Luminescent separator of minerals and a method of control over its operation

FIELD: minerals dressing.

SUBSTANCE: the offered inventions concern to dressing of minerals, in particular, to dressing of a ground mineral material. The technical result of the inventions is improved selectivity of separation of a source material by a choice of efficient way of separation and elimination of an effect of noises of a channel of registration and instability of the excitation system operation; improved automatic adjustment of the registration and excitation systems, reduction of an amount of used hardware and the time necessary for performance of the prestarting inspection and also provision of the automatic prestarting and periodic inspection and an increase of its reliability. For this purpose the separator contains means of delivery and transportation of the source material in a zone of inspection; a source of an exciting radiation; a photo-receiving device, and means of treatment of a signal of the luminescence including an analog-digital converter (ADC), a unit of the random-access memory (RAM), a register of a separation threshold and a microprocessor. In addition the separator is supplied with a register of delay and a synchronizer, the first output of which is connected to the input of the analog-digital converter start; the second output is connected to the input of the RAM; and its third output - with the input of the record of the microprocessor. The reading inputs of the random-access memory, the register of a threshold and the register of delay are connected accordingly to the first, second and third outputs of the microprocessor. The method of control over operation of the separator is based on a periodic use of its indicators in absence of a separated material for registration of intensity of their luminescence. In the capacity of an indicator they choose the air filling the volume of the separator, in the capacity of the way of separation - the normalized autocorrelation function (NACF) of a luminescence signal. At that they normalize the value of the NACF signal of the luminescence by its division by the result of integration of a square of a registered signal of a luminescence. Determine a threshold of separation equal to a threshold set at operation in a mode of separation. The value of the parameter of separation they choose so, that the value of NACF at the chosen value of the parameter exceeded the threshold.

EFFECT: the invention ensures improved selectivity of the source minerals separation, elimination of operational noises of the registration and other systems, automatic adjustment of the systems, reduction of hardware amount and time for preparation, increased reliability.

8 cl, 3 dwg

 

The present invention relates to the field of mineral processing, namely upgraders crushed mineral material using emerging under the influence of the excitation radiation, the luminescence enriching minerals for their detection. The invention can be implemented as in the separators at all stages of enrichment and control devices products, for example, diamond-containing raw materials.

When fluorescent separation uses the properties of minerals to emit radiation in the optical region of the spectrum under the influence of the excitation radiation. Thus both the magnitude and kinetics of the luminescence depends on the type of mineral.

To improve the selectivity of the extraction enriched mineral in the known methods fluorescent separation as a criterion for dividing use different ratios of kinetic characteristics of the luminescence signal, recorded during exposure to excitation radiation, and after it.

For example, in x-ray separator minerals means the filing of the original material in the detection zone, the excitation radiation source for irradiation of the source material, photodetector (PSD) for the registration of the luminescence signal of the mineral as lying in the effects of radiation on the source material, and after its exit from the zone of radiation, a detector for determining the presence luminescense mineral in the radiation zone, the processing device registered luminescence signal and actuating mechanism for the allocation of enriched mineral from the source material, the source of excitation radiation is made on the basis of x-ray tube and is designed to operate in continuous mode. The detection zone is formed in such a way that allows FPU register luminescence of minerals in the entire area. The processing device includes amplifiers, switches, capacitors, diodes, one-shot, OR and And, - unit threshold, comparator, adder and a delay element control signal actuating mechanism. It provides a record of the maximum signal intensity of the luminescence of the mineral as during exposure to radiation on the source material, and after its exit from the irradiation zone, obtaining the difference of the registered signals, comparing the obtained value with a given threshold and to produce a control signal actuating mechanism according to the comparison results. As a criterion for dividing use the difference of the maximum signal intensity of the luminescence of the mineral during exposure to excitation radiation and after its termination [A.S. CCC is 1556769, In 07 With 3/346, 03 At 13/06, 1990].

