Biphase rotating eccentric wet magnetic separator and method

Abstract

The invention discloses a double-phase rotation eccentric wet magnetic separator and method, the double-phase rotation eccentric wet magnetic separator comprises a double-phase magnetic separation mechanism, the double-phase magnetic separation mechanism comprises a cylinder and a magnetic system eccentrically arranged in the cylinder, the magnetic wrap angle of the magnetic system is 360 degrees, the axis of the magnetic system is parallel to the axis of the cylinder, the magnetic system forms a magnetic field intensity position and a magnetic field low position on the cylinder, and the magnetic field intensity position and the magnetic field low position are parallel to each other; the magnetic system and the cylinder body are independently and rotationally arranged; the whole groove body is of a symmetrical structure, the groove body is arranged on the outer side of the bottom of the double-phase magnetic separation mechanism, a gap is formed between the groove body and the cylinder body, a grading belt is formed, one side of the groove body is an ore feeding area, the other side of the groove body is an ore unloading area, a tailing outlet and a middling outlet are formed in the groove body, and the tailing outlet and the middling outlet are symmetrically distributed; the ore feeding box and the ore unloading box are symmetrically distributed on the two sides of the groove body, the ore feeding box is arranged in an ore feeding area, and the ore unloading box is arranged in an ore unloading area. A full-wrap-angle magnetic system, a double-phase rotation mode and a symmetrical groove body structure are adopted to achieve separation of three grades.

Description

Technical Field

[0001] The invention belongs to mineral magnetic separation technology and is a two-phase rotational eccentric wet magnetic separator. Background Art

[0002] Magnetic separators are widely used in metal mine iron separation, non-metallic iron removal and other industries. As a type of magnetic separator, the two-phase rotary eccentric magnetic separator is specially used to separate different minerals. It is a wet magnetic separation equipment that can obtain the best mineral processing process indicators through parameter adjustment.

[0003] Current problems with wet magnetic separators:

[0004] 1. Low concentrate grade

[0005] There are three types of trough forms of traditional magnetic separators (existing technology), such as CN200710307237.4, CN201110252747.2, and CN201721055466.7. The trough forms are still downstream, countercurrent, and semi-countercurrent. Once one of them is selected, it cannot be changed later. As a result, if the properties of the material change during the mining process, the equipment cannot adapt well to the material characteristics, resulting in reduced separation effect.

[0006] At the same time, the three types of tanks can only produce two products, concentrate and tailings. This results in either more magnetic iron in the tailings or more ore with low magnetic susceptibility in the concentrate. This is inevitable, and the indicators will become a "seesaw";

[0007] 2. Design constraints of magnetic separation magnetic system

[0008] The magnetic system of conventional wet magnetic separators is semi-magnetic, and the magnetic wrap angle is generally between 120° and 140°. The uneven distribution of the magnetic system leads to uneven distribution of the magnetic field strength. (Combined with the tank design), the separation zone is limited, the number of material turnovers is limited, slag inclusion is prone to occur, and the slag inclusion problem in the concentrate cannot be effectively controlled.

[0009] 3. Magnetic separation structure constraints

[0010] The magnetic system of the traditional magnetic separator (existing technology) is fixed, and the direction and speed of the drum are fixed and cannot be adjusted. In this way, once the properties of the material change and are different from those in the design and experiment, the separation effect will be poor. The greater the deviation between the material properties (material particle size, processing capacity, concentration, specific magnetic susceptibility, associated bodies, etc.) and the material properties in the experiment, the worse the separation effect will be.

[0011] At the same time, the magnetic field curve changes fixedly (fixed once the design is completed). The magnetic field curve is fixed, and the selection effect is good only for materials with very small characteristic range. The selection effect for other material characteristics will not be very good. At the same time, when the material characteristics change, the effect will be poor.

[0012] 4. Slot structure constraints

[0013] There are only three types of cell forms in traditional magnetic separators (existing technology), which are still downstream, countercurrent and semi-countercurrent types. The direction of the cylinder cannot be changed after the design is determined. Summary of the invention

[0014] The technical problem to be solved by the present invention is: how to solve the problem of low concentrate grade and high magnetic iron content in tailings, while the trough structure and magnetic separation structure have great design limitations and cannot adapt to changes in material properties.

[0015] In order to solve the above technical problems, the inventors have obtained the technical solution of the present invention through practice and summary. The present invention adopts the following technical solution:

[0016] A two-phase rotational eccentric wet magnetic separator, comprising:

[0017] The two-phase magnetic separation mechanism includes a cylinder and a magnetic system eccentrically arranged in the cylinder. The magnetic wrap angle of the magnetic system is 360°. The axis of the magnetic system is arranged parallel to the axis of the cylinder. The magnetic system forms a high magnetic field position and a low magnetic field position on the cylinder, and the magnetic system and the cylinder are both independently rotated.

