A double-drum dry magnetic separator with sorting and magnetic separation functions

Abstract

The present invention discloses a double-drum dry magnetic separator with sorting and magnetic separation functions, including an inner roller and an outer roller. The inner roller is arranged in the middle and upper part of the outer roller, and its core shaft is installed on the frame. The inner roller is installed on the core shaft through a bearing; the outer roller is driven by the outer roller transmission gear pair, and the inner roller is driven by the inner roller transmission gear pair; one end face of the outer roller is provided with a feeding trough, and the inner wall of the outer roller is provided with a guide plate, and the guide plate is arranged in a spiral line along the cylinder wall; a fixed magnetic system is provided near the upper half of the inner wall of the inner roller. A concentrate belt is arranged inside the outer roller and in the middle and lower part of the inner roller, and a baffle plate is provided on the upper side of the concentrate belt. The structure is simple and reasonable, and qualified magnetic concentrate can be collected in advance to avoid the circulation of magnetic minerals in the roller and affect the sorting efficiency.

Description

Technical Field

[0001] The invention relates to dry magnetic separation equipment, in particular to a double-drum dry magnetic separator with separation and magnetic separation functions. Background Art

[0002] Magnetic separation equipment is a device that uses the different magnetic properties of minerals to complete the sorting operation. When the minerals pass through the magnetic field, the magnetic force difference acting on these minerals is used to complete the sorting. Magnetic separation equipment can be divided into two categories according to the form of magnetic source: electromagnetic and permanent magnet. According to different operation methods, there are two types: dry and wet. According to the structural characteristics, it can be divided into belt type, drum type, column type, disc type and other categories. When the dry sorting system composed of magnetic rollers is working, the sorted materials are transported into the magnetic field area with the belt, and separation occurs under the action of the magnetic field. Strong magnetic ores or ores with high magnetic iron content are adsorbed or attracted on the surface of the magnetic roller belt due to the strong magnetic force, and are discharged as concentrates with the operation of the roller belt. The waste rock is directly thrown out due to the inertia of the movement and enters the tailings, thereby realizing the separation of magnetic and non-magnetic materials, thereby achieving the purpose of sorting. Drum magnetic separators are mainly used for the sorting and recovery of ferrous metal minerals, and are also used in iron removal operations in coal, steel slag, refractory materials and other industries. Magnetic rollers are usually used as driving rollers of belt conveyors, and together with belt conveyors, separation boxes, etc., form a dry sorting system.

[0003] Common dry permanent magnetic drum magnetic separators are mainly composed of four parts: a cylinder, a magnetic system, a tank body, and a transmission part. The cylinder is usually welded with 2-3 mm stainless steel plates, and the end cover is a cast aluminum part or a workpiece, which is connected to the cylinder with stainless steel screws. The motor drives the cylinder to rotate through a reducer or directly with a stepless speed regulating motor. The magnetic system is an open magnetic system and is installed in the cylinder. The magnetic block is installed on the bottom plate of the yoke with stainless steel bolts. The shaft of the yoke extends out of the cylinder, and a crank arm is fixed at the end of the shaft. The magnetic system deflection angle can be adjusted by turning the crank arm, and it can be fixed with a pull rod after adjustment. The working area of ​​the tank body is made of stainless steel plate, and the frame and other parts of the tank body are welded with ordinary steel. During the operation of the dry single-drum magnetic separator, the magnetic minerals close to the roller are subject to a large magnetic field force and are easily adsorbed, while the magnetic materials far away from the roller are subject to a small magnetic field force, and are easily blocked by non-magnetic minerals and enter non-magnetic minerals, resulting in a decrease in recovery rate.

[0004] A double-layer electromagnetic separator is disclosed in a Chinese patent with the announcement number CN202021981423.3, which was announced on June 1, 2021. The separator is designed with a box, a first electromagnetic roller and a second electromagnetic roller, the first electromagnetic roller and the second electromagnetic roller are parallel, and the first electromagnetic roller is arranged above the second electromagnetic roller.

[0005] The Chinese patent with announcement number CN201811349230.3, published on January 29, 2019, discloses a double-drum mining magnetic separator, including a base frame, a first gear, a drum, a rotating shaft and a concentrate tank.

