that: The sub-screen holes penetrate from the inner wall of the drum to the outside of the drum and are inclined upward by 60°.

6. A dry weak magnetic field magnetic separator for grading and screening mineral particles according to claim 2, characterized in that: The center of the centrifugal block is offset to one side compared with the center of the rotating column, and the bottom end of the rotating column penetrates the rolling shaft and extends to the inner cavity of the cavity.

7. A dry weak magnetic field magnetic separator for grading and screening mineral particles according to claim 1, characterized in that: The electromagnetic assembly includes a protective shell and an electromagnetic coil. The protective shell is located on the outer periphery of the drum and has a gap between the protective shell and the drum. The electromagnetic coil is embedded in the protective shell and is spiral-shaped. When the electromagnetic coil is energized, a magnetic field is formed in the middle.

8. A dry weak magnetic field magnetic separator for grading and screening mineral particles according to claim 2, characterized in that: The inner wall of the centrifugal block is made of magnets, the two groups of centrifugal blocks are symmetrical up and down, and the counterweight block is made of iron.

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