[0018] The tank body is a symmetrical structure as a whole. The tank body is arranged outside the bottom of the two-phase magnetic separation mechanism. A gap is set between the tank body and the cylinder body to form a separation belt. One side of the tank body is the ore feeding area and the other side is the ore unloading area. The tank body is provided with a tailings outlet and a middling outlet, and the tailings outlet and the middling outlet are symmetrically distributed.

[0019] The ore feeding box and the ore unloading box are symmetrically distributed on both sides of the trough body. The ore feeding box is arranged in the ore feeding area, and the ore unloading box is arranged in the ore unloading area.

[0020] Preferably, the tank body comprises:

[0021] Upper arc plates, two groups of upper arc plates are symmetrically arranged, and the tops of the upper arc plates are all provided with ore unloading plates arranged outward and obliquely downward;

[0022] Liquid level arc plate, the liquid level arc plate is arranged at the bottom of the cylinder, and closing plates arranged inward and downward are arranged at both ends of the liquid level arc plate, and a gap is reserved between the end of the liquid level arc plate and the upper arc plate, and the gap is used to discharge the corresponding material;

[0023] Outlet regulating plates, two groups of which are symmetrically arranged, are installed at the bottom of the upper arc plate to adjust the size of the opening between the upper arc plate and the liquid level arc plate;

[0024] External arc plates, two groups of external arc plates are symmetrically arranged, the top of the external arc plate is installed on the bottom of the unloading plate, and the top is installed on the bottom of the closing plate;

[0025] Among them, the tailings outlet and the middling ore outlet are respectively arranged at the bottom of the corresponding external arc plate, and the axis of the upper arc plate and the liquid level arc plate coincides with the axis of the cylinder.

[0026] In a preferred embodiment, the bottom of the ore feeding box close to the cylinder is provided with an ore feeding opening obliquely downward;

[0027] A secondary feeding arc plate is arranged at the bottom of the ore feeding port, the bottom of the secondary feeding arc plate extends into the tank body, and a supporting plate is arranged on the back of the secondary feeding arc plate.

[0028] In a preferred solution, the feed port is a conical structure, and the feed port is arranged toward the upper side of the strong magnetic field position on the cylinder;

[0029] A flushing water pipe is installed at the outlet regulating plate.

[0030] Preferably, the ore unloading box comprises a top arc plate and a collecting frame, the top arc plate is provided with an ore unloading water pipe and is placed on the upper side of the ore unloading area of ​​the trough body, and the collecting frame is arranged on the lower side of the ore unloading plate in the ore unloading area.

[0031] In a preferred embodiment, the cylinder comprises a roller and an end cover, the end cover is mounted on the end of the cylinder by bolts, the transmission sleeve is mounted on the end cover, and the transmission sleeve is mounted with a transmission sprocket and a bearing seat, and the bearing seat is mounted with a large bearing mounted on the outside of the transmission sleeve and a small bearing mounted on the inside of the transmission sleeve;

[0032] A main shaft is eccentrically installed in the transmission sleeve through a small bearing, and the rotation center of the main shaft is its own axis center, the rotation center of the transmission sleeve is its own axis center, the magnetic system is installed on the main shaft, and a transmission pair of wheels is installed on the main shaft;

[0033] The transmission wheel pair and the transmission sprocket are respectively equipped with a power source.

[0034] In a preferred embodiment, the magnetic system includes a fixing ring, a yoke and a magnetic group. The fixing ring and the main shaft are connected by key fitting. The yoke is installed on the fixing ring through ribs and support plates. The magnetic group is installed on the yoke through stainless steel bolts and stainless steel tape. A tape fixing plate is installed on the yoke, and the stainless steel tape is fixed to the tape fixing plate through stainless steel screws.

[0035] A method for using a two-phase rotational eccentric wet magnetic separator, the steps are as follows:

[0036] Step 1, feed the mine

[0037] After the normal installation and commissioning of the equipment is completed, the ore is fed from the feeding port on the feeding box to the cylinder. The ore and the cylinder have the same direction. The ore enters the downstream area and is fed again through the secondary feeding arc plate. The ore is accelerated by gravity and has a larger flow rate in the downstream area, so the ore will impact the cylinder.

[0038] Step 2, Magnetic Suction

[0039] The magnetic field formed by the internal magnetic system, and the gap between the magnetic system and the cylinder is small, the field strength is high, the magnetic substances in the ore are adsorbed on the cylinder, the cylinder rotates clockwise, the magnetic system rotates counterclockwise, and the ore follows the rotating cylinder through the downstream area to the separation area;

[0040] Step 3, Preliminary Selection

[0041] At the downstream material and outlet adjustment plate B, disturbance flow is generated to lightly clean the adsorbed ore for the first time. With the reversal of the magnetic pole, the magnetic materials adsorbed on the outside of the ore and the minerals with smaller magnetic susceptibility and non-magnetic minerals in the magnetic agglomeration slag are reversed, and the minerals with smaller magnetic susceptibility and non-magnetic minerals are initially washed away, and the minerals with larger magnetic susceptibility are better brought closer to the cylinder and adsorbed more firmly.

