JPH091072A - Plant for recovering raw stone - Google Patents

Abstract

PURPOSE: To prevent clogging in rough screening and the deterioration in raw stone recovery efficiency. CONSTITUTION: A sweeping device with a screen for adherent raw materials 10 is used for the rough screening of a raw material. In the primary roll screen 15 of the device 10, a rotary roller 16 is oscillated. The roller 16 is therefore oscillated and rotated simultaneously to increase the friction with the raw material so that raw stones in the raw material or powdery components such as mud and clay sticking to the roller 16 are scraped off. In this way, the clogging of the roller 16 is prevented, the powdery components are prevented from entering a crusher 51 in the subsequent process to be protected from troubles, and the deterioration in raw stone recovery efficiency can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rough ore recovery plant for recovering a product having a predetermined particle size from a raw material such as ore and limestone.

[0002]

2. Description of the Related Art For example, in a rough ore recovery plant for recovering limestone or the like from a raw material, the mined raw material is sieved and then finely crushed into a product. Conventionally, a comb tooth-shaped sieve (griz river) or a mesh-shaped sieve has been used in such a rough ore recovery plant for sieving and discharging a raw material.

This sieving step also has a function of extracting powder components such as mud and clay contained in the raw material. When the raw material contains a large amount of powder such as mud and clay, the crushing efficiency of the raw material decreases due to the buffering action of the powder when the raw material is crushed, and the powder crushing device (crusher), etc. It is necessary to remove the powder as it may get into the gap between the components of the equipment and cause failure.

[0004]

However, in the conventional grizzly river or mesh-like sieve, the powder content contained in the raw material adhering to the grizzly river or mesh was scraped off with a stick or the like. Depending on the amount of water, it is inevitable that powder will adhere to the product, which will significantly reduce the sieving performance and cause the equipment in the subsequent stages to malfunction, which will reduce the recovery efficiency of the rough recovery plant. It was

Therefore, an object of the present invention is to solve the above-mentioned problems. In the sieving process, powder components adhere to each part to lower the sieving performance, and powder components flow to the equipment in the subsequent stage, resulting in failure. An object of the present invention is to provide a gemstone recovery plant that can prevent the occurrence of such a phenomenon and can prevent the reduction of the gemstone recovery efficiency.

[0006]

The above object of the present invention is to provide a hopper for accumulating and discharging a raw material supplied from the outside,
A pan deck for conveying the raw material discharged from the hopper, and a primary roll screen in which a plurality of rotating rollers for sieving the raw material conveyed by the pan deck are arranged at predetermined intervals, and the pan deck and A dispensing device with an adhesive raw material sieving machine having an oscillating means for vibrating the primary roll screen is provided,
A primary crushing means for crushing the raw material having a predetermined particle size or more discharged from the adhesive raw material screening device dispensing device is provided, and a predetermined sieving by the adhesive raw material screening device dispensing device is performed. A secondary roll screen for secondary sieving the raw material having a particle size less than and the raw material crushed by the primary crushing means is provided, and a predetermined particle size or more discharged by the secondary roll screen Secondary crushing means for crushing the raw material is provided, and the raw material sieved by the secondary roll screen and having a particle size smaller than a predetermined particle size and the raw material crushed by the secondary crushing means are mixed and recovered. Means for collecting mixed particles, or a fine particle for separately recovering the raw material having a particle size smaller than a predetermined size screened by the secondary roll screen and the raw material having a predetermined particle size or more discharged from the secondary roll screen. Grain Either one of the coarse recovery means, or that both are provided can be achieved by rough recovery plant according to claim.

The above object of the present invention is achieved by a rough ore recovery plant characterized in that the primary roll screen changes in frequency from the rotary roller on the inflow side of the raw material to the rotary roller on the discharge side. You can Further, the above object of the present invention can be achieved by a gemstone recovery plant characterized in that the primary roll screen changes in amplitude from the rotary roller on the inflow side of the raw material to the rotary roller on the discharge side. .

[0008]

In the present invention, since the rotating roller of the primary roll screen for sieving the raw material vibrates at the same time as it rotates, the combined action of the rotational motion and the vibration works, and it is sent from the pan deck to the primary roll screen. Friction due to relative movement between the raw material and the rotating roller is increased, and this ensures that the powder components such as mud and clay contained between the raw materials and adhering to the rough stone in the raw material are separated from the rough stone. Be screened. This can prevent clogging of the primary roll screen and prevent deterioration of the recovery efficiency of the rough stones.

