## Mass Balance Calculations In Vertical Roller Mills

Mass balance calculations in vertical roller mills Boilers Example mass to mole basis If a coal has an ultimate analysis of H = 5 C = 90 and Ash = 5 find its molecular formula Assume a total mass of 100 lbm of coal The mass of carbon out of the total 100 lbm of coal is m C = 0.9 100 = 90 lbm carbon Number of moles of carbon is n C = m C M C.