SU1238808A1 - Trommel screen - Google Patents

Description

The invention relates to devices for the separation of materials, in particular to the drums of a drum type.

The purpose of the invention is to increase productivity.

In figure 1, the rumble; Fig.2 is a section A-A in Fig.1; on fig.Z - section bb in figure 1.

The drum screen contains a deaf disintegrating stand 1, a double screen 2, a loading device 3 and receivers 4 and 5 of separation products of fine fractions and coarse material. The walls of the inner drum b are made of perforated metal sheets. The shedding surface of the outer drum 7 in the form of a polyhedron is made of fixed and movable longitudinal rods 8 and 9. The fixed rods 8 form the edges of the polyhedron, and the movable rods 9 are located in the same plane between them, while the size of the slots between the rods increases. . The ends of the movable rods 9 are supported on the inner side of the screen on elastic pads 10 of elastic material located in the sockets of the drum support rings. On the outer side of the screen 2, in its upper part, spring-loaded elements in the form of rollers 11 are installed on the frame for radial movement of the movable rods 9. At least two circular cutters 12 are mounted along the screen, which are rigidly fixed on the fixed rods on the outside of the screen .

The roar works as follows.

Ore with water is loaded into the rotating screen through the charging device 3. In stage 1 desin takes place.

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tegration of material. Then the material enters the double drum screen 2 for separation. The material passing through the perforations of the inner drum 6 enters the sowing surface 7 of the outer drum. When the drum rotates in its upper position under the action of the rollers 1, each movable rod 9 moves inside the screen and enlarges the gap between the rods. The filled material under its own weight falls out of the slots and their cleansing occurs. Upon further rotation of the drum, the rod 9 returns to its original position under the action of the damping pads 10. The material that has passed through the slots is divided into certain fractions by means of circular cut-offs 12 and sent to the receivers 4 products of the separation of fine fractions, then to enrichment. Krz pny material that has not passed the gap, at the end of the rumble is unloaded into the receivers 5.

The advantage of the proposed device is an increase in the efficiency of the screening of small fractions of ore due to the periodic complete cleaning of the 0 screen cracks, which in productivity increases productivity.

A more complete isolation of fine material, especially mineral grains of a flattened shape, creates favorable opportunities for the subsequent efficient extraction of small fractions of the mineral during enrichment, which is of particular importance for gold-bearing placers. Additional extraction of gold, depending on the type of deposit and the characteristics of the metal, can reach several percent.

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Editor M.Blanar

Compiled by N.Tuleninov.

Tehred O.Gortvay Proofreader I.Erdeyi

Order 3325/4 Circulation 565 Subscription

VNShPI USSR State Committee for Inventions and Discoveries 4/5, Moscow, Zh-35, Raushsk nab. 113035

Production and printing company, Uzhgorod, st. Design, .4

Claims (2)

1. A DRUM SCREEN, comprising a drum mounted on the frame with the possibility of rotation, made of longitudinally arranged rods installed in the seats of the drum support rings, characterized in that, in order to increase the performance of the screen, the latter is equipped with spring-loaded elements mounted on the frame located above a drum with the ability to interact with the end parts of the rods, while the ends of the rods located through one are mounted on elastic gaskets. 2. The screen according to claim 1, characterized in that the spring-loaded elements are made in the form of rollers. 1 12ί