Abstract
This work presents an approach for evaluating the cumulative heat loss from liquid steel to the steelmaking ladle during each circuit of operation in the ladle cycle. The estimate is given by means of a set of qualitatively defined classes, representing a measure of the thermal state of the ladle. Taking into consideration the changes in the ladle geometry because of the wear of the ladle inside layer, the heat losses are calculated for a succession of heats in the ladle, using long term averages for the full-ladle and empty-ladle durations. In a similar manner, a calculation corresponding to the extreme situations, i.e., period lengths of empty and full ladle dominating, is carried out, giving an estimate of maximum and minimum heat losses. For each cycle number, an appraisal of the deviation from the average conditions is derived on the basis of recent virtual ladle background information by calculating a value for a correction term, and a revised heat loss is evaluated by utilizing the correction. An additional correction due to the increase of coating mass at ladle repairments may also be made. Finally, after defining the class discretization for the heat loss, a classification in linguistic terms is obtained.
Citation Formats
Sillanpaeae, M.
A qualitative model for approximating the heat loss from liquid steel to a steelmaking ladle.
Finland: N. p.,
1991.
Web.
Sillanpaeae, M.
A qualitative model for approximating the heat loss from liquid steel to a steelmaking ladle.
Finland.
Sillanpaeae, M.
1991.
"A qualitative model for approximating the heat loss from liquid steel to a steelmaking ladle."
Finland.
@misc{etde_10140388,
title = {A qualitative model for approximating the heat loss from liquid steel to a steelmaking ladle}
author = {Sillanpaeae, M}
abstractNote = {This work presents an approach for evaluating the cumulative heat loss from liquid steel to the steelmaking ladle during each circuit of operation in the ladle cycle. The estimate is given by means of a set of qualitatively defined classes, representing a measure of the thermal state of the ladle. Taking into consideration the changes in the ladle geometry because of the wear of the ladle inside layer, the heat losses are calculated for a succession of heats in the ladle, using long term averages for the full-ladle and empty-ladle durations. In a similar manner, a calculation corresponding to the extreme situations, i.e., period lengths of empty and full ladle dominating, is carried out, giving an estimate of maximum and minimum heat losses. For each cycle number, an appraisal of the deviation from the average conditions is derived on the basis of recent virtual ladle background information by calculating a value for a correction term, and a revised heat loss is evaluated by utilizing the correction. An additional correction due to the increase of coating mass at ladle repairments may also be made. Finally, after defining the class discretization for the heat loss, a classification in linguistic terms is obtained.}
place = {Finland}
year = {1991}
month = {Dec}
}
title = {A qualitative model for approximating the heat loss from liquid steel to a steelmaking ladle}
author = {Sillanpaeae, M}
abstractNote = {This work presents an approach for evaluating the cumulative heat loss from liquid steel to the steelmaking ladle during each circuit of operation in the ladle cycle. The estimate is given by means of a set of qualitatively defined classes, representing a measure of the thermal state of the ladle. Taking into consideration the changes in the ladle geometry because of the wear of the ladle inside layer, the heat losses are calculated for a succession of heats in the ladle, using long term averages for the full-ladle and empty-ladle durations. In a similar manner, a calculation corresponding to the extreme situations, i.e., period lengths of empty and full ladle dominating, is carried out, giving an estimate of maximum and minimum heat losses. For each cycle number, an appraisal of the deviation from the average conditions is derived on the basis of recent virtual ladle background information by calculating a value for a correction term, and a revised heat loss is evaluated by utilizing the correction. An additional correction due to the increase of coating mass at ladle repairments may also be made. Finally, after defining the class discretization for the heat loss, a classification in linguistic terms is obtained.}
place = {Finland}
year = {1991}
month = {Dec}
}