RU2641147C1 - Device for gravity concentration of mineral resources - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: device for gravity concentration of mineral resources includes a hopper coupled to a distribution chamber, on both sides of which inclined ascending and descending separating transport channels are installed, in which overlapping plates are arranged with possibility of changing its spatial position, and an inclined discharge channel with a device for transportation of dispersed mineral material. The device is provided with pressure vessel for separating medium, connected by a pipe to the lower channel of the device through the inclined channel for unloading heavy product of coarse fraction, connecting device with dewatering elevator, and adjusting density of material separation by its specific weight by setting water level in pressure tank by means of movable gate device and maintaining the specified density of separation by lifting or lowering the gate device determining the level of water in the pressure tank. A pressure sensor is mounted on the upper part of lower channel and connected with the drive of the gate device, which keeps constant pressure automatic mode and specified density of separation in the lower channel of device. The descending transport channel is connected to the inclined discharge channel. A calibrating hole is installed in the lower part of the descending transport channel.

EFFECT: enhanced efficiency of material separation by density.

4 cl, 2 dwg

Description

The invention relates to the beneficiation of minerals, namely 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 and the quality of the starting material, two movable deck plates with transverse zigzag partitions partially overlapping the channel section from above are installed in the device (SU, A1, No. 569322, 1977).

The disadvantage of this device is the inability to obtain stable quality indicators of the separation of material by density with significant fluctuations in the productivity and fractional composition (density) of the feedstock, and the zigzag arrangement of partitions on wafers - decks reduces the effect of weighing the material when water passes through the partition, thereby reducing the efficiency of material separation by density.

Close to the claimed invention is a device for mineral processing, including a loading hopper, paired with a distribution chamber, on both sides of which there are inclined ascending and descending dividing transport channels, in which overlapping partitions are located, as well as an inclined unloading channel, with the possibility of changing their spatial position with a device for transporting dispersed mineral material, the lower part of the discharge channel is hydraulically connected 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 disadvantage of this device is the inability to obtain stable quality indicators of the separation of material by density with significant fluctuations in productivity and fractional composition (density) of the feedstock.

Closest to the claimed invention is a device for gravitational enrichment of minerals, including a loading hopper, paired with a distribution chamber, on both sides of which there are inclined ascending and descending dividing transport channels, in which overlapping plates 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, the lower part of the discharge the channel is hydraulically connected to the lower part of the downward delivery channel, characterized in that it is equipped with a tank, an open tank with running water is located inside the tank, the upper edge of the open tank is located below the upper edge of the tank, the tank is connected by a pipeline to the loading tank, and the open tank in the tank with an unloading channel, while the latter is equipped with a regulator of water flow in the upward transporting channel, which is made in the form of a vessel communicating with the unloading channel, in which, with the possibility of moving in the vertical direction, is installed a tubular vertical adjusting pipe connected to a pressureless discharge pipe (patent for invention No. 2533408 of July 18, 2013).

The disadvantage of this device is the inability to obtain stable quality indicators of the separation of material by density with significant (more than 30%) performance fluctuations, as well as when starting and stopping power supply to the device.

The invention is aimed at increasing the efficiency of separation of material by density.

The specified technical result is achieved by the fact that in the device for gravitational mineral processing, including a loading funnel, paired with a distribution chamber, on both sides of which there are inclined ascending and descending dividing transport channels, in which overlapping plates are placed with the possibility of changing their spatial position, and also an inclined discharge channel with a device for transporting dispersed mineral material, the device is equipped with a separate container for the separation medium, connected by a pipe to the lower channel of the device through an inclined channel for unloading a heavy product of a large fraction connecting the device with a dewatering elevator, and regulating the density of separation of the material according to its specific gravity by setting the water level in the pressure tank by means of a movable gate device and maintaining the most predetermined separation density by raising or lowering the slide gate device that determines the water level in the pressure tank.

On the upper part of the lower channel there is a pressure sensor connected to the drive of the gate device, which automatically maintains a constant pressure and thereby a predetermined separation density in the lower channel of the device.

