JP2014121696A - Sorting plate and table specific gravity concentrator using the same and gravity concentration method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent inconvenience of operation of a partition plate caused by minute concentrate going into gap between the partition plate and a shaking table, and to prevent lifetime decline of the partition plate and the shaking table caused by the concentrate acting as abrasives.SOLUTION: A sorting plate 40 used to sort concentrate 101 from tailing 102 in table gravity concentration using a shaking table 10 comprises a partition plate 41 arranged with a minute gap G between the surface of the shaking table and itself, and fluid supply means 43 provided on the partition plate and supplying fluid to the gap.

Description

  The present invention relates to a sorting plate, a table specific gravity sorter using the same, and a specific gravity sorting method.

  Conventionally, as a method of beneficiation of gold ore, a method called a bluening method in which gold ore is crushed and then finely pulverized to an appropriate particle size and then suspended in a cyanide aqueous solution using cyanide and leached out of gold. In addition, there is one based on specific gravity beneficiation using the difference in specific gravity of finely pulverized ores (see, for example, Patent Document 1).

  For example, Patent Literature 1 proposes table specific gravity beneficiation (also referred to as oscillating thin current beneficiation) as a method of recovering high-grade gold concentrate that can be directly refined only by specific gravity beneficiation.

  In general, table gravity separators such as a Wilfrey table and a James table are used for the table density. The table specific gravity sorter includes a vibration table having a riffle formed along a vibration direction, and a vibration mechanism for giving a reciprocating motion to the vibration table. On the vibration table, gold ore grains are fed together with a water flow flowing in a direction different from the vibration direction of the vibration table. As a result, gold particles with heavy specific gravity move along the riffle in the direction of vibration and are recovered as concentrate. As discharged. The concentrate and tailings are separated by, for example, a partition plate that can move along a vibration table, and collected in each storage tank.

  By supplying ores with different specific gravity to the vibration table in this way, the concentrate and the gangue mineral or sulfide mineral are separated and recovered.

  However, simply using a table gravity separator does not clearly separate the concentrate and tailings. In addition, the separation status of concentrate and tailing differs depending on the type of ore to be supplied, especially gold ore, depending on the place of production and the situation (whether or not other beneficiation is performed in advance).

  Furthermore, although table specific gravity beneficiation may be performed repeatedly, the boundary position of concentrate and tailing may differ for each batch as well.

  For this reason, it is necessary to adjust the position of a partition plate for every operation, Therefore, a partition plate is comprised so that a movement along a vibration table is possible.

  In order to automatically and appropriately adjust the position of the partition plate, the sorting status on the vibration table is always monitored unattended by using a CCD camera or the like connected to the image processing device on the vibration table, and the optimum sorting is performed. It has also been proposed to use a partition plate for mechanical beneficiation so as to be able to perform (see, for example, Patent Document 2).

  Thus, since the partition plate is movable, it is difficult to provide the partition plate in close contact with the surface of the vibration table, and it is necessary to prevent wear between the vibration table and the partition plate. It is often provided with a gap of about 1 mm.

US Pat. No. 6,818,842 JP 2012-139675 A

  However, simply separating the partition plate and the vibration table causes the ore to be ore to be finely crushed, so that the ore enters the gap between the partition plate and the vibration table due to the particle size, There has been a problem that the operation load of the partition plate may increase or the operation may stop.

  In addition, since fine ore becomes an abrasive and wears the bottom of the partition plate and the surface of the vibration table, it is necessary to frequently adjust the position of the partition plate and the vibration table. It was necessary to replace the material and the partition plate, and the replacement work was complicated.

  Therefore, the present invention prevents the occurrence of malfunction of the partition plate due to fine concentrate entering the gap between the partition plate and the vibration table, and the partition plate and vibration caused by the concentrate working as an abrasive. The purpose is to prevent a decrease in the life of the table.

In order to achieve the above object, a sorting plate according to one aspect of the present invention is a sorting plate used when sorting concentrate and tailing in table specific gravity sorting using a vibration table,
A partition plate disposed with a minute gap between the surface of the vibration table;
Fluid supply means provided on the partition plate for supplying fluid to the gap.

In addition, a table gravity separator according to another aspect of the present invention includes a vibration table,
A ruffle provided on the surface of the vibration table;
And the sorting plate disposed along an edge of the vibration table.

