Bottom design optimisation of electric arc furnace for ferromanganese production using nodal wear model

Abstract

This paper presents the optimisation on the design of the lining of an electric arc furnace that produces refined ferromanganese by applying the nodal wear model. This model is a new tool that systematises the wear/corrosion analysis applied to industrial furnaces linking the basic theoretical knowledge of the physical chemistry of wear/corrosion phenomena and the industrial conditions. The use of this tool to optimise the process helped increase the number of tappings between furnace bottom rebuilds from 19 in 1999 to 1200 in 2005 and the productivity to increase from 1?2 to 2?7 ton h 21 .

Modelling of ferroalloy production processes in the SAF and converter

“…Verdeja et al (2003) have made a quantitative prediction for the wear processes of the lining of EAF for LCFeMn refining by applying the mathematical formulation of the Nodal Wear Model (NWM) and the corrosion mechanism of two different kinds of lining have been investigated. Parra et al (2009) have optimised the design of lining of the EAF by using the nodal wear model. The corrosion was analysed by combining the theoretical knowledge and the industrial situation hence the accuracy is quite high.…”

Results of the Application of the Mdn in the Improvement of the Design of an Electrical Furnace that produces Low Carbon Ferromanganese

“…It is possible to state therefore that the furnace used for the manufacture of refined ferroalloy that was used until the year 2000, can be defined according to the previously mentioned criteria, such as model M (18; 5.0; 14-19). 1,3) In this model, the global heat transport coefficient from point 43 to point 14 of : is the maxima concentration of silicon in mass% (equilibrium concentration) in ferromanganese to the temperature of the node "i". The value of the maximum concentration of silicon concentration is tied to the following thermodynamic balance 4,6) :…”