A downward transport channel is connected to an inclined discharge channel. A calibration hole is installed at the bottom of the downward transport channel.

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

When implementing the claimed invention, objective laws of nature are not violated, which allows us to assert that it meets the condition of "industrial applicability".

Due to the fact that, from known sources of information, a method for controlling the density of separation of a material by its specific gravity by establishing the water level in a pressure vessel is not known, the claimed invention meets the condition of "inventive step".

In FIG. 1 shows a schematic diagram of the proposed device with an inclined discharge channel; in FIG. 2 - the same with the calibration hole.

The device comprises a loading hopper 1 connected to the distribution chamber 2 by means of a flange connection. The hopper 1 can be made tubular. On both sides of the chamber 2, inclined ascending 3 and descending 4 dividing transporting rectangular channels are installed.

The ascending (upper) channel 3 is intended for the transport of a light product, coal, and the descending (lower) 4 - for a heavy product.

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

On the top cover of the downward channel 4 of the device is a pressure sensor 8.

Inside the device there are two barrier plates 9, preventing the passage of water between the upper cover of the device and the plates 6.

The lower part 10 of the downward transport channel 4 can be hydraulically connected to the lower part of the inclined tubular channel 11 with a bucket elevator (not shown) located inside it for transporting dispersed rock or with a calibrated hole 12 for the release of fine product.

At the overflow level of the light product, a pressure vessel 13 is installed, hydraulically connected by a pipe 14 to the device and the transporting device 10, as communicating vessels.

The pressure tank 13 consists of three chambers: a water intake chamber 14, a chamber with an adjustable overflow level 15, separated from each other by a partition 16, and also a discharge chamber 17 into the discharge flow from the chamber 15.

The level of overflow of water in the chamber 15 determines the pressure of the water (i.e. pressure) in the lower part of the downward channel 4 and, thereby, the separation density by specific gravity in the device. The pressure in the lower part of the downward channel 4 is controlled by a pressure sensor 8 and depends on many factors: productivity, sieve and fractional composition of the feed, the height of the plates 7.

The level of water overflow in the chamber 15 is set by a movable partition (gate) 18, which moves up and down by rotation of the screw 19 passing through the sleeve 20 located on the movable partition 18. The screw 19 is rotated by the actuator 21, which is controlled automatically by the sensor pressure 8 located on the upper cover of the lower channel 4 of the device. When the pressure in the lower channel 4 of the device increases above a predetermined limit, the actuator 21 lowers the movable partition 18 and the pressure decreases to a predetermined level. When the pressure decreases, the actuator 21, at the command of the level sensor, raises the movable partition 18, increasing the pressure and pressure in the lower channel 4 of the device to a predetermined level. This allows you to automatically maintain the separation density in the device at a given level and increase the efficiency of separation of material by density in the device for gravitational enrichment.

The supply of shared material in the receiving funnel of the hopper 1 is carried out by means of a conveyor 22.

The implementation of the device with an inclined tubular discharge channel is designed to issue a large fraction of the separated product.

Claims (4)

1. Device for gravitational enrichment of minerals, including a loading funnel, paired with a distribution chamber, on both sides of which there are inclined ascending and descending separation transporting channels, in which overlapping plates are placed with the possibility of changing their spatial position, as well as an inclined unloading channel with a device transportation of dispersed mineral material, characterized in that it is equipped with a pressure tank for the separation medium s, connected by a pipe to the lower channel of the device through an inclined channel for unloading a heavy product of large fractions, connecting the device to a dewatering elevator, and regulating the density of separation of the material according to its specific gravity by setting the water level in the pressure tank by means of a movable gate device and thereby maintaining a given separation density by raising or lowering the slide gate device that determines the water level in the pressure tank. 2. The device according to p. 1, characterized in that on the upper part of the lower channel there is a pressure sensor connected to the drive of the gate device, which automatically maintains constant pressure and thereby a predetermined separation density in the lower channel of the device. 3. The device according to claim 1, characterized in that the downward transport channel is connected with an inclined discharge channel. 4. The device according to claim 1, characterized in that a calibration hole is installed in the lower part of the descending transport channel.

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