A composite force field separation device for removing fine size slime

Abstract

The utility model relates to mineral separation technical field, concretely relates to a kind of composite force field sorting equipment of fine particle grade slime removal, including sorting shell, feed inlet and discharge port, the sorting shell includes outer shell and is located at the inner barrel-shaped inner shell of outer shell inside, pass through up and down, the upper portion of the outer shell is barrel-shaped, the inner diameter of lower portion gradually reduces and is lower than inner shell lower end, the upper end of the outer shell is closed, lower end is equipped with discharge port one, the upper end of the inner shell is not lower than outer shell upper end and is communicated with discharge port two, there is mineral flow channel between the outer shell and inner shell, and inner shell inside, the outer shell has the electrical property opposite with the mineral of purpose, and inner shell has the electrical property same with the mineral of purpose;The feed inlet is located on the peripheral wall of outer shell along the tangent direction of outer shell.

Description

Technical Field

[0001] This utility model relates to the field of mineral sorting technology, specifically to a composite force field sorting device for removing fine-grained mineral slime. Background Technology

[0002] Within the scope of mineral sorting, mineral particles with a size smaller than 10 μm can be called slime. The surface characteristics of fine-grained slime particles often give them an electrical charge, especially silicate minerals such as kaolinite and montmorillonite. In the crystal structure of these minerals, Si... 4+ By Al 3+ Or Mg 2+ / Fe 2+ Plasma substitution leads to an excess of negative charge in the crystal lattice, thus making the surface of the sludge negatively charged. In addition, the ionization or hydrolysis of surface groups of oxide minerals such as quartz (SiO2) and hematite (Fe2O3) will cause protonation or deprotonation, which will also make the surface of the sludge positively or negatively charged. However, the electrical properties of the same type of sludge are often the same.

[0003] When fine-grained slime has the opposite charge to the target mineral, it will be attracted to the surface of the target mineral by electrostatic attraction, forming a "slime cover". This "contaminates" the surface of the target mineral, making it less floatable during the mineral flotation process and severely deteriorating the flotation effect. At the same time, the charged slime will also affect the stability and selectivity of the foam, increasing reagent consumption and production costs.

[0004] Although pre-desliming is usually performed before mineral flotation, fine-grained slime that forms a "sliming cap" is difficult to remove during pre-desliming, ultimately causing the fine-grained slime to enter the flotation process along with the target mineral, affecting the flotation effect. Utility Model Content

[0005] This invention aims to solve the problem of the inability to efficiently remove fine-grained mineral mud that forms a "mineral mud cover" during the pre-desliming process. It provides a composite force field separation device for removing fine-grained mineral mud. By utilizing centrifugal force field and electrostatic field, it disrupts the "electrical environment" of fine-grained mineral mud, thereby achieving high-quality removal of fine-grained mineral mud.

[0006] The technical solution of this utility model is: a composite force field separation device for removing fine-grained mineral slime, comprising a separation shell, a feed inlet, and a discharge outlet. The separation shell comprises an outer shell and a cylindrical inner shell disposed inside the outer shell and extending vertically. The upper part of the outer shell is cylindrical, and the lower part has a gradually decreasing inner diameter that is lower than the lower end of the inner shell. The upper end of the outer shell is closed, and the lower end has a discharge outlet. The upper end of the inner shell is not lower than the upper end of the outer shell and is connected to a second discharge outlet. Mineral flow channels exist between the outer shell and the inner shell, as well as inside the inner shell. The outer shell has an electrical property opposite to that of the target mineral, and the inner shell has the same electrical property as the target mineral. Furthermore, the inner side of the outer shell and the inner and outer sides of the inner shell are non-conductive. The feed inlet is located on the peripheral wall of the outer shell along the tangential direction of the outer shell.

[0007] Using the above scheme, the mineral flow enters the space between the outer and inner shells tangentially from the inlet, thus spiraling and flowing downwards between the outer and inner shells. During the flow, the target minerals gradually move towards the outer shell, while the sludge gradually moves towards the inner shell, achieving pre-separation of the sludge and the target minerals. During the flow, a counter-rotating upward mineral flow is generated internally, allowing the sludge to rotate and rise with this flow, entering the inner shell and being discharged through discharge port two. The target minerals, flowing downwards in a spiral, are discharged through discharge port one at the lower end of the outer shell, thus removing fine-grained sludge from the "sludge cover".

