Bogushevsky V.S

Control Oxygen-Converter Process in Closed Loop

The work was done in order to increase the efficiency of BOF smelting by constructing closed-loop control system. The creation of BOF melt models was based on the combined modeling method, which includes deterministic, probabilistic and heuristic approaches, methods of automatic classification and the positive experience of the previous administration. A closed-loop system including a static, dynamic and closed control model BOF steelmaking process was developed.

Model of Bof Lapping with Setted Temperature and Carbon Content

In order to increase the accuracy of process control refinement converter smelting, a series of mathematical models of controlling were developed. Melting model was created to calculate the charge (“static control”), control fuse in the process of purging (“dynamic management”) and finishing melting after the measurement of carbon content and temperature of the bath without interrupting the purge and calculation of reductants. The influence of control actions on the process of finishing converter smelting was studied.

Investigation of the Economic Efficiency of Automation Bof Production

The influence of technological and human factors on the cost of steel, the improvement of the process and the organization of production were investigated. Technological factors include the basicity of slag, lining life, rate of oxygen input, changes in nitrogen content in the metal, clean of blowing, conditions of slag formation. Statistical relationship between the lining life and the basicity of slag was obtained.

Control of Bath Dynamics along Purging as Part of the Control System Converter Melting

The purpose of research is to lay the theoretical foundation and specify the control model of bath dynamics along the blowdown. The research is conducted on converters of 160 tons. Specifically, we study the control dynamics of decarbonization and changes of bath temperature. We use deterministic and statistical methods to process the research results.

Predicting Temperature Regime of Melting Furnace Bath

Based on the system approach of the phenomena of heat transfer in a furnace, we obtain relations of kinetics of transition change rate of bath temperature field from the load in the solid metal charge. We uncover the general form of the power expression of the wave process in the bath without integrating differential equations using the experimental data, the ratio of similarity theory, as well as physical modeling. In addition, we obtain criterion equations of heat transfer at fully developed turbulent flow for the internal problem.

Controlling the Converter Melting by Energy-Saving Technology

Based on the theoretical justification of carbon oxidization and the analyses of progressing processes of heat generation, we develop the model of temperature condition of the converter frame bath. We analyze the existing methods of controlling the converter process by the energy-saving technology. We also study the influence of the distance lance to the level of quiet metal bath on thermal characteristics. We analyze control methods of the energy-saving technology for the blowing converter by single- and two-circuit lances.

The mode control of converter melting blowing out

The present paper studies the blowing parameters in the process of converter melting blowing out – the intensity of oxygen supply and the distance of water-cooled lance’s tip to the level of bath. Through experiments conducted, we obtain the dependence of the distance change of the watercooled lance’s tip to the level of quiet bath in the course of the converter’s operating period. Moreover, we determine the feedback parameters at intensity control of oxygen supply. Finally, we introduce the results of the obtained dependences in the algorithms of control and converter process control.

Control of the Temperature Mode of BOF Process

We analyze the existing methods of the bath temperature control. We study direct and indirect methods of controlling the temperature in the course of purging. We define the dependence between the output parameters of converter melting and the bath temperature. Finally, we elucidate the results obtained by implementing the dependencies in the algorithms of control of the BOF process

A dynamic model of temperature control converter baths

In this paper, we analyze the existing methods of temperature control of the oxygen - converter bath. We investigate the balance method of temperature control, kinetics of burning iron impurities, assimilation of bulk materials, heating of the lining and its relation to changes in the bath temperature. Finally, we present the simulation results of converter melting under the temperature conditions.