Melting properties of preparing compound Desulphurizer by aluminothermy reducing caustic calcined dolomite

摘要

Taken caustic calcined dolomite based compound desulfurizer as the research object, influence of fluxing agent CaF_2, Al_2O_3, SiO_2 and heating agent on the melting temperature of the compound desulfurizer was mainly investigated during its directly reducing process. Fluxing agent SiO_2 and heating agent are the main influence factors, which influence melting temperature of the compound desulfurizer, the next are CaF_2 and Al_2O_3. The mean value of compound desulfurizer melting temperature is respectively 1190.3?C and 1199.1?C when the addition amount of SiO_2 and heating agent is respectively 8.33% and 33.55%. With the increase of CaF_2, the mean value of compound desulfurizer melting temperature decreases gradually, however, which increases first and then decreases with the increase of Al_2O_3.The conditions of the lowest melting temperature about the compound desulfurizer is A_4, B_1, C_1, D_2, namely 9% CaF_2 + 0% Al_2O_3 + 8.33% SiO_2 + 33.55% heating agent.