Authors : L. Snani , M.L. Fares , A. Mebarek and S. Saad
Abstract: The converter is a reactor which can eliminate to a very low rate oxydable elements from the cast iron (C, Mn�). However, in spite of great progress having allowed a better approach of physical and chemical balances, the results obtained remain inefficient. The quality from the chemical point of view of the cast iron is one of the main causes of this dispersion. It is currently the case of oxygen steel-works of Arcelor-Mittal-Annaba-Algeria, which have enormous difficulties in producing tinplate from a cast iron very rich in Manganese, around 2.36%. In fact 42% of the fusions elaborated with oxygen steel-works their concentration in Manganese at the end of the blowing is higher than that of the concerned steel and thus, have to be subjected to an additional blowing. This operation involves an increase in production cycle (approximately 7 mn) leading to a significant loss of production. The conditions of oxidation of carbon, the temperature of the bath, the alkalinity of the slag and particularly the initial content of Manganese in the cast iron, have a direct influence on the residual Manganese content in steel. In order to improve the working conditions of the steel-works, it is proposed in this work to carry out partial demanganization of the cast iron outside the reactor using the process of the gas-lift. In the first step of this study, a gas-lift experimental set up is designed containing air compression machine, a column to rise of the Gas-liquid mixture and various control devices as well as a complete procedure of experimentation is developed. This experimental set up has made possible the simulation at the laboratory the conditions of the cast iron treatment. The analysis of the obtained results have allowed the establishment hus of the relation: liquid flow and gas-flow. Finally, the design characteristics of the industrial plant were fixed and a calculation model is established in order to determine the procedure which allows easy and fast extension of the model for each cast iron chemical composition.
L. Snani , M.L. Fares , A. Mebarek and S. Saad , 2007. Simulation for Obtaining Mild Steels from a Cast Iron Rich in Manganese . Asian Journal of Information Technology, 6: 1196-1199.