An investigation into aspects of liquid phase reduction of manganese and silica containing slag

In this study, the reduction behaviours of MnO and SiO2 containing slags by solid carbonaceous materials was investigated in both small and larger-scale laboratory experiments. Five types of carbonaceous material were investigated: 2 graphites, industrial coke, anthracite and eucalyptus charcoal. The effects of the reductant type/properties on the reduction kinetics, metal composition and metal yield, have been quantified. Results show that the reduction rate is highly dependant on the type of carbon used. It was found that the reductant type significantly influenced the SiO2 reduction while it did not seem to have a large effect on the MnO reduction. This may be due to the different CO2 and SiO reactivities of the materials.