Furthermore, the specific gravity beneficiation method according to another aspect of the present invention is a specific gravity beneficiation method for sorting concentrate and tailing using partition plates in a table specific gravity beneficiation using a vibration table,
The partition plate is arranged so that a minute gap is formed between the bottom surface of the partition plate and the surface of the vibration table,
The table specific gravity separation is performed while supplying a fluid to the gap.

  According to the present invention, it is possible to prevent the problem of the partition plate due to the biting of pulverized fine ore.

It is the figure which showed an example of the sorting board which concerns on Embodiment 1 of this invention, and a table specific gravity sorter using the same. It is the figure which showed an example of the sorting board which concerns on Embodiment 1 of this invention. FIG. 2A is a front view of the sorting plate. FIG. 2B is a side view of the sorting plate. It is a figure for demonstrating in more detail the shape of the partition plate of the sorting plate which concerns on Embodiment 1 of this invention. FIG. 3A is a top view of the sorting plate according to the first embodiment. FIG. 3B is a side view of the sorting plate according to the comparative example. FIG. 3C is a side view of the sorting plate according to the first embodiment. It is the figure which showed an example of the sorting board which concerns on Embodiment 2 of this invention. It is the figure which showed an example of the sorting board which concerns on Embodiment 3 of this invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

Embodiment 1
FIG. 1 is a diagram showing an example of a sorting plate according to Embodiment 1 of the present invention and a table specific gravity sorter using the same. The table specific gravity sorter according to the present embodiment includes a vibration table 10, a ruffle 11, a vibration mechanism 12, a drive device 13, a concentrate storage tank 20, a tailings storage tank 30, a sorting plate 40, and a hose. 50, a flow rate adjustment valve 51, a sorting plate drive mechanism 60, a camera 70, an image analysis device 80, a nozzle 90, a hose 91, a flow rate adjustment valve 92, and a mineral particle 100. The nozzle 90 has a plurality of supply ports 90a.

  The basic structure of the table specific gravity sorter according to this embodiment is the same as that of a conventionally known table specific gravity sorter except for the sorting plate 40, the hose 50 connected thereto, and the flow rate adjusting valve 51. . As the vibration table 10, any of the types of vibration tables 10 known as the Wilfrey table and the James table can be applied. In FIG. 1, the Wilfrey type is shown. The vibration table 10 is provided with a plurality of ruffles 11 on the surface of any type. The vibration table 10 is normally placed on a support base (not shown) via means such as a rail, and can be vibrated by a separate vibration mechanism 12. In addition, since the vibration mechanism 12 which vibrates such a vibration table 10 is known, the description is abbreviate | omitted. In addition, a nozzle 90 connected to a hose 91 having a flow rate adjusting valve 92 is provided on the heel side along the vibration table 10, and extends from the supply port 90 a of the nozzle 90 to the entire surface of the vibration table 10. It is comprised so that water can be supplied toward this side.

  Although the Wilfrey type and the James type differ in the shape of the vibration table 10 and the attachment and arrangement of the ruffle 11, the vibration table 10 is common in that it is configured to vibrate in the extending direction of the ruffle 11. That is, among the ores 100 supplied on the surface of the vibration table 10, the high specific gravity ores having a high specific gravity move along with the forward movement of the vibration table 10 along the extending direction of the ruffle 11. On the other hand, the low specific gravity ore having a low specific gravity is subjected to the resistance of water flow flowing in the direction orthogonal to the extending direction of the riffle 11 along the inclination of the table surface regardless of the vibration motion of the vibration table 10. Move over the riffle 11 in the same direction as the water flow. Similarly, between the ore grains 100 having the same specific gravity, finer particles tend to move forward with the vibration motion of the vibration table 10, and coarser particles tend to move in the water flow direction. Therefore, most of the concentrate that is high specific gravity ore drops off from the edge of the vibration table 10 (the concentrate side edge) in the forward direction, which is the direction of the vibration motion of the board, and is recovered in the concentrate storage tank 20. Is done. On the other hand, most of the tailings, which are low specific gravity ores, drop off from the edge of the vibration table 10 (the tailings side edge) on the side of the vibration table 10 that is in the water flow direction and are collected in the tailings storage tank 30. Is done. As a result, concentrate and tailings are separated and recovered. In addition, since there is an influence of the size of the ore as described above, the concentrate and tailing are not clearly separated, there is a zone called a single blade where both are mixed, and among the high specific gravity ore Some of the coarse grains fall off from the tailings side edges, and some of the fine grains of the low specific gravity ores enter the concentrate side.

