SU1400641A1 - Method of automatic control of thickening mineral raw material - Google Patents

Abstract

The invention relates to synthetic methods, an anti-iron cryiiu and a mineral (1) raw material and can be used in meta. The chemical, chemical and other industries of the industry. The use of the method allows to intensify the process of condensation of mineral raw materials in thickeners. The method provides for calculating mass consumption of the dried product Hoi o and a thickener, regulating Bainie pacxo.ia c1L of the first product with correction but for the mass flow rate of the discharge and control, 1Ip: 1H11e of the flow rate of flocculant in the condensation tank :) avps11MO1. gi from the sum of the mass costs of the discharge and condensed product. However, the flow rate of the bunched product from the thickener is reconciled by forming (10) og) –1azn111x in time of movements. 1 1Llyusruyushchy body relative) current; nei) output signal value .1 - (g, consumption. 1 cn f-ly , 2 ill. &Amp; (L

Description

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From () b) etienia oik egs to methods of automatic control of the condensation of mineral raw materials and can be used in the exclusive factories, metallurgical enterprises, and also in the chemical industry and in construction: 101.

lle. ibio i: n) ws1 c.1 ingress the cgc shade process.

Pa (|) 1 representations, leiia partner1 on the scheme of the system of automata I HMccKoro u11) ai.: 1 by the process of minerals and minerals 1H1, raw material, and k) 1csy proposed method; ) ia (f) iir. 2 graph and: {men (41i in time

admin. Inimch) sigt1a, 1a) Egu.t torus condensed product.

(lusob afiTOMa of the control of the process of curing the mineral of the minerals 1) I am carried out with the help of o6i) a: u) M.

The initial pulley threading inevitably enters the thickener, where it is separated into a scool 1l 111) 1H product (bottom product) and a drain (upper product), the flow rate Q and volume of Q are continuous smoker and | pc) T respectively by sensors I and 2 points of flow and flow sensors 3 and 4 o6ijeMHoro, output s1 on; 1s of which are served on .1ite.chpy.h blocks 5 and 6, calculate the mass flow of condensed product and discharge the sst of stover by the formula

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 At 1

Q,

where 6 is the density of the mine) of solid particles (correction is introduced into the calculator) 1e b. Yuki 5 and 6 when changing Tina raw).

(l1gpal1) 1 mass flow rate of crymeHHoi o product and stiva from the outputs of the computing units 5 and 6 through the blocks 7 and 8 of the signal multiplication: 1ov is fed to the inputs of the regulator t - torus 9 of the condensed product, where the output signal of the computing unit 5 is compared with the setpoint of the setting device and when they mismatch the control signal with the circuit: 1 correction of the zero-amplitude oscillations from the output of the regulator 9 is fed to the input of the generator 10 sawtooth signals, the output signals of which are fed to the actuator 11 regulating opiaHa 12 cryHieiinoro of the product.

The mass flow rate drain signal from the output of the computational bullet point 6 through the signal multiplication unit 8 is fed to the input of the flow controller 9 for the condensed product in order to limit its range of control over drainage. For example, at the value of the mass flow rate of the drain, which is within the limits of the established range, calculate the output from the unit 6 to the input) of the control 9 and give the setpoint correction signal.

five

0

five

0

five

0

five

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proportional values exceed the set range. In this case, if the upper limit of the range is exceeded, correction is directed;;

From the second outputs of blocks 7 and 8 of the unpowered supply, the signals of the mass consumption of the dried product and the drain are fed to the inputs b. The summation signal 13, from the output of which the signal of the total mass flow rate of the mineral raw material from the thickener is fed to the input of the flow rate controller 14, corrects the setpoint of its setting device. The output signal) of the torus 14 acts on the execute. mechanism 15 regulates it 01) ghana 16 to feed flocculant into thickener 17.

(the control system provides for an additional) correction of the setpoint of the flow regulator 9 of the cryniennoro product according to the signal of the control system subsequent to the apparatus technology or from the central control computer at the time of ore type ore.

Mass flow ratio measurement range

p.1iia, the amplitude of YN, U "ak, and the period T and the image-like oscillations of the regulator of the crouched product are established during the period of adjustment of the system (Fig. 2). The current value of the control signal of the regulator of the condensed product YT ,. shown by the dotted line. At each pulse, the mineral particles in the thickener 17 travel a long distance, which leads to an acceleration of their concentration and separation along thinner K.iaccy.

Claims (2)

Invention Formula . (lyusob avto.maticheskogo control of the process of thickening the mineral raw material, measuring the density of the dried product and the density of the discharge and controlling the consumption of the dried product and the flow of flocculus, characterized in that, in order to intensify the process of thickening, the volume flow rate of the condensation is additionally measured HHoro product and volumetric discharge flow rate, determine the mass flow rate of the dried product and the flow rate mass of the discharge and regulate the mass flow rate of the condensed product with correction for the flow mass flow of discharge, and the flow rate of flocculant It is adjusted depending on the sum of the mass flow rates of the dried product and liva, thereby producing a pulsed change in the rate of mixing of the medium in the thickener. 2. A method according to claim 1. characterized in that the change in the velocity of the medium in the thickener is made according to the sawtooth law by changing the current value of the consumption of the condensed product. initial JMUKC -, C i / um product 1 t sec