Further, the vibration or vibration applied to the rotating roller of the primary roll screen has its amplitude or frequency changed from the inflow side to the discharge side of the raw material, so that the raw material is more reliably discharged to the discharge side.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a rough recovery plant according to the present invention will be described in detail with reference to FIGS. FIG. 1 is a system diagram showing a rough recovery plant according to the present invention, FIG. 2 is a plan view of a dispensing device with a sieving machine for adhesive raw materials,
3 is a view from the arrow A of FIG. 2, FIG. 4 is a view showing the driving method of the rotary roll, FIG. 5 is a view from the arrow B of FIG. 2, and FIG. 6 is a description of the operation of the dispensing device with a sieve for adhesive raw materials. FIG. 7 is a sectional view showing another embodiment.

As shown in FIG. 1, a rough ore recovery plant 1 according to the present invention is provided with an adhering raw material sieving device 10 for sieving raw material 37 (FIG. 6). The raw material 37 having a predetermined particle size or more, that is, the raw material 37 having a size larger than the mesh size, discharged from the adhesive raw material sieving device with a sieving machine 10, is supplied to the primary crusher 51 to be crushed and finely sieved. It is supplied to the next roll screen 52. This secondary roll screen 52
A raw material having a particle size smaller than a predetermined particle size, that is, a raw material 37 smaller than the sieve mesh, which has been sieved by the dispensing device with a sieve for adhering raw material 10, is also supplied to. The dispensing device 10 with a sieving machine for adhesive raw materials will be described later.

On the secondary roll screen 52, the supplied raw material 37 is finely sieved. Then, the raw material 37 smaller than the mesh size of the secondary roll screen 52 is sieved here and supplied to the first flow direction switching unit 53. Also,
Raw material 37 larger than the sieve mesh of the secondary roll screen 52
Is discharged from here and the second flow direction switching unit 5
4 is supplied.

Then, the first flow direction switching section 53
Switches the flow direction of the supplied raw material 37,
It is adapted to be supplied to the recovery tank 55 or the second recovery tank 56. The second flow direction switching unit 54 switches the flow direction of the supplied raw material 37 and supplies it to the secondary crusher 57 or the third recovery tank 58. The raw material 37 crushed by the secondary crusher 57 is supplied to the second recovery tank 56.

That is, here, by switching the first flow direction switching unit 53 and the second flow direction switching unit 54, the product 60 having a particle size smaller than the predetermined particle size is recovered in the first recovery tank 55, and at the same time, the predetermined particle size. Whether the product 61 having a diameter equal to or larger than the diameter is recovered in the third recovery tank 58, or the mixed product 62 of the raw material 37 and the product 60 discharged from the secondary crusher 57 is recovered in the second recovery tank 56. You can choose.

Next, a dispensing device 1 with a sieving machine for adhesive raw materials
0 will be described. As shown in FIG. 2, this adhering raw material-equipped sieving machine 10 is provided with a hopper 11 for accumulating and discharging a raw material 37 (FIG. 6) supplied from the outside, and a pan deck on the discharge side thereof. 12 are arranged. The pan deck 12 is for transporting the raw material 37, and a flat plate 14 having a raised rear end is mounted on a lattice-shaped frame 13.

A primary roll screen 15 is arranged on the discharge side of the pan deck 12. The primary roll screen 15 is for sieving and dispensing the raw material 37, and a plurality of rotating rollers 16 are arranged at predetermined intervals. These rotating rollers 16 are rotatably attached to the side portions 17 and 18 supporting the frame portion 13 of the pan deck 12 either directly or through bearings. In order to prevent the raw material 37 on the pan deck 12 and the primary roll screen 15 from falling sideways, the upper ends of the side portions 17 and 18 are higher than the pan deck 12 and the primary roll screen 15.

