EVAPORATION RATE OF SnS FROM SLAGS

Abstract

Abstract: Under inert atmospheres and 1473 K,the evaporation rate of SnS from SnO-FeO- SiO_2 and SnO-FeO-CaO-SiO_2 slags mixed with FeS was investigated by measuring the weight Ioss and composition of samples.The experimental results show that dur- ing sulfide fuming process the evaporation of SnOfrom slags is negligible in comparison with that of SnS.Addition of CaOto 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 system and 2.88×10~(-3) for SnO-FeO-SiO_2 system,respectively.

Key words: SnS, slag, evaporation rate, fuming

HUA Yixin LIU Chunpeng Kunming Institute of Technology,Kunming,China. EVAPORATION RATE OF SnS FROM SLAGS[J]. Acta Metallurgica Sinica (English Letters), 1992, 5(10): 235-239.

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EVAPORATION RATE OF SnS FROM SLAGS

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