In this separator the signal processing luminescence is produced in analog form, this takes into account the kinetic characteristics of the recorded signals luminescence. However, in such a separator is very difficult to obtain the necessary accuracy of measurement of the intensities of luminescence due to the large dynamic range of signal amplitudes. Significant error in the measurement results also contribute noise tract reception and instability of the excitation system. Consequently, useful product will not only enrich the mineral, and related minerals, the initial value of the signal afterglow luminescence which is close to enriched or (in the case of separation of minerals in the stream) whose total detected intensity is comparable or larger than the enriched mineral.

The closest analogue we offer fluorescent separator minerals is a separator containing money supply and transport raw material in the detection zone, the source of excitation radiation, means for detecting signals luminescence of minerals, made in the form of at least one photodetection unit (FPU), processing tools luminescence signal, including analog-to-digital Converter (ADC), high performance embedded is ocessor, block random access memory (RAM), FIFO and register threshold separation, connected by a data bus, and an actuator [the testimony of the Russian Federation for useful model 12534, In 07 With 5/342, 2000]. Excitation radiation source is made on the basis of x-ray tube with a pulse power source, which is synchronized with the ADC and RAM through the block timers. The microprocessor is programmed to perform the following functions: sets the threshold separation, setting time, which is the ADC conversion register FPU luminescence signal processing digital signal values according to the criterion of separation, comparison of the obtained values of the criterion of separation with a given threshold and output a control signal actuating mechanism. As a criterion for dividing the selected value only long-term components of the luminescence signal registered in the appropriate time, or values of a given ratio, for example the difference of the values of its short and long-term component.

The conversion of the analog signal at the output of the PR in the digital form allows not only to reduce the processing time of the recorded luminescence signal and developing a control signal, but also to increase the selectivity of detection enriched mineral selecting as the e criterion for dividing ratio between the values of its short and long-term component. However, in this separator does not resolve the main disadvantage is the lack of accuracy of the measurement of the luminescence signal due to the influence on the measurement results of noise tract reception and instability of the excitation system, which affects the selectivity of the separation of minerals.

A known method of controlling the operation of the separator minerals, including the introduction of a reference sample enriched mineral or indicator in the detection zone of the separator, its exposure to stimulating radiation, the registration of the intensity of the luminescence signal, processing the signal according to the selected criterion of separation, issuing commands to the actuator by comparing the results obtained values of the criterion of separation with a given threshold, counting the number of detections and comparing this number with the number of cycles of irradiation. Exposure indicator produces pulses of x-ray radiation, and the radiation zone is combined with the detection area [the testimony of the Russian Federation for useful model 10120, 03 At 13/06, 1999].

This method is convenient for adjustment of the separator, however, the necessity of setting the control indicator in the working volume at the time of control and then outputting it from the working volume before you start makes this method unsuitable for automatic preoperational and periodic control, which limits the possibility of the ity of its application. The lack of automatic preoperational and periodic monitoring is not possible to maintain a stable technical characteristics of the separator (extraction, selectivity).

The present invention solves the problem of improving the selectivity of separation of the source material by choosing an effective criterion for separation and improve the accuracy of measurement of the luminescence signal by eliminating the influence of noise tract of registration, measurement error and instability of the excitation system. The selected criterion of separation also enables automatic configuration of recording systems and excitation by eliminating the influence of variations in the amplitude of the luminescence signal on the measured value of the criterion for separation. In addition, the proposed method of controlling the operation of the separator reduces the amount of hardware and the time required for pre-control, and to provide automatic preoperational and periodic monitoring and to increase its reliability.