[0042] Step 4: Tailings discharge

[0043] The initially washed minerals flow into the tailings outlet through the opening at the opening adjustment plate B and become tailings. The minerals adsorbed on the cylinder run through the cylinder and come to the bottom of the tank.

[0044] Step 5: Discharge of middlings

[0045] The ore pulp is turned over and washed at the bottom of the tank. The magnetic agglomeration is opened and the minerals with different magnetic susceptibility are subjected to different magnetic forces in the ore pulp. The minerals with smaller magnetic susceptibility and non-magnetic minerals move further to the outside of the material, away from the cylinder, and are washed to the opening adjustment plate A along with the cylinder or the ore pulp, and flow into the middle ore outlet to become middle ore.

[0046] Step 6: Unloading of concentrate

[0047] With sufficient washing at the bottom of the tank and the opening and closing of the magnetic agglomeration, only the strongly magnetic minerals will remain adsorbed on the cylinder, and then enter the unloading area through the rotation of the cylinder, and then be washed and unloaded through the unloading water pipe, and the concentrate will enter the concentrate box.

[0048] Compared with the prior art, the present invention has the following beneficial effects:

[0049] The magnetic separation process of the magnetic separator, that is, the different specific magnetic susceptibility coefficients of the materials (which can be simplified to understand: the content of materials that can be adsorbed by the magnetic field is different), are also subject to different magnetic field forces. Under the combined action of gravity, (water) buoyancy, (magnetic field force generated by the magnetic system), magnetic force, (cylinder) friction, etc., the minerals with a larger specific magnetic susceptibility coefficient are adsorbed on the cylinder. After the rotation of the cylinder, the reversal of the magnetic poles, the flushing of the water flow, the opening of the magnetic agglomeration, the re-magnetic agglomeration, the capture of the magnetic chain, etc., from the start of ore feeding to the unloading of the concentrate (sorting area), the minerals with a larger specific magnetic susceptibility coefficient (which can be simply considered as magnetic iron) are transported to the unloading area (non-magnetic area), and are washed by the water flow of the unloading water pipe and fall into the concentrate collection tank. The minerals with a smaller specific magnetic susceptibility coefficient will be gradually separated in the sorting area with the action of various forces and magnetic fields, and divided into two parts, one for tailings and the other for intermediate products (semi-finished products), referred to as medium ore. The purpose of magnetic separation is achieved, and the concentrate is enriched and the tailings are discarded in advance.

[0050] 1) There are three types of slots in traditional magnetic separators (existing technology). Once one type is selected, it cannot be changed later. As a result, if the material properties change during the mining process, the equipment cannot fit the material properties well, resulting in reduced separation effect. At the same time, all three types of slots can only produce two products, concentrate and tailings. This results in either more magnetic iron in the tailings or more ore with low magnetic susceptibility in the concentrate.

[0051] In this case, we specially set up intermediate products (semi-finished products, i.e., middlings) to sort out the "unwanted" products from tailings and concentrates and put them into intermediate products for new processing. In this way, we can "purify" the concentrates and tailings, obtain concentrates and tailings with higher indicators, and directly generate economic benefits.

[0052] 2) There are only three types of tanks in traditional magnetic separators (existing technology), and the number of rotations and direction of the cylinder cannot be changed after the design is determined.

[0053] The tank body of this case adopts a symmetrical design, and the cylinder can rotate in both directions (forward and reverse), so that it can form a downstream or countercurrent structure, and multiple options can be selected according to the material conditions. The material flow direction and the rotation of the cylinder (forward and reverse) and the rotation of the magnetic system (forward and reverse), plus the adjustable speed, the magnetic separator of this case has a variety of adjustable means, which can be applied to more complex material characteristics. Once the material characteristics change, it can respond to on-site emergencies more flexibly than traditional magnetic separators. Through the actual on-site operation test machine, the best separation effect that fits the logistics characteristics can be achieved.

[0054] 3) The magnetic wrap angle of traditional magnetic separators (existing technology) is generally 120-140° (matching the tank design). The separation belt is not long enough and the number of material turnovers is limited.

[0055] The magnetic system in this case is 360°, which can meet the requirements of multiple flipping and long-term sorting of the sorting belt formed by the maximum magnetic wrap angle. The uniform distribution of the magnetic system leads to uniform distribution of the magnetic field strength, without high and low distinction. However, the mining area needs high field strength, and the unloading area needs low field strength. Through the eccentric design of the permanent magnetic cylinder and the magnetic system, the distance between the magnetic system and the surface of the cylinder changes, which causes the field strength on the cylinder surface to change. When the distance is large, the field strength is small, and when the distance is small, the field strength is strong. The center of gravity of the magnetic system rotation is at the center of the axis, and it operates smoothly and stably. At the same time, a changing magnetic field is formed to make the sorting effect better. The slag removal effect is maximized, and the slag in the concentrate can be removed to the maximum extent.

