EVAPORATION RATE OF SnS FROM SLAGS
炉渣中SnS的挥发速率

Under inert atmospheres and 1473K, the evaporation rate of SnS fromSnO--FeO0-SiO_2 and SnO--FeO--CaO--SiO_2 slags mixed with FeS was investigated by meas-uring the weight loss and composition of samples. The experimental results show that during sulfide fuming process the evaporation of SnO from Slags is negligible in comparison with that of SnS. Addition of CaO to slags can enhance the evaporation rate of SnS. The differential rate equation of evaporation may be expressed as:-d(%Sn) / dt = k(%Sn)(%S)where, the apparent rate constant k was found to be 4.20×10~(-3) for SnO--FeO--CaO--SiO_2 sys-tem and 2.88×10~(-3) for SnO--FeO--SiO_2 system, respectively.