RU2447945C1 - Air-operated separator deck - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to mining, particularly, to assembly units of equipment for separation of solids in concentration of minerals. Proposed deck comprises plate with compressed air feed bores and guide grooves. Deck is equipped with rods arranged on said plate in the zone of said grooves perpendicular to plate working surface. Distance between rods is selected to make, at least, the size of larger lump of rock being separated. Rods are arranged in, at least, one line. Every line is directed along deck reciprocation. Said rods are arranged along straight line, or at peaks of zigzag line.

EFFECT: higher accuracy of sizing loose material to density.

5 cl, 1 dwg

Description

The invention relates to the mining industry, and in particular to parts of equipment intended for the separation of solid materials in order to enrich minerals.

The description of equipment intended for mineral processing on concentration tables or pneumatic separators is known, one of the main parts of which is the deck. So, it is known that on the surface of the deck of a concentration table having a trapezoidal or rhombic shape, narrow slats (corrugations) are fastened, which facilitate, for example, reciprocating movements and concussions of the table of segregation of pulp grains and their separation by density. When using concentration tables, water is involved. Also, for dry coal and ore dressing, pneumatic tables (separators) with riffles are used, while compressed air is supplied to the tables (A.A. Abramov. “Processing, processing and integrated use of solid minerals.” M.: MGTU Publishing House, 2001 ., p. 225-234).

A description of the concentration table for gravitational separation in the pulp stream of fine-grained and sludge ores having a diamond-shaped deck with riffles parallel to its drain lateral edges and at an acute angle to the longitudinal axis of the deck is also known (RU 2100085, class B03B 5/04, published 27.12 .1997).

The known solution is characterized by cumbersome and unreasonably large dimensions.

Closest to the proposed one is a deck of a pneumatic separator having loading and unloading edges and guide corrugations made arcuately curved in the direction from the loading to the unloading edge. The deck is made in the form of a trapezoidal plate with loading and unloading edges. The plate has openings for supplying compressed air. The narrowed end of the deck is designed to collect the heaviest fractions of the rock mass, including stones, and trays are made on the lateral edge of the deck to collect less dense fractions of the rock mass, including the industrial product. Compressed air enters through the openings on the deck surface (RU 91895, published 03/10/2010).

On a well-known deck, pneumatic material separation is not strictly based on particle density. In the collection zone of less dense fractions of the deck, particles of smaller size, including higher density, predominate, due to the dependence of the lifting force of air on the size of the particles. The influence of particle size leads to the fact that part of the large particles of coal goes into the rock, and part of the fine rock into coal.

The technical result is to increase the accuracy of separation of bulk material by density by reducing the influence of particle size on the separation process.

The technical result is achieved in that the deck of the pneumatic separator containing a plate with holes for supplying compressed air and guiding flutes is characterized in that it is provided with rods (pins) mounted on the plate perpendicular to its working surface, while the distances between the rods are selected not less than the size of the a large piece of shared breed.

In the particular case, the rods are installed in at least one row, with each row located in the direction of reciprocating motion of the deck and in the transverse direction with respect to the direction of movement of the shared rock.

The rods can be arranged in a row along a straight line or at the tops of a zigzag line.

The deck preferably has two or more rows of rods spaced apart.

The invention is illustrated in the drawing, figure 1 schematically shows a deck of a pneumatic table (view in isometric view), intended for dry enrichment of rock mass.

As can be seen from the drawing, the deck consists of a plate 1 having a trapezoidal shape. The deck has a loading zone 2, the tapered end of the 3 deck is designed to collect the heaviest fractions of the rock mass, including stones, and trays are installed on the side of the 4 deck to collect less dense fractions of the rock mass, including the industrial product. Through holes in plate 1 (not shown), compressed air enters the surface of the deck. On the working surface of the deck, riffles 5 are formed having an arcuate or rectilinear shape. The arcuate flutes 5 are curved in the direction from the deck loading zone 2 towards the periphery to its lateral edge 5.

At least one row of rods 6 is installed on the deck board 1 perpendicular to its working surface, located in the zone of the grooves 5 in the direction of the reciprocating movements of the deck and, therefore, in the transverse direction with respect to the direction of movement of the material to be separated.

The rods 6 can be arranged in a row along a straight line or at the vertices of the zigzag line, as shown in the drawing. The deck preferably has two or more rows of rods 6 spaced apart from each other. The rods 6 can also be arranged not in rows, but in a different order or randomly.

In any case, the distance between the rods should be at least the size of the largest piece supplied to the separation of rock, otherwise large pieces will get stuck. In practice, the distance between the rods is not more than two sizes of the largest piece.

In the process of material separation, the deck makes reciprocating movements in a direction parallel to the trapezium bases, and vice versa, and at the same time has a slope in the direction transverse to the direction of reciprocating movement. The air flow supplied from below through holes in the plate 1 under the layer of material loosens it, creating conditions for the separation of particles by density. As a result of delamination, the light fraction occupies the upper part of the layer and, thanks to the vibrations of the deck, moves to the receiving trays on the side of the 4 deck. The heavy fraction is located in the lower part of the layer and under the action of reciprocating movements of the deck is transported along its riffles 5 and unloaded from the narrowed end 3 of the deck. Flutes 5 prevent the drift of particles of the heavy fraction in the direction of vibration of the deck.

The presence of vertically mounted rods 6, forming a kind of lattice, reduces the influence of particle sizes on the quality of separation into fractions by density, i.e. reduces the number of large pieces penetrating into the collection zone of the light fraction due to less resistance to air flow, since the lattice has a greater resistance to the passage of large particles than small ones. Thus, the accuracy of the separation of material particles by density is increased.

Claims (5)

1. The deck of the pneumatic separator containing a plate with holes for supplying compressed air and guide flutes, characterized in that it is equipped with rods mounted on the plate perpendicular to its working surface, while the distances between the rods are chosen not less than the size of the largest piece of shared rock. 2. The deck according to claim 1, characterized in that the rods are installed in at least one row, with each row located in the direction of the reciprocating movements of the deck. 3. The deck according to claim 1, characterized in that the rods are arranged in a row along a straight line. 4. The deck according to claim 1, characterized in that the rods are arranged in a row at the vertices of the zigzag line. 5. The deck according to claim 1, characterized in that it has two or more rows of rods located at a distance from each other.