  In this separation, the sorting plate 40 that can move within the predetermined movable range along the edge of the vibration table 10 (the concentrate side edge), and the zone where the concentrate falls off the vibration table 10 and the tailings The zone is divided into zones that fall off from the vibration table 10 and are recovered together with the water flow in the concentrate-side storage tank 20 and the tailing-side storage tank 30 provided under the vibration table 10 of each zone.

  The sorting plate 40 is a plate for sorting the ore grains 100 into concentrates and tailings, and is configured to be movable by the sorting plate drive mechanism 60. The sorting plate 40 according to the present embodiment is connected to a hose 50 provided with a flow rate adjusting valve 51, and is configured to be able to supply liquid such as water to the gap between the sorting plate 40 and the vibration table 10. As a result, liquid can be supplied to the gap between the surface of the vibration table 10 and the bottom surface of the sorting plate 40, preventing the fine concentrate 101 from staying in the gap and preventing biting and the like. it can. The specific configuration and function of the sorting plate 40 and the sorting plate drive mechanism 60 will be described later.

  By the way, in the Wilfrey type vibration table 10, the ruffles 11 are arranged at equal intervals along the vibration direction of the vibration table 10. The length of the ruffle 11 extends over the entire length of the vibration table 10 on the tailing discharge side on the front side of the vibration table 10, but is limited to the portion to be supplied on the right-side supply side. The length of each ruffle 11 is gradually increased toward the discharge side. Further, the depth of the groove formed by the ruffle 11 gradually becomes shallower from the vibrating mechanism 12 side to the concentrate discharge side on the left end side, and gradually becomes deeper from the supply side to the tailing discharge side. ing. Normally, the top of the vibration table 10 including the ruffle 11 is covered with a material such as linoleum.

  The vibration table 10 is basically arranged with an inclination of about 0 ° to 10 ° so as to incline from the supply side to the tailing discharge side. The table specific gravity sorter according to the present embodiment is configured such that the inclination angle of the vibration table 10 is adjusted in an angle range of 0.5 ° to 9 °, and the lower side of the vibration table 10 on the feed side. Further, a vibration table driving device 13 for adjusting the tilt angle of the vibration table 10 is provided. As this vibration table drive device 13, an existing drive mechanism such as an actuator that can raise and lower the supply side of the vibration table 10 within a predetermined range can be used.

  The other actions relating to the vibration table 10 including the supply position of the ore grains 100 are the same as those known in the art, and a detailed description thereof will be omitted in this specification. In addition, there are various shapes of the vibration table 10, the shape of the ruffle 11 and the groove, the structure and the arrangement depending on the type of the ore, and the size of the ore to be supplied is also considered. Will be selected as appropriate.

  The camera 70 is an imaging unit that captures an image of the beneficiation state on the vibration table 10. Image data captured by the camera 70 is transmitted to the image analysis device 80.

  The image analysis device 80 is a means for analyzing the image data received from the camera 70 and determining the boundary between the concentrate and the tailings. The image analysis device 80 sends a command to the sorting plate drive mechanism 60 based on the analyzed result, and performs control for arranging the sorting plate 40 at an appropriate position.

  By performing such an operation, it is possible to sort the supplied ore 100 and classify it into concentrate and tailing while moving the sorting plate 40 to an appropriate position according to the beneficiation state. The camera 70 and the image analysis device 80 are not essential, and may be provided as necessary.

  Next, the sorting plate 40 according to Embodiment 1 of the present invention will be described in detail.

  FIG. 2 is a diagram illustrating an example of the sorting plate 40 according to the first embodiment of the present invention. 2A is a front view of the sorting plate 40 viewed from the left side surface of the vibration table 10 in FIG. 1, and FIG. 2B is a front view of the vibration table 10 in FIG. 4 is a side view of a sorting plate 40. FIG.

  As shown in FIGS. 2A and 2B, the sorting plate 40 according to this embodiment includes a partition plate 41, a partition plate piece 41 a, a partition plate base 42, a liquid supply member 43, and a nozzle 44. Is provided. Moreover, the hose 50 is shown as a related component. The sorting plate driving mechanism 60 includes a motor 61 and a single-axis unit 62. Furthermore, as related components, the vibration table 10, the concentrate storage tank 20 and the concentrate discharge hose 21, the tailings storage tank 30 and the tail discharge hose 31, the hose 50, the concentrate 101, and the tail Ore 102 is shown.

