SU1447411A1 - Apparatus for automatic control of obtaining flotation concentrate in flotation machine - Google Patents

Abstract

The invention relates to enrichment and is intended to automate the management of the flotation process. The goal is to improve the control accuracy by maintaining an equality of the ratios of the particle size distribution and density to the factor of recalculation of dividers. The device contains a sensor of particle size distribution of initial flotation power 1, density 3 and flow 5 with converters 2.4 and 6 into frequency, crystal oscillator 7, elements 8-10, clock divider 11 frequencies, dividers 12-14 frequencies, triggers 15 and 16, an OR 17 logic unit, a subtractor 18, a pulse counter 19, units for varying the flow rates of the blowing agent 20 and the collecting agent 21, and the reagent metering units 22 and 23 on the scraper machine 24. The signals of the sensors 1,3 and 5 are processed by introducing coefficients. converting the sensors and the coefficient of recalculation of dividers 12-14. As a result, the relations of the coeff. granulometric composition to the first divider 12 and coefficient of density to the second divider 13. At the same time, the quality of the feed control of the collector and foaming agent will increase. 1 il. F (L 4ib 4ib vl 4ib

Description

14

The invention relates to an enrichment process, S in particular for automating the control of a flotation process.

The purpose of the invention is to increase the control accuracy by maintaining the equality of the ratios of the coefficients of grain size distribution and density to the coefficients of recalculation of divide, lei.

The drawing shows the block diagram of this device.

The device contains a sensor 1 of particle size distribution of the initial flotation agitation with the first converter 2 into frequency, a density sensor 3 with a second converter 4 into frequency, a flow sensor 5 with a third converter 6 into frequency, quartz generator 7, first element 8, second element 9 , the third element AND 10, the clock divider P frequency, respectively, the first, second and third dividers 12-14 frequency, the first and second triggers 15 and 16, the logical element OR 17, the subtractor 18, the counter 19 pulses, blocks 20 and 21 changes, respectively, flow in reagent - foaming agent and reagent - collecting bodies; reagent dispenser 22 - foaming bodies and reagent dispenser 23 - collecting bodies into a flotation machine 24.

The sensor 1 of particle size distribution is connected to the first converter 2 to frequency, the density sensor 3 is. with the second converter 4 into frequency, the flow sensor 5 with the third converter 6, the output of which is connected to the first inputs of the first, second and third elements 9-10, the second input of the first element 8 and 8 connected to the output of the first converter 2, the second input of the second element And 9 is connected to the output of the second converter 4, the second input of the third element And 10 is connected to the output of the crystal oscillator 7, the output of which is also connected to the input of the clock divider 11 of the frequency. The outputs of the clock divider CBHsaiui with the first zero inputs of the triggers 15 and 16. The second inputs of the first and second triggers 15 and 16 are connected to the outputs of the first and second dividers 12 and 13, respectively. The inputs of the first, second and third dividers 1,2-14 frequencies are associated respectively with the outputs of the first, second and third

P

5 p 5 Q

0

five

elements IV, 9 and (0. The outputs of the trigger 15 and 16 are connected to the inputs of the element OR 17, the code of which is connected to the first input of the subtractor 18, the second, the input of which is connected to the output of the third frequency divider 14. The output of the subtractor 18 is connected to the counter 19 pulses, the output of which is connected to the inputs of the blocks 20 and 21 of the changes in the costs of the foaming agent and collector reagents, the outputs of which are connected to the dispensers 22 and 23 of the blowing agent and collector reagents, which dispense the frother and collector to the flotation machine 24.

The system works as follows.

When the flow rate and the quality of the initial power supply of the flotation machines are changed, the sensors 1 and 3 through the converters 2 and 4 frequencies produce a signal with frequencies f (and f

f, fo, + k, g; f toz + q k g,

where f and fo2 are the initial frequencies of the sensor signals;

k, and k are the transform coefficients of the sensors; and q; - coefficients that take into account the distribution of signals from sensors of particle size distribution and density. 5 flow through the inverter 6 produces a frequency pulse proportional to the flow.

These pulses arrive at elements AND 8 and 9, allowing signals from converters 2 and 4 to pass through dividers .12 and 13 frequencies and then to single inputs of flip-flops 15 and 16. Summation of frequencies of converters 2 and 4 is performed by a circuit consisting of a generator 7, clock divider 1 frequency, triggers 15 and 16 and the element OR 17.

For this, the next pulse from the splitter 12 (or 13) frequency sets the trigger 15 (or the trigger 16) to one state. The clock divider 11 frequencies to the zero inputs of the flip-flops 15 and 16 alternately receive pulses that return these triggers to the zero state. Thus, the unit states of the triggers 15 and 16 are read and through the elements OR 17 arrive at the summing input of the subtractor 18. If the output is

14474

the frequency of the clock divider 11 frequency exceeds the maximum frequency at the output of each of the dividers I2 and 13 frequencies, all pulses received from the outputs of dividers 12 and 13 are read and the total number of pulses received at the input (+) of the subtractor is determined by the formula

N (+) K.-f +,

TO

na

Where

B is the measurement time; ni n-z. conversion factors

Divisors 12 and 13 are often you.

By changing the value of one of the conversion factors of the dividers of 12 or 13 (Kn, or K), the frequencies achieve equality

ii.

In this case, the second (subtractive) input of the subtractor 18 from the generator 7 through the element And 10 and the divider frequency 14 receives pulses in the amount of:

1xK

f.cdt.

43

where f is the frequency of the signal generator 7;

K is the coefficient of recalculation of the divider frequency 14, When conditions are met

Q-i P1

 IT

to

ПЪ

The number of pulses transmitted to the input of the counter 19 pulses

N N (+) - N (-),

from where the pulses come to blocks 20 and 21 of changing the costs of the foaming agent and collector reagents, and depending on the number of pulses, the dispensers 22 and 23 serve a certain amount of the foaming agent and collector to the flotation machine 24.

The proposed device allows to process signals from flow, particle size and density sensors by introducing transform coefficients of sensors and coefficients of recalculation of dividers, which results in the equality of relations

j,

0

0

five

0

Claims (1)

the zero-gauge composition to the first divider and the density coefficient to the second divider, which increases the quality of the feed control of the collector and foaming agent. Invention Formula A device for automatic control of the flotation concentrate production process in a flotation machine, containing sensors for the particle size distribution of the initial flotation feed, density and flow rate, flow meter of the blowing agent and collector reagents, the outputs of which are connected respectively to the blowing agent and collector reagent dispensers in the flotation machine, which is increase control accuracy by maintaining equality in the ratios of the coefficients of the grain size and density to the coefficient there is a divider recalculation, it is equipped with three frequency converters, a quartz oscillator, three H elements, a clock frequency divider, three frequency dividers, two triggers, a 1-SHI element, a subtractor, a pulse counter, the output of which is connected to the inputs of the reagent consumption units foaming agent and collector, and the sensors of the particle size distribution of the initial flotation power, density and flow, respectively, are connected to the inputs of the first, second and third frequency converters, the third output The first frequency converter is connected to the first inputs of the first, second, and third elements, the second inputs of which are respectively connected to the outputs of the first and second frequency converters and a quartz oscillator connected to the input of a clock frequency divider whose terminals are connected to the first trigger inputs connected to the inputs of the OR element connected to the first input of the subtractor, while the outputs of the first, second and third elements And are connected respectively to the inputs of the first, second and third dividers part oy, the output of the latter is connected to the input of the subtractor connected to the input of the pulse counter., and the outputs of the first and second frequency dividers are connected to the second inputs of the flip-flops.