CAJ | 학술논문

采用煤基直接还原?磁选工艺对某高铁锰矿进行铁?锰分离的试验研究。不配加添加剂时磁性产物铁品位为59．42％，锰品位为20．73％；非磁性产物锰品位为48．88％，铁品位为5．91％。为强化铁?锰分离，选择Na2 CO3、Na2 SO4和Na2 S2 O3作为添加剂进行还原试验，结果表明3种添加剂在还原过程中都能促进铁?锰分离，且Na2 S2 O3效果最优。在Na2 S2 O3用量为5％时，磁性产物的铁品位提高至85．38％，锰品位降低至9．08％；非磁性产物的锰品位提高至54．72％，铁品位降低至2．59％。研究了加入添加剂前后焙烧矿的微观结构和物相转变，结果表明Na2 S2 O3有利于MnS和Mn2 SiO4的形成并促进了铁晶粒的聚集长大。
채용매기직접환원?자선공예대모고철맹광진행철?맹분리적시험연구。불배가첨가제시자성산물철품위위59．42％，맹품위위20．73％；비자성산물맹품위위48．88％，철품위위5．91％。위강화철?맹분리，선택Na2 CO3、Na2 SO4화Na2 S2 O3작위첨가제진행환원시험，결과표명3충첨가제재환원과정중도능촉진철?맹분리，차Na2 S2 O3효과최우。재Na2 S2 O3용량위5％시，자성산물적철품위제고지85．38％，맹품위강저지9．08％；비자성산물적맹품위제고지54．72％，철품위강저지2．59％。연구료가입첨가제전후배소광적미관결구화물상전변，결과표명Na2 S2 O3유리우MnS화Mn2 SiO4적형성병촉진료철정립적취집장대。
Experimental study was conducted on the separation between iron and manganese in one high?iron manganese ore using coal?based direct reduction. Test without any additives resulted in the magnetic product grade of 59. 42% Fe and 20.72% Mn, while non?magnetic product grade of 48.88% Mn and 5.91% Fe. For the further separation between iron and manganese, Na2 CO3 , Na2 SO4 and Na2 S2 O3 were chosen as sodium additives in reduction. Results showed that three additives all facilitated the Fe?Mn separation, with Na2 S2 O3 bringing in an optimum effect. Adding 5% Na2 S2 O3 , resulted in the magnetic product with Fe grade increased to 85. 38% and Mn grade decreased to 9?08%, while non?magnetic product with Mn grade increased to 54.72% and Fe grade decreased to 2.59%. The microstructures and phase transformation of roasted ores were analyzed before and after adding Na2 S2 O3 , showing that Na2 S2 O3 is beneficial for the formation of MnS and Mn2 SiO4 , as well as the aggregation of iron crystals.