JPH0833854A - Movable net type dressing device - Google Patents

Abstract

PURPOSE:To enable sepn. of ores for which high selection accuracy is needed and to obviate generation of imbalance in ore distribution by connecting plural pieces of net bodies by soft couplers to form a movable net and generating oscillation patterns by adjusting the oscillation periods and amplitude of the net bodies. CONSTITUTION:Plural pieces of the divided net bodies 3A, 3B are coupled to each other by the soft couplers 4, such as rubber plates, having a network structure to form the movable net 3. This movable net is fitted in a freely oscillating state into a water tank 2. The movable net 3 is oscillated by upper and lower driving devices 6A, 6B fixed to a basic structure 7. A controller sends the signals for oscillation control of the upper and lower driving devices 6A, 6B and sends the signals to discharge devices 9A, 9B from the information on the treating amt., sp. gr. distribution, grain size distribution, etc., of raw ore 20 to be supplied, thereby adjusting the oscillation of the net bodies 3A, 3B and adjusting the discharge rate of hard 23, No. 2 coal 22. Then, the imbalance in the ore distribution on the movable net is eliminated and the sepn. of the ore with good accuracy is made possible.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a movable net-type beneficiation apparatus applicable to mining machinery products, such as a beneficiation equipment or a beneficiation equipment for useful metal ores.

[0002]

2. Description of the Related Art There is an apparatus for separating coal or mined metal ore mined from underground by utilizing a difference in specific gravity.

FIG. 5 and FIG. 6 show such a beneficiation.
Is a typical example of a conventional movable net-type beneficiation device for
Longitudinal sectional view showing the structure of the cock-type jumping machine and the swinging part
FIG. In the figure, the water tank 02 is fixedly installed.
The main part of the rafting mechanism, which will be described later, is installed below it.
ing. In addition, (C₁~ C₆) Partition
There is a partition C₁~ C ₆Space above the
There is a rafting box 03 (movable net) with a bottom plate in a net structure.
Have been.

The net of the jumping box 03 is divided so as to correspond to the intervals C _{1 to} C ₆ and has a net structure of a perforated plate or a woven net. In addition, at the upper end of the side plate 04 that constitutes the jump box 03, there are two side plates 04 on the both sides in the left-right direction of the drawing (before and after the right side of the drawing is the front), a total of four metal pieces 05 being side plates. It is provided so as to project from 04 or a structure separate from the side plate 04 is fixed to the side plate 04.

Further, a shaft 06, which is slightly longer than the width of the water tank 02, is horizontally provided so as to pass through the upper parts of the metal products 05 at two opposite sides, and the metal products 05 are suspended on the shaft 06. . On the other hand, its axis 06 is close to both ends of the arm 07
Is supported by the side plate of the water tank 02. In other words, the arm 07 can swing one end connected to the shaft 06 to the left and right around the pivot point 08 provided on the side plate of the water tank 02. Both ends of the shaft 06, apart from the arms 07, are supported outside the water tank 02 by vertical bars 09. Thus, the vertical rod 09 supports the weight of the vault box 03 with the help of the arm 07, and the arm 07 rotates about the pivot point 08, and the vault box 03 is connected via the shaft 06 connected to one end. It defines the locus of movement around the pivot point 08 of. The vertical rods 09 are provided at two positions in front and rear, each pair of left and right standing upright outside the water tank 07, and their lower ends 010 are horizontal rods (not shown) that cross below the water tank 02. Are linked by.

The center of the horizontal rod is connected to the horizontal rods 011 and 012 which are orthogonal to the horizontal rod. The front and rear rods 011 and 012, which are respectively connected to the horizontal bars, rotate around fulcrums 013 and 014, respectively, and are located behind the fulcrum 013 and fulcrum 01.
In front of 4, there is a rafting box 0 loaded via a vertical rod 09.
Weights 015 and 016 for balancing the weight of No. 3 are connected.

A cam 017 having a pawl around the horizontal shaft is provided at the front end (right end) of the lathe rod 011 and the rear end (left end) of the lathe rod 012 which face each other. There is. The cam 017 rotates and the claws installed around
If you touch the tip of No. 1 or the rear end of Ladle 012, Lathe 0
The front end of 11 or the rear end of the rod 012 moves upward.
At this time, the weight of the jumping box 03 is applied to the horizontal rod via the vertical rod 09, and the weights 015, 01 provided on the rods 011, 012 are loaded.
Keep in balance with 6.

