SU1031509A1 - System for automatic control of wet disintegration cycle - Google Patents

Abstract

The AUTOMATIC CONTROL SYSTEM of the SINGLE-WIPER SINGLE CYCLE CLEANING piping is located inside the gauge of the flow sensor; Having a nocrte-connected particle size sensor and a second secondary device, the first output of which is connected to the first input of the water flow controller in passifier connected through an appropriate actuator mechanism with a corresponding valve, a water flow meter in the control circuit, having a connected water flow meter and a third secondary device connected to the first flow regulator input to the corresponding actuator with a corresponding valve, contour of water flow control in the classifier, having a sequentially connected water flow meter and the fourth secondary device, contour of coax a source of ore in the source ore, having a connected sensor for depletion of a useful KON element and a fifth secondary device, a contour of a physical parameter having a sequentially connected sensor of a physical parameter and a sixth secondary device, a control value correction contour having a computer, to the inputs of which the first outputs of the first and second secondary devices are connected, the second outputs of the second and fourth secondary devices, the output of the fifth secondary device, the first output the computing device is connected to the first input of the ore consumption regulator, to the second input of which the fourth secondary device 8 is connected, the second output of the computing device is connected to the second input of the regulator {outflow of water to the classifier, and the third output of the computing device is connected to the second input of the QO regulator of the consumption torus water into the mill, from l and S h a w y a so that, in order to improve the quality of control by reducing the time of the transition process and the number of search fluctuations of control quantities, it is It is equipped with a multiplication unit, to the input of which the second outputs of the first and sixth secondary devices are connected, the first output of the multiplication unit is connected to the third input of the ore consumption regulator, and the second output of the multiplication unit is connected to the third input of the water consumption regulator. the mill

Description

The invention relates to the automatic control of technological enrichment processes, and more specifically to automatic control systems for the wet mixing process, and can be used at the processing plants of non-ferrous and ferrous metallurgy, have similar cycles of processing raw materials.

A system for automatic syphilization of the one-stage wet cycle is known. the changes include a system for stabilizing the flow rate of the original ore in the field, a stabilization system for the particle size of the kpassificator – system for the stabipweiin ore – water ratio, a system for measuring the amount of water supplied to the passifier for the system for correcting the volume of ore into the mill according to the amount of land, the amount of land, l1.

in this system, 1bt was used for the correction of water consumption in the field of co-operation as a result of the 1st class of Sand Classifier,

The disadvantage of the system is the impossibility of achieving maximum production in accordance with the finished product of a given class with changing physico-mechanical characteristics of the raw material. This is due to the fact that when regulating according to a known system, the optimum density in the mill, which corresponds to the quality of the processed raw material, is not maintained, since the used day for the correction of ore and water consumption in the mill, the size parameter of the classifier sands does not fully characterize the change in type of source | Noah ore.

And the consequence of this corrective action cannot bring the grinding unit to the area of optimal modes, and in connection with this there are significant technological fluctuations. Parameters and low quality control of the wet process is crushed, which leads to emergencies.

The closest technical solution to the assumption is an automatic control system for a single-step wet-measurement cycle, comprising a flow stabilization circuit for the original ore to the mill, which has a successively connected oriod flow sensor and the first secondary device sequentially connected to the ore consumption regulator and the control unit the motor of the drive of the feeder, the circuit for stabilization of the particle size of the classifier drain, which have both connected sensors of size and a second secondary device, first The output of which is connected to the nei time of the input of the water flow regulator to the classifier, connected through the corresponding actuator with the corresponding valve, the flow control loop of the mill, having a series-connected water flow meter and a third secondary device connected to the first water flow regulator input the mill connected to the appropriate actuator with the appropriate valve, the control circuit of water flow in the classifier, collection of serially connected p a water flow meter and a fourth secondary device, a centur for controlling the content of a useful component in the original ore, having a series-connected sensor for containing a useful component and a fifth secondary device, a physical parameter control loop, having a series-connected physical parameter sensor and a sixth secondary gf, control correction cohur lmekatsy computing device, to the inputs of which are connected the first steps of the first and sixth secondary devices, the second turns of the second and fourth secondary devices, output of the second secondary device, the first output of the computing device is connected to the first input of the ore consumption regulator, to the second input of which the fourth fourth device is connected, the second output of the computing device is connected to the second input of the water consumption regulator to the kiassifier, and the third The output of the computational yiJTpoficTBa is connected to the second input of the water flow regulator in the control unit-f2l.