[0006] The Chinese patent with announcement number CN201620571876.6, published on January 18, 2017, discloses a double-drum wet magnetic separator, including a base, a driving device and a magnetic separation device.

[0007] In the above-mentioned prior art, although many double-drum magnetic separators have been disclosed, the above double-drum magnetic separators are mostly realized by changing the position between the drums, and the concentrate collection process mostly occurs outside the drum of the magnetic roller. The sorting process is a wet operation, and the sorting efficiency is low and cannot meet the needs of industrial production.

[0008] In view of this, the present invention is proposed. Summary of the invention

[0009] The purpose of the present invention is to provide a double-drum dry magnetic separator with sorting and magnetic separation functions to solve the problem in the prior art that the double-drum magnetic rollers have low sorting efficiency during dry sorting and cannot meet industrial production needs.

[0010] The objective of the present invention is achieved through the following technical solutions:

[0011] The double-drum dry magnetic separator with sorting and magnetic separation functions of the present invention is characterized in that it comprises an inner roller 2 and an outer roller 9, wherein the outer roller 9 is supported by a support system, the inner roller 2 is arranged in the middle and upper part of the outer roller 9, and its core shaft 17 is installed on a frame 15, and the inner roller 2 is installed on the core shaft 17 through a bearing;

[0012] The outer roller 9 is driven by an outer roller transmission gear pair, and the inner roller 2 is driven by an inner roller transmission gear pair;

[0013] One end surface of the outer roller 9 is provided with a feeding trough 10, and the inner wall of the outer roller 9 is provided with a material guide plate 12, and the material guide plate 12 is arranged in a spiral line along the roller wall;

[0014] A fixed magnetic system 3 is provided near the upper half of the inner wall of the inner roller 2;

[0015] A fine material belt 6 is arranged inside the outer roller and at a lower middle portion of the inner roller 2 , and a baffle plate 7 is provided on an upper side of the fine material belt 6 .

[0016] Compared with the prior art, the double-drum dry magnetic separator provided by the present invention has the functions of sorting and magnetic separation. After the raw materials enter the outer roller, they move in a spiral shape under the action of the guide plate arranged on the inner wall of the outer roller; under the lifting action of the outer roller, they rotate with the outer roller. During its free fall, the magnetic materials are affected by the fixed magnetic system in the inner roller and fall onto the concentrate belt; while the non-magnetic materials are not affected by the fixed magnetic system and enter the tailings tank, thus completing the sorting operation. A concentrate belt is designed inside the magnetic separator to collect qualified magnetic concentrate in advance, avoiding the circulation of magnetic minerals in the roller and affecting the sorting efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of a double-drum dry magnetic separator with sorting and magnetic separation functions provided in an embodiment of the present invention;

[0018] Figure 2 It is a structural arrangement diagram of a double-drum dry magnetic separator in an embodiment of the present invention;

[0019] Figure 3 Schematic diagram of the outer roller transmission of the double-drum dry magnetic separator in the embodiment of the present invention;

[0020] Figure 4 A schematic diagram of the inner drum separation structure of a double-drum dry magnetic separator according to an embodiment of the present invention;

[0021] In the figure:

[0022] 1. Raw materials, 2. Inner roller, 3. Fixed magnetic system, 4. Non-magnetic material, 5. Magnetic material, 6. Refining belt, 7. Baffle plate, 8. Tailing material, 9. Outer roller, 10. Feed trough, 11. Outer cylinder transmission gear, 12. Guide plate, 13. Support roller, 14. Outer cylinder transmission gear, 15. Frame, 16. Permanent magnetic block, 17. Mandrel, 18. Motor 1, 19. Reducer 1, 21. Inner cylinder transmission shaft, 24. Motor 2, 25. Reducer 2, 26. Outer cylinder rotation direction, 27. Blowing pipe. DETAILED DESCRIPTION

[0023] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, not all of the embodiments, which does not constitute a limitation of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the present invention.

[0024] First, the terms that may be used in this article are explained as follows:

[0025] The term “and / or” means that either or both of them can be realized at the same time. For example, X and / or Y means both “X” or “Y” and “X and Y”.