  As shown in FIG. 2B, the sorting plate 40 is provided so as to stand substantially vertically on the surface of the vibration table 10, but between the bottom surface of the sorting plate 40 and the surface of the vibration table 10. Is provided with a gap G. By providing such a gap G, the sorting plate 40 can be moved by the sorting plate driving mechanism 60 without contacting the vibration table 10 in the horizontal direction. The gap G can be variously set according to the application, but may be set to, for example, about 0.3 to 2 mm, preferably about 0.5 to 1 mm.

  2A and 2B, the partition plate 41 is a plate for classifying the ore grains 100 into concentrates 101 and tailings 102 and sorting them, and functions as a boundary wall. As shown in FIG. 2A, the concentrate 101 is recovered on the left side of the partition plate 41, and the tailing 102 is recovered on the right side of the partition plate 40. The partition plate base 42 is a support plate that serves as a base for the partition plate 41. Further, the partition plate small piece 41 a is a portion that is attached to the partition plate base 42, protrudes inward and lower than the partition plate base 42, and is in contact with the liquid and the mineral grains 100 supplied on the vibration table 10. Hereinafter, the partition plate small piece 41a and the partition plate base 42 are not particularly distinguished from each other, and are referred to as the partition plate 41 as a whole.

  The liquid supply member 43 is a member for supplying the liquid supplied from the hose 50 to the gap G between the partition plate 41 and the vibration table 60. The liquid supply member has a liquid supply port 43a on its bottom surface, and supplies the liquid supplied from the hose 50 via the liquid supply port 43a. In addition, the liquid supply port 43a is configured so that the supplied liquid passes through the bottom surface of the partition plate 41, so that the fine concentrate 101 does not stay in the gap G from the place along the side surface of the partition plate 41. Supply. That is, it is preferable that the liquid supply port 43 a is provided at a location in the vicinity of the partition plate 41 that is not so far from the partition plate 41.

  The liquid supply member 43 can be configured in various shapes as long as the liquid supplied from the hose 50 can be supplied along the side surface of the partition plate 41. For example, the liquid supply member 43 supplies liquid to the bottom surface. You may comprise like the flat container in which the opening | mouth 43a was formed.

  The liquid supply member 43 and the liquid supply port 43a are preferably provided on the tailing side surface of the partition plate 41. Thereby, it is possible to prevent the concentrate 101 from being mixed with the tailings 102 beyond the gap G. That is, it is possible to reliably prevent the concentrate 101 from being mixed with the tailings 102 side by providing a wall on the tailings side from the bottom of the partition plate 41 by the liquid flow.

  The nozzle 44 is a member for supplying liquid from the hose 50 to the liquid supply member 43. As shown in FIG. 1, the hose 50 may be provided with a flow rate adjustment valve 51 to adjust the supply amount of the liquid to be supplied. For example, the liquid supply amount may be 1 to 3 liters per hour, for example, around 2 liters. Also, the liquid to be supplied may be various liquids depending on the application, but for example, water may be used. When water is supplied, the hose 50 may be connected to a faucet instead of the flow rate adjustment valve 51 so that the flow rate is adjusted by the faucet.

  The concentrate 101 recovered by the concentrate-side storage tank 20 is recovered via a concentrate discharge hose 21, and the tailing 102 recovered by the tailing-side storage tank 30 is connected via a tailings discharge hose 31. Collected.

  Further, the sorting plate 40 including the partition plate 41 can be made of various materials depending on the application, but may be made of, for example, polyvinyl chloride. By using such a material, the sorting plate 40 can be smoothly moved on the vibration table 10 when the concentrate 101 and tailing 102 are separated.

  In the present embodiment, the sorting plate 40 is configured to be driven by a partition plate driving device 60. As such a partition plate driving device 60, the fulcrum of the sorting plate 40 can be moved back and forth with respect to the vibration table 10 by the servo motor 61 or the like via the single-axis unit 62, and sorting is performed with the fulcrum as the center. The plate 40 is rotated so that the edge opposite to the fulcrum is in contact with the concentrate side edge of the vibration table 10, and the sorting plate 40 is placed in a predetermined range along the concentrate side edge of the vibration table 10. An existing drive mechanism that is movable can be used.

