Slag formation during the steel refining process in a ladle furnace combined with the vacuum treatment
The process of slag formation and the change of its chemical composition during the steel refining process is determined by the composition of the slag-forming materials used, the efficiency of the furnace slag cutoff and the kinetics of reactions on the metal - slag interface. It is possible to consider all these factors in theoretical reasoning by using the so-called hybrid model for calculations. A concept for modelling the changes in the chemical composition of metal and slag has been elaborated. The tank theory combined with the thermodynamic model of reactions on the metal bath-slag and metal bath-gas phase interfaces were used to develop a hybrid model of the process. The tank theory was used to describe the stirring of the metal bath, and this made it possible to simulate the process in real time. Some theoretical basis and the verification of the model were presented, inter alia, during the last, IX International Conference on Molten Slags in Santiago.This paper presents a continuation of previous work, additionally including refining processes in a vacuum. Special attention is paid to the reactions on interfaces between metal and slag as well as those between metal and the gas phase. In the hybrid model these reactions are simulated using thermodynamic calculations, taking into account the kinetics of the aforementioned reactions. The processes kinetics can be determined by the mixing model based on the tank theory. Another important improvement of the hybrid model is the extension of the chemical composition of both metal bath and slag being considered in computations. It enables using the suggested model to simulate the alloy steel refining process. The summary presents the verification based on industrial melts. The verification was conducted for a technological line consisting of a 40-ton ladle furnace working in parallel with a vacuum chamber. The typically stored industrial database was complemented with additional measurements necessary to conduct the verification.
Process Control Hybrid Model Steel Refining Slag
Jan FALKUS Katarzyna MI(L)KOWSKA-PISZCZEK Lechos(l)aw TR(E)BACZ Pawe(l) DRO(Z)(D)(Z) Tomasz KARGUL Jacob LAMUT Alojz ROZMAN
AGH University of Science and Technology, Faculty of Metals Engineering and Industrial Computer Scie Ljubljana University, Ljubljana, Slovenia Metal Ravne, ,Koro(s)ka cesta 14, 2390 Ravne na Koro(s)kem, Slovenia
国际会议
Ninth International Conference on Molten Slags,Fluxes and Salts(第九届国际熔渣、溶剂与熔盐学术会议 MOLTEN12)
北京
英文
1-10
2012-05-27（万方平台首次上网日期，不代表论文的发表时间）