That is, for example, when the cam 017 rotates and the front vertical rod 09 is raised via the lever 12, the front shaft 06 on which the front of the jumping box 03 is suspended is centered on the pivot point 08. And move in the shape of an arc whose radius is the length of the arm 07. As a result, the front part of the jump box 03 is lifted up and operates in the same manner as the shaft 06 that moves forward. Further, when the claw of the cam 017 is disengaged from the ladle 012, the jumping box 03 is lowered by its own weight through the reverse path. Thus, the front part of the jumping box 08 performs a slanting up-and-down jumping motion, and the rear part of the jumping box 08 performs substantially the opposite motion.

Further, when the cam 017 is rotated and the rear vertical rod 09 is flipped up via the lever rod 011, the jumping box 0
The same applies to the jumping motion in the rear part of 3.

The pivot point 08 is fixed to the side plate 04 of the water tank 02, but the fixed position can be moved up and down. By selecting the fixed position, it is possible to change the magnitude of the horizontal and vertical movements of the jumping box 03, and thereby, the sorting action on the ore performing the beneficiating operation and the speed at which it passes through the jumping box 03 are adjusted. It is sent. The movement of the jumping box 03 is 180 to 200 per minute, and increasing the number increases the capacity. Also, if the diagonal up and down movement is decomposed into up and down and front and back, the up and down movement is 10 to 20.
mm, back and forth movement is about 20 mm.

However, in the Hancock type rafting machine described above, like the coal preparation device for selecting the mined coal,
Depending on the type of coal, the particle size, and the processing speed, the amplitude of the rocking motion of the rafting box 03, and the beneficiary that requires a fine adjustment of the cycle,
Due to its mechanism, it is difficult to make fine adjustments, and it is impossible to make the vault box perform a delicate motion that is optimal for sorting, and there is a problem that sorting accuracy cannot be achieved.

Further, in order to increase the beneficiation processing amount,
It is necessary to widen the horizontal width of the jump box 03 (movable net) for beneficiation, but if the width of the movable net is widened, the distribution of the ore for beneficiation on the movable net will be affected by the unbalance of the supply amount and the particle size distribution. Imbalance occurs, and in order to eliminate it, it is necessary to make a difference in the left and right amplitudes. However, with the Hancock type jumping machine described above, this cannot be done, and it is difficult to increase the throughput in the end.

[0013]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems of the conventional beneficiation equipment and makes it possible to finely adjust the oscillation amplitude and oscillation cycle of a movable net for beneficiating coal. It can be used to sort ores that require fine sorting accuracy such as, and even if the width of the movable net is expanded to increase the throughput, an imbalance occurs in the distribution of the ore to be processed on the movable net. It is an object of the present invention to provide a movable net-type beneficiation device.

[0014]

Therefore, the moving net type beneficiation apparatus of the present invention uses the following means. (1) A movable net made up of nets which are connected to each other by a flexible coupling device and each of which can be individually operated by changing the amplitude and the swing period is provided. (2) A plurality of drive devices are installed on each net, and a drive device capable of generating an arbitrary swing pattern by applying an adjusted amplitude and swing cycle to each net is provided.

[0015]

With the above-mentioned means, the movable net-type beneficiation apparatus of the present invention can (1) widen the width of the movable net and increase the amount of beneficiate processing.
In addition, since the nets are connected by a flexible coupling device and can be operated by individually changing the amplitude and the swing cycle, even if there is an imbalance in the supply amount of the raw ore, there is also a difference in the particle size distribution. Even if they are supplied at the same time, they can be evenly distributed by the operation of individual nets, and the ore distribution for beneficiation on the movable net does not become unbalanced. (2) Since the nets that can be operated by individually changing the amplitude and swing cycle can individually swing in any pattern, it is possible to accurately select ores with subtle differences in specific gravity and grain size. It is possible to increase the processing speed.
In addition, this makes it possible to utilize for the sorting of ores such as coal which requires sorting accuracy, and to increase the value of the sorted ores.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a movable net type beneficiation apparatus of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing an embodiment in which the movable net type beneficiation apparatus of the present invention is applied to the selection of raw coal, and FIG. 2 is a perspective view of the movable net shown in FIG.

In the figure, reference numeral 1 is a supply device of unsorted coal, so-called raw coal 20, which is supplied onto the movable mesh type beneficiation device 3 in a two-phase liquid state in which the raw coal 20 is mixed with water.
Raw coal 20 shows the distribution when the specific gravity is plotted on the horizontal axis.
As shown in (A), it has a specific gravity distribution between coal (specific gravity 1.3) and rock (specific gravity 2.7). The movable net type beneficiation apparatus of the present embodiment selects the raw coal 20 by specific gravity, and the clean coal 2 in the specific gravity distribution state as shown in FIG. 3 (B).
The first and second coals 22 and 23 are sorted.