[0026] The terms "include", "comprises", "contains", "has" or other descriptions with similar semantics should be interpreted as non-exclusive inclusion. For example, including certain technical feature elements (such as raw materials, components, ingredients, carriers, dosage forms, materials, dimensions, parts, components, mechanisms, devices, steps, procedures, methods, reaction conditions, processing conditions, parameters, algorithms, signals, data, products or products, etc.) should be interpreted as including not only certain technical feature elements explicitly listed, but also other technical feature elements known in the art that are not explicitly listed.

[0027] The term "consisting of..." means excluding any technical feature elements not explicitly listed. If this term is used in a claim, it will make the claim closed, so that it does not contain technical feature elements other than the technical feature elements explicitly listed, except for the conventional impurities related to them. If this term only appears in a clause of a claim, it only limits the elements explicitly listed in the clause, and the elements recorded in other clauses are not excluded from the overall claim.

[0028] Unless otherwise specified or limited, the terms "installed", "connected", "connected", "fixed" and the like 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 a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this article can be understood according to specific circumstances.

[0029] The orientation or position relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the drawings and are only for the convenience and simplification of description, and do not explicitly or implicitly indicate that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation of this document.

[0030] The contents not described in detail in the examples of the present invention belong to the prior art known to professionals in the field. If no specific conditions are specified in the examples of the present invention, the conditions are carried out according to the conventional conditions in the field or the conditions recommended by the manufacturer. If the manufacturer is not specified in the reagents or instruments used in the examples of the present invention, they are all conventional products that can be purchased commercially.

[0031] The double-drum dry magnetic separator with sorting and magnetic separation functions of the present invention comprises an inner roller 2 and an outer roller 9, wherein the outer roller 9 is supported by a support system, the inner roller 2 is arranged in the middle and upper part of the outer roller 9, and its core shaft 17 is installed on a frame 15, and the inner roller 2 is installed on the core shaft 17 through a bearing;

[0032] The outer roller 9 is driven by an outer roller transmission gear pair, and the inner roller 2 is driven by an inner roller transmission gear pair;

[0033] One end surface of the outer roller 9 is provided with a feeding trough 10, and the inner wall of the outer roller 9 is provided with a material guide plate 12, and the material guide plate 12 is arranged in a spiral line along the roller wall;

[0034] A fixed magnetic system 3 is provided near the upper half of the inner wall of the inner roller 2;

[0035] A fine material belt 6 is arranged inside the outer roller and at a lower middle portion of the inner roller 2 , and a baffle plate 7 is provided on an upper side of the fine material belt 6 .

[0036] The outer roller 9 rotates clockwise around its center, and the inner roller 2 rotates clockwise around its core shaft 17. The core shaft 17 and the fixed magnetic system 3 do not move during the operation.

[0037] The support system comprises a set of support rollers 13 , which are mounted on a frame 15 .

[0038] The outer roller transmission gear pair is composed of a motor 18, a reducer 19, an outer roller transmission pinion 14 and an outer cylinder transmission gear 11.

[0039] The inner roller transmission gear pair is composed of a second motor 24 , a second reducer 25 , and an inner roller transmission shaft 21 .

[0040] The fixed magnetic system 3 includes a permanent magnetic block 16 fixed on a core shaft 17, and the polarities of the magnetic poles are arranged alternately in NSNS.

[0041] A blowing pipe 27 is provided in the upper middle part of the outer roller 9 and above the inner roller 2 .

[0042] The number of air outlets of the blowing pipe 27 is 20 to 40.

[0043] The inner roller 2, the outer roller 9 and the baffle plate 7 are made of stainless steel, and the blowing pipe 27 is made of air pipe material.

[0044] The rotation speed of the inner roller 2 is 1 / 3 to 1 / 2 of the rotation speed of the outer roller 9. The inner roller 2 and the outer roller 9 have the same rotation direction. The rotation speed of the outer roller 9 is less than 30 rpm.

[0045] The distance between the fixed magnetic system 3 and the wall of the inner roller 2 is adjusted as needed;

[0046] The wind pressure of the blowing pipe 27 is controlled within 10Mpa, and the wind outlet is discontinuous, and is set to 1s to 2s pulse wind outlet;

[0047] The working deflection angle of the baffle plate 7 is adjusted according to the sorting requirements.