  According to the sorting plate 40 according to the present embodiment, by providing the liquid supply member 43 having the liquid supply port 43a, the fine concentrate 101 enters the gap G between the partition plate 41 and the vibration table 10, and bites. It is possible to prevent the operation failure of moving the partition plate 41 due to the insertion. Further, by providing the liquid supply member 43 on the tailing recovery side, mixing of the concentrate 101 with the tailing 102 can be prevented, and the recovery rate of the concentrate 101 can be increased.

  As shown in FIG. 2 (B), in the table specific gravity sorter according to the present embodiment, the side of the upper end portion of the vibration table 10 provided with the sorting plate 40 has a rounded shape with rounded corners (or R). A round shape portion R configured in a shape). The partition plate 41 does not have a tip E extending toward the center of the vibration table 10 inward of the inner end of the rounded shape portion R, and is within the range of the rounded shape portion R in a top view. It is configured to be. That is, the front end portion E of the partition plate 41 is configured to be located on the outer side than the location where the vibration table 10 starts to tilt.

  By configuring the sorting plate 40 so that the front end portion E of the partition plate 41 is within the range of the rounded shape portion R, when the ore grains 100 are poured into the water, the vibration table is formed at the front end of the partition plate 41. Thus, the water flowing over the water 10 is blocked, and water can be prevented from collecting at the tip of the partition plate 41.

  FIG. 3 is a diagram for explaining in more detail the shape of the partition plate of the sorting plate according to the first embodiment of the present invention. FIG. 3A is a top view of the sorting plate according to the first embodiment, FIG. 3B is a side view of the sorting plate according to the comparative example, and FIG. It is a side view of the sorting board which concerns.

  FIG. 3B shows a partition plate 141 according to a comparative example, and FIG. 3C shows a partition plate 41 according to the first embodiment. Both the partition plate 141 according to the comparative example and the partition plate 41 according to the first embodiment are provided above the vibration table 10, but toward the center side of the vibration table 10 of the partition plate 41 according to the first embodiment. While the extending length is short and the tip E is at the same position as the tilt start point S of the vibration table 10, the partition plate 141 according to the comparative example is longer than the partition plate 41, and the tip E1 is It exists inside the inclination start point S. As in the front end portion E1 of the partition plate 141 according to the comparative example, when it exists inside the tilt start point S, the water flowing through the flat portion on the vibration table 10 is blocked by the partition plate 141, and the water flows into the front end portion E1. The phenomenon of accumulating occurs.

  On the other hand, in the partition plate 41 according to Embodiment 1 shown in FIG. 3C, the water that flows through the flat portion of the vibration table 10 is not blocked, and the water flows down along the inclination of the rounded shape portion R. Water does not accumulate in E, and water can flow smoothly. As described above, in the sorting plate 40 according to the first embodiment, the tip portion E of the partition plate 41 is arranged at the same point as the inclination start point S of the rounded shape portion R, thereby allowing water to flow out smoothly and concentrate. And it is possible to eliminate the catch of the tailings and increase the recovery efficiency of the concentrate.

  Moreover, as shown to FIG. 3 (A), as for the partition plate 41 of the sorting plate 40 which concerns on Embodiment 1, the front-end | tip part E has a pointed shape as a whole. Further, a tip E is disposed at the same position as the tilt start point S of the vibration table 10. Thereby, in FIG. 3 (A), water flowing from the upper left side is allowed to flow out without being caught, and only concentrates having a small specific gravity can be efficiently recovered.

  Moreover, in FIG. 3 (A), the partition plate 141 which concerns on the comparative example shown to FIG. 3 (B) is shown by the side of the partition plate 41 which concerns on Embodiment 1. FIG. In the partition plate 141 according to the comparative example, the tip end portion E1 has a flat surface, and the tip end portion E1 is disposed inside the tilt start point S of the vibration table 10. With such a configuration, the outflow of water flowing through the flat portion of the vibration table 10 is hindered, and water accumulates at the tip E1, which prevents efficient recovery of concentrate.

  On the other hand, the partition plate 41 according to the first embodiment has the tip E at the same position as the tilt start point S of the vibration table 10, and the shape of the tip E is the same direction as the water flowing through the flat part of the vibration table 10. Therefore, it is possible to prevent the tailings from being mixed with the concentrate without disturbing the flow of water.