[0056] 4) The magnetic system of the traditional magnetic separator (existing technology) is fixed, and the direction and speed of the drum are fixed and cannot be adjusted. In this way, once the properties of the material change and are different from those in the design and experiment, the separation effect will be poor. The greater the deviation between the material properties (material particle size, processing capacity, concentration, specific magnetic susceptibility, associated bodies, etc.) and the material properties in the experiment, the worse the separation effect will be.

[0057] The design of this case is that the cylinder direction, magnetic system direction and speed are all adjustable, and the material flow direction can be in the form of co-current and counter-current, with 8 combinations to choose from, and the speed can also be selected at different speeds for exploration. With so many parameters to choose from, the effect will definitely be better, and it is significantly better than traditional magnetic separators for different material characteristics.

[0058] 5) The traditional magnetic separator (existing technology) has a fixed magnetic system and a fixed magnetic field curve (fixed once the design is completed). The magnetic field curve is fixed, and it can only separate materials with very small characteristics. The separation effect for other materials will not be very good. At the same time, the effect will not be good when the material characteristics change.

[0059] In this case, the cylinder and the magnetic system are designed eccentrically, and the magnetic system and the cylinder can rotate independently. The eccentric design will cause the field strength on the surface of the cylinder to change. The field strength is low when the magnetic system surface is far from the cylinder, and high when the magnetic system is close to the cylinder. The magnetic system forms a gradual transition process from low to high. After reaching the highest point, it gradually decreases from high to low, forming such a regular cycle change.

[0060] In addition, the rotation of the magnetic system brings about a rotating magnetic field. Different magnetic system speeds bring about different rotating magnetic fields. Such multiple changes will greatly improve the applicability of the equipment's magnetic field. Further exploration of adjusting the barrel speed and the magnetic system speed in combination with changes in material properties will inevitably lead to better sorting effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0062] Figure 2 It is a schematic diagram of the tank structure of the present invention.

[0063] Figure 3 It is a structural schematic diagram of the cylinder transmission end of the present invention.

[0064] Figure 4 Side view from medium F perspective.

[0065] Figure 5 A cross-sectional view of the magnetic system structure.

[0066] Figure 6 for Figure 5 A partial enlarged view of point A in the middle.

[0067] Figure 7 This is a schematic diagram of the structure of the ore feeding box.

[0068] Figure 8 This is a schematic diagram of the structure of the ore unloading box.

[0069] In the figure: 10, cylinder; 11, roller; 12, end cover; 13, transmission sleeve; 14, transmission sprocket; 15, bearing seat; 16, main shaft; 17, transmission pair of wheels; 20, magnetic system; 21, fixing ring; 22, yoke; 23, magnetic group; 24, support plate; 25, belt fixing plate; 30, trough body; 31, tailings outlet; 32, medium ore outlet; 33, upper arc plate; 34, liquid level arc plate; 35, unloading plate; 36, closing plate; 37, outlet adjustment plate; 38, external arc plate; 40, feeding box; 41, feeding port; 42, secondary feeding arc plate; 50, unloading box; 51, top arc plate; 511, unloading water pipe; 52, collecting frame. DETAILED DESCRIPTION

[0070] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0071] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0072] Example 1

[0073] like Figure 1 , 2 As shown, a two-phase rotational eccentric wet magnetic separator comprises:

[0074] A two-phase magnetic separation mechanism includes a cylinder 10 and a magnetic system 20 eccentrically arranged in the cylinder 10, the magnetic wrap angle of the magnetic system 20 is 360°, the axis of the magnetic system 20 is arranged parallel to the axis of the cylinder 10, the magnetic system 20 forms a high magnetic field position and a low magnetic field position on the cylinder 10, and the magnetic system 20 and the cylinder 10 are both independently rotated. The magnetic wrap angle is 360° and the eccentric design is adopted relative to the cylinder 10, so that the magnetic system is evenly distributed, so that the field strength is also evenly distributed, and there is no distinction between high and low field strengths, but the field strength on the cylinder 10 will be different.

[0075] The trough body 30 has a symmetrical structure as a whole. The trough body 30 is arranged on the outside of the bottom of the two-phase magnetic separation mechanism. A gap is set between the trough body 30 and the cylinder body 10 to form a separation belt. One side of the trough body 30 is a ore feeding area and the other side is a ore unloading area. A tailings outlet 31 and a middling ore outlet 32 ​​are arranged in the trough body 30, and the tailings outlet 31 and the middling ore outlet 32 ​​are symmetrically distributed.

[0076] The ore feeding box 40 and the ore unloading box 50 are symmetrically distributed on both sides of the tank body 30. The ore feeding box 40 is arranged in the ore feeding area, and the ore unloading box 50 is arranged in the ore unloading area.

