Gravity concentrator

FIELD: mining engineering; mechanics.

SUBSTANCE: gravity concentrator includes a conical chamber with downward facing cone vertex, a central pulp charging tube, which can rotate in said chamber, a nozzle to supply water into lower part of said chamber, and containers to collect light and heavy fractions of material. Concentrator is equipped with a perforated conveyor worm, which is rigidly connected with said central tube and provides for bottom-up pulp transfer within chamber. Nozzle is positioned coaxially with said central tube to create loosening fluid flow, which passes through splitter and filter in the direction opposite to that of the pulp delivered from said tube.

EFFECT: improved efficiency of valuable heavy fraction extraction, improved concentrator throughput.

2 dwg

 

The invention relates to the field of enrichment of gold and rare metal materials and can also be used to extract valuable minerals of high density.

A device for separating particles in an upward flow of water containing chamber of conical shape, facing the top of the cone down the block for submission to the chamber of the source material, the sources of hydrodynamic and vibrating its opening, a container for collecting concentrate [1].

The disadvantage of this device is the low efficiency of the separation of fine particles by their density due to the large difference in flow velocities at the height of the camera and attenuation of vibrations from the sources.

Known as the hub of gravitational containing a perforated chamber of conical shape located to the top of the cone down, Central purposesmusic pipe placed in the chamber for rotation, a dispersant material, made in the form of needles attached to the pipe fitting for water supply in the lower part of the chamber and containers for collecting the light and heavy fraction of the material [2]. This device is taken as a prototype.

The disadvantage of this device is that in the chamber formed by the turbulent flow regime pulp under the influence of lateral hydrodynamic pressure generated by the water flow of caratteristica in the chamber, and the pressure created by the flow loosening water from the top to the top of the cone in the region of accumulation of heavy fractions. In addition, in this device there is no possibility of continuous discharge light large fraction during its operation.

The objective of the invention is the provision of efficient extraction of valuable components from the source material through the use of the segregation process-diffusion separation of heavy and light fractions of the material in the fluidized bed.

This is achieved by the fact that the hub of gravitational containing chamber of conical shape located to the top of the cone down, Central purposesmusic pipe placed in the camera with the possibility of rotation, fitting for water supply in the lower part of the chamber and containers for collecting the light and heavy fractions of material is further provided with a perforated auger in the form of a helix, is rigidly connected with the Central pipe and ensure that the movement of the pulp from the bottom up inside the chamber, and the nozzle is coaxial with the Central pipe, creating a thread loosening fluid in counterflow to the movement of the pulp from the pipe.

Figure 1 shows a General view of the hub gravity, figure 2 is a section along a - a camera.

The hub gravitational consists of a chamber 1 conical form located by the top of the cone down, the hopper 2, the available source material and water, creating a slurry with a given ratio of T:W, a funnel 3, the Central boot pipe 4, is placed in the chamber for rotation at which the pulp is fed into the chamber 1, a perforated screw 5 in the form of a helix, rigidly connected with the pipe and ensure that the movement of the pulp from the bottom up inside the chamber 1, two containers 6, 7 for collecting the light and heavy fractions and feeder loosening water in counterflow to the movement of the pulp from the pipe, including the fitting 8, the divider 9 with the filter 10. The Central tube 4 is attached to the chassis 11 by means of the spokes 12 and the bearing 13, and its rotation is provided by, for example, of the engine 14, gear 15, a belt 16 and a tapered pair 17. The output of the light fraction from the camera 1 is carried out in the container 6 through the annular groove 18, and the heavy fraction in the container 7 through the outlet 19 and the valve 20.

The hub gravity works as follows.

Source material, for example, in the form of placer product and water is fed into the hopper 2 with a given ratio of T:W depending on the particle size distribution of the starting material. Resulting from this, the pulp is fed from the hopper 2 into the chamber 1 through the hopper 3 and the Central tube 4. The outlet pipe is located at a fixed distance from the vertex of the cone, sufficient for accumulation layer concentrate. D. the I filling of the chamber 1 of the original material to the specified level is responsible for the rotation of the screw 5 with a specified frequency. Then in the counter-current movement of the pulp from the pipe 4 serves loosening the water from the nozzle 8 through the divider 9 and a filter 10 into the chamber 1 in an amount to provide a transition from the compressed fluid state of the material. This results in the diffusion of the heavy fraction of the material from top to bottom and its deposition in the accumulation zone of the concentrate and light fraction is moving upward and accumulate in the upper part of the chamber 1. During this rotational movement of the screw prevents the formation of channels in which there is a transition of a material from a fluid in a sealed state. The presence of holes in the auger allows you to diffuse the heavy particles throughout the volume of the chamber 1 in the lower part of the accumulation zone of the concentrate. In operation, the hub light fraction is withdrawn from the chamber 1 through the annular groove 18 in the container 6, and the heavy fraction in the container 7 through the outlet 19 and the valve 20.

Thus, the above-described hub gravity allows to carry out continuous discharge of the light fraction and discharging heavy fraction, as well as to create a laminar flow of the slurry and to increase the permeability of the material for deposition of fine and colloidal heavy particles throughout the volume of the chamber, which allows to increase the productivity hub to 1.5% and to increase efficiency the efficiency of recovery of valuable heavy fraction from the source material to 95%.

Sources of information

1. U.S. patent No. 3997436, CL VV 5/60 from 10.06.1976,

2. RF patent №2246996, CL VV 5/62 from 25.12.2002, (prototype)

The hub gravitational containing chamber of conical shape located to the top of the cone down, Central purposesmusic pipe placed in the chamber rotatably fitting for water supply in the lower part of the chamber and containers for collecting the light and heavy fractions of the material, characterized in that it is equipped with a perforated auger in the form of a helix, is rigidly connected with the Central pipe and ensure that the movement of the pulp from the bottom up inside the chamber, and the nozzle is coaxial with the Central pipe, creating a thread loosening fluid in counterflow to the movement of the pulp from the pipe.



 

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