  In addition, it is preferable that the partition plate 41 according to the first embodiment is used by being moved to the right side, rather than when the partition plate 141 according to the comparative example is used. This is because the point at which the concentrate is collected needs to be closer to the right side by the amount of entry into the inside of the partition plate 41.

  Moreover, in order to avoid damaging a human skin with the sharp front-end | tip in the front-end | tip part E of the partition plate 41 which concerns on Embodiment 1, the flat surface F may be formed. Even if it has a shape having a flat surface F at the most distal portion of the partition plate 41, the tip end portion E has a sharp shape as a whole, so that it can efficiently flow out without disturbing the flow of water. Can do.

  In addition, the sharp direction is preferably a sharp shape along the flow of water, but if the shape is sharp toward the approximate center of the vibration table 10, an effect that does not hinder the flow of water is obtained. It is not always necessary to have a sharp shape along the direction of water flow.

  In addition, although the thickness of the partition plate 41 may be various thickness according to a use, the thickness which can form a sharp inclined surface is required, for example, the partition plate 41 whole is about 3-6 mm. For example, it may be 4 mm. In this case, both the partition plate small piece 41a and the partition plate base 42 may be configured to be 2 mm each. In this case, for example, the thickness of the portion constituting the inclined surface is 1.5 mm, the thickness constituting the flat surface F is 0.5 mm, and the flat surface F: the thickness of the inclined surface is 1: 3. You may comprise.

  Further, in FIG. 3, the tip portion E of the partition plate 41 has been described with reference to an example where the tip portion E is at the same point as the tilt start point S of the vibration table 10. If it exists in an area | region, it can arrange | position in arbitrary positions.

  2 and 3, an example in which the corner of the upper end portion of the side of the vibration table 10 is rounded to form a rounded shape portion R has been described. However, an inclination capable of dropping the liquid is formed. Therefore, it can be configured as various inclined surfaces including a linear inclination, and can be configured as various inclined portions.

  As described above, the sorting plate 40 according to the present embodiment can not only reduce the biting of fine mineral grains at the bottom surface of the partition plate 41 but also start the inclination of the vibration table 10 at the position of the tip E of the partition plate 41. While making it the same as the point S or outside it, and making the front-end | tip part E into the pointed shape along the flow of water, the collection | recovery efficiency of a concentrate can also be improved.

  Returning to FIG. As shown in FIG. 1, in the table specific gravity sorter according to this embodiment, a camera 70 is installed above the vibration table 10. As described above, the sorting plate 40 may be positioned based on the beneficiation state on the vibration table 10 captured by the camera 70 as necessary. Any camera 70 can be used as long as it can be used in an existing binarized image processing system, and a captured image such as a still image capturing device such as a digital camera or a moving image capturing device such as a digital video camera can be used as data. Can be exemplified.

  The camera 70 is electrically connected to the image analysis device 80, and outputs captured data to the image analysis device 80. As the image analysis device 80, in addition to a combination of hardware such as an existing server or personal computer and software for binary image processing, a dedicated binary image processing device or the like can be used. The image analysis apparatus 80 binarizes the input image data and obtains black and white (0 or 1) binary image data based on the situation on the board. The binary image data can be displayed through the monitor of the image analysis device 80 or an external monitor.

  The threshold value for binarization is appropriately set or selected in advance according to the type of ore to be beneficiated, the content of high specific gravity ore in concentrate (concentrate recovery). Usually, in the existing beneficiation, it is preferable to adjust so that this threshold is set at the boundary between the range of concentrate and the range of single blade. Further, it is preferable that a test is performed before the operation is started so that the threshold value can be appropriately adjusted by the image analysis apparatus 10 for each operation.

  For example, if necessary, the mineral grains 100 may be irradiated by single-wavelength illumination, the camera 70 may be provided with an optical filter, or a near-infrared camera may be used as the camera 70. For example, in the case where two or more kinds of ore grains having similar light reflectance are mixed, it may be difficult to adjust the threshold value. Even in such a case, by adopting the above-described configuration, it is possible to selectively emphasize and photograph only the target mineral grains, and the threshold value can be easily adjusted.

  More specifically, when natural gold and pyrite steel or arsenite are mixed in the ore, although the reflectance of these light is approximate, natural gold is 800 nm or more in comparison of the absorption wavelength. However, pyrite and arsenite tend to absorb such long-wavelength light. Therefore, for example, by irradiating the mineral grains with an LED light source having a wavelength of 850 nm, only natural gold can be clearly photographed. A similar effect can be obtained by attaching an optical filter to the camera 70 or using the near-infrared camera having good sensitivity to long wavelength light.

