RU2238150C2 - Method of jigging and jigging machine for realization of this method - Google Patents

Abstract

FIELD: classification and concentration of minerals.

SUBSTANCE: proposed method includes forming of horizontal flow of pulp or water. Starting material is introduced inflow at the top. Hydraulic mixture is subjected to classification and preliminary concentration on riffled surface of inclined plate stack. As a results, particles are differentiated in pulp flow by trajectory of fall depending on density and size. Further concentration is performed on bed of jigging machine in chambers at separate discharge of tailings and differential selection of parameters of jigging cycle in each chamber. Jigging machine includes body, jigging screens, flexible diaphragm connecting the chamber and discharge cone, drive for transmission of oscillations and under-screen water supply branch pipe. Body consists of one or several chambers which are divided in lower part by means of partition. Each chamber is provided with sectors for removal of tailings; these sectors are located at end of each chamber and are provided with valves. Mounted in upper part of each chamber is stack of inclined riffled plates made in form parallelepiped with water or pulp and starting material supply branch pipes. Plates are located at equal distance relative to one another. Plate stack is oriented relative to pulp flow at angle. Body is provided with slime discharge sector mounted after chambers of jigging machine.

EFFECT: complete extraction of heavy minerals; increased productivity.

3 cl, 1 dwg

Description

The invention relates to the field of classification and mineral processing.

A known method in which a pre-classified material is subjected to a process of jigging separation by density, for example, in the chamber of a jigging machine diaphragm type MOD-3. For effective separation of the mineral mixture, depending on the size class of the starting material, deposition cycles are selected in frequency and amplitude [1].

The disadvantage of this method of jigging is the impossibility of jigging without preliminary preparation of the material, for which the source material is pre-classified in special devices (screens).

Although the jigging device is a MOD-3 diaphragm jigging machine, which has an autonomous diaphragm drive for one of the three (the last along the source material moving) cameras, can partially differentiate the material and, therefore, can be recommended for jigging under conditions of technological “zooming” of the original material, often MOD-3 is used in case of ineffective preliminary classification of the material being deposited.

The closest in technical essence to the claimed installation is a jigging machine with a thin-layer loading module and the implemented method of jigging in it. In order to increase the likelihood of fine particles of precious metals passing through the bed in this machine, a jigging method is implemented, which means that during the separation of the material, the speed of the downward movement of the diaphragm increases stepwise at the last stage of the cycle [2].

Traditionally, for an effective enrichment with a deposit for each class of fineness of the material to be separated, the corresponding frequency and amplitude of the deposit cycle are selected. Implemented in this method, a stepwise increase in the speed of the downward stroke of the cycle partially increases the oscillation frequency of jigging. In this case, the amplitude of the deposition cycle remains unchanged. Such a technique for enrichment of unclassified material is only a partial solution to increase the depositing efficiency. In addition, the practical implementation of this complex type of cycle is mechanically difficult.

The essence of the invention lies in the fact that the method of depositing previously unclassified material with the deposition of a heavy fraction through an oversize bed is characterized in that a horizontally directed flow of pulp or water is formed, where the feed material is introduced from above into the stream, then the hydraulic mixture is subjected to classification and preliminary enrichment on the corrugated surface of the bag inclined plates.

The jigging machine for implementing the proposed method, comprising a housing that consists of one or more series-connected chambers, jigging gratings, a flexible diaphragm connecting the chamber and the cone for unloading separation products, a drive for transmitting vibrations, a pipe for supplying under-water water, characterized in that the chambers are separated by a partition in the lower part, at the end of each chamber there are sectors for tailing with valves, a package of inclined corrugated plates in the form of a parallel epipeda, spaced apart at equal distance, wherein the entire package is oriented relative to the flow of pulp angled nozzles for feeding of pulp to feed the starting material, the body of the jig is provided with a camera sector for the removal and disposal of sludge.

Comparative analysis with an analogue shows that in the proposed embodiment, the separation process is fundamentally changed, in the presence of an additional classification and enrichment system, the differentiation of the initial mineral mixture in the pulp stream is carried out according to the principle of equidistance and the subsequent deposition is carried out differentially in each chamber, thereby significantly expanding the possibilities of enrichment of the initial material in a wide range of size class and density fluctuation, increases the separation efficiency. Therefore, the present invention meets the criterion of "novelty."