The computing device performs the impregnation of the initial ore into the 1st measured flow rate in the classifier, the physical parameter characterizing the pulp condition and the content of the useful component in the discharge of the classifier, evaluating the crushability of the original ore from the measured ore and water consumption in the physical parameter mill, characterizing the pulp and fineness of solid in the upper classifier and the content of useful xc component in the passport classifier, control correction loop KoppeiSfuyuuuuuuuuu saisen ore to the mill depending on the emulsion of the ore and the correction of the classifier’s specific size and correspondingly {oei-ore-water according to the vein-type level. In this system, the density of the pulp or the specific weight of the solid in the pulp, the measurement in the discharge of the classifier, is used as a phy cell parameter that characterizes the state of the pulp. The disadvantage of the system is the demanding nature of establishing the optimum value of the P7V value of the puppets in the field, the possibility of oscillations in the search mode for the optimal values of the control quantities, and because of this low quality of control. The purpose of the invention is to increase the quality of control by reducing the time of the transition process and the number of search managers. The goal is achieved by the fact that the automatic control system of the one-step wet measurement cycle; containing the source ore flow stabilization circuit in the mill, having a series-connected ore consumption sensor and the first secondary device, the ore flow controller connected in series and the control unit of the drive drive motor, the classifier’s particle size stabilization circuit, the series-connected size sensor and the second secondary device , the first gamohod of which is connected to the first input of the water flow regulator to the classifier, connected through an appropriate actuator with a By the corresponding valve, the water flow control loop in the mill, which has water pecxoQCHkfep connected in series and the third secondary device connected to the first inlet of the water flow regent torch in the mill, connected to the corresponding executive mechanism with the corresponding gate, the water flow control loop in the classifier, having a chemically connected water flow meter and a fourth secondary device, the control circuit of the content of the useful component in the ore, which has series-connected dates The content of the useful KCtfvtnoHeHTa and the fifth secondary device, the physical parameter control loop, which has a physical parameter sensor connected in series and the sixth secondary device, the control value correction loop, the best computing device, the inputs of which connect the first outputs of the first and sixth secondary devices second out | dy. the second and fourth secondary devices, the output of the second secondary device, the first output of the computing device is connected to the nepBbJM input of the ore consumption controller, to the second input of which the fourth secondary device is connected, the second output No. 1 of the computing device is connected to the second input of the water consumption regulator to The third output of the digital device is connected to the second inlet of the water flow regulator in the mill, it is additionally equipped with a multiplication unit, to the input of which the second outputs of the first and the pole are connected of secondary devices, the first multiplying unit output is connected to the third input of the ore flow regulator of the torus, and the second output multiplying block is connected to the third input of the regulator in the torus flow mill. The drawing shows a block diagram of the automatic control system of a one-step wet grinding cycle. The scheme includes a circuit for stabilizing the flow rate of the original ore in Mepavcca, having a weight operity of 1 ore consumption, the first secondary device 2, the multiplication unit 3, the adaptive controller 4, the control unit 5 for the drive converter 6; stabilizer grain size stabilization circuit, having a grain size sensor 7, second secondary device 8, regulating device 9, actuator 10, valve 11, water flow meter control circuit, having a flow meter 12, third secondary water flow meter 13 into the mill, adaptive regulator 14,. actuator 15, valve, 16; contour of water flow control in the classifier, having a flow meter 17, a fourth secondary device 18 with an output to the regulator 4; contour control fi-. a physical parameter characterizing the state of the solid in the pulp, having a sensor 19 of the physical parameter (solid size) of the solid phase and the fifth secondary device 20, with output to the multiplication unit 3. The density of the solid phase can be measured both in the original ore, so on and in the discharge of the mill and passivity the circuit for controlling the content of the useful component in the original ore, having

21 sensors of useful component and sixth secondary device 22; a control value correlation kit, which has a computing device 23 with access to the controllers 4.9 and 14. The computing device 23 can be made of sub-blocks of the control system with the land structure KTS LIU SUPO-2, and based on the C5 Electronics microprocessor of the Electronics C5 series .

The single-stage wet-grinding cycle complex consists of a mill 24 operating in a closed cycle with a classifier 25.

