SU1509416A2 - Method of automatic control of charge sintering - Google Patents

Abstract

This invention relates to the sintering of ferrous and non-ferrous metal ores by agglomeration. The purpose of the invention is to improve the quality of regulation and productivity of the sintering machine by adjusting the moisture content of the charge according to the ratio of the dust content values measured in the first and last vacuum chambers simultaneously with the change in the speed of the sintering belt. 1 il.

Description

The invention relates to the sintering of ferrous and non-ferrous metal ores by agglomeration and is an improvement of the method described in the author. No. 534304.

The aim of the invention is to improve the quality of regulation and the productivity of the sinter machine.

The essence of the method is as follows.

The maximum amount of dust released during sintering of sinter is in the first and last vacuum chambers, which is explained by the presence of small fractions in the charge and an increase in gas permeability at the end of the sintering process. Under normal operation, the sintering process ends above the last vacuum chamber, and the ratio of the dust content in the exhaust gases of the first and last vacuum chambers for different compositions of the mixture varies in the range 1: 1.2-1: 2.0 . When the moisture content of the charge decreases, this ratio increases, due to

What is necessary to reduce the speed of the sintering tape, i.e. reduce sinter machine performance. Under these conditions, in order to restore the speed of the sintering machine, it is necessary to increase the humidity of the sintering stock.

For this purpose, in the known method of automatic control of the sintering process, the charge is carried out by cor. The moisture content of the charge according to the actual ratio of the dust content in the first and last vacuum chambers simultaneously with the change in the sintering belt speed.

The drawing shows a block diagram

devices for implementing the proposed method.

The circuit contains dust amount sensors 1, vacuum chambers 2, sinter machine 3, comparison unit 4, task unit 5, sintering belt speed controller 6, actuator 7, sinter drive B, adder 9, water consumption stabilization system 10, pellet 11. .

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The outputs of the dust quantity sensors 1 are connected to the corresponding inputs of the comparison unit 4, the output of which is connected to the input of the sintering belt speed regulator 6 and to the input of the adder 9. The output of the task block 5 is connected to one of the inputs of the comparison block 4, and the output of the sintering tape speed regulator 6 with in-stroke of the actuator 7, the output of which in turn is connected to the input of the drive 8 of the sintering machine.

The device works as follows.

Sensors 1 installed in the first and last vacuum chambers 2 of the sintering machine 3, send to the comparison unit 4 signals proportional to the dust content in the exhaust gases. In block 5 of the task, the ratio of these signals is set within 1: 1.2-1 -1: 2.0. In block 4, the comparison compares the ratio of signals from sensors 1 ,. with a given. From the output of the comparator unit 4, a signal is fed to the inputs of the regulator 6 and one of the inputs of the adder 9. The regulator 6 uses the actuator 7 to change the speed of the actuator 8. To the second input, a signal is sent to the second input 9 proportional to the water flow required for the pelletizing mixture . In case of equality of the signals of the ratio of the block 5 of the task and the sensors 1, the input of the adder 9 serves as a setter for the system 10 for stabilizing the water flow to the pelletizer 11.

The deterioration of the physico-chemical properties of the mixture leads to an increase in the amount of dust in the first vacuca -ka-; measure 2, which gives rise to an imbalance in block 4 comparison, connect-. with the input of the regulator 6 of the speed of movement of the sintering machine belt 3, and with an increase in the ratio the speed of the sintering machine decreases and vice versa. The occurrence of imbalance in the unit, 4 comparisons causes changes in the task in the system 10 for stabilizing the flow.

water, and with an increase in the ratio of water consumption increases and vice versa ..

The proposed method will allow a much greater improvement in the quality of regulation than the known method, due to the fact that the correction of water for pelletizing allows

to ensure the required permeability of the I charge, to increase the sintering rate

and, consequently, reduce the speed of the sinter machine, which can be stabilized at its maximum value.

Claims (1)

Invention Formula The method of automatic regulation of the process of sintering the mixture by author. St. No. 534504, characterized in that, in order to increase the quality of regulation and increase the productivity of the sinter machine; adjust the moisture content of the charge according to the ratio of the dust content measured in the first and last vacuum chambers simultaneously with the change in the speed of the sintering belt, and when the ratio changes in the direction of increase for every 5% moisture of the charge increase 0.1-0.3% absolute while simultaneously reducing the speed of the sinter machine by 5-10% and vice versa.