SU1654626A1 - A system for controlling crude iron ore lumping - Google Patents

Abstract

The invention relates to metallurgy, in particular to the process of the work of iron ore. The purpose of the invention is to improve the accuracy of controlling the consumption of finished pellets, as well as to improve their quality and increase the yield. The system measures the flow rates of the finished pellets by the sensor 24 and the return by the sensor 17, determines the signs of their derived blocks 18 and 27, and also produces a regulating effect on the controller 32 for changing the flow rate of the concentrate and the binding additive depending on

Description

The invention relates to metallurgy, in particular to the process of pelletizing of iron ore raw materials.

The aim of the invention is to improve the accuracy of controlling the consumption of the finished pellets, as well as improving their quality and increasing the yield.

The drawing shows a block diagram of the proposed system.

The system contains dispensers of i-imcentrate 1, flux 2 and binding additive 3, concentrate hoppers 4, flux 5 and compressing additional b, mixer 7, pelletide O, concentrate consumption flow sensors 9, flux consumption 10 and connecting dobeoki consumption 11, unit 12 for the ratio of concentrate and flux costs, controller 13 for the ratio of concentrate and flux costs, unit 14 for the ratio of concentrate and binder, controller 15 for concentrate and binder, sizer b, return flow sensor 17, first differentiator 18, logical bl to 19 funtskionalny converter

20, the amplifier 21, the switch 22, the non-linear unit 23 and the sensor 24 of the finished neck necks.

The nonlinear block 23 contains a coaxial sensor 24 of the bat pellets, a master 25 of ready-made pellets, a block 2C of comparison, a differentiator 27, a block 28, module extraction, a block 29 multiplying pi pi 30, an adder 31 and a regulator 2 and mchf m fi comparisons correspond to the first and second inputs of the nonlinear b / cm 23, and the output of the differentiator 27 and the controller 32, respectively, the first and second outputs of the nonlinear block 23 The output of the sensor 17 of the return flow is connected to the input of the differentiator 18 and the input of the functional transducer 20. ate whose output is connected to the first input usilitelp

21, the output of the differentiator 18 is connected to the first input of the logical Ztsk 19, the second inputs of which and the amplifier 21 are connected to the first output of the nonlinear unit 23, the output of the logical unit 19 and the second output of the nonlinear unit 23 are connected respectively to the first and second inputs of the switch 22, the first and the second output of which is connected respectively to the inlet of the setting device 14; the ratio of concentrate — binding agent and the inlet of the dose 1 of concentrate; The output of the amplifier 21 and the sensor 24 of the finished pellets are connected respectively to the first and second inputs

nonlinear block 23

The system works as follows.

The consumption of the finished pellets is measured

sensor 24, the output of which

is compared with the setting signal 25 in comparison unit 26. The signal from the output of the comparator unit 26 is fed to the input of the differentiator 27, in which the derivative of the flow rate of the prepared pellets is formed. The return flow is measured by sensor 17, the output

the signal of which is fed to the input of the functional converter 20 and the input of the first differentiator 18, where the derivative of the return flow is formed.

Signal derived consumption flow

the pellets from the downstream of the differentiator 27 is attenuated to the second inlet of the amplifier 21, where the signal from the output of the functional converter 20 changes the gain of the amplifier 21. Depending on

the gain factor is changed, the derivative x is used to form the input signal of the regulator 32. At high inertia (high flow rate of air) it is necessary when moving to

P010ZhONIYU equilibrium (the signs of the signals x and x are opposed to) can stop the control of TiK as soon as possible) the entire return can go into the finished pellets. This is achieved by increasing the coefficient

gain derivative of amplifier 21.

The signal of the progam after the amplifier 21 is fed to the input of the limiter 30, the output signal of which is equal to

B

P) x at Ix I A; x -, ft A at x A;

{. / A at x - A,

de / 1 - transfer coefficient of the limiter 30.

The received signal x is multiplied in block

29 multiplying by a signal proportional to the signal of the control error module obtained in module allocation module 28, and generating at the output of multiplying unit 29 a signal Z which is equal to

Z- / J

x | x |

xx Ixl;

Prix -A Z Ixl.

The received signal Z and the error signal x from the output of the comparator unit 26 are summed at the adder 31, the output of which is equal to

y x + z.

Thus, when the system moves from an equilibrium position with a speed exceeding the AI I limit,

Y-X- / FOR | xl:

H

y х + -Ь A Ixl А

x + 1x1 2x

and a double error signal is applied to the input of the controller 32. When the system moves to an equilibrium position with a speed greater than the limitation level A

Y-X- / FOR Ixl; / H:

y x - d A x I

 x - 1x1,

and the input of the regulator 32 is not signal. Logic block 19 determines the signs of the derived flow rates of the finished pellets and return, and when the characters match, they form a signal at the first input of the switch 22, which connects the output of the regulator 32 to the input of the setpoint 14 of the ratio of concentrate and baseline consumption At various signs of the derivatives, they form a signal at the input of the switch 22, which provides the connection of the output of the controller 32 to the dispenser 1 of the concentrate.

Claims (1)

DETAILED DESCRIPTION OF THE INVENTION A pelletizing control system for iron ore feedstock containing silos, metering devices, and component consumption sensors. - mixer, pelletizer, screening, flow sensors of finished pellets and return, regulator of finished pellets, adjusters of the ratio, respectively, known to-concentrate 5 and the concentrate is the binding additive of the ratio controller of these components, the inputs of the lime ratio controller — the concentrate are connected to the outputs of the limestone and concentrate flow sensors, as well as the ratio controller of these components, and the concentrate ratio regulator inputs — the additive connected, respectively, to the outputs of the flow sensors and the setpoint adjuster 15 of these components, the output of limestone ratio regulators — the concentrate and the concentrate — binder additive are connected to the inlet of the limestone dispenser and binder additive dispenser, respectively, about 20 and 20 so that, in order to improve the accuracy of controlling the flow rate of the prepared pellets As well as improving their quality and increasing the yield, it is equipped with a differentiator, a switch, a logic block, a functional converter, an amplifier and a nonlinear block, and the output of the return flow sensor is connected to the diff input rentsiatora and input functional preobrazovate30 x. the output of which is connected to the first input of the amplifier, the output of the differentiator is connected to the first input of the logic unit, the second input of the logic unit and the amplifier is connected to the first output of the non-linear unit, the output of the logic unit and the second output of the nonlinear unit are connected respectively to the first and second inputs of the switch, the first and second outputs of which are connected respectively 40 with the inlet of the setter ratio of the concentrate - binding agent and the inlet of the concentrate feeder, the output of the amplifier and the sensor of the finished pellets are connected respectively to the first and second inputs of the nonlinear 45 block.