Factorial Design Analysis of the Metallic Yield of Silicomanganese Alloy from Rich Manganese Slag

Although the influence of many parameters on the metallic yield of reduction process of Silicomanganese alloy was intensively studied but the magnitude effect of each parameter and their mutual interactions on the metallic yield is still not clear. In the current work, a 23 factorial design was used to investigate the magnitude effect of Mn/Si ratio, charge basicity and coke ratio on the metallic yield of production silicomanganese alloy from manganese rich slag. Regression model was used to deduce a mathematical formulation to predict the effect of Mn/Si ratio (2 -3), charge basicity (1.3 – 2.5) and coke ratio (0.95 – 1.35).The results showed that charge basicity has the highest positive effect while the Mn/Si ratio has highest negative influence on the metallic yield. The interaction combination between Mn/Si ratio with coke ratio has high negative influence while the coke ratio and interaction combination between basicity and coke ratio showed relatively high positive influence on metallic yield. The interaction combination between Mn/Si ratio with basicity and /or coke ratio showed small positive effect on metallic yield. The results of the driven models were found to be in good agreement with the experimental data of reduction process of manganese rich slag. Matlab program was used in calculation and build up the regression model.