RU2533408C1 - Gravity mineral dressing device - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: gravity mineral dressing device comprises a loading hopper conjugate to the distribution chamber, from both sides of the chamber the slope upward and downward dividing transporting channels are mounted, which contain with a possibility of change of the spatial position the lapping plates with cross partitions, and also slope unloading channel with the device for transportation of dispersed mineral matter implemented as an elevator. The bottom part of the unloading channel is hydraulically connected with the bottom of the downward transportation channel. The device is fitted with a tank with the bleeding line, inside which an opened vessel for running water connected to the unloading channel with elevator is located. The unloading channel is fitted with a water level regulator, which is implemented as a vessel, where with a possibility of movement in a vertical direction the tubular control vertical branch pipe connected with a free-flow bleeding line is installed. In the water level regulator a sensor connected to a transporter drive, feeding mineral material into the loading hopper is installed. The upper end of the tubular control vertical branch pipe is implemented bevelled or fitted with a drainage cut. The upper edge of the open vessel is located below the upper edge of the tank.

EFFECT: improvement of quality of dressing process, minimising losses of minerals.

4 cl, 1 dwg

Description

The invention relates to the beneficiation of minerals, and in particular to the separation of dispersed materials by a density exceeding the density of the separation medium, and can be used in processing plants and plants for the beneficiation of mainly coal and shale, as well as other minerals.

A device for gravitational mineral processing, including an inclined channel of rectangular cross section, a loading pipe for supplying a shared material, a receiving sump for loading a heavy fraction and a device for supplying a separation medium. To control the hydrodynamic parameters at different loads, two movable deck plates with transverse zigzag partitions partially overlapping the channel cross section from above are installed as source material in the device (A1, SU, No. 569322, 1977).

The disadvantage of this device is the constant density of separation along the length of the working zone, which prevents the improvement of the quality of the products obtained, and the zigzag arrangement of partitions on the deck plates leads to mixing of the separation products and the loss of the useful component.

Closest to the claimed invention is a device for mineral processing, including a loading hopper, paired with a distribution chamber, on both sides of which are installed inclined ascending and descending dividing transport channels, in which overlapping partitions are located with the possibility of changing their spatial position, as well as an inclined unloading channel with a device for transporting dispersed mineral material, the lower part of the discharge channel of the hydra Influenced to the bottom of the downstream delivery channel. To transfer mineral material into the feed hopper and inclined discharge channel, water is supplied (RU, C1, No. 2038854, 1995).

The disadvantages of the known solutions are large losses of minerals in the steeply inclined separator at the beginning of the process and when the power is stopped, as well as the low efficiency of separating waste rock from minerals in the enrichment process.

The invention is directed to reducing mineral losses and improving the quality of the enrichment process.

The specified technical result is achieved in that in the device for gravitational mineral processing, including a loading funnel, paired with a distribution chamber, inclined ascending and descending dividing transport channels are installed on both sides of the chamber, in which overlapping plates with transverse partitions, as well as an inclined discharge channel with a device for transporting dispersed mineral mat rial in the form of an elevator, the lower part of the discharge channel is hydraulically connected to the lower part of the downward conveying channel, it is equipped with a tank with a discharge pipe, inside the tank there is an open container for running water connected to the discharge channel with the elevator, while the discharge channel is equipped with a water level regulator, which is made in the form of a vessel in which, with the possibility of movement in the vertical direction, a tubular adjusting vertical pipe connected to nym discharge line.

A sensor is installed in the water level controller, which is connected with the drive of the conveyor supplying mineral material to the feed funnel.

The upper end of the tubular adjusting vertical pipe is beveled or provided with a drainage slot.

The upper edge of the open container is located below the upper edge of the tank.

Since the claimed invention differs from the closest analogue by a number of essential features, it meets the condition of patentability “novelty”.

Operations, actions on material objects during the implementation of the claimed method do not contradict the natural laws, which testifies to its compliance with the patentability condition “industrial applicability”.

Since the prior art does not know the implementation of the device for gravitational enrichment with an element of the original design that regulates the water level, the claimed invention meets the condition of patentability "inventive step". Water level control reduces the loss of minerals and prevents the mixing of previously separated rock with minerals during the enrichment process.

The drawing shows a schematic diagram of the proposed device.

The device contains a loading funnel 1 connected by means of a flange connection to an inclined separator containing a distribution chamber 2, on both sides of which there are installed inclined ascending 3 and descending 4 separation transporting channels of rectangular cross section. The funnel 1 is equipped with a pipeline for supplying water to it and can be made tubular.

The ascending channel 3 of the separator is intended for the transport of a lighter product, such as coal, and the descending 4 for heavy, for example enclosing rocks.

In the case of using the claimed device for the enrichment of a mineral with a higher specific gravity, the separated rock is fed through an upward channel 3, and the mineral is fed through a descending channel 4.

Along the longitudinal axis of the channels 3 and 4 by means of adjusting screws 5, the overlapping plates 6 are mounted with the possibility of changing their spatial position. Transverse partitions 7 are made on the plates 6. By changing the angle of inclination of the plates 6 relative to the longitudinal axis of channels 3 and 4, their flow area is changed depending on the complex of specific technological parameters (particle size distribution of the dispersed mineral material, water flow rate, etc.).

