RU171098U1 - DEVICE FOR MINERAL SEPARATION - Google Patents

Abstract

The utility model is designed to enrich and sort minerals and can be used in the extraction of diamonds from ore concentrate. A device for the separation of minerals consists of a hopper, feeder, cutter, concentrate and tail product receivers, as well as laser ores and a spectrometric unit focused on one zone of the ore flow. A feature of the spectrometric unit is two narrow-band light filters installed in series so that the light is divided into two streams, of which the first contains a part of the spectrum with the Raman line of the useful component, and the second contains narrow spectral bands with a wavelength longer and shorter than the Raman line. The light flux intensities are measured by photodetectors, the signals from which are further compared by the electronic control unit, depending on the magnitude and ratio of the received signals giving the cutter a command to isolate part of the ore concentrate with a useful component. The presented device allows to increase the selectivity of the extraction of diamond from the concentrate pre-enrichment, has high reliability and performance.

Description

The utility model is designed to enrich and sort minerals and can be used in the extraction of diamonds from ore concentrate.

A known method and device for the separation of diamond (patent No. US4693377 A, 09/15/1987), including a dispenser, conveyor belt, laser, photodiode detector, control computer, actuator, receivers of concentrate and tail products. The detector measures the signal intensity in the spectral range of the Raman scattering (Raman) line of diamond, depending on the value of which the useful component is separated.

The disadvantages of the device are low productivity, a high level of scattered laser radiation at the detector, which reduces the selectivity of separation.

A known method and device for the separation of diamond (patent No. EP 0772037 A2, 05/07/1997), including a feeder, including a node for measuring grain size, a dispenser, a conveyor belt, an infrared laser, a focusing system, a detection system with a photodiode detector and a light filter, which controls computer, actuator, concentrate and tail product receivers.

The disadvantages of the device are the inability to correctly account for the background spectrum of a luminescent nature and low selectivity.

A known method and device for the separation of diamond (patent No. US 5143224 A, 09/01/1992), comprising a feeder, water conduit, an inclined table for feeding pulp, an infrared laser, a focusing system with photodiode detectors and light filters, including fiber-optic elements, a detection system, including with fiber-optic elements, including with a narrow-band light filter, actuator, concentrate and tail product receivers.

The disadvantages of the device are the inability to correctly take into account the background spectrum of a luminescent nature and low selectivity.

A known method and device for separation (patent No. RU 2292964, 02/10/2007), adopted as a prototype, consisting of a hopper, feeder, optical radiation source, entrance slit, collecting lenses, dispersing element, measuring channel with output slit of a certain width, outer surface which reflects, the reference channel receiving the light flux reflected from the outer surface of the output slit of the measuring channel, the output slit of the reference channel, photodetectors, electronic unit, actuator, receivers ntratnogo and tail products gap reference and measurement channels are arranged coaxially and are adjustable.

The disadvantages of the device are low vibration resistance and a high level of scattered light circuits with a dispersing element, leading to a decrease in selectivity and reliability of the device.

The technical result consists in increasing the vibration resistance, reliability and selectivity of the device.

The technical result is achieved by the fact that the device is additionally equipped with a condenser mounted coaxially with the photodetector of the measuring channel, as well as a reference filter located after the condenser and coaxially with it, and a measuring filter installed between the reference filter and the photodetector of the measuring channel at the working angle of the measuring filter relative to the axis of the condenser, while the reference photodetector is located at an angle of specular reflection of the measuring filter to the axis of the cond nsora.

A device for the separation of minerals is illustrated by the following figure: FIG. 1 is a general diagram of a device, where:

1 - hopper;

2 - feeder;

3 - laser;

4 - spectrometric unit;

5 - condenser;

6 - reference light filter;

7 - measuring filter;

8 - measuring photodetector;

9 - reference photodetector;

10 - electronic unit;

11 - actuator;

12 - receiver of the concentrate product;

13 - receiver tail product;

A device for the separation of minerals consists of a hopper 1 (Fig. 1) and a feeder 2 rigidly connected to it, focused on one area of the laser 3 and a spectrometric unit 4, including a fixed input condenser 5, a reference light filter 6 located after the condenser and coaxial with it, located after the reference light filter at a working angle to the axis of the condenser, the measuring filter 7, a measuring photodetector 8 coaxial to the condenser, a reference photodetector 9 located relative to the axis of the condenser at an angle from reflection of the measuring filter 7 relative to the axis of the condenser, from the electronic unit 10, which receives the electric signal of the photodetectors 8 and 9, in which these signals are compared and the command is formed to the actuator 11 to cut off the useful component located below the feeder of the actuator 11, concentrate receivers 12 and tail 13 products located under the actuator.

The device operates as follows. From the hopper 1 by the feeder 2, the grains of minerals enter the separation zone, where they are irradiated by laser radiation 3 with a wave number of maximum ν ₀ . After scattering on the grain, the radiation enters the spectrometer unit 4. The condenser 5 of the spectrometer unit 4 forms a parallel stream from the diverging scattered light flux. After the condenser, a part of the light flux in the range ν _KP ± δ ₁ , where ν _KP is the wave number of the RS Raman line, δ is half the bandwidth of the filter, passes the reference filter 6 and falls on the measuring filter 7. The measuring filter 7 passes part of the light in the range ν _KP ± δ _2, the intensity of which is measured by a photodetector measuring channel 8. The remaining light flux reflected from the measurement filter 7, and is incident on the photodetector 9. In the reference channel, depending on the wave length and width using a line th laser half the reference filter bandwidth may be 20 <δ ₁ <200 ^cm-1, measuring the color filter 5 <δ ₂ <50 ^cm-1. The angle of the measuring filter relative to the light flux and the axis of the condenser and the corresponding location of the reference photodetector of the reference channel are determined by the working angle of the measuring filter. The light fluxes of the reference and measuring channels are measured by photodetectors of the reference channel 8 and the measuring channel 9, are converted into electrical signals. These signals are fed to an electronic system 10 that generates a command to the actuator 11 depending on the magnitude and ratio of the signals received therein. The actuator, which can be a mechanical or pneumatic shutoff, divides the minerals into concentrate 12 and tail 13 products. The measuring filter 7 may be a narrow-band pass filter, and may be a narrow-band reflection filter, in the latter case, the photodetector 9 measures the intensity of the reference channel, and the photodetector 8 measures the intensity of the measuring channel.

The presented device allows to increase the selectivity of diamond extraction from the concentrate pre-enrichment, has increased vibration resistance and reliability.

Claims (1)

A device for the separation of minerals, consisting of a hopper, feeder, optical radiation source, photodetectors of the measuring and reference channels, an electronic unit, an actuator, receivers of concentrate and tail products, characterized in that the device is additionally equipped with a condenser mounted coaxially with the photodetector of the measuring channel, and a reference light filter located after the condenser and coaxially to it, and a measuring light filter installed between the reference light filter and the photodetector nick measuring channel under measuring filter operating angle relative to the axis of the condenser, and the photodetector of the reference signal is at an angle of specular reflection to the measuring filter condenser axis.

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