The rotating lance, tested in the CaO-Mg and CaC2-Mg processes,
promotes a 20% and 30% increase, respectively, in the desulphurization
rate, a 50% reduction of temperature drop, and a reduction of
metal splash occurrences. A criterion was developed that takes into
account the equipment dimensions and the mass flow rates of gas
and desulphurization material, with the objective of transposing the
results obtained at Usiminas steel shop n°1 desulphurization station,
to other industrial plants. Furthermore, it allows simulations to be
made with the objective of optimizing the pig iron desulphurization
processes that use the above mentioned materials as desulphurization
agents.