Each rotary roller 16 of the primary roll screen 15 is provided with a plurality of circumferential grooves 19 having a predetermined width.
The circumferential groove 19 of each rotating roller 16 is aligned and arranged along the flow direction of the raw material 37, and the adjacent rotating roller 1
Gap 2 formed by 6 and 16 circumferential grooves 19, 19
0 is the sieve mesh. That is, the raw material 3 larger than the gap 20
The rough stones in 7 are conveyed to the end by the rotating roller 16 and discharged, and the rough stones in the raw material 37 smaller than the gap 20 and the powder components such as mud and clay are dropped by passing through the gap 20 to be sieved. Be divided.

On both sides 17 and 18 of the pan deck 12 are oscillating means, as shown in FIG. 3, the eccentric plate 2 in this example.
1, 22 are arranged. These eccentric plates 21, 22
The center of rotation at a position deviated from the center of gravity 39 of the
It is attached to both ends of a rotary shaft 23 which is rotatably attached to Nos. 7 and 18. A pulley 24 is mounted outside the eccentric plate 22 on one side of the rotating shaft 23.

On the other hand, a motor 25 is arranged at the lower left of the eccentric plate 22 in the figure. On the rotating shaft 26 of the motor 25,
A pulley 27 is attached. A belt 28 is wound around a pulley 24 of the center shaft 23 and a pulley 27 of the motor 25. Thus, the eccentric plates 21 and 22 are driven to rotate by the motor 25. Since the center of rotation of the eccentric plates 21 and 22 is deviated from the center of gravity 39, the eccentric plates 21 and 22 rotate to rotate the side parts 17 and 18, and thus the pan deck 12 and the primary roll screen 15 integrated with the pan deck 12.
Vibration is generated in the rotating roller 16.

In the above description of the oscillating means and the structure shown in the figure, the vibration is actually a rotary motion, and since the material cannot be dispensed well, the vibration is designed to be a linear motion. Although not shown in the figure for the sake of convenience, for example, the rotary shaft is divided into two shafts, and the shafts are rotated in opposite directions via gears or the like so as to generate linear motion.

As shown in FIG. 2, a motor 29 arranged outside the side portion 18 is connected to the rotary roller 16 on the outflow end side of the primary roll screen 15 via a universal joint, for example, a universal joint 30. There is. By using the universal joint 30, even if the rotating roller 16 vibrates, the rotating force of the motor 29 is applied to the rotating roller 1.
6 can be reliably transmitted.

Each rotary roller 16 has one sprocket 31 on the end side as shown in FIG.
The sprockets 32 and 33 are provided. That is, the rotating roller 16 at the inflow end is provided with one sprocket 31 only on one side. The second rotary roller 16 from the inflow end is provided with one sprocket 31 only on the side opposite to the inflow end rotary roller 16. The rotating roller 16 on the outflow end side is provided with one sprocket 31 on each side. The intermediate rotating roller 16 other than the above is provided with two sprockets 32 and 33 on one side at appropriate intervals. These sprockets 32 and 33 are provided on the same side for every other rotation roller 16.

One sprocket 31 of the rotary roller 16 on the outflow end side, which is directly driven to rotate by the motor 29, a lower sprocket 31 in the figure in this example, and a sprocket 32 inside the rotary roller 16 placed one by one. The chains 34 are wound. A chain 34 is wound around the sprocket 33 outside the sprocket 32 and the sprocket 31 of the rotating roller 16 that is placed one.

A chain 34 is wound around the other sprocket 31 of the rotary roller 16 on the outflow end side and the sprocket 32 inside the adjacent rotary roller 16. Sprocket 33 outside this sprocket 32
And the sprocket 3 on the outside of the rotating roller 16 on which one piece is placed.
3, a chain 34 is wound. Further, a chain 34 is wound around the sprocket 32 inside the sprocket 33 and the sprocket 31 of the rotating roller 16 on the outflow end side.

The number of teeth of the sprockets 31, 32, 33 is set so that the rotation speed gradually increases from the inflow end side rotation roller 16 to the outflow end side rotation roller 16. As a result, the raw material 37 is
Can be paid out reliably. Each rotating roller 16
Immediately underneath, as shown in FIG. 5, a cleaner 36 for holding a predetermined gap 35 with the rotary roller 16 is arranged. The cleaner 36 is formed in a comb shape with a flat plate.
Powder such as mud and clay adhering to the rotating roller 16 is
It is forcibly scraped off by the cleaner 36. Gap 3
5 can be easily adjusted according to the required particle size of the raw material 37 to be recovered, the raw material moisture, and the like.

