Modelling the Slag-Gas-Metal Foam in the BOF-Recent Insights
Oxidation of impurity solutes during basic oxygen steelmaking is governed largely by the slag-gas-metal foam in the BOF.Several workers in past few decades have investigated the generation mechanism,rate,size distribution and residence time of metal droplets in the slag-metal emulsion.This has indeed added to the current state of knowledge of the overall reaction kinetics.However,the quantitative relation of droplet generation with mechanism and rate of decarburisation is not yet understood fully.The present work aims at developing a mathematical model for predicting decarburisation of the liquid metal,part of which exists in the slag-metal-gas foam.Oxidation reactions have been assumed to be take place at the interface between the slag and the metal phases in the emulsion.The mass transfer of FeO and carbon,in the slag and metal droplets respectively,are assumed to be the ratecontrolling steps.Oxygen available from FeO at the slag-metal interface is partitioned among carbon and other oxidisable solutes such that the Gibbs Free Energy for the entire process is minimised.The mean residence time of metal droplets in the emulsion has been estimated as a function of droplet size and decarburisation rates.
basic oxygen steelmaking slag foam decarburisation
Snigdha GHOSH N. B. BALLAL Somnath BASU
Indian Institute of Technology Bombay,Mumbai-40076,India
国际会议
the 6th International Congress on the Science and Technology of Steelmaking,ICS2015(第六届国际炼钢科技大会)
北京
英文
116-119
2015-05-12（万方平台首次上网日期，不代表论文的发表时间）