[0077] By using the ore feeding box 40 to feed ore to the cylinder 10 in the ore feeding area, the field strength of the feeding area of ​​the cylinder 10 is greater than the field strength of the ore unloading area, thus meeting the ore unloading requirements. At the same time, the use of a magnetic system with a 360° magnetic wrap angle can maximize the magnetic field intensity in the feeding area, and can adsorb magnetic minerals on the surface at the first time of feeding, and use the internal rotating magnetic system 20 to rotate, so that the mineral materials adsorbed on the surface are opened and turned over, so that the non-magnetic minerals on it can be distinguished on the separation belt and away from the cylinder 10, and discharged from the tailings outlet. The content of magnetic minerals in the tailings is extremely low. Since the tailings outlet 31 is close to the area with high field strength, some minerals with small magnetic susceptibility are also adsorbed on the cylinder 10. As the field strength on the cylinder 10 gradually decreases, the minerals with small magnetic susceptibility will be gradually released from the cylinder 10 along the separation belt. Through repeated flushing and panning, some minerals with small magnetic susceptibility and some minerals are discharged from the middle ore outlet 32, and the minerals with large magnetic susceptibility will still be in the field strength generated by the internal magnetic system 20 and adsorbed on the cylinder 10 until they are transported to the unloading area and the unloading operation is completed.

[0078] Among them, Figure 2 As shown, the tank body 30 includes:

[0079] The upper arc plate 33 has two groups symmetrically arranged, and the top of each upper arc plate 33 is provided with an unloading plate 35 arranged outward and obliquely downward; the unloading plate 35 plays the role of unloading the concentrate, and the upper arc plate 33 is connected to the unloading plate 35 to control the gap between the feed mineral and the cylinder, so that the mineral moves in the space equidistant along the surface of the cylinder, ensuring that the farthest distance in the magnetic field is the same.

[0080] The liquid level arc plate 34 is arranged at the bottom of the cylinder 10. Both ends of the liquid level arc plate 34 are provided with closing plates 36 arranged inwardly and obliquely downwardly. A gap is reserved between the end of the liquid level arc plate 34 and the upper arc plate 33, and the gap is used to discharge the corresponding material;

[0081] The outlet regulating plate 37 is symmetrically arranged in two groups. The outlet regulating plate 37 is installed at the bottom of the upper arc plate 33 to adjust the opening size between the upper arc plate 33 and the liquid level arc plate 34.

[0082] External arc plates 38, two groups of external arc plates 38 are symmetrically arranged, the top of the external arc plates 38 is installed on the bottom of the unloading plate 35, and the top is installed on the bottom of the closing plate 36;

[0083] The tailings outlet 31 and the middlings outlet 32 ​​are respectively arranged at the bottom of the corresponding external arc plate 38 , and the axis of the upper arc plate 33 and the liquid level arc plate 34 coincides with the axis of the cylinder 10 .

[0084] After passing through the upper arc plate 33, the ore material comes to the outlet regulating plate position. The pipe here can be connected to the flushing water to flush the ore. In addition to the overturning of the ore here, the ore is impacted by the water flow and the material is initially washed. At this time, the field strength is high, and the ore that can drop into the tailings must be the ore with smaller magnetism or non-magnetic ore, so the tailings are more "purified". Flushing part of the tailings and concentrates into the middlings can reduce the pressure of subsequent sorting, and also "purify" the concentrates, and pre-select and throw out part of the concentrates. The material passes through the liquid level arc plate 34 and is sorted again at this distance. Here, it is fully sorted by the buoyancy, gravity, magnetic force and mechanical force of the slurry. After the material passes the median vertical line, the distance gradually increases due to the eccentric design of the magnetic system, resulting in a gradual decrease in the field strength and a gradual decrease in the magnetic force. The materials adsorbed on the cylinder are all super "concentrates", and the minerals that cannot be adsorbed or have weak magnetism fall into the middlings as the field strength decreases and the magnetic force decreases. The middlings play the role of purifying the concentrate tailings.

[0085] Example 2

[0086] On the basis of the above embodiment, the bottom of the feeding box 40 close to the cylinder 10 is provided with a feeding port 41 obliquely downward;

[0087] A secondary feeding arc plate 42 is provided at the bottom of the feeding port 41, and the bottom of the secondary feeding arc plate 42 extends into the trough body 30, and the straight-line distance between the secondary feeding arc plate 42 and the surface of the cylinder 10 is smaller than the distance between the feeding port 41 and the cylinder 10, and a support plate is provided on the back of the secondary feeding arc plate 42. The feeding port 41 is a conical structure, and the feeding port 41 is arranged toward the upper side of the magnetic field strength position on the cylinder 10; the reduction structure of the feeding port 41 is utilized to make the ore have a certain acceleration, ensuring that the ore is more easily adsorbed on the surface, and then the secondary feeding is carried out, so that the magnetic minerals that were not adsorbed during the initial feeding can be fully adsorbed.