[0008] Based on the above solution, the present invention can be further improved as follows: Furthermore, a magnetic system is provided circumferentially at the lower part of the outer shell, and the polarity of the magnets in the magnetic system is alternately distributed along the axial direction of the sorting shell. This means that when the mineral flow enters the lower part of the outer shell, the target mineral will also be affected by the magnetic system with alternating polarity, causing the target mineral to flip and thus throwing out the sludge inside, further improving the removal effect of fine-grained sludge.

[0009] Furthermore, a rod is inserted through the middle of the inner shell, and there is a mineral flow channel between the rod and the inner shell. The lower end of the rod is lower than the lower end of the inner shell and higher than the lower end of the outer shell. The part of the rod extending out of the inner shell has the same electrical properties as the inner shell and its surface is non-conductive.

[0010] Furthermore, the sorting housing also includes a cover plate and an upper housing one with a lower opening and an upper sealing. The upper housing one is located on the upper part of the cover plate and is fixedly connected to the cover plate. The cover plate is located on the top of the outer shell. The upper end of the inner shell passes through the cover plate and extends into the interior of the upper housing one. The discharge port two is located on one side of the upper housing one.

[0011] Furthermore, the outer shell includes an upper shell and a lower shell, the inner diameter of the lower shell gradually decreasing from top to bottom; the magnetic system is located on the outside of the lower shell and the upper end of the magnetic system is lower than the lower end of the inner shell, and the cross-section of the magnetic system is annular.

[0012] Furthermore, the polarity of the magnets in the magnetic system alternates at least three times, and the inner diameter of the magnetic system matches the outer diameter of the lower shell.

[0013] Furthermore, the upper feed inlet of the outer shell and the corresponding upper part of the inner shell are not electrically conductive, ensuring that the slurry flow will be subjected to an electric field to achieve stratification after entering the outer and inner shells, thus avoiding affecting the inflow of the slurry.

[0014] Furthermore, the outer shell has an insulating material layer and a conductive material layer distributed from the inside out, the inner shell has an insulating material layer, a conductive material layer and an insulating material layer distributed from the inside out, and the rod has an insulating material layer, a conductive material layer and an insulating material layer distributed from the inside out.

[0015] 1. In this utility model, the mineral flow enters the space between the outer shell and the inner shell through the inlet along the tangential direction of the outer shell. It then spirals and flows downwards between the outer and inner shells, causing the target minerals to move closer to the outer shell and the sludge to move closer to the inner shell during the flow. This achieves pre-separation of the sludge and the target minerals. During the flow, a reverse-rotating upward mineral flow is generated within the mineral flow, allowing the sludge to rotate and rise with it, entering the inner shell and being discharged through discharge port two. The target minerals, flowing downwards in a spiral, are discharged through discharge port one at the lower end of the outer shell, thus achieving the removal of fine-grained sludge from the "sludge cover".

[0016] 2. In a further embodiment of this utility model, when the mineral flow enters the lower part of the outer shell, the target mineral is also subjected to the action of a magnetic system with alternating polarity, causing the target mineral to flip over and thus fling out the sludge inside, further improving the removal effect of fine-grained sludge. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the structure of the feed inlet in Embodiment 1 of this utility model; Figure 3 This is a schematic diagram of the layer structure distribution of the outer shell in this utility model; Figure 4 This is a schematic diagram of the layer structure distribution of the inner shell in this utility model; Figure 5This is a schematic diagram of the layered structure distribution of the rod body in this utility model; Figure 6 This is a schematic diagram of the structure of Embodiment 2 of this utility model; Figure 7 This is a perspective view of the magnetic system in Embodiment 2 of this utility model.

[0018] The attached diagram is labeled as follows: 1. Sorting shell, 101. Outer shell, 1011. Upper shell II, 1012. Lower shell, 102. Inner shell, 103. Rod, 104. Cover plate, 105. Upper shell I; 2. Feed inlet; 3. Discharge outlet; 301. Discharge outlet one; 302. Discharge outlet two; 4. Magnetic system; 5. Non-metallic material layer; 6. Insulating material layer; 7. Conductive material layer. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: like Figure 1 As shown, a composite force field separation device for removing fine-grained slime is disclosed. The target mineral being separated has the opposite charge to the slime. For example, in the flotation of nickel, copper-nickel sulfide ores, and platinum group metal minerals, the surface of the metal minerals is positively charged, while the fine quartz slime is negatively charged. The two will form composite particles ("slime cap"). The device includes a separation shell 1, a feed inlet 2, and a discharge outlet 3. The separation shell 1 includes an outer shell 101 and a cylindrical inner shell 102 that runs vertically through the outer shell 101. The upper part of the outer shell (101) is cylindrical, and the inner diameter gradually decreases at the bottom. Specifically, the outer shell 101 includes an upper shell 1011 and a lower shell 1012. The inner diameter of the lower shell 1012 gradually decreases from top to bottom. The lower shell 1012 has a cross-section that is larger at the top and smaller at the bottom, and the lower shell 1012 is lower than the lower end of the inner shell 102. The upper end of the outer shell 101 is closed, and the lower end is provided with a discharge port 301. The upper end of the inner shell 102 is not lower than the upper end of the outer shell and is connected to the discharge port 302. There are mineral flow channels between the outer shell 101 and the inner shell 102, as well as inside the inner shell 102. The outer shell 101 has an electrical property opposite to that of the target mineral, and the inner shell 102 has the same electrical property as the target mineral. The inner side of the outer shell 101 and the inner and outer sides of the inner shell 102 are not conductive. The feed port 2 is located on the peripheral wall of the outer shell 101 along the tangent direction of the outer shell 101.

