Energy optimizing furnace (EOF) is a primary steel making reactor, where the autogenous exothermic reaction heat, associated with the solute oxidation is utilized for making the steel. The thermo-kinetic reactions of the steel making process have been evaluated in the world's largest, 65 ton EOF, at JSW Steel Ltd., Salem. The solute oxidation as a function of blow time and Si content was evaluated. The mass balance analysis showed that oxygen from the furnace atmosphere has to be entrained by the oxygen jet from the inclined supersonic lance, to completely oxidize the solutes in the melt. The heat balance showed that the power of 352 kWh per metric ton of hot metal is generated by the solute oxidation along with the post combustion. The characteristics of the inclined single hole-supersonic oxygen jet on the molten bath are brought out. Other operational aspects of the process are elaborated.

This study examines the problem of unsteady MHD mixed convective flow past a vertical porous plate in presence of radiation. The coupled non linear partial differential equations are solved numerically by a finite element method. The effects of the material parameters on the velocity, temperature and concentration fields are shown graphically.

An analysis is made for the unsteady magnetohydrodynamic (MHD) free convection flow of a viscous, incompressible, electrically conducting fluid past a semi infinite vertical porous moving plate taking in to account the mass transfer with variable viscosity and thermal conductivity. An implicit finite difference method is used to solve the unsteady, non linear and coupled governing equations. A parametric study illustrating the influence of different flow parameters on velocity, temperature and concentration are investigated. Numerical results are presented for various parameters.

This paper has been withdrawn.

In this analysis, the effects of radiation have been discussed on unsteady MHD free convection heat and mass transfer flow on a viscous, incompressible, electrically conducting fluid past a vertical permeable moving plate with radiation. The non-linear partial differential equations governing the flow have been solved numerically using finite element method. Graphical results for velocity, temperature and concentration profiles have been obtained, to show the effects of different parameters entering in the problem. Such flow problems are important in many processes, in which there is combined heat and mass transfer with radiation. It has been observed that the velocity increase with the increase in the radiation parameter and there is a increase in temperature with the increase in the value of radiation parameter.