JPH0123552Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a rod mill that crushes any raw ore with a predetermined number of rods housed in a shell body.
In particular, in a wet type rod mill, it is possible to increase the residence time of the raw stone to be crushed to ensure sufficient crushing action, and also to increase the crushing capacity by replacing the liner as appropriate without backflowing water. Furthermore, the present invention relates to a rod mill that can be rotated smoothly.

Conventionally, this type of rod mill has a predetermined number of rods housed in the shell body, which is rotated by an arbitrary drive device and supplies raw stone and water to the shell body, which crushes the raw stone with the rods and discharges it along with water from the discharge port. It has a structure.

However, its crushing ability is limited by the length of the shell itself.
That is, since it is greatly influenced by the time from when it is supplied to the shell body to when it is discharged, the length of the shell body has to be increased.

Therefore, a model was developed in which the rotating shaft of the shell body was installed at an angle so that the discharge port side was higher than the installation surface, increasing the residence time and increasing the crushing capacity and reducing the size of the shell. Although it has been
If the cylindrical shell body is installed at an angle like this, a large amount of water will inevitably accumulate on the supply port side, so unless the supply port has a special structure, the supplied raw stone and water will flow backwards and be discharged. It tends to happen.

Therefore, if raw stone and water are supplied little by little to prevent backflow, problems such as extremely poor stone crushing efficiency will occur.

In addition, since the rotation axis is inclined with respect to the installation surface,
Thrust is likely to occur due to the impact of the rod, making it difficult to obtain stable rotation, and there are also problems such as easy damage to the support mechanism and drive mechanism of the shell body.

Therefore, in order to very simply and effectively improve the above-mentioned problems that have arisen with conventional rod mills, the present invention provides a shell body with a truncated cone shape between both side walls, where the supply port side has a larger diameter than the discharge port side. None, the center of rotation is held by the drive unit so that it is horizontal, and the diameter of the discharge port provided at the center of rotation is larger than the diameter of the supply port, and the residence time of the raw ore to be crushed is increased to ensure sufficient It enables crushing action, increases stone crushing capacity and crushing efficiency without causing backflow of raw stones or water, and achieves miniaturization.Also, stable rotation is always obtained, and the drive mechanism and support mechanism are not damaged and are durable. The purpose of the present invention was to provide a rod mill that is highly flexible and has a liner that is suitable for use. It has a truncated conical shape with a larger diameter, and has a liner divided into at least a supply port side and a discharge port side on the inner circumferential surface, and at least a pair of outer rings protruding from the outer circumferential wall. It is rotatably supported with the center of rotation horizontally by a drive unit consisting of wheels, etc., and furthermore, the diameter of the discharge port is set larger than the diameter of the supply port at the center of rotation on the side plates on the supply port side and the discharge port side. A shell body made of a shell body, a hopper and a stone supply device arranged on the supply port side of the shell body so as to be able to supply any raw ore to the shell body, and a desired number of rods housed in the shell body to supply any raw ore. A sorting device is provided on the discharge port side of the shell main body so that the crushed material can be discharged from the discharge port and separated according to particle size, and the residence time of the raw ore to be crushed is extended. This is to enable sufficient crushing action and to prevent backflow within the main body.

Hereinafter, in order to further clarify the gist of the present invention, an embodiment of the present invention will be described with reference to the drawings.

The rod mill according to the present invention includes a hopper A for supplying raw stones, etc., a stone supply device B connected to the hopper A via a chute A1, and a stone supply device B for supplying raw stones in fixed quantities. A shell C that crushes the supplied rough stone, a drive section D that supports the shell C at a predetermined installation position and enables rotational driving, and a shell C that crushes the crushed stone crushed in the shell C to its particle size. It consists of a sorting device E that separates the parts according to the requirements.

In the shell C, the shell body 1 includes a side plate 11 provided with a supply port 111 and a side plate 13 provided with a discharge port 131.
In between, the cylinder body 12 is formed into a truncated cone shape with a diameter larger on the supply port 111 side than on the discharge port 131 side, and liner 14a,
14b and 14c are attached divided into three sets. Furthermore, a predetermined number of rods 3 are housed inside the shell body 1, and an outer ring body 2a of the same diameter is provided on the outer periphery of the shell body 1 to receive the drive of the drive section D.
2b is attached.

The liners 14a, 14b, 14c are made of a harder rubber than the central liner 14b, and the liners 14a, 14c on the supply port side and the discharge port side are replaceable.
Since the shell main body 1 has a truncated conical shape, the unfolded shapes of the shells 14b and 14c are fan-shaped.

Further, the supply port 111 and the discharge port 131 are arranged oppositely on the rotating shaft of the shell body 1, and the inner diameter of the discharge port 131 is made larger than the inner diameter of the supply port 111, so that the raw ore to be crushed can be crushed underwater. The residence time is extended to enable sufficient crushing action, and the shell body 1
It is designed to prevent water, raw stones, etc. from flowing back inside, and to facilitate the replacement of the rod 3.

The drive unit D drives the outer wheel body 2a,
A highly elastic wheel D such as a pneumatic tire that comes into contact with 2b
1 are provided on both sides so that the axis of rotation is the axis of symmetry, and guide wheels D3 are provided that abut on the side surfaces of the outer ring bodies 2a and 2b, and the shell C is arranged so that its center of rotation is horizontal. It is designed so that it can be supported and rotated smoothly.

The sorting device E is connected to the discharge port 131 of the shell C, and has a mesh-like truncated cone-shaped main body with open ends at both ends, which separates powder and granules obtained by crushing raw stones according to their particle sizes. E1, a discharge port E2 provided directly below the main body E1 to discharge small particles, and a discharge port E2 provided directly below the main body E1 to discharge large particles.
It consists of a discharge port E3 provided in front of the particle size 1, and it is possible to separate discharge according to the particle size.