The set problem is solved by the proposed fluorescent separator minerals containing money supply and transport raw material in the detection zone, the source of excitation radiation, connected in series logger signal luminescence of the mineral, the imp is United in the view at least one photodetector device, and means for processing the signal of luminescence, including connected by a data bus analog-to-digital Converter (ADC), block random access memory (RAM), a register threshold separation and the microprocessor to carry out the functions set threshold separation, processing of the digital signal values of luminescence according to the criterion of separation, comparing the obtained values of the criterion of separation with a given threshold and generate a signal control actuator, which introduced additional register delay and synchronizer, the first output of which is connected to the input of the start of the ADC, a second output connected to the input of RAM, and the third with the input recording microprocessor inputs the read RAM, register threshold and register delays are connected respectively with the first, second and third outputs of the microprocessor, data bus, which is made in the form of bus data processing means connected to the output register delay, the microprocessor is equipped with the ability to set the parameter as the number of time delays and the possibility of processing the digital values of the luminescence signal to obtain the values of the autocorrelation function as a criterion for dividing by creating offset by a specified time delay copies of the luminescence signal is the multiplication of these signals with subsequent discrete summation of the multiplication.

Unlike most similar analogue in the proposed separator have been added to the register delay and synchronizer, the first output of which is connected to the input of the start of the ADC, a second output connected to the input of RAM, and the third with the input of the recording of the microprocessor inputs the read RAM, register threshold and register delays are connected respectively with the first, second and third outputs of the microprocessor, data bus, which is made in the form of bus data processing means connected to the output register delay, the microprocessor is equipped with the ability to set the parameter as the number of time delays and the possibility of processing the digital values of the luminescence signal to obtain the values of the autocorrelation function as a criterion for dividing by creating offset by a specified time delay copies of the luminescence signal and the multiplication of these signals with subsequent discrete summation of the multiplication.

In the proposed separator, the microprocessor may be further provided with the opportunity to implement a rationing obtained values of the autocorrelation function of the luminescence signal by dividing by the discrete summation of the square of the luminescence signal.

The source of excitation radiation may be in the form of the source is x-ray radiation, designed for continuous operation, and the detection zone is formed in such a way that allows you to record the luminescence of minerals and after its exit from the zone of radiation.

The source of excitation radiation can also be made in the form of pulsed x-ray source, the zone of irradiation and detection are the same.

In addition, the separator can be provided with the possibility of registration of luminescence of minerals from the side facing the radiation source, and/or opposite to the radiation source side.

The task is also solved and the proposed method of controlling the operation of the separator, including exposure indicator stimulating radiation in the absence of a detection zone of the separated source material, the registration signal intensity of the luminescence indicator, the processing of this signal according to the selected criterion of separation, issuing commands to the actuator by comparing the results obtained values of the criterion of separation with a given threshold, counting the number of detections and comparing this number with the number of cycles of irradiation, in which register the intensity of the luminescence signal of the air, is selected as the indicator is chosen as a criterion for dividing the normalized autocorrelation of functionala luminescence, which is obtained by integration or discrete summation works recorded signal on the same signal, but shifted in time by a given value of the parameter, the values of the autocorrelation function of the signal luminescence normalized by dividing by the result of integration of the square of the detected signal luminescence, set the threshold separation equal to the threshold, as set by mode of separation, and the value of the sort parameter is chosen so that the value of the autocorrelation function when the selected parameter value exceeded the threshold.

Unlike most similar analogue in the proposed method, register the intensity of the luminescence signal of the air, is selected as the indicator is chosen as a criterion for dividing the normalized autocorrelation function of the luminescence signal, which is obtained by integration or discrete summation works recorded signal on the same signal, but shifted in time by a given value of the parameter, the values of the autocorrelation function of the signal luminescence normalized by dividing by the result of integration of the square of the detected signal luminescence, set the threshold separation equal to the threshold specified in the work dir is IU separation, and the value of the sort parameter is chosen so that the value of the autocorrelation function when the selected parameter value exceeded the threshold.

In the proposed method, the irradiation can produce pulses of x-rays.

Radiation can also produce a continuous stream of x-rays, while the recorded luminescence signal pre is converted into a sequence of pulses using electrical modulation.

The set of distinctive features and their relationship to restrictive features in the proposed invention provides the possibility of eliminating the influence of noise tract of registration, measurement error and instability of the excitation system for the processing of the recorded signal luminescence, and, in particular, the possibility of eliminating the influence of the amplitude of the luminescence signal in the measured value of the criterion of separation, which improves the selectivity of separation and improves the quality of enriched product, and also allows automatic configuration of the registration systems and excitement.