[0048] From the above, it can be seen that the double-drum dry magnetic separator with sorting and magnetic separation functions of the embodiment of the present invention has a fixed magnetic system arranged on the inner roller, the outer drum of the outer roller is driven by a motor, a reducer and a gear pair to rotate, and the inner roller is driven by a motor and a reducer to rotate, and the two rotate in the same direction. After the raw material enters the outer roller, it moves in a spiral shape under the action of the guide plate arranged on the inner wall of the outer roller; under the lifting action of the outer roller, it rotates with the outer roller. During its free fall, the magnetic material is affected by the fixed magnetic system in the inner roller and falls onto the fine material belt; while the non-magnetic material is not affected by the fixed magnetic system and enters the tailings tank, thereby completing the sorting operation. A fine material belt is designed inside the magnetic separator to collect qualified magnetic concentrate in advance to avoid the circulation of magnetic minerals in the roller and affect the sorting efficiency.

[0049] In order to more clearly demonstrate the technical solution and technical effects provided by the present invention, the embodiments of the present invention are described in detail with specific embodiments below.

[0050] Example 1

[0051] like Figures 1 to 4 As shown:

[0052] The double-drum dry magnetic separator is composed of an inner roller 2, a fixed magnetic system 3, a fine material belt 6, a material baffle plate 7, an outer roller 9, a feed trough 10, an inner drum transmission gear pair, an outer drum transmission gear pair and the like.

[0053] The outer roller 9 is made of stainless steel and is driven by a transmission gear pair to rotate. The motor 18 drives the transmission pinion 14 to rotate through a reducer 19. The transmission pinion 14 and the outer cylinder transmission gear 11 constitute a transmission gear pair. The outer roller 9 is supported by a support system, which is composed of a group of support rollers 13. The support rollers 13 are installed on the equipment foundation. A guide plate is installed in the outer roller, and the guide plate is arranged in a spiral line along the cylinder wall.

[0054] The inner roller 2 is made of stainless steel and arranged in the middle and upper part of the outer roller 9. Its mandrel 17 is installed on the frame 15, and the inner roller 2 is installed on the mandrel 17 through a bearing. The fixed magnetic system 3 is installed on the mandrel 17. The inner roller is installed with an inner cylinder transmission shaft 21, and the inner cylinder transmission shaft 21 is connected to the reducer 25 through a coupling. The motor 24 transmits power to the inner cylinder transmission shaft 21 through the reducer 25. When working, the inner roller rotates in the same way as the outer roller, and rotates clockwise.

[0055] The specific working process is as follows:

[0056] The motor 18 drives the outer roller 9 to rotate clockwise around its center through the reducer 19 and the outer cylinder gear pair.

[0057] The second motor 24 drives the inner roller 2 to rotate clockwise around its core shaft 17 through the second reducer 25 and the inner roller transmission shaft 21.

[0058] In order to facilitate the distribution of materials, the outer roller speed is set to be less than 30 rpm. The raw material 1 enters the outer roller 9 from the feed trough 10 and rotates with the outer roller 9.

[0059] Under the action of the rotation of the guide plate 12 and the outer roller, the raw material 1 will be lifted to a certain height and fall onto the outer cylinder of the inner roller 2 under the action of gravity.

[0060] The fixed magnetic system 3 is fixed on the core shaft 17 of the inner roller 2. The core shaft is a fixed shaft and does not move with the outer roller. The fixed magnetic system 3 is composed of permanent magnetic blocks, and the magnetic poles are arranged according to NSNS.

[0061] The magnetic material 5 in the raw material 1 falls onto the inner roller 2, and is adsorbed on the wall of the inner roller 2 by the magnetic field force of the fixed magnetic system 3, and rotates with the inner roller 2. When the inner roller 2 moves to position B, the magnetic field force cannot overcome the gravity and falls onto the fine material belt 6.

[0062] The non-magnetic material 4 in the raw material 1 is not affected by the magnetic field force. Under the action of centrifugal force and gravity, it falls onto the inner wall of the outer roller and is discharged from the tailings outlet at the bottom of the outer roller.

[0063] The refined material belt 6 is arranged inside the outer roller and is located in the middle and lower part. When the magnetic material 5 falls onto the refined material belt 6, it is transported to the refined material bin to complete the enrichment of the product.

