Recovery of iron from lead-zinc metallurgical slags by bath smelting
来源期刊：中南大学学报(英文版)2015年第4期
论文作者：LIU Qun WANG Chong-qing TAN Jun YIN Zhou-lan CHEN Qi-yuan LIAO Zhou ZHANG Ping-min LIU Yang
文章页码：1256 - 1263
Key words：lead smelter slag; iron sinking slag; desulfurization; reduction; thermal analysis
Abstract: The recovery of iron from iron sinking slag and lead smelter slag was investigated by desulfurization-reduction bath smelting. The effects of lead smelter slag (LSS) to iron sinking slag (ISS) mass ratio and temperature were investigated in desulfurization experiments. The X-ray diffraction (XRD) and X-ray fluorescence (XRF) analyses show that the optimum conditions are LSS:ISS of 3:7 and temperature of 1350°C. The composition of desulfurization products is mainly ZnFe2O4, and the desulfurization rate of 99.66% is obtained under optimum conditions. The thermogravimetric (TG) and differential scanning calorimeter (DSC) analyses demonstrate that reductant is necessary for decomposition and reduction of zinc ferrite in desulfurization product. The effects of reductant, temperature and feeding modes on iron enrichment were investigated in reduction experiments. The scanning electron microscope (SEM) and energy dispersive spectrometer (EDS) determination show that the iron content of reduction product is up to 99.36% under optimum conditions of coke as reductant, reduction temperature of 1450°C and the feeding mode of premixing.
LIU Qun(刘群)1, WANG Chong-qing(王重庆)1, TAN Jun(谭军)1, YIN Zhou-lan(尹周澜)1, CHEN Qi-yuan(陈启元)1, LIAO Zhou(廖舟)2, ZHANG Ping-min(张平民)1, LIU Yang(刘洋)1
(1. Key Laboratory of Resources Chemistry of Nonferrous Metals of Ministry of Education
(Central South University), Changsha 410083, China;
2. Zhuzhou Smelter Group Co., Ltd., Zhuzhou 412000, China)
Abstract:The recovery of iron from iron sinking slag and lead smelter slag was investigated by desulfurization-reduction bath smelting. The effects of lead smelter slag (LSS) to iron sinking slag (ISS) mass ratio and temperature were investigated in desulfurization experiments. The X-ray diffraction (XRD) and X-ray fluorescence (XRF) analyses show that the optimum conditions are LSS:ISS of 3:7 and temperature of 1350°C. The composition of desulfurization products is mainly ZnFe2O4, and the desulfurization rate of 99.66% is obtained under optimum conditions. The thermogravimetric (TG) and differential scanning calorimeter (DSC) analyses demonstrate that reductant is necessary for decomposition and reduction of zinc ferrite in desulfurization product. The effects of reductant, temperature and feeding modes on iron enrichment were investigated in reduction experiments. The scanning electron microscope (SEM) and energy dispersive spectrometer (EDS) determination show that the iron content of reduction product is up to 99.36% under optimum conditions of coke as reductant, reduction temperature of 1450°C and the feeding mode of premixing.
Key words:lead smelter slag; iron sinking slag; desulfurization; reduction; thermal analysis