Next, the operation of the present invention configured as above will be explained.

First, the raw stones stored in the hopper A are sent to the stone supply device B via the chute A1, and then,
Supplied from the stone supply device B to the shell C together with water,
The rough stone will be crushed.

That is, the raw stone supplied into the shell body 1 from the stone supply device B through the supply port 111 is rotated by the drive unit D.
Although the shell body 1 has a tapered shape, the outer ring bodies 2a and 2b that come into contact with the drive portion D have the same rotation axis and the same diameter as the shell body 1, so the outer ring bodies 2a and 2b have the same diameter. 2b can each rotate at the same rotation speed, and liner 1 of rod 3 described later
Since the thrust caused by the collision with the guide wheels D3 can be prevented by the guide wheel D3, stable constant speed rotation is possible.

As the shell body 1 rotates in this way, the rods 3 collide repeatedly, and the raw stone is crushed. This crushing action is caused by the cylindrical body 1 of the shell body 1.
2 has a larger diameter on the supply port 111 side than on the discharge port 131 side, and since the rotation axis is horizontal, the raw stones are not immediately discharged from the discharge port 131 by the water flow supplied with the rough stones. long shell body 1
It can be retained in the interior and receive sufficient crushing action.

In addition, the water flow becomes slow, but since the rotation axis of the shell body 1 is horizontal and the diameter of the discharge port 131 is larger than the diameter of the supply port 111, backflow is difficult to occur, and therefore, the water flow is slow. The backflow prevention structure of device B can be simplified.

The crushed powder and granules are sent from the discharge port 131 to the sorting device E, where they are separated by the mesh-like body of the main body E1 according to their particle size, and the small-diameter powder and granules are sent to the separator E through the discharge port E2. From there, large-diameter powder and granules are discharged from outlet E.
It is designed to be discharged from 3 onwards.

During the crushing process, the rod 3 strongly collides with the liner at its end, especially at the supply port side, since the shell body has a truncated cone shape with a larger diameter on the supply port side than on the discharge port side.

Comparing the degree of damage to the liners 14a, 14b, and 14c due to collision, the damage to the liner 14a is the most severe, the damage to the liner 14c is the second, and the liner 14b is hardly damaged. Therefore, if the liner is divided into three parts in this way, only the damaged part of the liner needs to be replaced, so that the effort and cost of replacement can be reduced.

As described in detail above, the present invention has the shell main body formed into a truncated conical shape with a diameter larger on the supply port side than on the discharge port side, and on the inner peripheral surface, suitably divided liners are disposed, and at least one pair of liners is disposed on the inner peripheral surface. An outer ring body is installed around the outer periphery, and this is supported by the drive part so that the rotation axis of the shell body is horizontal, and the diameter of the discharge port is set larger than the diameter of the supply port toward the center of rotation of the side plate. Therefore, water flows into the area formed between the truncated cone-shaped generatrix portion and the lower end portions of the supply and discharge ports.
The rough stone becomes stable and easy to stay, so the residence time of the rough stone can be extended, and the rod acts parallel to the generatrix of the truncated cone, allowing for efficient crushing. It improves efficiency and crushing capacity, making it more compact.Furthermore, since the axis of rotation can be made horizontal, thrust is less likely to occur, and even if thrust occurs, it can be canceled out by the guide wheels, ensuring the stability of the shell body at all times. In addition, since the rotating shaft is horizontal and the inner diameter of the outlet located at the center of rotation is larger than the inner diameter of the supply port, backflow of water can be prevented, and the backflow prevention structure of the stone feeding device is also improved. It is simple and has a large discharge port, making it easy to replace rods and liners.

Furthermore, when replacing the liner, the liner is divided and attached as appropriate so that only the severely damaged portion can be replaced, which is very effective in reducing the labor and cost of replacement.

In addition, in the above embodiment, only the case where the liner is divided into three parts was explained, but the present invention does not necessarily have to divide the liner into three parts, and the specific structure of the shell main body, drive part, etc. may be changed as appropriate. They may also be arbitrarily determined within the range in which the above-mentioned objectives, functions, and effects described below are achieved.

As is clear from the above description, according to the present invention, the above-mentioned problems that have arisen with conventional rod mills can be improved very simply and effectively. I have to say that the actual profits are quite large.

[Brief explanation of the drawing]

The drawings show one embodiment of the rod mill of the present invention, and Fig. 1 is a partially cutaway side view, and Fig. 2 is a partially cutaway side view.
The figure is a longitudinal sectional view of the shell body. 1... Ciel body, 3... Rod, 11, 13
... Side plate, 12 ... Cylindrical body, 14a, 14b, 14
c... liner, 111... supply port, 131... discharge port, A... hopper, B... stone feeding device, C... shell, D... drive section, E... sorting device.

Claims (1)

[Scope of utility model registration request] The supply port side has a truncated cone shape with a larger diameter than the discharge port side between both side plates, and a liner that is divided into at least the supply port side and the discharge port side is arranged on the inner peripheral surface, and at least a liner is provided on the outer peripheral wall. A pair of outer ring bodies are provided around the circumference and supported rotatably with the center of rotation horizontally by a drive unit consisting of highly elastic wheels. A shell main body having an outlet diameter larger than that of a supply port, a hopper and a stone supply device arranged on the supply port side of the shell main body so as to be able to supply arbitrary raw stones to the shell main body, and a sorting device disposed on the discharge port side of the shell main body so that the crushed material obtained by crushing any rough ore with a desired number of rods housed in the shell body can be discharged from the discharge port and separated according to particle size. A rod mill featuring.