[0088] A flushing water pipe can be externally installed at the outlet adjustment plate 37 .

[0089] The ore unloading box 50 includes a top arc plate 51 and a collecting frame 52. The top arc plate 51 is installed with an ore unloading water pipe 511 and is placed on the upper side of the ore unloading area of ​​the tank body 30. The collecting frame 52 is arranged on the lower side of the ore unloading plate 35 in the ore unloading area.

[0090] Example 3

[0091] On the basis of the above embodiment, the cylinder 10 includes a roller 11 and an end cover 12, the end cover 12 is installed at the end of the cylinder 10 by bolts, the transmission sleeve 13 is installed on the end cover 12, and the transmission sleeve 13 is installed with a transmission sprocket 14 and a bearing seat 15, and the bearing seat 15 is installed with a large bearing installed on the outside of the transmission sleeve 13 and a small bearing installed on the inside of the transmission sleeve 13;

[0092] The transmission sleeve 13 is eccentrically installed with a main shaft 16 through a small bearing, the rotation center of the main shaft 16 is its own axis, the rotation center of the transmission sleeve 13 is its own axis, and the main shaft 16 will not rotate relative to the transmission sleeve 13. Due to the eccentric setting, the side cover of the bearing seat 15 provides support for the outer ring of the small bearing, so that the main shaft 16 is in a stable eccentric state after installation, and will not shake relatively due to the center of gravity offset. The magnetic system 20 is installed on the main shaft 16 and the transmission pair wheel 17 is installed on the main shaft 16. Or the transmission sleeve 13 and the main shaft 16 have no connection relationship, and are directly eccentrically built into the transmission sleeve 13, and another set of bearing seats located outside the bearing seat 15 are set at the end of the main shaft 16 to complete the eccentric setting of the main shaft 16 and the transmission sleeve 13.

[0093] The transmission wheel pair 17 and the transmission sprocket 14 are respectively equipped with a power source (not shown in the figure).

[0094] The power source drives the transmission wheel pair 17 and the transmission sprocket 14 to rotate respectively, and then the cylinder 10 rotates independently around its own axis, and the magnetic system 20 rotates independently around its own axis, and then the power source is a variable frequency motor, and the direction and speed are adjusted according to the needs. The characteristics of this structure are the eccentric double bearing structure, the magnetic system 20 and the cylinder 10 dual power source, which can conveniently control the speed and direction. At the same time, the distance between the surface of the cylinder 10 and the surface of the magnetic system 20 is different in size under the eccentric design, so as to control the difference in field strength. The difference and change in field strength are necessary conditions for the sorting process.

[0095] Example 4

[0096] On the basis of the above embodiment, the magnetic system 20 includes a fixing ring 21, a yoke 22 and a magnetic group 23. The fixing ring 21 and the main shaft 16 are connected by key fitting. The yoke 22 is installed on the fixing ring 21 through a rib plate and a support plate 24. The magnetic group 23 is installed on the yoke 22 through stainless steel bolts and stainless steel wrapping tape. A wrapping tape fixing plate 25 is installed on the yoke 22, and the stainless steel wrapping tape is fixed to the wrapping tape fixing plate 25 through stainless steel screws. The magnetic group 23 is installed on the yoke 22 through the wrapping tape fixing plate 25, and the magnetic wrapping angle of the magnetic group 23 is determined to be 360°, so that the field strength is evenly distributed, and the magnetic system 20 and the cylinder 10 are horizontally offset.

[0097] A method for using a two-phase rotational eccentric wet magnetic separator, the steps are as follows:

[0098] Step 1, feed the mine

[0099] After the normal installation and commissioning of the equipment is completed, the ore is fed from the feeding port 41 on the feeding box 40 to the cylinder 10. The ore and the cylinder 10 have the same direction. The ore enters the downstream area and is fed again through the secondary feeding arc plate. The ore is accelerated by gravity and has a larger flow rate in the downstream area. The ore will impact the cylinder 10.

[0100] Step 2, Magnetic Suction

[0101] Due to the magnetic field formed by the internal magnetic system 20, and the gap between the magnetic system 20 and the cylinder 10 is small, the field strength is high, and the magnetic substances in the ore are adsorbed on the cylinder 10. The cylinder 10 rotates clockwise and the magnetic system 20 rotates counterclockwise. The ore follows the rotating cylinder 10 through the downstream area to the separation area;

[0102] Step 3, Preliminary Selection

[0103] At the downstream material and the outlet regulating plate 37B, a turbulent flow is generated to lightly clean the adsorbed ore for the first time. With the reversal of the magnetic pole, the magnetic material adsorbed on the outside of the ore and the minerals with smaller magnetic susceptibility and non-magnetic minerals in the magnetic agglomeration slag are reversed, and the minerals with smaller magnetic susceptibility and non-magnetic minerals are initially washed away, and the minerals with larger magnetic susceptibility are better brought closer to the cylinder 10 for stronger adsorption.

