SU1252368A1 - Method of automatic control for process of clodding and device for effecting same - Google Patents

Abstract

I. A method for automatic control of the pelletizing process, which includes measuring and stabilizing the charge of the charge into the pelletizer, measuring the mass of raw pellets and returning fines, characterized in that, in order to improve the performance of a comrade and the quality of the pelletizing process, iron ore pellets are additionally affected by using the electromagnetic field on the material in the pelletizer, the number of suitable raw materials is determined, as is the weight of the raw pellets and the age of fines and the corrected consumption of mifXThi B By maintaining the maximum amount of suitable pellets, the ratio of the mass of fines return to the mass of raw pellets is determined and, according to this value, the current electromagnetic field of the traveling electromagnetic field is changed, keeping the ratio minimal. with S (L

Description

one

2, A device for automatic control of a pelletizing process, comprising a serially connected pelletizer, a first conveyor, a rumble, a second conveyor, a mixer, and a feeder containing the first and second weighing gauges installed on the first and second conveyors 1us; the pelletizer, 1 installed on the feeder, an adder, a material consumption regulator into the pelletizer, a mop converter (electric drive of the feeder, as well as a material consumption sensor into the pelletizer, connected to the second inlet is summed up by the OL, which is characterized by the fact that, in order to increase the productivity of the pelletizer and the quality

one

The invention relates to the anthropic control of the work of the fine granule iron ore materna. and can be used in the agglomeration of ores in ferrous metallurgy enterprises.

The aim of the invention is to improve the production of the pelletizer and the quality of the pelletizing process of iron ore pellets by controlling the path of movement of the crumpled material.

In (Fig. 1, a device for implementing the proposed method is presented; in Fig. 1.2 — the change in the trajectories of the material under the action of a traveling electromagnetic field; FIG. 3; the dependence of the performance of the pellet on suitable pellets on the rotation speed of the pellet; on Fig. 4 is a block diagram of a control unit of an electromagnetic system;

The device contains a pelletizer, into which the charge is supplied by a feed-Tej7f M 2 driven by an electric actuator 3, the device also consists of 11 tons of material consumption sensor 4

the process of iron ore complex okrapy by controlling the path of movement of the material, it is equipped with a running electromagnetic field, a subtraction unit, two extreme regulators, a correction unit, a division unit, a running electromagnetic field installation control unit, the first and second weighing elements connected to the inputs of the division unit and the subtraction unit. The output of which through the first extreme regulator and the correction unit is connected to the setting unit of the material consumption in the pelletized Spruce, the output of the dividing unit through the second extreme controller and the control unit is connected to the installation of a traveling electromagnetic field.

into the pelletizer 1, installed on the feeder 2, of the material flow controller 5 into the pelletizer 1, the output of which is connected to the electric drive 3 via the power converter 6, and the input is connected to the output of the first adder 7, the first and second inputs of which are connected to the material consumption sensor 4 and a setting device 8 for the consumption of material in the pelletizer of the first weight measuring element 9 mounted on the conveyor 10, the second weight measuring element 11 mounted on the second conveyor 12, the subtraction unit 13. The first and second inputs of block 13 are connected to the output of the weight measuring elements 9 and 11, and the output is connected to the input of the first extreme regulator 14, Exit

the latter is connected to the input of the correction unit 15, the output of which is connected to the setting device 8, the device also contains a dividing unit 16, the first and second inputs of which are connected to the weighing elements I and 9, the output to the input of the second extremal regulator 17, the output of which is connected to the input a control unit 18 of the electromagnetic system 19, including a current source 20 associated with

.

the first input of the switch 21, the second input of which is connected to the output of the multivibrator 22, and the output connected to the windings of the electromagnetic system 1 9.

The breakdown of the felts into suitable ones and the return takes place at roar 23. The detrimental pellets are returned to the mixer 24.