[0020] In this embodiment, since the feed inlet 2 is located on the peripheral wall of the outer shell 101 along the tangential direction of the outer shell 101, the mineral flow enters rapidly between the outer shell 101 and the inner shell 102 with a certain initial velocity through the feed inlet 2 along the tangential direction of the outer shell 101. This causes the mineral to spirally rotate and flow downwards between the outer shell 101 and the inner shell 102. Because the outer shell 101 has an electrical property opposite to that of the target mineral, and the inner shell 102 has the same electrical property as the target mineral, the target mineral tends to move closer to the outer shell 101 and the sludge during the flow. The minerals tend to move closer to the inner shell 102, thereby achieving pre-separation of the sludge and the target mineral. As the inner diameter of the lower end of the outer shell 101 gradually decreases, a reverse rotating upward mineral flow is generated inside the mineral flow during its flow. Since the sludge is concentrated in the middle of the sorting shell 1 and its specific gravity is less than that of the target mineral, the sludge can rotate and rise with the reverse rotating upward mineral flow, enter the inner shell 102, and be discharged from the discharge port 2 302. The target minerals fall with the spiral rotating mineral flow and are discharged from the discharge port 1 301 at the lower end of the outer shell 101.

[0021] In one possible implementation, a rod 103 is inserted through the middle of the inner shell 102, and a mineral flow channel exists between the rod 103 and the inner shell 102. The lower end of the rod 103 is lower than the lower end of the inner shell 102 but higher than the lower end of the outer shell 101. The lower end of the inner shell 102 is lower than the lower end of the upper shell 1011 but higher than the lower end of the lower shell 1012. This results in the lower end of the rod 103 being lower than the lower end of the upper shell 1011 but higher than the lower end of the lower shell 1012. The portion of the rod 103 extending out of the inner shell 102 has the same characteristics as the inner shell 102. The rod 103 is electrically neutral, and its surface is non-conductive. This ensures that the electrical properties of the rod 103 and the inner shell 102 do not interfere with each other. It also allows a continuous electric field to be formed vertically between the outer shell 101, the inner shell 102, and the rod 103. As a result, when the mineral flow enters the lower shell 1012, which has a gradually narrowing inner diameter, the lower shell 1012 and the rod 103 together ensure that the sludge is mainly concentrated in the middle of the sorting shell 1 and the target mineral is mainly concentrated on the outer wall of the sorting shell 1. This further improves the removal effect of fine-grained sludge.

[0022] As one possible implementation, the sorting housing 1 further includes a cover plate 104 and an upper housing 105 with a lower opening and an upper sealing. The upper housing 105 is located on the upper end of the cover plate 104 and is fixedly connected to the cover plate 104. The cover plate 104 is located on the top of the outer shell 101 and is used to separate the outer shell 101 from the upper housing 105. The upper end of the inner housing 102 passes through the cover plate 104 and extends into the interior of the upper housing 105. The discharge port 302 is located on one side of the upper housing 105.

[0023] In this embodiment, the lower end of the upper housing 105 and the upper end of the outer housing 101 are both provided with flange structures to facilitate the fixed connection between the upper housing 105 and the outer housing 101. The middle part of the cover plate 104 is provided with a through hole to facilitate the inner housing 102 to pass through. The connection between the cover plate 104 and the inner housing 102 is provided with a sealing element to ensure the sealing of the connection. The upper end of the rod 103 extends out of the upper housing 105 to facilitate the fixing of the rod 103.

[0024] As one possible implementation, the upper inlet 2 of the outer shell 101 and the corresponding upper part of the inner shell 102 are not electrically charged, ensuring that the slurry flow will be subjected to the electric field to achieve stratification after entering the outer shell 101 and the inner shell 102, thus avoiding affecting the inflow of the slurry flow.