[0064] The blowing pipe 27 is arranged at the middle and upper part of the outer roller, the wind pressure is controlled within 10Mpa, and the wind is set to 1s-2s pulse wind. Under the action of high pressure wind, the magnetic agglomerated materials can be opened to improve the efficiency of magnetic separation operation.

[0065] In the process from the feeding end to the discharging end, the raw material 1 undergoes multiple lifting, magnetic separation and air separation processes. During the lifting process of the material, the influence of magnetic agglomeration on the magnetic separation process can be overcome to a certain extent; in addition, the number of material separations is increased, thereby improving the separation efficiency of the equipment and reducing the depletion rate of the product.

[0066] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims. The information disclosed in the background technology section of this article is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as an admission or in any form that the information constitutes prior art known to those skilled in the art.

Claims

1. A double-drum dry magnetic separator with sorting and magnetic separation functions, characterized in that: It comprises an inner roller (2) and an outer roller (9), wherein the outer roller (9) is supported by a support system, the inner roller (2) is arranged in the middle and upper part of the outer roller (9), the mandrel (17) of the inner roller (2) is mounted on a frame (15), and the inner roller (2) is mounted on the mandrel (17) via a bearing; The outer roller (9) is driven by an outer roller transmission gear pair, and the inner roller (2) is driven by an inner roller transmission gear pair; A material feeding trough (10) is provided on one end surface of the outer roller (9), and a material guide plate (12) is installed on the inner wall of the outer roller (9), and the material guide plate (12) is arranged in a spiral line along the roller wall; A fixed magnetic system (3) is provided near the upper half of the inner wall of the inner roller (2); A fine material belt (6) is arranged inside the outer roller and at the lower middle part of the inner roller (2), and a baffle plate (7) is provided on the upper side of the fine material belt (6).

2. The double-drum dry magnetic separator with separation and magnetic separation functions according to claim 1, characterized in that: The outer roller (9) rotates clockwise around its center, and the inner roller (2) rotates clockwise around its core shaft (17). The core shaft (17) and the fixed magnetic system (3) do not move during the operation.

3. The double-drum dry magnetic separator with separation and magnetic separation functions according to claim 2, characterized in that: The support system comprises a group of support rollers (13), and the support rollers (13) are mounted on a frame (15).

4. The double-drum dry magnetic separator with separation and magnetic separation functions according to claim 3 is characterized in that: The outer roller transmission gear pair is composed of a motor (18), a reducer (19), an outer roller transmission pinion (14) and an outer cylinder transmission gear (11).

5. The double-drum dry magnetic separator with separation and magnetic separation functions according to claim 4, characterized in that: The inner roller transmission gear pair is composed of a second motor (24), a second reducer (25), and an inner roller transmission shaft (21).

6. The double-drum dry magnetic separator with separation and magnetic separation functions according to claim 5, characterized in that: The fixed magnetic system (3) comprises a permanent magnetic block (16) fixed on a core shaft (17), and the polarities of the magnetic poles are arranged alternately in NSNS order.

7. The double-drum dry magnetic separator with separation and magnetic separation functions according to claim 6, characterized in that: A blowing pipe (27) is provided at the upper middle portion of the outer roller (9) and above the inner roller (2).

8. The double-drum dry magnetic separator with separation and magnetic separation functions according to claim 7, characterized in that: The number of air outlets of the blowing pipe (27) is 20 to 40.

9. The double-drum dry magnetic separator with separation and magnetic separation functions according to claim 8, characterized in that: The inner roller (2), the outer roller (9) and the material blocking plate (7) are made of stainless steel, and the blowing pipe (27) is made of air pipe material.

10. The double-drum dry magnetic separator with separation and magnetic separation functions according to claim 9, characterized in that: The rotation speed of the inner roller (2) is 1 / 3 to 1 / 2 of the rotation speed of the outer roller (9), the inner roller (2) and the outer roller (9) rotate in the same direction, and the rotation speed of the outer roller (9) is less than 30 rpm; The distance between the fixed magnetic system (3) and the wall of the inner roller (2) is adjusted as required; The wind pressure of the blowing pipe (27) is controlled within 10Mpa, and the wind outlet is discontinuous, and is set to 1s to 2s pulse wind outlet; The working deflection angle of the baffle plate (7) is adjusted according to the sorting requirements.

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