SU531850A1 - The method of controlling the temperature regime of converter melting - Google Patents

Description

one

The invention relates to ferrous metallurgy, in particular to the management of a converter process.

Known by way of control of the temperature mode of the converter melting consists in measuring the various components of the heat balance of the converter bath and correcting these components to produce steel 1B at the end of the dead-end at a given temperature.

The disadvantage of this method is the large variation in steel temperature, with low accuracy in measuring the components of the heat balance.

The closest to the described invention, the technical essence and the achieved result is an apocontrol method for converter melting, in which the composition of the exhaust gases and the thermal load on the water-cooled elements are measured and, according to this information, the control mode is measured.

A disadvantage of the known method is low control accuracy, since many processes (for example, dissociation of moisture) substantially appear on the heat balance of the converter bath and do not affect the heat Haippy3iKy of the water-cooled elements.

The purpose of the invention is to control the temperature regime of converter melting with more

2

high precision. This is achieved by additionally measuring the blast temperature at the inlet of the purge mold and correcting the temperature condition using the measurement results. Moreover, as the temperature rises, the amount of cooling materials decreases or the tuyere nozzle distance increases to the level of the calm metal while simultaneously increasing the flow rate.

FIG. 1 shows the dependence of the temperature increment of the bath on the temperature of the blow; in fig. 2 is a block diagram of an apparatus for implementing the proposed method, where the 1-unit temperature control is blowing; 2 - control device; control of heat load on water-cooled elements; 4 - unit for controlling the composition of exhaust gases; 5- temperature meter blowing; 6 - flue; 7 - heat meter for water-cooled elements; 8 - selection device

 9 - drive tuyere; 10 - valve; eleven -

lance; 12 - converter; 13 - weight bunker;

14 - hopper drive.

The essence of the method is to measure the composition of the exhaust gases and the heat load on the water-cooled elements, calculate the blowing mode, then measure the temperature to blow at the inlet of the blowing tuyere and adjust the temperature setting

and with increasing tempoatura blowing

reduce the amount of cooling materials. or increase the distance of the lance of the tuyere to the level of a quiet metal with a simultaneous increase in the oxygen consumption. The amount of water levs depends on the temperature of the blow, and the amount of water in the bath is converted. The water vapor in the bath is dissociated, taking a significant amount of heat from the bath, which is then released to the waste gases.

To implement the described method, the composition of the exhaust gases in the flue 6 of converter 12 is removed by a sampling device 8 and a block 4 controlling the composition of the exhaust gases, a heat load on the water-cooled elements measuring 7 and block 3, and the temperature to blow with meter 5 and block 1. This the information enters the control device 2, which determines the control actions and changes the help of the driver 14 of the weighing bin 13, the number of cooling materials or the distance of the nozzle of the tuyere 11 to the level of the calm metal by means of the Drive 9 simultaneous increase .koda races valve 10 BV.

Ylpn using the proposed method of etching (converter smelting is performed with higher accuracy, as a result of which the quantity of heats drawn from the first stage is increased, and the consumption of refractories for smelting is reduced.

Claims (1)

Invention Formula The method of controlling the temperature regime of converter melting by changing the blast mode and the mode of introducing cooling and slag-forming materials, depending on the composition of the exhaust gases and the thermal load "and water-cooled elements, with the aim of increasing control accuracy, the temperature at the inlet of the blowing lance is measured additionally and the temperature is adjusted according to the measurement results, and the temperature is blown up or the amount of cooling materials is increased, or They increase the distance of the nozzle of the tuyere to the level of a quiet metal with a simultaneous increase in the flow rate to blow.