Proposed in the invention, the set of distinctive and restrictive features are described in well-known authors of the literature.

The proposed technical solutions are izobretatel the level, because they used a new criterion of separation, which not only provides a solution to the problem of improving the selectivity of the separation of minerals, but also allows you to effectively produce enrichment of several minerals contained in the original material, due to the possibility of simultaneous installation of multiple threshold values using a single criterion for separation. The obviousness of the proposed solutions is also confirmed by the absence of such decision within at least 20 years, despite the urgency of the tasks for mining industry.

Figure 1 schematically shows an x-ray separator with a pulsed radiation source as one embodiment of the separator for the implementation of the proposed inventions.

Figure 2 shows a variant of a functional circuit of the synchronizer.

Figure 3 shows the chart:

a - pulse excitation;

b - signals registration luminescence air (1) and enriched mineral (2);

in the normalized autocorrelation functions of air (1) and enriched mineral (2).

Presented in figure 1, the separator includes a source 1 of the exciting radiation, connected in series, 2 reception signal luminescence of minerals, made in the form of at least one photopro is a lot of unit (FPU), means 3 signal processing luminescence, managing the output of which is connected with the actuating mechanism 4, and a synchronizer 5, the outputs of which are connected respectively with the first, second and third input means 3 signal processing luminescence. Means 3 signal processing luminescence contain United bus 6 data ADC 7, block 8 random access memory (RAM), a register 9 threshold separation, the register 10 delay and a microprocessor (MP) 11. The first input of the processing means 3 is input Start start ADC 7, the second input is Wr write RAM 8, and the third serves as input Wr write MP 11. Inputs Rd reading RAM 8, case 9 threshold register 10 delay are connected respectively with the first, second and third outputs of the MP 11, data bus, which is made in the form of bus 6 data processing means 3. MP-11 is equipped with the ability to set the parameter as the value of the delay time, the possibility of processing the digital values of the luminescence signal to obtain the values of the autocorrelation function as a criterion for dividing by creating offset by a specified time delay copies of the luminescence signal and the multiplication of these signals with subsequent discrete summation of the multiplication, the possibility of rationing obtained values of the autocorrelation function of the signal luminesce the tion by dividing by the discrete summation of the square of the luminescence signal, as well as the possibility of comparing the normalized values of the autocorrelation function with a given threshold or thresholds and generate a signal control actuator 4 according to the comparison results.

RAM 8 FIFO (first input first output), which provides a sampling of the stored digital values of the luminescence signal in the order received. The radiation source 1 is made on the basis of x-ray tube 18R with the high-voltage pulse power source, and FPU 2 - based PMT-85. ADC 7 may be performed, for example, on the basis chip AD7891AP-1 Analog Devices (USA) [http://www.analog.com. ADC: 8 channels, 12-bit, 500 kHz AD7891AP-1]. Registers 9 and 10 threshold and delay, respectively, can be made on the basis chip CIR, and RAM 8 - based chip CR 537 RU 8 [Heapwalker and other Design of discrete devices on integrated circuits. M.: Radio and communication. 1990].

Synchronizer 5, are presented in figure 2, comprises a generator (G) 12 periodic pulses, key (&) 13, scheme (Del1) 14 delay shaper (F1) 15 pulse counter (St) 16 modulo n+1, the trigger (Tg) 17 cycle scheme (Del2) 18 delay and shaper (F2) 19 pulse. The generator 12 can be performed on the chip CVI, key And 13 on the chip CLA (1/4), circuits 14 and 18 of the delay and the formers 15 and 19 on the waiting multivibrators KEG (1/2 every cell battery (included) is t), the counter 16 - chip CIE (the number of chips is determined by the value n), the trigger 17 - K555TM2 (1/2). A possible implementation of elements of the synchronizer 5 described [Heapwalker and other Design of discrete devices on integrated circuits. M.: Radio and communication. 1990].

