BEGIN:VCALENDAR
VERSION:2.0
METHOD:PUBLISH
BEGIN:VEVENT
ORGANIZER;CN=ESTAD 2023:mailto:info@metec-estad.com
LOCATION:Room 17a
SUMMARY:Thermodynamic analysis of physical and chemical processes in the high-temperature reaction zone of a liquid steelmaking bath
DESCRIPTION:The work is devoted to the analysis of physical and chemical processes in the high-temperature reaction zone (HTRZ), which is formed in steelmaking processes with oxygen blowing, such as converter production. Detailed thermodynamic analysis of HTRZ has been conducted, and parameters of liquid steel bath HTRZ have been determined: temperature, masses and chemical composition of metal, slag and gas phases. It is concluded that the carbon contained in the metal of HTRZ behaves as a catalyst for the transition of the iron into the gas phase and, accordingly, the irrevocable loss of iron in the steelmaking process. The results of the study allowed to build previously unknown fragments of equilibrium phase diagrams of the high-temperature region of systems "iron-oxygen" and «iron-oxygen-carbon». Another aspect of this study is removal of impurities from HTRZ. It is important process in which chemical elements are irretrievably removed from the space of the steelmaking unit. According to the temperature and the degree of removal into the gas phase, studied impurities can be divided into three groups: a) carbon, which is almost completely removed at a relatively low total oxygen content in the HTRZ and temperatures up to 2000°C; b) silicon, calcium, magnesium and phosphorus, which are almost completely removed into the gas phase in the temperature range of 2100...2800°C; c) manganese, sulfur, iron and aluminum, which are partially removed at temperatures above 2600°C. With an increase in the total oxygen content in the HTRZ above 15%, temperature increase sharply slows down, reaching limit of 2900°C at a total oxygen content of 20%. In this case, iron intensively escapes into the gas phase along with impurities. Therefore, blowing the steelmaking bath with oxygen at a very high rate is inappropriate, since it does not lead to a significant increase in the productivity of steelmaking unit. 
CLASS:PUBLIC
DTSTART:20230614T104000
DTEND:20230614T110000
END:VEVENT
END:VCALENDAR