[0104] Step 4: Tailings discharge

[0105] The initially washed minerals flow into the tailings outlet 31 through the opening at the opening adjustment plate B and become tailings. The minerals adsorbed on the cylinder 10 run through the cylinder 10 and come to the bottom of the tank 30.

[0106] Step 5: Discharge of middlings

[0107] The ore pulp is turned over and washed at the bottom of the tank 30. The magnetic agglomeration is opened and the minerals with different specific magnetic susceptibilities are subjected to different magnetic forces in the ore pulp. The minerals with smaller specific magnetic susceptibilities and non-magnetic minerals are further moved to the outside of the material, away from the cylinder 10, and are washed to the opening adjustment plate A along with the cylinder 10 or the ore pulp, and flow into the middle ore outlet 32 ​​to become middle ore.

[0108] Step 6: Unloading of concentrate

[0109] After the bottom of the tank 30 is fully washed and the magnetic agglomeration is opened and closed, only the strongly magnetic minerals will still be adsorbed on the cylinder 10, and then they will be transferred into the unloading area through the rotation of the cylinder 10, and then they will be washed and unloaded through the unloading water pipe, and the concentrate will enter the concentrate box.

[0110] As mentioned above, the cylinder 10 is in the same direction as the material and is a downstream type, focusing on a larger processing capacity. If the processing is further improved, the rotation direction of the magnetic system 20 can be changed to be the same as the speed of the cylinder 10 and the material direction, and the outlet adjustment plate 37 at AB is opened to the maximum. At this time, the equipment processing capacity reaches the maximum.

[0111] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. The replacement may be a replacement of a part of the structure, device, method step, or a complete technical solution. Any equivalent replacement or change according to the technical solution and the inventive concept of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A two-phase rotational eccentric wet magnetic separator, characterized in that: include: A two-phase magnetic separation mechanism, comprising a cylinder (10) and a magnetic system (20) eccentrically arranged in the cylinder (10), the magnetic wrap angle of the magnetic system (20) being 360°, the axis of the magnetic system (20) being arranged parallel to the axis of the cylinder (10), the magnetic system (20) forming a high magnetic field position and a low magnetic field position on the cylinder (10), and the magnetic system (20) and the cylinder (10) being arranged to rotate independently; A trough body (30), the trough body (30) is a symmetrical structure as a whole, the trough body (30) is arranged outside the bottom of the two-phase magnetic separation mechanism, a gap is set between the trough body (30) and the cylinder body (10) to form a separation belt, one side of the trough body (30) is a ore feeding area, and the other side is a ore unloading area, a tailings outlet (31) and a middling outlet (32) are arranged in the trough body (30), and the tailings outlet (31) and the middling outlet (32) are symmetrically distributed; The ore feeding box (40) and the ore discharging box (50) are symmetrically distributed on both sides of the tank body (30), the ore feeding box (40) is arranged in the ore feeding area, and the ore discharging box (50) is arranged in the ore discharging area.

2. A two-phase rotational eccentric wet magnetic separator according to claim 1, characterized in that: The tank body (30) comprises: Upper arc plates (33), two groups of upper arc plates (33) are symmetrically arranged, and the tops of the upper arc plates (33) are all provided with ore unloading plates (35) arranged outwardly and obliquely downwardly; A liquid level arc plate (34), the liquid level arc plate (34) is arranged at the bottom of the cylinder (10), and closing plates (36) are arranged inwardly and obliquely downwardly at both ends of the liquid level arc plate (34), and a gap is reserved between the end of the liquid level arc plate (34) and the upper arc plate (33), and the gap is used to discharge corresponding materials; An outlet regulating plate (37), wherein two groups of the outlet regulating plates (37) are symmetrically arranged, and the outlet regulating plates (37) are installed at the bottom of the upper arc plate (33) and are used to adjust the size of the opening between the upper arc plate (33) and the liquid level arc plate (34); The external arc plates (38) are symmetrically arranged in two groups, the top of the external arc plates (38) is installed on the bottom of the unloading plate (35), and the top is installed on the bottom of the closing plate (36).

3. A two-phase rotational eccentric wet magnetic separator according to claim 2, characterized in that: The tailings outlet (31) and the middlings outlet (32) are respectively arranged at the bottom of the corresponding external arc plate (38), and the axes of the upper arc plate (33) and the liquid level arc plate (34) coincide with the axis of the cylinder (10).

4. A two-phase rotational eccentric wet magnetic separator according to claim 2, characterized in that: The bottom of the ore feeding box (40) close to the cylinder (10) is provided with an ore feeding opening (41) obliquely downward; A secondary feeding arc plate (42) is arranged at the bottom of the ore feeding port (41), the bottom of the secondary feeding arc plate (42) extends into the tank body (30), and a support plate is arranged on the back of the secondary feeding arc plate (42).