The average diameter and quality of the pellets depend on the rotation speed i of the pelletizer (Fig. 3). However, with an increase in speed above the critical movement of matter, the hectare in the pelletizer turns into a waterfall and then into cyclic modes, which leads to a sharp decrease in the average diameter and quality of the material: it is followed; 1 because most of the material is pressed against the pelletizer. In order to control the trajectory of the material in the pelletizer, in the third quadrant A (Fig. 2), an installation 19 of a traveling electromagnetic field (circular with a radius field smaller than the radius R of the R field R of the trowel) is placed, consisting of a magnetic conductor and windings allows embryos of lumps formed in the process of moving along the arc BV, to give an additional moment of the amount of movement, directed along the garnish. In addition, lumps get a rotational movement around its axis. This contributes to an increase in the probability of their collision with particles of the crumpled charge, and to an increase in the strength of the lumps due to the increase; The number of collisions. When exposed to electromagnetic radiation, the movement of the charge from the waterfall goes into the reversal mode, which is most favorable from the point of formation of pelletizing.

A device for implementing the method works as follows.

The amount of charge supplied to the ambient freezer is controlled by varying the speed of the drive 3 of the feeder 2 according to

the signal of the flow regulator 5 - conditional air and a decrease

la depending on the mismatch

consumption of electricity.

 ABOUT

 5 20 25

40

five

between the set value of the material set by the setting device 8, and the value of the sensor D of material flow. When the chemical and mineralogical properties of ichths change, the quality of the pelletizing process changes, i.e. the number of suitable raw skatytey. The signals from the weighing elements 9 and I1 are fed to subtraction unit 13, where the number of usable raw pellets Q is determined as the difference between the weight of raw pellets Qp and the return of fines Q

0- Qo - Qf ..

The extreme controller 14 by means of the correction unit 15 corrects the task for the consumption of material so that the number of suitable raw pellets Q is maximum. The signals from the weighing elements 11 and 9 come to the division unit, where the ratio of the mass of the return of fines to the mass of raw Qt, / Q is determined.

The extreme controller 17 by means of the electromagnetic system control unit 18 changes the intensity of the electromagnetic field in such a way that the value of Qj, / Q is minimum. The change in the voltage of the electromotive field is carried out by changing the current of the adjustable source 20, and the switching frequency of the windings of the runaway electromagnetic field is determined by the multivibrator 22.

Thus, when the chemical and mineralogical properties of the charge change, the device maintains the maximum performance of the pelletizer at suitable rates, forming the most favorable, in terms of pelletizing, the mode of movement of the crumpled material in the pellet.

Process control pelletizing of the proposed method provides a performance improvement okomkop.pel on

consumption of electricity.

V

at

Qr

Chkr P

2.

FIG.

Editor A, Shishkin

Compiled by A. Abrosimov

Tehred L.SerdnzhovaKorrektor M. Mac gimishinets

Order D590 / 28 Circulation 567 Subscription

BHlInnit of the USSR State Committee

on affairs and discoveries and discoveries 113035, Moscow, Zh-35, Raushsk nab., d.

Polygraphic production, city of Uzh1-city, ul. Project, 4

Claims (2)

1. A method for automatically controlling the process of pelletizing, including measuring and stabilizing the charge flow into a pelletizer, measuring the mass of raw pellets and returning fines, characterized in that, in order to increase the productivity of the pelletizer and the quality of the process of pelletizing iron ore pellets, they additionally affect the traveling electromagnetic field on the material in the pelletizer, determine the amount of suitable raw pellets as the difference in the mass of raw pellets and the age of the little things and adjust the charge to the pelletizer, support By maximizing the quantity of suitable pellets, the ratio of the fines return mass to the mass of raw pellets is determined and the intensity of the traveling electromagnetic field is changed by this value, keeping the ratio minimal. Figure 1 2. A device for automatically controlling the pelletizing process, comprising a pelletizer, a first conveyor, a screen, a second conveyor, a mixer and a feeder, comprising a first and a second weighing elements installed on the first and second conveyors, connected in series to the charge flow sensor in a pelletizer installed on the feeder, adder, material flow regulator into a pelletizer, power converter, feeder electric drive, as well as a material flow regulator in a pelletizer, connected with the second input of the adder, characterized in that, in order to improve the pelletizing productivity and the quality of the pelletizing process of iron ore pellets by controlling the trajectory of the crumpled material, it is equipped with a traveling electromagnetic field, a subtraction unit, two extreme regulators, a correction unit, a division unit, a unit control the installation of a running electromagnetic field, and the first and second weighting elements are connected to the inputs of the division unit and the subtraction unit, output which through the first extreme regulator and the correction unit is connected to the adjuster of the flow rate of the material into the pelletizer, the output of the division unit through the second extreme regulator and the control unit is connected to the installation of a traveling electromagnetic field.