Next, the operation of the dispensing device 1 with a sieving machine for adhesive raw materials will be described. As shown in FIG. 6, the raw material 37 accommodated in the hopper 11 is discharged to the pan deck 12. The pan deck 12 is vibrated in the direction from the lower left side to the upper right side in the drawing by the rotation of the eccentric plate 22, whereby the raw material 37 is conveyed to the primary roll screen 15 side. The transport amount of the raw material 37 of the pan deck 12 can be adjusted by changing the frequency or the amplitude.

Raw material 3 transported by pan deck 12
7 is supplied on the primary roll screen 15. Since the rotation speed of the rotary roller 16 of the primary roll screen 15 is gradually increased from the inflow side to the discharge side, the rough stone in the raw material 37 larger than the gap 20 between the circumferential grooves 19 is
Delivered and delivered reliably. The rough or the powder in the raw material 37 smaller than the gap 20 falls from the gap 20 and is sieved to be separated from the rough.

Further, since there is a difference in the number of rotations of the adjacent rotating rollers 16, the rough stones in the raw material 37 which are slightly larger than the gap 20 and remain between the rotating rollers 16 are the same as the rotating roller 1.
Rotate to the opposite side of 6. At this time, the friction between the remaining rough and the rotating rollers 16 on both sides thereof increases,
The corners of the rough are cut off and the rough becomes smaller. As a result, the remaining ore 37 falls from the gap 20 and is removed. Further, due to the friction between the rough stone and the rotary roller 16, dust particles such as mud and clay adhered to the rotary roller 16 and the rough stone are scraped off.

The vibration applied to the pan deck 12 for conveying the raw material 37 is also applied to each rotating roller 16 of the primary roll screen 15. This vibration acts so as to push the raw material 37 in the discharging direction, and gives the raw material 37 a rotational and flight motion. As described above, since the rotary roller 16 is vibrating and rotating, the vibration and the rotary motion are combined, the relative motion between the raw material 37 and the rotary roller 16 is increased, and the raw material 37 is rotated. It is sandwiched between, and powdered materials such as mud and clay are raw materials 37
Also, it can be prevented from adhering to the rotary roller 16. As a result, the dispensed ore hardly contains any powder, so that the powder invades each part of the next step, for example, a crushing device, and breaks down. It is possible to prevent a decrease.

When the powder content contained in the raw material 37 changes, especially when the fine particles and the water content increase, the self-cleaning action of the powder content cannot be expected, and the powder content on the rotary roller 16 adheres more. In this case, the powder attached to the rotating roller 16 is
Since it is scraped off by the cleaner 36 and is forcibly removed, it is possible to prevent a reduction in sieving performance. As described above, in the dispensing device 10 with a sieving machine for adhesive raw materials, the rotary roller 16 of the primary roll screen 15 used for sieving and dispensing the raw material 37 rotates and vibrates, so that the raw material 37 rotates. It is possible to reliably perform sieving and paying-out without staying between 16. Also, due to the rotation and vibration of the rotating roller 16,
Friction due to the relative movement between the rotating roller 16 and the raw material 37 increases, and the powder component attached to the rotating roller 16 is scraped off. Further, the powder that is not scraped off by the raw material 37 is forcibly scraped off by the cleaner 36. Therefore, it is possible to prevent the powder from entering into the respective parts of the crushing device in the next step, thereby causing a failure and preventing the crushing efficiency from being reduced due to the buffering action of the powder.

As described above, in the rough ore recovery plant of the present invention, the dispensing device with a sieving machine for adherent raw materials used for primary sieving does not deteriorate the sieving performance even with changes in raw material particle size and water content. In addition, since stable feeding of raw materials and coarse sieving (scalping) are possible, for example, raw materials containing a large amount of earth and sand, top soil (exfoliated soil), and coarse-grained raw materials (raw stone) by sieving and sieving construction soil It can be applied to recovery.

In the above-described embodiment, the case where the same frequency and amplitude are applied to the respective rotary rollers 16 of the dispensing device with a sieve for adherent raw material 10 has been described, but as shown in FIG. A bearing 39 is attached to each of 17 and 18 via a cushioning material such as rubber 38, and each rotating roller 16 is supported by this bearing 39, whereby each rotating roller 16
It is possible to change the frequency and amplitude applied to. That is, for example, it is possible to appropriately change the frequency and the amplitude of the rotating roller 16 by, for example, gradually decreasing the thickness of the rubber 38 from the inflow side rotating roller 16 to the outflow end side rotating roller 16. Become. Thereby, the dispensing of the raw material 37 can be performed efficiently. In addition,
As the cushioning material, an appropriate material other than the rubber 38 can be used.

