SU1755926A1 - Mineral concentration technique - Google Patents

Abstract

Application: mineral processing. SUMMARY OF THE INVENTION: The material is fed into the field of centrifugal forces through the feed pipe 1. The separation of material according to density is carried out with a separation factor of 35 to 80. The material is evenly distributed along the inclined working surface 2 and forms a flowing stream when it leaves. Heavy particles fall into the annular groove 3 closest to the surface 2, and the lungs enter the far groove 5. 1 Il. x | SL SL Yu o

Description

The invention relates to the field of mineral processing, in particular, to methods for the enrichment of coal.

The gravitational method of mineral processing is known, in which minerals are separated by the dynamic action of a jet of water in an oblique flow of shallow depth not exceeding ten times the maximum grain size of the enriched mixture.

The movement of the pulp occurs on an inclined surface under the action of gravity at a speed of up to 1-2 m / s and the material is transported by the hydrodynamic driving force.

A known method of enrichment of minerals includes feeding a suspended flow into the center of the surface of a rotating table, separating the material according to density as it moves along an inclined surface, and withdrawing separation products.

The disadvantage of mineral processing is the inefficient separation of minerals. This is due to the fact that the material on the working surface moves in a dense layer and its separation occurs with the combined effect of centrifugal force and gravity, the resultant of which varies in size from the center to the periphery of the table, but remains constant in direction, resulting in separation efficiency is reduced.

A known method of enrichment of minerals, including the supply of material in the field of centrifugal forces, the separation of material according to density and the output of enrichment products in-ring receivers.

The disadvantage of the known method of mineral processing is the low separation efficiency of the material and insufficient specific productivity. When material is moved on a separator rotor with guiding elements, constrained conditions are created and, as a result, the enrichment efficiency is reduced. Insufficient specific productivity is a consequence of the fact that enrichment takes place directly on the separation rotor, in the space bounded by the guiding elements and the diameter of the rotor.

The aim of the invention is to increase the separation efficiency and specific productivity.

The goal is achieved by the fact that in the method involving the supply of material in the field of action of centrifugal forces, section 0

five

0

five

0

five

0

five

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The material’s density and output of enrichment products, the material’s separation by density is produced from the flowing stream with a separation factor of 35 to 80.

The essence of the method of mineral processing is as follows.

The separation of minerals is carried out by uniformly distributing the material over the rotating inclined working surface during acceleration of the centrifugal field, surpassing the acceleration of gravity and ensuring the creation of a flowing stream, from which fractions of a corresponding density are then extracted by gravity.

At the same time, the distance of the particle (S) and the maximum altitude (H) are calculated by the formulas:

0 Vis sin 2 a

where V0 is the initial material velocity at the descent from the truncated cone, m s .;

a - the angle of the cone to the horizon, hail;

q - acceleration of the force of gravity, ms

The movement of the material over the working surface with the separation factor from 35 to 80 ensures its even distribution on the thin layer, and by creating a gushing stream when the material discharges from the working surface, a fan of particle trajectories of various density is formed under the force of gravity, resulting in increased efficiency separation and specific performance.

The invention is illustrated in the drawing, which shows a device that implements a method of mineral processing. It includes the feed pipe, work surface 2, annular gutters of the rock product 3, intermediate 4 and concentrate 5.

The source material is fed through a feed pipe 1 in the field of centrifugal forces onto an inclined working surface 2 rotating at a separation factor of 35 to 80. The material is evenly distributed on the latter and as it goes around it forms a flowing stream around the perimeter. Under the force of gravity, rock particles with a density (1800–2600 kg / m, then particles of intermediate density (1400–1800 kg / m3), and then light concentrated particles with a density less than (1400 kg / m), fall into the annular gutters corresponding products 3, 4, 5.

Thus, using the method of mineral processing provides the following advantages in comparison with the known method:

increasing the efficiency of mineral processing by creating a fan of particle trajectories of various densities above the annular receivers of the separation products;

increase in specific productivity as a result of separation of fractions of different density in the radial directions along the entire perimeter of the working surface with

a meter larger than the last one.

Fo rmu l and z a b r ete n A method of mineral processing, including the supply of material to the field of centrifugal forces, the separation of material according to density, and the output of enrichment products, characterized in that, in order to increase the separation efficiency and specific productivity, the separation of material according to density is produced from the flowing stream with a separation factor of 35 to 80.

Claims (1)

Claim The method of mineral processing. including the supply of material in the field of action of centrifugal forces, the separation of the material by density and the output of enrichment products, characterized in that, in order to increase the efficiency of separation Compiled by L. Korsak Editor T. Ivanova Tehred M: Morgental Proofreader S. Baker Order 3041 Circulation Subscription VNIIIPI State Committee for Inventions and Discoveries under the State Committee for Science and Technology of the USSR 113035, Moscow, Zh-35. Raushskaya nab., 4/5 Production and Publishing Combine Patent, Uzhgorod, 101 Gagarin St.