[0025] As one possible implementation method, such as Figures 2-4 As shown, the outer shell 101 is layered from the inside out as a non-metallic material layer 5, an insulating material layer 6, and a conductive material layer 7, making the inner side of the outer shell 101 non-conductive but allowing an electric field to pass through. The inner shell 102 is layered from the inside out as a non-metallic material layer 5, an insulating material layer 6, a conductive material layer 7, an insulating material layer 6, and a non-metallic material layer 5, making both the outer and inner sides of the inner shell 102 non-conductive but allowing an electric field to pass through. The rod 103 is layered from the inside out as an insulating material layer 6, a conductive material layer 7, an insulating material layer 6, and a non-metallic material layer 5, making the outer wall of the rod 103 non-conductive but allowing an electric field to pass through. This ensures that the slurry flow, after entering the sorting shell 1, will only be affected by the generated electric field and will not adhere to the surfaces of the outer shell 101, the inner shell 102, and the rod 103.

[0026] In this embodiment, the surface of the non-metallic material layer 5 is smooth and wear-resistant, such as a rubber layer; the insulating material layer may be wear-resistant, such as a ceramic layer; and the conductive material layer 7 may be a metal plate, preferably a thinner metal plate, such as an aluminum or zinc metal plate.

[0027] In this embodiment, the conductive material layer 7 of the outer shell 101 is connected to the negative terminal of the power supply via a wire, making it negatively charged. The conductive material layers 7 of the inner shell 102 and the rod 103 are connected to the positive terminal of the power supply via wires, making them positively charged. To ensure the stability of the sorting equipment, the outer shell 101 can be housed inside a frame with a matching shape. Only holes need to be made at suitable frame and layer locations to allow wires to pass through (as shown in the attached diagram). Figure 1As shown, the positive insulated wire is a, the negative insulated wire is b, and the wire connected to the conductive material layer 7 of the outer shell 101 is only shown on one side (the other side can be symmetrically arranged). The lower part of the outer shell 101 is provided with a support frame to lift it off the ground, so that the target minerals can be collected and sorted through the discharge port 301.

[0028] In this embodiment, when used: Under pressure, a mineral stream with initial velocity enters the space between the outer shell 101 and the inner shell 102 through the feed inlet 2 along the peripheral wall of the outer shell 101. Specifically, the mineral stream can be pumped into the sorting shell 1 by a sand pump. The mineral stream flows and falls in a spiral motion between the outer shell 101 and the inner shell 102. During the flow, the material is affected by the electric field formed between the outer shell 101 and the inner shell 102, causing the target minerals to move closer to the outer shell 101 and the sludge to move closer to the inner shell 102, thus achieving... Pre-stratification; when the mineral flow enters the electric field formed between the outer shell 101 and the rod 103, as the inner diameter of the lower end of the outer shell 101 gradually decreases, a reverse rotating upward mineral flow will be generated inside the mineral flow; when the mineral flow enters the lower end of the outer shell (101), the sludge rotates and rises along the rod 103 with the reverse rotating upward mineral flow, enters the mineral flow channel between the rod 103 and the inner shell 102, and is discharged from the discharge port 2 302; the target mineral is discharged from the discharge port 1 301 at the lower end of the outer shell 101 with the rotating downward mineral flow.

[0029] Example 2: The technical solution in this embodiment is the same as that in Embodiment 1, except that: When sorting equipment is used to sort magnetic target minerals, such as chlorite-containing iron minerals, such as... Figure 5 As shown, a magnetic system 4 is provided circumferentially at the lower part of the outer shell 101. The polarities of the magnets in the magnetic system 4 are alternately distributed along the axial direction of the sorting shell 1. This allows the target mineral to be subjected to the alternating polarity of the magnetic system 4 when the mineral flow enters the lower part of the outer shell 101, causing the target mineral to flip and thus throw out the sludge inside. In this embodiment, barium strontium ferrite magnets are used to further reduce the sludge covering.

[0030] In one possible implementation, the magnetic system 4 is located outside the lower housing 1012 and the upper end of the magnetic system 4 is lower than the lower end of the inner housing 102, and the cross-section of the magnetic system 4 is annular.

[0031] In one possible implementation, the polarity of the magnets in the magnetic system 4 alternates at least three times, and the inner diameter of the magnetic system 4 matches the outer diameter of the lower housing 1012, such as... Figure 7 As shown ( Figure 7Only the overall shape of magnetic system 4 is shown; the specific arrangement of its internal magnets is not shown.

