CAJ | 학술논문

采用生物质焦和活性炭粉作还原剂,在管式炉中进行了低品位软锰矿焙烧还原对比试验.分别研究了焙烧温度、焙烧时间、生物质焦用量等条件对软锰矿还原率的影响,对焙烧产物进行了 X 射线衍射分析.结果表明,生物质焦在焙烧时间和还原效率上优于活性炭粉；软锰矿焙烧还原依次经历 MnO2→Mn2 O3→Mn3 O4→MnO 过程；在焙烧温度为800℃,焙烧时间为50 min,生物质焦用量为10%时,软锰矿还原率可达98%以上,在此基础上导出了还原动力学方程,并证实还原过程由界面化学反应控制,表观活化能为43.896 kJ?mol -1.
채용생물질초화활성탄분작환원제,재관식로중진행료저품위연맹광배소환원대비시험.분별연구료배소온도、배소시간、생물질초용량등조건대연맹광환원솔적영향,대배소산물진행료 X 사선연사분석.결과표명,생물질초재배소시간화환원효솔상우우활성탄분；연맹광배소환원의차경력 MnO2→Mn2 O3→Mn3 O4→MnO 과정；재배소온도위800℃,배소시간위50 min,생물질초용량위10%시,연맹광환원솔가체98%이상,재차기출상도출료환원동역학방정,병증실환원과정유계면화학반응공제,표관활화능위43.896 kJ?mol -1.
Roasting reduction contrast experiments of low-grade pyrolusite were performed by using biomass char and activated carbon as the reductant in a tube furnace.The effects of roasting temperature,roasting time and the dosage of biomass char on manganese reduction efficiency of pyrolusite were studied,and X-ray diffraction analysis was carried out for the roasting products. The results indicated that biomass char is obviously better than activated carbon in roasting time and manganese reduction efficiency.Roasting reduction of pyrolusite undergoes the process of MnO2→Mn2 O3→Mn3 O4→MnO.Manganese reduction efficiency greater than 98% was achieved when roasting temperature is 800 ℃,roasting time is 50 min and the dosage of biomass char is 10%.Based on the results,the reduction kinetics equation was derived,and it is confirmed that the reduction process is controlled by interface chemical reaction,and the apparent activation energy is about 43.896 kJ?mol -1 .