As a classifier of the apparatus, both mechanical one- and two-spiral classifiers and hydrocyclones can be used. Wet grinding processes are controlled by affecting the ore and water consumption in a ball mill and the water consumption in a kaosifikator as follows. ,,

Optimal filling and pulp density in the mill is maintained by controlling the flow of water and ore into the mill with appropriate systems for the main control loops: 12-13-14-15-16 and 1-2-3-4-5-6.

When the physicomechanical properties of the original ore change, for example, during the transition from solid ores to soft ores, the content of the finished class in the discharge of the classifier increases, and the productivity of the finished product increases. The signal of the current size of the classifier discharge from the size sensor 7, through the secondary device 8 is fed to the adaptive controller 9, which changes the water flow to the classifier through the actuator 1O and the valve 11 to the classifier to restore the specified size. In the adaptive controller 9, the signal of the current size from the sensor 7 is processed to determine the dynamic transmission coefficient over the water flow channel and the drain drain. The magnitude of the control action from the regulator 9 is supplied with regard to the variable dynamic transmission coefficient, which is compensated for by the variable amplification factor of the adaptive regulator 9.

Due to the change in the flow rate of water into the drain of the classifier, the density of the pulp and the circulating load of the cycle changes, and their change is proportional to the change in the flow of water to the drain of the classifier. The amount of change of the WATER flow into the classifier's discharge is used to correct the flow rate of the original ore into the mill, increasing it by the signal from the water flow meter 17 through the secondary device 18 to the regulator 4 of the flow control system of the original ore, which through the control unit 5 changes the engine speed 6 the drive of the feeder, increasing the flow rate of the stream) into the mill to such an extent that it maintains the optimum filling of the mill, proportional to the weighted sum of the flow rate of the original ore and the water flow to the drain of the classifier. The weight factors with the terms in this sum take into account the percentage of the share of the weight of these parameters in the formation of the mill filling.

Depending on the adopted control strategy of the technological enrichment process, the technological enrichment scheme and the type of equipment installed. I, the overall objective control function to maximize the quantity and quality of concentrate, with restrictions on the loss of the useful component in the tailings of magnetic separation (flotation), can correspond to various subordinates control criteria for single-stage cycle-maximizing performance on the newly formed class or maximizing performance on the design basis is ready class, taking into account the grindability and impregnation of the original ore, as the most common characteristics of the type of processed material.

. The achievement of the overall objective function can be achieved if the development of control actions takes into account the assessment of the grindability and impregnation of the original ore. The achievement of the extremum of the partial (subordinate) target control functions is possible by controlling and taking into account the lunch physical parameter, characterizing the properties of the pulp and the properties of the solid in it.

In the case of the first type subordinate to the target function, the single-stage cycle control criteria use the coarseness of the solid measured in the mill drain, and in the case of the second type of control criteria, the density of the solid phase measured in the mill drain or classifier is used. The point of measurement of the density parameter of the solid phase does not affect the quality and accuracy of the control of the single-stage cycle, if spiral qualifiers are used as the classifying apparatus. In the case of using hydro-cycloi, the advantage in determining the density of the solid phase is given to either feeding the mill or feeding the hydro-tilt, since the spacer (ка 1 in gyro-ions) is carried out both by the size of the crushed material and by the density of the solid phase, and as a result, the density is measured. the solid phase only in the discharge or sand of the hydrocyclone does not fully characterize the type of ore processed.

The HavieHeHHe physicomechanical and textural structural properties of the ore being processed, fixed by the sensor 19 of a physical parameter, through the secondary device 2O enters the input of the specialized computing device 23 and the input of the multiplication unit 3 and further to the adaptation circuit of the regupertor 4, which through block 5 and the converter motor 6 performs perturbations on the initial power supply, and in the case of using a grain size sensor solid in the mill discharge, and on the condition of the lining and balls, until the extrema of particular control criteria is reached cycle events.

The signal is proportional to the product of ore consumption by the amount of a physical parameter characterizing the state of solid in the pulp from the multiplier 3, also pa regulator 14 of the system for controlling the flow of water into the mill, which through the actuator 15 and the valve 16 changes the flow of water into the mill, the drive its in accordance with the amount of ore processed, taking into account the fulfillment of the requirements of the private criterion of dictation management. In this way, we stabilize the operation of the measuring complex and achieve an increase in productivity both in the initial feed and in the weight yield of the finished product, while not allowing for the over-grinding of the feedstock.