The present invention can be implemented, for example, on the basis of commercially available x-ray separators for the separation of minerals in the stream of source material, designed for enrichment of diamond raw materials [Separators fluorescent LS-D-4-03M THAT 4276-041-00227703-99], by means of the separator is presented in figure 1 and 2.

The separator is presented in figure 1 and 2, works as follows. Source material containing y minerals (in figure 1 is not marked), served in the detection zone (supply and transportation of material 1 is not shown), where it is exposed to pulses (figa) x-ray radiation from the source 1. The resulting optical signal luminescence in the energy range of 300-500 nm is logged FPU 2, is converted into an electrical signal U(t) (figb), the duration of which is determined by the decay time (lifetime long-term components) luminescence, and the form - characteristics luminescense mineral (short and long components). Ha is actorname signs, in which separation is carried out - breeding, are differences in the shape and duration of the luminescence signal enrich and related minerals. The analog signal U(t) output from the FPU 2 is supplied to signal input ADC 7 and is converted into digital form. Synchronizer 5 provides a temporal sequence of operations in the signal processing by using the tools 3.

Work synchronizer 5 (figure 2) is organized as follows. The generator G 12 generates a periodic sequence of pulses with a period of t1. When a logical 1 at the output of trigger Tg 17 key 13 is open and the first output synchronizer 5 pulse appears, which is fed to the input Start start ADC 7, and the second its output produces a pulse shifted by using the scheme Del1 14 delay and shaper F1 15 at time tCRequal to or slightly greater than the conversion time of the ADC 7. This pulse is fed to the input Wr write RAM 8 FIFO. Counter to Article 16 counts the number of starts the ADC 7. After reaching a given number n starts the pulse output from Article 16 tilt trigger Tg 17, the key 13 is closed. Shaper F2 19 with a delay in the diagram Del2 18 generates a pulse at the output 3 of the synchronizer 5, which is fed to the input Wr write MP 11 and indicates the completion of data collection signal luminescence signal the end of the cycle. This same pulse returns the em trigger Tg 17 in the state "permission" account and the process repeats. The length of the delay Del2 18 is determined by the dwell time data for the subsequent calculation of the long decay time components of luminescence and exceed n·t1.

Input Wr write RAM 8 pulse synchronizer 5 consistently put received by the ADC 7 values of the luminescence signal in the RAM registers 8. As a result, in the RAM registers 8 generates a set (array) of L of n consecutive digital values of the luminescence signal, separated from each other in the time interval t1. The values of n and t1 are chosen so that the resulting array of L spanned the time interval n·t1, comparable to the transit time of luminescense mineral through the detection zone or the repetition period of the irradiating pulse source 1. After n samples of the signal values of luminescence (n runs ADC 7) synchronizer 5 with the third output signal the end of the cycle to the input Wr write MP 11. This signal MP 11 generates the third output signal Rd read register 10 delays and reads on the bus 6 data preset in the register 10 is Δt delay (record this value in the register 10 to simplify figure 1 not shown), generates the second output signal Rd read register 9 threshold (record this value in the register 9 to simplify figure 1 not shown) and reads on the bus 6 data is Aranea set in the register 9 rapids division, issues on the ground sequentially output n signal Rd read RAM 8 and reads on the bus 6 data array L of n signal values (figb) luminescence.

Next MP 11 determines the dimensionless parameter k=Δt/t1, determines the value Sk of the autocorrelation function of a signal of luminescence at a given value of k and normalizes it by the sequence of data processing operations of the array L in accordance with formulas (1), (2) and (3)

where L(i) is the signal value at the i-th transformation, i.e. in the relative point in time i·t1.

The result SN regulation values of the autocorrelation function is compared to the MP-11 with predetermined thresholds received from the register 9 to the input Rd reading. If the value of SN exceeds the lower P1, but not P2 exceeds the upper rapids, MN 11 provides a control output to the actuator 4, the signal separation enriched mineral. The process is repeated.