  In this way, the camera 70 and the image analysis device 80 may be provided as necessary, and the position of the sorting plate 40 may be controlled based on the imaged beneficiation state on the vibration table 10. At that time, if necessary, an optical filter or a near infrared camera may be used.

  According to the sorting plate 40 and the table specific gravity sorter using the same according to the first embodiment, even if the sorting plate 40 frequently moves during the beneficiation, water is put in the gap G between the partition plate 41 and the vibration table 10. By performing the beneficiation while flowing a liquid such as, it is possible to prevent the fine concentrate 101 from being caught in the gap G. Thereby, it is possible to prevent the concentrate 101 from acting as an abrasive and to extend the life of the partition plate 41 and the vibration table 10.

[Embodiment 2]
FIG. 4 is a view showing an example of a sorting plate 45 according to Embodiment 2 of the present invention. In the sorting plate 45 according to the second embodiment, the sorting plate 40 according to the first embodiment is provided with a gas supply nozzle 46 instead of the liquid supply member 43 on the side of the partition plate 41 on the tailing recovery side. Is different. Thus, it is good also as a structure which supplies not only a liquid but gas to the clearance gap G between the partition plate 41 and the vibration table 10. FIG. The gas supply nozzle 46 is connected to the gas supply pipe 52 and configured to supply gas. The gas supply pipe 52 is provided with a flow rate adjusting valve 53 so that the flow rate of the supplied gas can be adjusted.

  When gas is ejected from the gas supply nozzle 46 with the supply port 46a facing downward, the gas colliding with the vibration table 10 spreads in the horizontal direction, and the fine concentrate 101 is blown off by the gas flow, and the partition plate 41 and the vibration table Thus, it is possible to prevent the fine concentrate 101 from being deposited in the gap G between the two.

  In FIG. 4, the supply port 46 a of the gas supply nozzle 46 faces directly below, but is arranged to be inclined on the side of the partition plate 41 (inside) within a range of greater than 0 degree and less than 45 degrees. Also good. Thereby, it becomes possible to increase the airflow of a horizontal direction component.

  A plurality of gas supply nozzles 46 may be provided in the depth direction of the partition plate 41. Moreover, the gas supplied may be selected according to a use, for example, may be air, nitrogen, or an inert gas.

  Since the configuration other than the sorting plate 45 may be the same as that of the table specific gravity separator according to the first embodiment, the description thereof is omitted.

  Moreover, it cannot be overemphasized that the front-end | tip part of the partition plate 41 may be comprised similarly to Embodiment 1, and may be comprised so that concentrate efficiency may be improved.

  According to the sorting plate 45 and the table specific gravity sorter according to the second embodiment, it is possible to prevent malfunction due to the biting of the fine concentrate 101 between the partition plate 41 and the vibration table 10 using gas. Thereby, it is possible to prevent the concentrate 101 from acting as an abrasive and to extend the life of the partition plate 41 and the vibration table 10.

[Embodiment 3]
FIG. 5 is a view showing an example of the sorting plate 47 according to the third embodiment of the present invention. In the sorting plate 47 according to the third embodiment, the sorting plate according to the second embodiment is provided in that the gas supply nozzle 48 is provided not only on the side on the tailing recovery side of the partition plate 41 but also on the side on the concentrate recovery side. It is different from 45.

  The supply port 48a of the gas supply nozzle 48 faces downward, and the gas supply nozzle 48 is connected to a gas supply pipe 54 so that gas can be supplied. The gas supply pipe 54 is provided with a flow rate adjustment valve 55 so that the flow rate can be adjusted.

  As described above, the gas supply nozzles 46 and 48 may be provided on both sides of the partition plate 41. In the case of gas, since the force to blow off the fine concentrate 101 that is finer than the liquid may be weak, walls are formed by airflow on both sides of the partition plate 41, and the gap G between the partition plate 41 and the vibration table 10 It is good also as a structure which prevents the penetration | invasion of the fine concentrate 101. FIG.

  Note that a plurality of gas supply nozzles 46 and 48 may be provided in the depth direction of the partition plate 41. In addition, both the gas supply nozzles 46 and 48 may be arranged such that the supply ports 46a and 48a are inclined toward the partition plate 41 (inner side) in a range of greater than 0 degree and less than or equal to 45 degrees.

