This paper mainly investigated the antimony recovery from antimony-bearing dusts through reduction roasting process after the dust firstly oxidation roasted.CO–CO2 mixture gas was used as reducing agent,and the antim...This paper mainly investigated the antimony recovery from antimony-bearing dusts through reduction roasting process after the dust firstly oxidation roasted.CO–CO2 mixture gas was used as reducing agent,and the antimony-containing phase was reduced into Sb4O6,volatilized into smoke,and finally recovered through the cooling cylinder.The antimony recovery rate increased from 66.00 wt%to 73.81 wt%in temperature range of 650 to 800°C,and decreased with temperature increased further to 900°C due to the reduction of Sb4O6 to the nonvolatile Sb.Similarly,the CO partial pressure also played a double role in this test.Under optimized conditions of roasting temperature of 800°C,CO partial pressure of 7.5 vol%and roasting time of 120 min,98.40 wt%of arsenic removal rate and 80.40 wt%antimony recovery rate could be obtained.In addition,the“As2O3”product could be used for preparing ferric arsenate which realized the harmless treatment of it.展开更多
基金Project(51564034)supported by the National Science Fund for Distinguished Regional Scholars,China
文摘This paper mainly investigated the antimony recovery from antimony-bearing dusts through reduction roasting process after the dust firstly oxidation roasted.CO–CO2 mixture gas was used as reducing agent,and the antimony-containing phase was reduced into Sb4O6,volatilized into smoke,and finally recovered through the cooling cylinder.The antimony recovery rate increased from 66.00 wt%to 73.81 wt%in temperature range of 650 to 800°C,and decreased with temperature increased further to 900°C due to the reduction of Sb4O6 to the nonvolatile Sb.Similarly,the CO partial pressure also played a double role in this test.Under optimized conditions of roasting temperature of 800°C,CO partial pressure of 7.5 vol%and roasting time of 120 min,98.40 wt%of arsenic removal rate and 80.40 wt%antimony recovery rate could be obtained.In addition,the“As2O3”product could be used for preparing ferric arsenate which realized the harmless treatment of it.
