Abstract: With a shaft furnace of 2×10⁴ tons annual capacity for vanadium titano-magnetite roasting as the research object， a three-dimensional steady-state heat transfer mathematical model of shaft furnace was established. The reaction heat was complied into solid phase energy equation in the form of internal heat source by UDF and the pellet velocity was defined. The roasting time and temperature were used as the evaluation indexes in order to study the effects of operation parameters on heat transfer performance. The results show that the roasting and cooling air volume rates and the pellets velocity are three main factors and the influence of the last one is the largest. Under the conditions of 38mm pellet diameter， 4~6h roasting time and 1100~1200K roasting temperature， the suitable operating parameters are obtained as: the cooling air volume rate is 1210~1430m³/h; the roasting air volume rate is 3070~3670m³/h; and the moving down velocity of pellets is 0.258~0.290m/h.

Key words: vanadium titano-magnetite, shaft furnace, heat transfer, numerical simulation, moving bed