RU1822435C - Agglomeration process control method - Google Patents

Abstract

The essence of the invention: maintain the content of CO2 in the exhaust gases in the last vacuum chamber of the sintering zone at a predetermined level, determine the temperature of the exhaust gases in the last, for example, four, vacuum chambers, determine the maximum temperature difference in adjacent vacuum chambers, as well as the deviation This difference from the set value, depending on the deviation obtained, changes the fuel consumption dosed into the charge.

Description

The invention relates to the preparation of hands for melting and is intended to control the thermal level and completeness of the sintering process of the sinter mixture.

The aim of the technical solution is to improve the quality of the sinter by stabilizing the thermal level of the sintering process.

This goal is achieved in that the CO2 content in the exhaust gases in the last vacuum chamber of the sintering zone is maintained at a predetermined level, and the fuel consumption in the charge is changed depending on the maximum gas temperature difference in neighboring vacuum chambers of the tail part of the sinter machine, for example, four. the last vacuum chambers, and with its increase, fuel consumption is reduced and vice versa.

The essence of the method is as follows.

In accordance with known technical solutions, the content of C0Ј in the exhaust gases in the last vacuum chamber of the sintering zone is maintained at a predetermined level, which provides the required degree of sintering of the charge. The difference between the method is that the temperature of the gases is measured in the last vacuum chambers of the sintering machine and the no-maximum temperature difference in the neighboring vacuum chambers, the thermal level of the sintering process is evaluated. Indeed, while ensuring the required (predetermined) degree of caking according to an indicator not related to the temperature of the gases, the temperature of the gases reflects only the thermal level of the process. The deviation of the maximum temperature difference in neighboring vacuum chambers from the set value changes the flow rate of fuel dosed J into yacht. Detailed analysis of maximum

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the temperature differences in the neighboring vacuum gauges of the indicator of the thermal level of the sintering process are given in the appendix.

An automatic control system implementing the method structurally consists of two control loops. The primary circuit includes a gas analyzer, a sensor for the content of С04 in the exhaust gases, a regulator of the degree of addition, and a control device associated with the electric drive of the atoll. The second circuit consists of temperature meters installed in the k-x last vacuum chambers, an analyzer and a sensor for the maximum temperature difference in neighboring vacuum chambers, a regulator of the thermal level of the process, and a fuel dispenser. The second circuit is connected to the first by means of a logic device that monitors the deviation of the CO2 content in gases from the set value.

The operation of the system is as follows. When the degree of charge addition (completeness of the process) deviates from the desired one, a mismatch occurs between the output signal of the signaling device that controls the content of the sintering zone in the last vacuum chamber and the signals of the CO2 content controller. The output signal of the controller through the control device acts on the electric drive sinter. As a result, the speed of the sintering belt changes and is set so that the CO2 content in the exhaust gases becomes equal to a predetermined value.

In periods when the baking is equal to the specified temperature, the temperature of each of the last 10 vacuum chambers is controlled by a logic device command, the corresponding signals are sent to the analyzer, the temperature differences in neighboring vacuum chambers are calculated, and the maximum of them is determined. The maximum difference is compared with a given value.

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value entered into the analyzer from the sensor of the maximum temperature difference. The deviation is fed to the input of the thermal controller, the output signal of which is supplied as a control signal to the additional fuel dispenser. In this case, the fuel content in the charge is changed and set so that the maximum temperature difference of the exhaust gases in adjacent accumulators becomes equal to a predetermined one.

Thus, the control system stabilizes the degree of sintering of the charge and the thermal level of the sintering process. The hardware system can be implemented on the basis of local monitoring and control facilities; and with the use of computer technology.

As a basic sample, a method for controlling and completing the sintering process can be adopted, which consists in monitoring and automatically stabilizing the CO2 content in the last sinter zone sinter chamber by changing the speed of the sinter machine. The method is implemented at the smelter of the Kommunarsk Metallurgical Plant.

 The effectiveness of the method consists in improving the quality of the agglomerate by reducing the fines content in it by 1.5-2.0%.

Claims (1)

The claims A method for controlling the agglomeration process, comprising maintaining the CO2 content in the exhaust gases in the last vacuum chamber of the sintering zone at a predetermined level, determining the temperature of the exhaust gases, characterized in that the temperature of the exhaust gases is determined in the last, for example, four, vacuum chambers. the maximum temperature difference in the neighboring vacuum chambers is determined, as well as the deviation of this difference from the set value, depending on the deviation obtained, the fuel consumption dosed into the charge is changed.