CAJ | 학술논문

传统湿法炼锌过程产生大量富含有价金属资源的铁酸锌废渣，铁的分离是实现铁酸锌废渣中有价金属资源回收的关键。提出含大量铁酸锌的锌浸出渣选择性还原焙烧?浸出分离铁和锌的新方法。通过热力学分析确定铁酸锌分解过程中Fe3O4和ZnO产物的优势区域，并发现V(CO)/V(CO+CO2)比是控制铁酸锌还原焙烧产物物相的关键因素，在V(CO)/V(CO+CO2)比在2.68%?36.18%范围内，铁酸锌优先分解生成在Fe3O4和ZnO。通过TG分析，确定铁酸锌还原焙烧的最佳条件为焙烧温度700?750°C，CO体积分数6%，V(CO)/V(CO+CO2)30%。基于上述研究结果，对富含铁酸锌的锌浸渣进行还原焙烧处理，焙烧产物经酸浸后，锌的浸出率达70%，铁的浸出率仅为18.4%，实现锌浸渣中锌和铁的有效分离。
전통습법련자과정산생대량부함유개금속자원적철산자폐사，철적분리시실현철산자폐사중유개금속자원회수적관건。제출함대량철산자적자침출사선택성환원배소?침출분리철화자적신방법。통과열역학분석학정철산자분해과정중Fe3O4화ZnO산물적우세구역，병발현V(CO)/V(CO+CO2)비시공제철산자환원배소산물물상적관건인소，재V(CO)/V(CO+CO2)비재2.68%?36.18%범위내，철산자우선분해생성재Fe3O4화ZnO。통과TG분석，학정철산자환원배소적최가조건위배소온도700?750°C，CO체적분수6%，V(CO)/V(CO+CO2)30%。기우상술연구결과，대부함철산자적자침사진행환원배소처리，배소산물경산침후，자적침출솔체70%，철적침출솔부위18.4%，실현자침사중자화철적유효분리。
The traditional zinc hydro-metallurgy generates a large amount of zinc ferrite residue rich in valuable metals. The separation of iron is crucial for resource recycling of valuable metals in zinc ferrite residue. A novel selective reduction roasting?leaching process was proposed to separate zinc and iron from zinc leaching residue which contains zinc ferrite. The thermodynamic analysis was employed to determine the predominant range of Fe3O4 and ZnO during reduction roasting process of zinc ferrite. Based on the result of thermodynamic calculation, we found thatV(CO)/V(CO+CO2) ratio is a key factor determining the phase composition in the reduction roasting product of zinc ferrite. In the range ofV(CO)/V(CO+CO2) ratio between 2.68% and 36.18%, zinc ferrite is preferentially decomposed into Fe3O4 and ZnO. Based on thermogravimetric (TG) analysis, the optimal conditions for reduction roasting of zinc ferrite are determined as follows: temperature 700?750 °C, volume fraction of CO 6% and V(CO)/V(CO+CO2) ratio 30%. Based on the above results, zinc leaching residue rich in zinc ferrite was roasted and the roasted product was leached by acid solution. It is found that zinc extraction rate in zinc leaching residue reaches up to 70% and iron extraction rate is only 18.4%. The result indicates that zinc and iron can be effectively separated from zinc leaching residue.