JPS5926148A - Central mineral charge system vertical type centrifugal crusher - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention This invention is a center-feeding type vertical type in which the material to be crushed is fed to a rotor that rotates at high speed and is sent tangentially by centrifugal force, colliding with a collision surface provided around the rotor and crushing the material. Regarding centrifugal crushers.

In this type of centrifugal crusher, when objects to be crushed that fly out from the rotor collide with the collision surface, some are crushed and others bounce back without being crushed. Some particles collide with the rotor or the inner wall of the casing and are crushed, but others do not break and lose their kinetic energy and fall almost in their original form, resulting in variations in particle size and loss of product value. Ta.

In this invention, by forming the collision surface on a slope, the crushed objects that collide and bounce are reflected diagonally upward, and the kinetic energy is used to return them to the rotor, and this process is repeated until the crushed objects are crushed. It is an object of the present invention to provide a center-fed vertical centrifugal crusher that can increase grain size and produce products with good particle size.

To explain this with reference to Drawing 1, the casing 1 has a truncated conical shape at the top, a crushing chamber 2 is formed at the bottom, and the cross section is approximately arrow-shaped or original. A belt 3 is hung between a motor (not shown), and the rotor 4 is driven to rotate at high speed by the motor, and a chute 5 for feeding material to be crushed to the rotor is connected to the crushing chamber 2. On the same level (the latter chute 5 is supported and distributed by guide vanes 6 provided at appropriate intervals on the ceiling of the casing, and the crushed material dropped from the toe of the casing passes through the chute 5 to the rotor 41). The ore is fed, flies in a tangential direction from the lower part of the outer surface of the rotor due to centrifugal force, and collides with a dead bed 8 formed from crushed pieces accumulated in the crushing chamber 2. After the collision, the ore is crushed. The fragmented object that is not crushed by the collision and bounces back flies upwards and is reflected by the casing without much loss of its kinetic energy. The object hits the object and falls into the chute, where it is collected.

Then, it jumps out of the rotor again and collides with the collision surface.

This means that the material to be crushed is recycled until it is crushed.

Some of the fragments that are crushed and scattered during the collision fly upwards, but as the particle size becomes smaller, they lose kinetic energy due to air resistance and fall down before they reach the top.

In the embodiment described above, the impact surface is formed as a dead bed of debris, or in another embodiment as a repulsion plate.

Further, although the chute 5 is supported on the casing ceiling by guide vanes 6, other supporting means having an opening to the chute may be used instead of the guide vane, and instead of being supported on the casing ceiling, the casing slope It may also be supported on a wall. Further, it is desirable to provide a reflective plate on the sloping wall surface of the casing and on the ceiling, where objects to be crushed hit and reflect, on the inner wall of the casing in order to prevent the casing from being abraded due to collisions and to reduce noise.

As described above, in the crusher of the present invention, objects to be crushed that bounce back without being crushed are reflected and returned to the rotor, and are crushed by colliding with the collision surface.According to this device, , the crushing ratio is increased and products with good particle size can be obtained.

[Brief explanation of drawings]

The figure shows a 4[lt] center-feed vertical centrifugal crusher according to the present invention.
This is a schematic diagram. 1...Casing 2...Crushing chamber 4...Rotor 5...
Shoot 8...Dead Bed Patent Attorney Akira Sato −

Claims (1)

[Claims] A rotor 4 that rotates at high speed is placed inside the casing 1, and a chute 5 for feeding materials to be crushed is placed in the center of the rotor. The crushed objects are formed upward and bounce back without being crushed after colliding with the collision surface, flying upwards, hitting a reflecting plate installed on the top of the casing or in the core, and being reflected before returning to the chute. Center-fed vertical centrifugal crusher