Maintaining the stabilization size (commercial granulometric characteristic) of the finished product in the classifier discharge ensures that the conditions for reaching the extremum of the overall objective control function are met, and it is possible to evaluate the tempo with the process of generalized characteristics of the type of ore being processed - disseminated and crushed. The magnitude of the physical parameter characterizing the properties

solid in the pulp measured by the sensor 19, the magnitude of the useful component content measured by the sensor 21 and the flow rate of water in the drain of the classifier measured by the flow meter vidt 17 in a specialized number device 23 are evaluated for characterizing changes in the structure of the ore, and the structure of the original ore, for example, the initial ointment ore, and in addition to processing, secret signals of ore and water consumption, for a single-stage cycle, a physical pair of meter, size of solid classifier in the discharge, the content of the useful component in the original ore, measured by the corresponding sensor 1, consumption of L7, sensors 19.7 and 21, the physico-mechanical properties of the original ore, such as grinding, are evaluated.

A change in the structural and phi of the zyko-mechanical properties of the components of the ore charge entering the section, or a change in their ratio in the ore charge, necessitates a change in tolerances for the main operating parameters of the cycle, such as the required pulp density in the mill, the degree of grinding and the type of the commutative characteristic of the grinding product in the discharge of the mill; the maximum possible output of the section is on the ore and on the finished (calculated) product of the cycle.

In accordance with experimental statistical dependencies, which take into account the fractional participation of the monitored parameters in the change of estimated values, impregnations and shredded values, the values of corrections to the regulators 4, 9 and 14, which change the flow of water and ore in the mill, are determined in the computing device 23 depending on the change in grindability, and the change in water consumption in the class of the cutter in

depending on the change in splashed. g

This is how the grinding complex is put into the mode of maintaining the maximum possible yield (ore-type ores), the particle-size characteristic of the grinding product in the mill and the classifier is stabilized, and the quality of control of the one-stage wet-grinding mixture is improved.

When increasing the size of the finished product in the discharge of the classifying apparatus, the operation of the stabilization circuits and

910

Correction occurs in the opposite direction.

All correction signals come with coefficients that are determined empirically and take into account the procedural steps. The additional fate of corrective pairs (ametrov.,.

The management of a single-stage wet grinding cycle by the proposed system ensures the maintenance of the optimum performance of the grinding unit for the initial power supply, taking into account the grindability and particle size of the original product, given the requirements for the granule composition, the score is 09 .10

and optimal pulp density in the mill, corresponding to the quality of the processed material.

The quality of control of the process is improved by taking into account the reaction of the circulating load at the initial power supply more early.

The yield of the finished product increases by 0.22%, the fluctuations of the particle size distribution noticeably decrease, the annual production of concentrate increases by 0.5%, the loss of the useful component in the tailings decreases by 0.2%.

Claims (1)

SYSTEM OF AUTOMATIC CONTROL OF ONE-STAGE WET GRINDING CYCLE, containing a stabilization circuit for the flow of the initial ore to the mill, having an ore flow sensor connected in series and a first secondary device, an ore flow regulator and a feeder drive motor control unit connected in series, a classifier of the classifier size and a second secondary device, the first output of which is connected to the first input of the water flow regulator in class an indicator connected through an appropriate actuator with a corresponding valve, a circuit for regulating the flow of water into the mill, having a water meter in series and a third secondary device connected to the first input of the regulator of water flow in the mill, connected to the corresponding actuator with a corresponding valve, a flow control circuit water in a classi fixture having a water flow meter and a fourth secondary device connected in series, a floor content control loop a valuable component in the source ore, having a sensor for useful component content and a fifth secondary device connected in series, a physical parameter control loop, a physical parameter sensor and a sixth * secondary device, a control variable correction loop having a computing device, the first outputs are connected to its inputs , the first and sixth secondary devices, the second you, the moves of the second and fourth secondary 'devices, the output of the fifth secondary device, the first output of the calculator The first device is connected to the first input of the ore flow controller, to the second input of which the fourth secondary device is connected, the second output of the computing device is connected to the second input of the water flow controller to the classifier, and the third output of the computing device is connected to the second input of the water flow controller to the mill, from and the fact that, with a chain to improve the quality of control by reducing the time of the transition process and the number of search fluctuations of control quantities, it is additionally equipped with multiplication unit, to the input of which the second outputs of the first and sixth secondary devices are connected, the first output of the multiplication unit is connected to the third input of the ore flow regulator, and the second output of the multiplication unit is connected to the third input of the water flow regulator c. mill.