SiC powder can be synthesized using silicon sludge from photovoltaic silicon wafer production by heat treatment with carbon addition. It is known that the conversion of SiC from the mixture of silicon and carbon is mainly affected by the mole ratio silicon/carbon, and excess carbon is used to obtain the maximum conversion of SiC. Therefore, the removal process of residual carbon is required to obtain the SiC powder from SiC and carbon mixture. The aim of this paper is to present the results of computational fluid dynamic (CFD) modeling applied to carbon removal process for SiC conversion. The work was done using the commercial CFD code ANSYS FLUENT which was used to solve the steady state, three dimensional, fully viscous Navier Stokes equations. The effects of the mutual interactions between gaseous phase and particle were simulated by discrete phase modeling approach, while residual carbon combustion was simulated by the single kinetic rate model.