Unlike the prototype, a loading module, consisting of a package of inclined plates, is used for preliminary classification, removal of sludge and input of raw material (particle orientation) into the depositing process.

In contrast to the design of the jigging machine adopted as a prototype, a package of inclinedly mounted plates occupies the entire working volume of the machine above the chambers. Moreover, the horizontal direction of the pulp flow along the plates installed along its path allows you to create a separation fan of heavy and light minerals on the inclined surface of the plate. The fan-shaped separation of minerals on the surface of the plates is enhanced by cycles of oscillation of the diaphragm, a pulsating supply of additional water to the plates, the organization of the movement of the separated particles on their surface due to the installation of corrugations (as on the surface of the concentration table), eliminates the intersection of the trajectories of light and heavy minerals.

Thus, the process of deposition of particles on an inclined plane with a lateral horizontal flow of pulp is a direct component in the separation of material by density and carries one of the main functions of the proposed depositing process and the machine for its implementation.

The quality of enrichment is greatly improved by trapping thin classes of useful components. Particularly effective is the capture of thin classes of gold flake and plate-shaped.

Thus, a comparative analysis allows us to conclude that the criterion of "inventive level".

The invention is illustrated in the drawing.

The jigging machine for the implementation of the proposed jigging method consists of a housing 1 with nozzles for supplying pulp (water) 2 of the initial power 3, for the removal of sludge 4, a package of inclined corrugated plates in the form of a parallelepiped 5 is installed in the upper part of the housing, in the lower part of the housing there are sequentially installed jigging chambers 6 with discharge cone-shaped nozzles for discharging the chamber product 7, connected to the housing by a flexible diaphragm 8, a sector for discharging tails 9 with a valve 10, each chamber is equipped with an autonomous Odom to communicate vibrations.

Installation works as follows.

The source material through the pipe for supplying the source material 3 falls into the region between the inclined corrugated plates 5 and slides down on their surface. Under the influence of the flow of water pumped through the nozzles 2, the particles acquire an inclined path and are distributed among the equidistant fractions. The heaviest of them fall into the bed of the jigging machine of the first chamber and then undergo the usual jigging process, lighter ones fall into the bed of the next chamber, etc. Sludge is removed by discharge pipe 4.

Thus, the depositing method and the machine for its implementation due to the distinguishing features provides a more complete extraction of heavy minerals and high productivity. The most effective use of this facility in the enrichment of placer gold, since its particles, due to their flatness, descend along an inclined surface much faster than with free immersion.

List of references

1. Handbook of ore dressing. The main processes. M .: Nedra, 1983, p. 53-54.

2. The theoretical justification for the development of new methods and apparatus for the extraction of fine noble metals from ores and industrial raw materials. Morozov Yu.P. Abstract of dissertation for the degree of Doctor of Technical Sciences. Ekaterinburg 2001.

Claims (2)

1. The method of depositing a previously unclassified material with the deposition of a heavy fraction through an oversize bed, characterized in that a horizontally directed flow of pulp or water is formed, where the source material is introduced from above into the stream, then the hydraulic mixture is subjected to classification and preliminary enrichment on the corrugated surface of the package of inclined plates, this is the differentiation of particles along the trajectory of incidence in the pulp stream, depending on the density and size and further enrichment is carried out in bed from adochnoy machines installed in series with separate chambers terminal tails and depositing a graded selection of cycle parameters in each compartment. 2. Jigging machine for implementing the proposed method, comprising a housing that consists of one or more series-connected chambers, jigging gratings, a flexible diaphragm connecting a chamber and a cone for unloading separation products, a drive for transmitting vibrations, a pipe for supplying under-water water, characterized in that the chambers are separated by a partition in the lower part, at the end of each chamber there are sectors for tailing with valves, a package of inclined corrugated plates in the form of steam is installed in the upper part of the chambers llelepiped, equally spaced from each other, and the whole package is oriented relative to the pulp stream at an angle, with nozzles for supplying water or pulp and supplying the source material, while the body behind the chambers of the jigging machine is equipped with a sector for removal and removal of sludge.