ISSN 2594-5300
53º Seminário de Aciaria, Fundição e Metalurgia de Não-Ferrosos — vol. 53, num.53 (2024)
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Abstract
THE SECONDARY STEEL REFINING PROCESS USES REFRACTORY SAND AS AN INSULATING THERMAL BARRIER THAT SEPARATES THE LIQUID METAL FROM DIRECT CONTACT WITH THE VALVE SYSTEM THAT CONTROLS STEEL LEAKAGE. THE EFFICIENT USE OF SUCH PRACTICE PROVIDES A HIGH RATE OF FREE OPENING, IMPACTING ON INCREASING THE PRODUCTIVITY AND QUALITY OF THE STEEL, REDUCING THE NUMBER OF STOPPAGES, THERMAL LOSSES AND EVEN THE REOXIDATION OF THE STEEL. MANY OPERATIONAL VARIABLES AND MATERIAL CHARACTERISTICS INFLUENCE THE FREE OPENING RATE. THE PROPERTIES OF THESE MATERIALS AND THE RELEVANT PROCESS PARAMETERS WERE EVALUATED AS A FUNCTION OF THE FREE OPENING RATE UNDER OPERATING CONDITIONS. THE PERCENTAGE OF FREE OPENING IS ALSO STRONGLY INFLUENCED BY THE TIME AND TEMPERATURE OF THE STEEL IN THE LADLE. IN VIEW OF THIS, A THERMODYNAMIC STUDY OF TWO SETS OF FILLER SANDS WAS CARRIED OUT. THE CHARACTERIZATIONS OF THE MATERIALS WERE MADE THROUGH PARTICLE SIZE ANALYSIS, X-RAY FLUORESCENCE (X-RAY), CARBON CONTENT, AND FLOWABILITY INDEX. THE FREE OPENING RATE HAS BEEN PRESENTED. IN ADDITION, THERMODYNAMIC SIMULATIONS WERE PERFORMED USING THE FACTSAGE 8.3 SOFTWARE, WHICH CALCULATED THE PERCENTAGE OF ALL PHASES PRESENT IN THE COMPOSITIONS OF CHROMITE SEALING SAND AND HIGH ZIRCON CONTENT AS A FUNCTION OF TEMPERATURE
THE SECONDARY STEEL REFINING PROCESS USES REFRACTORY SAND AS AN INSULATING THERMAL BARRIER THAT SEPARATES THE LIQUID METAL FROM DIRECT CONTACT WITH THE VALVE SYSTEM THAT CONTROLS STEEL LEAKAGE. THE EFFICIENT USE OF SUCH PRACTICE PROVIDES A HIGH RATE OF FREE OPENING, IMPACTING ON INCREASING THE PRODUCTIVITY AND QUALITY OF THE STEEL, REDUCING THE NUMBER OF STOPPAGES, THERMAL LOSSES AND EVEN THE REOXIDATION OF THE STEEL. MANY OPERATIONAL VARIABLES AND MATERIAL CHARACTERISTICS INFLUENCE THE FREE OPENING RATE. THE PROPERTIES OF THESE MATERIALS AND THE RELEVANT PROCESS PARAMETERS WERE EVALUATED AS A FUNCTION OF THE FREE OPENING RATE UNDER OPERATING CONDITIONS. THE PERCENTAGE OF FREE OPENING IS ALSO STRONGLY INFLUENCED BY THE TIME AND TEMPERATURE OF THE STEEL IN THE LADLE. IN VIEW OF THIS, A THERMODYNAMIC STUDY OF TWO SETS OF FILLER SANDS WAS CARRIED OUT. THE CHARACTERIZATIONS OF THE MATERIALS WERE MADE THROUGH PARTICLE SIZE ANALYSIS, X-RAY FLUORESCENCE (X-RAY), CARBON CONTENT, AND FLOWABILITY INDEX. THE FREE OPENING RATE HAS BEEN PRESENTED. IN ADDITION, THERMODYNAMIC SIMULATIONS WERE PERFORMED USING THE FACTSAGE 8.3 SOFTWARE, WHICH CALCULATED THE PERCENTAGE OF ALL PHASES PRESENT IN THE COMPOSITIONS OF CHROMITE SEALING SAND AND HIGH ZIRCON CONTENT AS A FUNCTION OF TEMPERATURE
Keywords
Filler sand; Free opening rate; Thermodynamic study
Filler sand; Free opening rate; Thermodynamic study
How to refer
MATOS, LETÍCIA DE;
BIELEFELDT, WAGNER VIANA;
BRAGANÇA, SAULO ROCA.
ANALYSIS OF THE TECHNICAL AND THERMODYNAMIC PROPERTIES OF STEEL LADLE SLIDE GATE VALVE FILLER SANDS
,
p. 1008-1015.
In: 53º Seminário de Aciaria, Fundição e Metalurgia de Não-Ferrosos,
São Paulo, Brasil,
2024.
ISSN: 2594-5300
, DOI 10.5151/2594-5300-41705