MP 11 performs the processing of the array L of the data collected from the previous cycle at the time when the ADC 7 and RAM 8 collect data for the current cycle. This time shift is taken into account when installing the transport delay is the time interval required to move the separator luminescense mineral from the ons detection to the separation zone. Thus, there is an operating mode of the separator.

The proposed method of controlling the operation of the separator can be demonstrated on the example of fluorescent separator minerals (figure 1) in a control mode. In this mode of operation of the separator (figure 1 and 2) source separated material in the detection zone is not available. The area of the detection zone is irradiated with excitation radiation source 1 register the intensity of the luminescence signal of the air with FPU 2 and is converted into an electrical signal uIn(t), (figb). The analog signal uIn(t) output from the FPU 2 is supplied to signal input ADC 7 and is converted into digital form. Synchronizer 5 provides a temporal sequence of operations when the signal processing means 3. Chosen as the criterion for dividing the normalized autocorrelation function SNIn(pigv) signal UIN(t) luminescence air. To do this, using MP 11 gain values of the autocorrelation function SkInsignal UIn(t) luminescence of air as a function of parameter kIn=Δt/t1 separation of discrete summation of the works recorded signal on the same signal, but shifted in time by a given value of kInthe sort parameter according to the formula (1), determine the value of the autocorrelation function and So Inwhen kIn=0 according to the formula (2) and normalized values of the autocorrelation function SkInby dividing the result of SoIndiscrete summation of the square of the detected signal Uin(t) luminescence of air according to the formula (3). Set the same threshold values P1 and P2 of separation, as in the operating mode of the separator. Set using register 10 delay value of kInseparation is less than the value of parameter kpseparation, which set the operating mode of the separator (kIn<kp), and compare with MP 11 the resulting value SNinthe criterion of separation specified by register 9 thresholds P1 and P2. If the value SNinexceeds the lower P1, but not P2 exceeds the upper thresholds (pigv), believe that the controlled parameters of the separator correspond to the work, and MP-11 with a control output to the actuator 4, the signal separation enriched mineral. If the value SNIndoes not fit in the range specified in the lower P1 P2 and the upper thresholds, consider that the controlled parameters of the separator does not correspond to the work, and MP 11 outputs to the display panel signal “ACCIDENT” (communication to simplify figure 1 is not shown).

In the proposed method of control as an indicator of use in the exposure zone (air that provide which ensures the implementation of the control mode of the separator with a pulsed excitation source 1 using the same hardware, that use to implement its operating mode. The implementation of the control mode of the separator with continuous excitation source 1 requires modulation of the detected signal UIn(t) luminescence of air that can be done by increasing (only at the time of control operation of the separator) time delay device Del2 18 synchronizer 5 to values significantly (by one to two orders of magnitude) than the time period of data accumulation n·t1.

Thus, the proposed fluorescent separator minerals and the method of controlling the operation of the separator provide improved selectivity of separation of the source material. The selected criterion to split the autocorrelation function of the signal luminescence provides the elimination of the influence of noise tract of registration, measurement error and instability of the excitation system when deciding on the division of minerals or the quality of work of the separator, which increases the accuracy and reliability of results. The invariance of the normalized autocorrelation function in relation to the changing intensity of luminescence allows even and auto registration systems and excitation. The use of such a criterion of segregation during enrichment allows not only to improve the quality of enriched product, and efficiently produced is led to the enrichment of several minerals, contained in the original material. In addition, the proposed method of controlling the operation of the separator can reduce the amount of used hardware, to organize the automatic pre-and periodic monitoring by switching the modes of operation of the separator, and also to increase the reliability of the control.