[0032] In this embodiment, the upper end of the magnetic system 4 is slightly lower than the lower end of the inner shell 102, and the lower shell 1012 located in the lower part of the magnetic system 4 is not electrically charged. That is, before the target mineral is discharged from the discharge port 301, there is a section that is only subjected to the external force generated by the magnetic system 4.

[0033] In this embodiment, the difference from that in Embodiment 1 is as follows: When the mineral flow enters the lower end of the outer shell (101), that is, when the mineral flow enters the electric field formed between the outer shell 101 and the rod 103, the target mineral will also be affected by the magnetic system 4 with alternating polarity, causing the target mineral to flip over and thus throw out the sludge inside.

[0034] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Any equivalent or equivalent modifications or substitutions to the technical solutions of the present invention without departing from the spirit of the present invention or the scope of disclosure shall fall within the protection scope of the present invention.

Claims

1. A composite force field separation device for removing fine-grained mineral slime, comprising a separation shell (1), a feed inlet (2), and a discharge outlet (3), characterized in that, The sorting housing (1) includes an outer shell (101) and a cylindrical inner shell (102) that runs vertically through the outer shell (101). The upper part of the outer shell (101) is cylindrical, and the inner diameter of the lower part gradually decreases and is lower than the lower end of the inner shell (102). The upper end of the outer shell (101) is closed, and the lower end is provided with a discharge port one (301). The upper end of the inner shell (102) is not lower than the upper end of the outer shell and is connected to the discharge port two (302). There are mineral flow channels between the outer shell (101) and the inner shell (102), and inside the inner shell (102). The outer shell (101) has an electrical property opposite to that of the target mineral, and the inner shell (102) has the same electrical property as the target mineral. The inner side of the outer shell (101) and the inner and outer sides of the inner shell (102) are not conductive. The feed inlet (2) is located on the peripheral wall of the outer shell (101) along the tangential direction of the outer shell (101).

2. The composite force field separation equipment for removing fine-grained slime according to claim 1, characterized in that, The lower circumferential part of the outer shell (101) is provided with a magnetic system (4), and the polarity of the magnets in the magnetic system (4) is alternately distributed along the axial direction of the sorting shell (1).

3. The composite force field separation equipment for removing fine-grained mineral slime according to claim 2, characterized in that, A rod (103) is inserted through the middle of the inner shell (102). There is a mineral flow channel between the rod (103) and the inner shell (102). The lower end of the rod (103) is lower than the lower end of the inner shell (102) and higher than the lower end of the outer shell (101). The part of the rod (103) that extends out of the inner shell (102) has the same electrical properties as the inner shell (102) and its surface is not conductive.

4. The composite force field separation equipment for removing fine-grained slime according to claim 1, characterized in that, The sorting housing (1) also includes a cover plate (104) and an upper housing (105) with an opening at the bottom and a block at the top. The upper housing (105) is located on the top of the cover plate (104) and is fixedly connected to the cover plate (104). The cover plate (104) is located on the top of the outer shell (101). The upper end of the inner housing (102) passes through the cover plate (104) and extends into the interior of the upper housing (105). The discharge port (302) is located on one side of the upper housing (105).

5. The composite force field separation equipment for removing fine-grained mineral slime according to claim 2, characterized in that, The outer shell (101) includes an upper shell (1011) and a lower shell (1012). The inner diameter of the lower shell (1012) gradually decreases from top to bottom. The magnetic system (4) is located outside the lower shell (1012) and the upper end of the magnetic system (4) is lower than the lower end of the inner shell (102). The cross-section of the magnetic system (4) is annular.

6. The composite force field separation equipment for removing fine-grained mineral slime according to claim 5, characterized in that, The polarity of the magnets in the magnetic system (4) alternates at least 3 times, and the inner diameter of the magnetic system (4) matches the outer diameter of the lower shell (1012).

7. The composite force field separation equipment for removing fine-grained mineral slime according to claim 3, characterized in that, The upper inlet (2) of the outer shell (101) and the upper part of the inner shell (102) corresponding to the inlet (2) are not electrically connected.

8. The composite force field separation equipment for removing fine-grained mineral slime according to claim 7, characterized in that, The outer shell (101) has an insulating material layer (6) and a conductive material layer (7) distributed from the inside to the outside. The inner shell (102) has an insulating material layer (6), a conductive material layer (7) and an insulating material layer (6) distributed from the inside to the outside. The rod (103) has an insulating material layer (6), a conductive material layer (7) and an insulating material layer (6) distributed from the inside to the outside.

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