In the above embodiment, the pan deck 12 is used.
Although the primary roll screen 15 and the oscillating means are integrated in the above description, the pan deck 12 and the primary roll screen 15 may be separated and the oscillating means may be separately provided. Thereby, the frequency and the amplitude of the pan deck 12 and the primary roll screen 15 can be set separately, and the amount of the raw material 37 conveyed by the pan deck 12 and the sieving and dispensing performance of the raw material 37 by the primary roll screen 15 are mutually influenced. No, it can be set separately.

[0034]

EFFECTS OF THE INVENTION In the rough ore recovery plant of the present invention, a dispensing device with a sieving machine for adhesive raw materials is used for primary sieving of raw materials, and the rotating roller of the primary roll screen vibrates simultaneously with rotation. The relative motion between the rough stone contained in the raw material and the rotating roller is increased to increase the friction, so that the rough stone is prevented from being pinched, and the powder component attached to the rotating roller is scraped off by the rough stone. Therefore, it is possible to prevent clogging of the primary roll screen and prevent deterioration of the sieving performance.
It is possible to prevent the efficiency of recovering rough stones from decreasing.

Further, the primary roll screen can appropriately change the frequency or the amplitude from the inflow side rotation roller to the discharge side rotation roller, whereby the rough stone in the raw material can be discharged more reliably. It will be possible.

[Brief description of the drawings]

FIG. 1 is a system diagram of a rough recovery plant according to the present invention.

FIG. 2 is a plan view of a dispensing device with a sieving machine for adhesive raw materials.

FIG. 3 is a view taken in the direction of arrow A in FIG. 2;

FIG. 4 is a diagram illustrating a method of driving a rotating roller.

5 is a view on arrow B of FIG. 2. FIG.

FIG. 6 is a view for explaining the operation of the dispensing device with a sieving machine for adhesive raw materials.

FIG. 7 is a sectional view showing another embodiment.

[Explanation of symbols]

 1 Gemstone Recovery Plant 10 Discharge Device with Sieving Machine for Adhesive Raw Material 11 Hopper 12 Pan Deck 15 Primary Roll Screen 16 Rotating Roller 21, 22 Eccentric Plate 25, 29 Motor 30 Universal Joint 36 Cleaner 51 Primary Crusher 52 Secondary Roll Screen 57 Secondary Crusher

Claims (3)

[Claims] 1. A hopper for accumulating and discharging a raw material supplied from the outside, a pan deck for conveying the raw material discharged from the hopper, and a primary sieving of the raw material conveyed by the pan deck. A primary roll screen in which a plurality of rotating rollers are arranged at a predetermined interval, and a dispensing device with an adhering raw material sieving machine having an oscillating means for vibrating the pan deck and the primary roll screen are provided. A primary crushing means for crushing the raw material having a predetermined particle size or more discharged from a sieving device with a sieving machine is provided, and the adhering raw material having a sieving device with a sieving machine for sieving less than the predetermined particle size A secondary roll screen for secondary sieving the raw material and the raw material crushed by the primary crushing means is provided, and the secondary roll screen Is provided with a secondary crushing means for crushing the raw material having a predetermined particle size or more discharged by, and crushed by the secondary crushing means and the raw material having a predetermined particle size sieved by the secondary roll screen Mixed particle collecting means for mixing and collecting the raw material, or a predetermined particle size or more discharged from the raw material and the secondary roll screen of less than a predetermined particle size sieved by the secondary roll screen A rough ore recovery plant, characterized in that either or both of fine and coarse particle recovery means for separately recovering the raw material are provided. 2. The rough ore recovery plant according to claim 1, wherein the primary roll screen has a frequency varying from the rotary roller on the inflow side of the raw material to the rotary roller on the discharge side. 3. The rough ore recovery plant according to claim 1, wherein the primary roll screen changes amplitude from the rotary roller on the inflow side of the raw material to the rotary roller on the discharge side.