The lower part of the downward conveying channel 4 is hydraulically connected to the lower part of the discharge inclined tubular channel 8 with a bucket elevator (not shown) located inside it for transporting dispersed rock separated from the mineral.

Above the installation, there is a tank 9, inside of which an open tank 10 with running water is installed, the upper edge of which is lower than the edges of the tank 9. Excess water from the tank 9, overflowing from the tank 10, is discharged through a pressure-free pipeline.

From an open container 10, through a pipe 11, water is supplied to an unloading inclined channel 8.

The discharge inclined channel 8 is equipped with a water flow controller, which is made in the form of a vessel 12 with a tubular vertical pipe 13 installed inside it with the possibility of movement in the vertical direction. The pipe 13 is connected with a pressureless discharge pipe 14. The adjustment pipe 13 is moved by means of a rod and a screw 15 connected to it, interacting with a fixed nut.

The upper end of the vertical adjustment pipe 13 can be made beveled relative to the longitudinal axis or with a drainage slot (not shown), tapering in the direction from the end to the middle part. The chamfered end of the pipe 13 allows you to simplify its articulation with the thrust from the screw 15 and to ensure the removal of water with suspended mineral particles through the pipe 14.

In the vessel 12 of the water flow regulator, a water level sensor 16 is installed, which, when its allowable flow rate is increased and the level in the channel 3 is increased, shuts off the conveyor feeder 17, which feeds the dispersed mineral material into the feed funnel 1.

The pipeline 11 is equipped with a valve 18, blocking it when you turn off the conveyor 17, which feeds the source material.

A strain gauge scales (not shown) are installed on the conveyor 17, the signal from which controls the electric valve 18.

The device operates as follows.

In the feed funnel 1 from the conveyor 17 serves to be enriched source dispersed material, as well as water, from where the flooded material is sent to the distribution chamber 2.

In the distribution chamber 2, coal is separated from the rock having a higher specific gravity. Coal with an upward flow of water is transported through channel 3, and the rock is transferred through channel 4 to the discharge channel 8, where it is moved by a bucket elevator to the place of its processing, temporary or permanent storage.

The transverse partitions 7 of the plates 6 contribute to the creation of turbulence zones of the corresponding flow transferring the rock and coal, which causes additional separation of coal from the rock during transportation.

Depending on the amount of dispersed material transported, its particle size distribution, etc., through the plates 6 in the channels 3 and 4, the optimum flow area is established.

The change in the amount of water supplied can be controlled by changing the height position of the upper open end of the vertical pipe 13.

In the event of difficulties in the movement of the rock in channel 4, the water velocity also decreases in it, as a result of which the water level in the dewatering discharge channel 8 with the elevator increases. In the absence of a flow regulator, this would lead to clogging of coal with rock in the channel 3. Thanks to the regulator 12, the optimum water level is set, and when it is exceeded, excess water flow is discarded and a constant level is maintained.

In the case of a decrease in the concentration of the material in the separator as a result of stopping the feed of the starting material and stopping the conveyor 17, the passage section of the downward channel 4 increases, which causes a drop in the water velocity in channels 3 and 4 and leads to the mixing of lighter coal into the rock, i.e. to mineral losses and to a decrease in the water level in the controller 12. When the feed is turned off, the strain gauge of the conveyor 17 sends a signal to open the valve 18, as a result of which additional water is supplied to the separator in an amount determined by a special algorithm established during commissioning. Additional water levels the water level in the elevator to a predetermined level and prevents the loss of lighter minerals with a heavy product through channel 4.

When clogging the separator, the water level rises both in the discharge channel 8 and in the vessel 12 of the level controller. When the water level increases to a critical level, the emergency level sensor 16 is activated, which turns off the conveyor 17 for supplying the source material.

In the case of supplying an excessive amount of mineral material to the receiving funnel 1, the conveyor 17 stops at the signal of the sensor 16, and the necessary flow rate of the supplied water is regulated by means of the gate valve 18.

The proposed device allows you to automatically increase the efficiency of separation of coal from rock.

Claims (4)

1. A device for gravitational mineral processing, including a loading funnel interfaced with a distribution chamber, inclined ascending and descending dividing transport channels are installed on both sides of the chamber, in which overlapping plates with transverse partitions are placed with the possibility of changing their spatial position, as well as an inclined discharge channel with a device for transporting dispersed mineral material in the form of an elevator, the lower part of the discharge channel the channel is hydraulically connected to the lower part of the downward conveying channel, characterized in that it is equipped with a tank with a discharge pipe, an open tank for running water is located inside the tank, connected with a discharge channel with an elevator, while the discharge channel is equipped with a water level regulator, which is made in the form a vessel in which with the possibility of movement in the vertical direction there is a tubular adjusting vertical pipe connected to a pressureless discharge pipe. 2. The device according to claim 1, characterized in that a sensor is installed in the water level controller associated with a conveyor drive supplying mineral material to the feed funnel. 3. The device according to claim 1, characterized in that the upper end of the tubular adjusting vertical pipe is beveled or provided with a drainage slot. 4. The device according to claim 1, characterized in that the upper edge of the open container is located below the upper edge of the tank.

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