Reference numeral 2 denotes a water tank of the coal preparation apparatus, which has a watertight structure on the side surface and the lower surface and has water supply pipes 11 and 12 inside. Further, the lower surface of the water tank 2 is divided into two parts, and has a funnel structure formed by bottom plates 2A and 2B whose lower portions are gradually reduced in cross-sectional area. Further, partition plates 13 and 14 are provided along one side of the funnel structure, that is, along bottom plates 2A and 2B on which discharge devices 9A and 9B to be described later are provided. These partition plates 13 and 14 are used for the discharging device 9
The nets 3 which prevent the particles discharged from A and 9B from being dispersed in the water tank 2 and rotate the discharging devices 9A and 9B.
The backflow of water on A and 3B is prevented.

Reference numeral 3 denotes a movable net, which is fitted into the water tank 2 in a freely swinging state, has a bottom surface formed of a perforated plate, and is divided into front and rear two nets 3A, 3B and side walls 5A,
It is formed of 5B. In addition, the divided mesh bodies 3A, 3
B and the side walls 5A and 5B are connected to each other by a flexible connecting device 4. The flexible coupling device 4 is formed of a rubber plate or the like having a stitch structure, and allows relative movement between the divided mesh body 3A, the side wall 5A and the mesh body 3B, and the side wall 5B.
The coal particles supplied above are prevented from leaking from this part.

Reference numeral 6 denotes an upper and lower driving device, which in this embodiment is integrated with the mesh body 3A and is integrated with and opposed to the side walls 5A provided above the side walls 5A 6A and 6C and the mesh body 3B. The four bases 6B and 6D above the side wall 5B are fixed to the base structure 7, and their movable shafts 8A, 8B, 8C and 8D are coupled to the side walls 5A and 5B of the nets 3A and 3B of the movable net 3, respectively. Has been done. As a result, the movable net 3 is swung mainly in the vertical direction by the vertical drive devices 6A, 6B, 6C, 6D.

Partitions 18A and 18B are provided at intervals from the rear edges of the nets 3A and 3B of the movable net 3, respectively. The rotary discharge devices 9A and 9B described above are provided in the lower portion between the trailing edge of the mesh body 3A and the partition 18A and between the trailing edge of the mesh body 3B and the partition 18B.

Numeral 10 is a float installed on the movable net 3, and floats 10A and 10C are placed on the net 3A and net 3B.
Floats 10B and 10D are respectively installed on the tops, and the specific gravity distributions of the coal seams on the nets 3A and 3B are detected and sent to the controller 19.

The control device 19 also takes into consideration operational information such as the throughput of the supplied raw coal 20, the specific gravity distribution, and the particle size distribution,
As shown in FIG. 4, vertical drive devices 6A, 6B, 6C, 6D
A swing control signal is sent to the discharge devices 9A and 9B to adjust the swing of the nets 3A and 3B, and the discharge speeds of the hard 23 and the No. 2 coal 22 are adjusted.

Reference numerals 15 and 16 denote hard (bottom) 2 provided below the bottom plates 2A and 2B forming the funnel structure of the water tank 2.
The temporary storage hoppers for No. 3 and No. 2 coal 22 are discharged to the outside of the device by an appropriately connected discharging device. 17 is clean coal 2
1 and the outflow part of water.

The moving mesh type beneficiation apparatus of this embodiment is constructed as described above, and when the raw coal 20 in the two-phase liquid state is fed from the feeding device 1 onto the moving mesh 3, the moving mesh 3 is constructed. The mesh bodies 3A and 3B are respectively composed of two vertical driving devices 6A and 6A.
It is connected to C and 6B and 6D, and is swung in the vertical direction. The amplitude, phase, and average position of vertical movement of the vertical drive units 6A, 6B, 6C, and 6D are controlled by the control unit 19 shown in FIG. 4 by the specific gravity distribution of raw coal, particle size, processing speed, clean coal, and second coal. In consideration of a number of related parameters such as the specific gravity, the nets 3A and 3B are independently controlled, and the nets 3A and 3B are respectively swung in an optimum operation pattern for coal preparation.

The distribution of the raw coal 20 on the nets 3A, 3B is detected from the driving reaction force of the driving devices 6A, 6B, 6C, 6D, and a feedback signal is sent to the control device 19. As a result, the control device 19 causes the nets 3A, 3B
By finely adjusting the vertical swing of the nets 3A, 3
The specific gravity stratification on B can be optimized.

Further, in the net body 3A, the floats 10A, 1
The discharge speed from the discharge device 9A is adjusted by the signal from the control device 19 which detects the boundary between the hard coal 23 and the secondary coal 22 by the signal from 0C, and the secondary coal 22 is mixed into the hopper 15 of the hard 23. Prevent that.