5. A two-phase rotational eccentric wet magnetic separator according to claim 4, characterized in that: The ore feeding port (41) is a conical structure, and the ore feeding port (41) is arranged toward the upper side of the magnetic field strength position on the cylinder (10); A flushing water pipe is installed at the outlet regulating plate (37).

6. A two-phase rotational eccentric wet magnetic separator according to claim 1, characterized in that: The ore unloading box (50) comprises a top arc plate (51) and a collection frame (52); the top arc plate (51) is provided with an ore unloading water pipe (511) and is placed on the upper side of the ore unloading area of ​​the tank body (30); and the collection frame (52) is arranged on the lower side of the ore unloading plate (35) in the ore unloading area.

7. A two-phase rotational eccentric wet magnetic separator according to claim 1, characterized in that: The cylinder (10) comprises a roller (11) and an end cover (12), the end cover (12) being mounted on the end of the cylinder (10) by means of bolts, the transmission sleeve (13) being mounted on the end cover (12), and the transmission sleeve (13) being mounted with a transmission sprocket (14) and a bearing seat (15), wherein a large bearing mounted on the outside of the transmission sleeve (13) and a small bearing mounted on the inside of the transmission sleeve (13) are mounted in the bearing seat (15); A main shaft (16) is eccentrically mounted in the transmission sleeve (13) via a small bearing, and the rotation center of the main shaft (16) is its own axis center, and the rotation center of the transmission sleeve (13) is its own axis center. The magnetic system (20) is mounted on the main shaft (16), and a transmission pair of wheels (17) is mounted on the main shaft (16); The transmission wheel pair (17) and the transmission sprocket (14) are respectively equipped with a power source.

8. A two-phase rotational eccentric wet magnetic separator according to claim 7, characterized in that: The magnetic system (20) comprises a fixing ring (21), a magnetic yoke (22) and a magnetic group (23); the fixing ring (21) and the main shaft (16) are connected by key fitting; the magnetic yoke (22) is mounted on the fixing ring (21) by means of a rib plate and a support plate (24); the magnetic group (23) is mounted on the magnetic yoke (22) by means of stainless steel bolts and stainless steel wrapping tape; a wrapping tape fixing plate (25) is mounted on the magnetic yoke (22), and the stainless steel wrapping tape is fixed to the wrapping tape fixing plate (25) by means of stainless steel screws.

9. A method for using a dual-phase rotational eccentric wet magnetic separator, characterized in that: Here are the steps: Step 1, feed the mine After the normal installation and commissioning of the equipment is completed, the ore is fed from the ore feeding port (41) on the ore feeding box (40) to the cylinder (10). The ore and the cylinder (10) have the same direction of rotation. The ore enters the downstream area and is fed again through the secondary ore feeding arc plate. The ore is accelerated by gravity and has a larger flow rate in the downstream area. The ore will impact the cylinder (10). Step 2, magnetic attraction Due to the magnetic field effect formed by the internal magnetic system (20), the gap between the magnetic system (20) and the cylinder (10) is small, the field strength is high, and the magnetic substances in the ore are adsorbed on the cylinder (10). The cylinder (10) rotates clockwise and the magnetic system (20) rotates counterclockwise. The ore follows the rotating cylinder (10) through the downstream area and arrives at the separation area. Step 3, Preliminary Selection At the downstream material and the outlet regulating plate (37) B, a turbulent flow is generated to lightly clean the adsorbed ore for the first time. With the reversal of the magnetic pole, the magnetic material adsorbed on the outside of the ore and the minerals with smaller magnetic susceptibility and non-magnetic minerals in the magnetic agglomeration slag are reversed, and the minerals with smaller magnetic susceptibility and non-magnetic minerals are initially washed away, so that the minerals with larger magnetic susceptibility are closer to the cylinder (10) and adsorbed more firmly. Step 4: Tailings discharge The initially washed minerals flow into the tailings outlet (31) through the opening at the opening adjustment plate B and become tailings. The minerals adsorbed on the cylinder (10) are circulated through the cylinder (10) and arrive at the bottom of the tank (30). Step 5: Discharge of middlings The ore pulp is turned over and washed at the bottom of the tank (30), the magnetic agglomeration is opened, and the minerals with different specific magnetic susceptibilities are subjected to different magnetic forces in the ore pulp. The minerals with smaller specific magnetic susceptibilities and non-magnetic minerals are further moved to the outside of the material, away from the cylinder (10), and are washed along with the cylinder (10) or the ore pulp to the opening adjustment plate A, and flow into the middle ore outlet (32) to become middle ore; Step 6: Unloading of concentrate After the bottom of the tank (30) is fully washed and the magnetic agglomeration is opened and closed, only the strongly magnetic minerals will remain adsorbed on the cylinder (10), and will be transferred through the cylinder (10) to enter the unloading area through rotation, and will be washed and unloaded through the unloading water pipe (511) with flushing water, and the concentrate will enter the collection frame (52).

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