The work presented aims to reduce the amount and viscosity of the slag produced in the furnace during the production of Compacted Graphite Iron in SCANIA foundry and simulate the actual process using thermodynamic calculations to estimate the amount and the composition of the slag.

The estimation of slag amount and slag compositions was done using CALPHAD (Calculation of Phase Diagram) method which can be done using the thermodynamic software Thermo-Calc using the composition of the raw materials and the phase diagrams calculation. In the present work, an appropriate calculation method to estimate the amount and composition of slag was established and based on the calculations, strategies to decrease the viscosity were suggested.