In the net body 3B, the floats 10B, 1
The discharge speed from the discharge device 9B is adjusted by the signal from the control device that detects the boundary between the secondary coal 22 and the clean coal 21 by the signal from 0D, and the secondary coal 22 is mixed into the clean coal 21. Prevent and maintain the quality of clean coal 21.

In the present invention, four driving devices 6A, 6B,
Since the vertical movements of 6C and 6D are independently controlled by the control device, the net body 3A and the net body 3B have a relative angle (speed), but this relative angle is absorbed by the flexible coupling device 4. Moreover, the movement of the movable net 3 is not a simple vertical movement,
By swinging partly including horizontal motion components, it becomes possible to make fine adjustments to the selection of coal particles and speed discharge.

The vertical movement waveform normally used in a coal separator is a sine wave, but if the process in which classification is performed (coal particle free-fall process) is lengthened to form a trapezoidal wave, classification efficiency is improved. be able to. In the present invention, by using a driving device capable of driving with an arbitrary waveform, driving with a trapezoidal wave is also easy, and classification can be performed efficiently.

In the above embodiment, the movable net 3 is 2
Although the mesh body composed of the individual mesh bodies 3A and 3B is shown, a larger number of sorts are performed by providing the third, fourth mesh bodies according to the present embodiment and swinging them individually. You can also do so.

In addition, one net has two vertical driving devices as the driving device.
It is also possible to provide the third, fourth, ... Driving devices for one net, and to swing the net more appropriately for sorting so as to perform more precise sorting.

Further, although the embodiment of the coal preparation device has been shown, the movable net type beneficiation device of the present invention is not limited to such an embodiment, and a device having an allowable range within the scope of the claims is used. It includes.

[0034]

As described above, the movable net-type beneficiation apparatus of the present invention has (1) the width of the apparatus can be widened and the beneficiation processing amount can be increased by the configuration shown in the claims. In addition, since the nets for beneficiation are connected by the flexible coupling device and can be operated by individually changing the amplitude and the swing cycle, even if there is an imbalance in the supply amount, different particle size distributions are simultaneously generated. Even if it is supplied, it can be evenly distributed by the operation of individual nets, and the ore distribution for beneficiation on the movable net does not become unbalanced. (2) In addition, since the net body that can be operated by individually changing the amplitude and the swing cycle can individually swing in an arbitrary pattern, it is possible to accurately obtain ores with delicate differences in specific gravity and grain size. It is possible to sort and increase the processing speed. In addition, this makes it possible to use it for the selection of ores such as coal which requires high sorting accuracy, and to improve the grade of the sorted ores.

[Brief description of drawings]

FIG. 1 is a side sectional view of a coal precipitator, which is an example of a movable net-type beneficiation device of the present invention,

FIG. 2 is an overhead view of the movable net shown in FIG.

FIG. 3 is a diagram showing a specific gravity distribution of raw coal to be sorted.
(A) is a specific gravity distribution of raw coal, FIG. 3 (B) is a specific gravity distribution of raw coal constituents in FIG. 3 (A),

FIG. 4 is a control block diagram of a control device that controls the device shown in FIG.

FIG. 5 is a side cross-sectional view of a Hancock-type jumping machine, which is a conventional movable net-type concentrator.

FIG. 6 is a perspective view showing a driving unit of the Hancock-type jumping machine shown in FIG.

[Explanation of symbols]

1 Supply Device 2 Water Tank 2A, 2B Bottom Plate 3 Movable Net 3A, 3B Net Body 4 Flexible Coupling Device 5A, 5B Side Wall 6, 6A, 6B, 6C, 6D Vertical Drive Device 7 Foundation Structure 8A, 8B, 8C, 8D Movable Shaft 9A , 9B Discharge device 10, 10A, 10B, 10C, 10D Float 11,12 Water supply pipe 13,14 Partition plate 15 Hard storage hopper 16 No. 2 coal storage hopper 17 Outflow part 18A, 18B Partition 19 Control device 20 Raw coal 21 Clean coal 22 No. 2 Charcoal 23 Hard

Claims (1)

[Claims] 1. A movable net-type beneficiation apparatus for performing a specific gravity selection of a raw ore supplied on a movable net that rocks in water, wherein the movable nets are composed of a plurality of nets connected to each other by a flexible joint device. In addition, a movable net-type beneficiation device characterized in that a plurality of drive devices for generating an arbitrary rocking pattern by adjusting a rocking cycle and an amplitude are installed in each of the net bodies.