SU1118409A1 - Method of classification of finely ground products - Google Patents

Abstract

METHOD OF CLASSIFICATION OF A TINNY-FINE PRODUCT, including the delivery of the product as a suspension under constant pressure to the separation zone, excitation of vibrations, separation of suspensions in the central field into fractions In order to increase the speed of the classification process due to the excitation of low-frequency oscillations in the entire volume of the suspension, oscillations in the separation zone are excited at the natural frequency of the oscillatory system. ... (L § tX) 4: o and

Description

The invention is intended for the fine classification of crushed materials in a central field with control of the size of the discharge and can be used in the enrichment of minerals, chemical and other industrial sectors.

A known method for classifying suspensions is by applying acoustic oscillations to the flow of the suspension passing under pressure through a reticular septum, which is a filament element lj,

The disadvantage of this method is the small specific capacity of the device implementing the method, due to the accumulation of sediment on the surface of the filter element.

The known method of separating suspension consists in supplying cycneH-jium under constant pressure to the separation chamber and creating a variable pressure of the same frequency and different polarity in the separation chambers and filtrate z.

This method has a low productivity due to incomplete riser (Sheni layer of particles on the surface of the filter element. The closest to the invention to the technical essence and the achieved result is the method of classifying the fine product, including feeding the product as a suspension under constant pressure into the zone separation, excitation of vibrations, separation of suspensions in the centrifugal field into fractions, particle size control of the fine fraction;

i The disadvantage of this method is the implementation of oscillations at a frequency that does not coincide with the resonant frequency of the oscillatory system, which reduces the separation boundary size, the speed of the classification process and the specific productivity of the thin product, g volume of suspension.

This goal is achieved by the fact that according to the method for classifying a finely divided product, which involves feeding the product as a suspension under constant pressure into

separation zone, excitation (e oscillations, separation of suspensions into fractions, granulometric control of the fine fraction, oscillations in the separation zone are excited at the natural frequency of the oscillatory system.

The drawing shows the device, realizing the proposed method. The device consists of a housing 1

a cylindrical shape, separated by a mesh partition 2 on the chamber of the initial suspension 3 and the filtrate chamber 4. A nozzle 5 is embedded in the wall of the chamber 3 of the initial suspension tangentially to its surface to feed the initial suspension. In the lower part of the chamber 3 there is a rigid piston 6 having the shape of a truncated cone, at the top of which is a discharge device 7. In the chamber of the filtrate 4 there is a discharge pipe 8 and a rigid piston. 9, connected to the piston-6 tons d-10. Pistons 6 and 9 are attached to the housing 1

flexible elements 11 and connected

with the exciter 12. Case 1

fixed to the upper frame 13 of the table 14.

The method of classification of suspensions is carried out in the following way.

In the chamber of the initial suspension 3, a suspension is supplied under pressure, which is fed to the mesh partition 2 and is discharged through the discharge port B. At the same time, the mesh

partition 2 does not fit all parts of 1. This is due to the fact that when a suspension is supplied through a pipe 5, located tangentially to the surface of the housing 1, the suspension in the chamber 3 of the initial suspension is under the action of centrifugal forces. Due to this, large particles are thrown to the surface of the housing 1 and are deposited down the walls of the piston 6.

and a large product is discharged from the housing 1 by means of an unloading device 7.

Suspensions in housing 1 are reciprocated.

This is accomplished by oscillating pistons 6 and 9, which are rigidly interconnected by means of traces 10 and mounted on flexible elements 11. At a constant flow of suspension through

The mesh partition 2 imposes pulsations of the suspension and through it the potential of overflows. When the piston 9 moves down to the mesh partition 2,

3 11184094

and piston 6 - from it in chamber 4, the expected economic effect

pressure is present, and in cell 3 it is understood that the invention is used for classifying, and the mesh intersection of iron ores at the southern Mining and Processing Plant

2 flows arise with the opposite estimate of 504.7 thousand rubles. in year,

direction.5 In the process of testing the effectiveness

 .Classification by grain 0.044 mm; so-called alternating fluctuations of suspen-tavil 85%, the concentration of large

sia create a variable pressure of the product equal to 1200 g / l, the eigenfrequency of the eigen frequency oscillations on the condensed large system, the weight of the suspicion is gibooduku 3.8-5, b1, on the sink 7.5 bone. N

ry

Claims (1)

METHOD FOR CLASSIFICATION OF FINE PRODUCTS, including feeding the product in the form of a suspension under constant pressure into the separation zone, exciting vibrations, separating the suspensions in the central field into fractions, granulometric control of the fine fraction, characterized in that, in order to increase the speed of the classification process due to the excitation of low-frequency oscillations in the entire volume of the suspension, the vibrations in the separation zone excite at the natural frequency of the oscillatory system. . ..