  Further, the gas supply pipes 52 and 54 and the flow rate adjusting valves 53 and 55 may be integrated into one to supply gas to both the gas supply nozzles 46 and 48. Further, the gas to be supplied may be selected depending on the application, and may be air, nitrogen or an inert gas, for example.

  Since the configuration other than the sorting plate 47 may be the same as that of the table specific gravity separator according to the first embodiment, the description thereof is omitted.

  Moreover, it is the same as that of the sorting plate 45 concerning Embodiment 2 that the front-end | tip part of the partition plate 41 may be comprised similarly to Embodiment 1, and you may comprise so that concentrate efficiency may be improved.

  According to the sorting plate 45 and the table specific gravity sorter according to the third embodiment, gas is supplied from both sides of the partition plate 41, and operation failure occurs due to the fine concentrate 101 being caught between the partition plate 41 and the vibration table 10. Can be prevented. Thereby, it is possible to prevent the concentrate 101 from acting as an abrasive and to extend the life of the partition plate 41 and the vibration table 10.

  The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the above-described embodiments, and various modifications and substitutions can be made to the above-described embodiments without departing from the scope of the present invention. Can be added.

DESCRIPTION OF SYMBOLS 10 Vibration table 40, 45, 47 Sorting plate 41 Partition plate 43 Liquid supply means 43a Liquid supply port 46, 48 Gas supply nozzle 46a, 48a Supply port 50 Hose 51, 53, 55 Fluid adjustment valve 52, 54 Gas supply pipe 60 Sorting Plate drive mechanism

Claims (18)

In a specific gravity beneficiation using a vibration table, a sorting plate used when sorting concentrate and tailing,
A partition plate disposed with a minute gap between the surface of the vibration table;
And a fluid supply means provided on the partition plate and configured to supply fluid to the gap.   The sorting plate according to claim 1, wherein the fluid supply means includes a supply port that supplies the fluid to the gap.   The sorting plate according to claim 1 or 2, wherein the fluid is a liquid.   The sorting plate according to claim 3, wherein the fluid supply means is provided on one side surface of the partition plate.   The sorting plate according to claim 4, wherein a side surface on one side of the partition plate is a side surface on a side for sorting tailings.   The sorting plate according to claim 4 or 5, wherein the fluid supply means is a flat container provided in contact with one side surface of the partition plate and has the supply port on the bottom surface.   The sorting plate according to any one of claims 3 to 6, wherein a hose for supplying the liquid is attached to the fluid supply means.   The sorting plate according to any one of claims 1 to 7, wherein the sorting plate is attached to a driving mechanism and is movable by the driving mechanism.   The sorting plate according to claim 2, wherein the fluid is a gas.   The sorting plate according to any one of claims 1 to 9, wherein the partition plate has a tip shape including a tip extending toward a center side of the vibration table as a whole.   The said front-end | tip part of the said partition plate has the shape where the surface of the said concentrate side is longer than the surface of the said tailings side, and sharpened toward the center side of the said vibration table as a whole. Sorting board.   The sorting plate according to claim 10 or 11, wherein a flat portion from which a complete sharpness has been removed is formed at the forefront of the tip portion. The vibration table has an inclined portion that is inclined by removing the corner of the upper end portion of the side where the partition plate is provided,
The sorting plate according to any one of claims 1 to 12, wherein the partition plate has a tip extending toward a center side of the vibration table arranged at a position where the inclination of the inclined portion starts or outside the position.   14. The sorting plate according to claim 13, wherein the inclined portion is configured as a rounded shape portion that is rounded. A vibration table,
A ruffle provided on the surface of the vibration table;
A table specific gravity sorter having a sorting plate according to any one of claims 1 to 14 arranged along an edge of the vibration table. In specific gravity beneficiation using a vibration table, a specific gravity beneficiation method that sorts concentrates and tailings using partition plates,
The partition plate is arranged so that a minute gap is formed between the bottom surface of the partition plate and the surface of the vibration table,
A specific gravity beneficiation method that performs the table specific gravity beneficiation while supplying fluid to the gap.   The specific gravity separation method according to claim 16, wherein the fluid is a liquid.   The specific gravity beneficiation method according to claim 17, wherein the liquid is supplied from a side for sorting the tailings.

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