1. Fluorescent separator minerals containing money supply and transport raw material in the detection zone, the source of excitation radiation, connected in series logger signal luminescence of minerals, made in the form of at least one photodetecting device, and means for processing the signal of luminescence, including connected by a data bus analog-to-digital Converter (ADC), block random access memory (RAM), a register threshold separation and the microprocessor to carry out the functions set threshold separation, processing of the digital signal values of luminescence according to the criterion of separation, comparing the obtained values of the criterion of separation with a given threshold and generate a signal control actuator, characterized in that the separator have been added to the register delay and synchronizer, the first output of which is connected to the input of the start of the ADC, the second output is connected to the input of RAM, and a third input of the recording of the microprocessor, inputs read RAM, register threshold and register delays are connected respectively with the first, second and third outputs of the microprocessor, data bus, which is made in the form of bus data processing means connected to the output register delay, the microprocessor is equipped with the ability to set the parameter as the number of time delays and the possibility of processing the digital values of the luminescence signal to obtain the values of the autocorrelation function as a criterion for dividing by creating offset by a specified time delay copies of the luminescence signal and the multiplication of these signals with subsequent discrete summation of the multiplication.

2. The separator according to claim 1, characterized in that the microprocessor is further provided with the opportunity to implement a rationing obtained values of the autocorrelation function of the luminescence signal by dividing by the discrete summation of the square of the luminescence signal.

3. The separator according to claim 1, characterized in that the source of excitation radiation in the form of x-ray source designed for operation in continuous mode, and the detection zone is formed in such a way that allows you to record the luminescence of minerals and after its exit from the zone of radiation.

4. Separ the tor according to claim 1, characterized in that the excitation radiation source is made in the form of a pulsed x-ray source, the zone of irradiation and detection are the same.

5. The separator according to claim 1, characterized in that the separator is provided with the possibility of registration of luminescence of minerals from the side facing the radiation source, and/or opposite to the radiation source side.

6. The method of controlling the operation of the separator, including exposure indicator stimulating radiation in the absence of a detection zone of the separated source material, the registration signal intensity of the luminescence indicator, the processing of this signal according to the selected criterion of separation, issuing commands to the actuator by comparing the results obtained values of the criterion of separation with a given threshold, counting the number of detections and comparing this number with the number of cycles of irradiation, wherein registering the intensity of the luminescence signal of the air, is selected as the indicator is chosen as a criterion for dividing the normalized autocorrelation function of the luminescence signal, which is obtained by integration or discrete summation works recorded signal on the same signal but that is shifted in time by a given value of the parameter and the values of the autocorrelation function of the signal luminescence normalized by dividing by the result of integration of the square of the detected signal of luminescence, set the threshold separation equal to the threshold, as set by mode of separation, and the value of the sort parameter is chosen so that the value of the autocorrelation function when the selected parameter value exceeded the threshold.

7. The method according to claim 6, characterized in that the radiation produces pulses of x-rays.

8. The method according to claim 6, characterized in that the radiation produces a continuous stream of x-rays, while the recorded luminescence signal pre is converted into a sequence of pulses using electrical modulation.



 

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The invention relates to the field of mineral processing, more specifically to a device for radiometric separation of ores

The invention relates to the mining industry, namely the preliminary mechanical processing of metals, and can be used in the processing of copper-Nickel ores

The invention relates to metallurgy, in particular to the sorting of waste and removing additional silicon

FIELD: mining industry; diamonds mining.

SUBSTANCE: the invention is pertinent to mining industry, in particular, to diamonds mining. The technical result of the invention is increase of electrical safety of a separator and reliability of its operation with simultaneous decrease of weight and dimensions of a power supply source for an X-ray tube. The separator contains a device of loading of a feed stock, a chute for delivery of the feed stock in a zone of detection of a required product, an X-ray tube connected to a source of its power supply, a photomultiplier, a block of control and data processing, a device for separation of a target product and a device for separate collection of the target and the end products. The source of power supply for the X-ray tube contains a transducer of mains voltage into low-voltage high-frequency voltage, a high-voltage transformer and a voltage multiplier. At that the high-voltage transformer and the voltage multiplier and also the X-ray tube are placed in a hermetic body filled in with a high-voltage insulating substance. One wall of the body has an opening, in which there is a fixed anode of the X-ray tube, which window for pass of the X-rays protrudes beyond the limits of the body.

EFFECT: the invention ensures electrical safety of a separator and reliability of its operation with simultaneous decrease of weight and dimensions of a power supply source for an X-ray tube.

1 dwg

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