SU899125A1 - Centrifugal classifier - Google Patents

Description

one

The invention relates to devices for separating solid particles according to the density of their material under the action of centrifugal inertia forces, and can be used in petroleum. metallurgical, construction and other branches of the household.

A centrifugal separator for finishing geometric samples is known, which includes a conical bowl mounted on a frame with annular rims rotated from an electric motor, with annular rims having a variable pitch and a variable depth tlb.

The disadvantage of this device is low productivity and periodic (discontinuous) nature.

The closest to the proposed technical essence and the achieved effect is a centrifugal classifier, including a housing with a coaxially mounted nozzle for feeding the sorted material, nozzles for unloading separation products, partitions with discharge plows, a cyclone element with a drive, a rotating table with a drive 2.

The purpose of the invention is to improve the quality of separation in the dry classification of mineral particles by density.

This goal is achieved by the fact that the area of the table is provided with concentric partitions forming concentric gutters.

FIG. 1 shows a device

10 general view; in fig. 2 - table with partitions, plan; in fig. 3 - hinge, plan.

Based on the 1. Centrifugal classifier mounted body

15 2, the cyclone element 3 and the partition walls 4, the drive 5 of the cyclone element rotating the stepped table 6 and its drive 7. The cyclone element 3 is connected to the housing 2 by

20 a hinge consisting of a fixed sleeve 8, a movable ring 9 and supports 10. The lower end of the cyclone element 3 receives the rotation from the actuator 5 by means of the hinge 11 and the driving link 12 and is balanced by the balance bar 13.

Table 6 is mounted on support rollers 14 and driven by gear 15 from actuator 7. The axis of the cyclone element 3 is installed under

angle to the axis of rotation of the driving link 12.

Centrifugal classifier works as follows,.

When the leading link 12 rotates, the support 11 carries away the lower end of the cyclone element 3, which describes the circle. Since the upper end of the cyclone element 3 is connected to the housing 2 by means of a hinge and is unable to rotate about its own axis, all particles introduced into the rotor through the funnel 16 will experience centrifugal forces that are in any position of the cyclone element 3 directed from the axis , the rotation of the driving link 12. As the cyclone element 3 does not rotate about its axis and is set at an angle d. to the axis of rotation of the drive, the particles under the action of centrifugal forces will move along a helix in the direction of the lower end of the rotor 3,

At the exit of the cyclone element 3, each particle will have centrifugal force, the magnitude of which will be determined by the formula

,, PV 1

(1) C - LU g

g.

where C is the magnitude of centrifugal force;

V is the volume of particles;

g is the acceleration of the force of gravity;

O) - angular velocity;

g is the radius of rotation of the particles;

I - the density of the material particles. The greater the density of the particles, the farther from the cyclone it will fly away and vice versa, i.e. the removal of particles from the point of departure from the cyclone will be proportional to the density of their material, and their area of distribution will be

have a circle shape. By dividing the area of 1 circle with circular partitions, we are able to group particles, the difference in density limits of which will have a certain value, f specified by the technical requirements for sorting .. The number of partitions is also determined by the technical requirements for sorting each specific material.

When the table b is rotated in the direction indicated by the arrow, particles of the material concentrated in the annular spaces of the table b are removed by the plows 17 through the chutes 18 from the classifier.

5 The application of the proposed device will improve the quality of classification in the processing of mineral raw materials by the dry method.

Claims (1)

1. USSR author's certificate 308587, class, 03 B 5/32, 1966, 0 2, USSR Author's Certificate for Application No. 2660844, cl. B 03 B 5/32, 1978 (prototype).