通过热力学计算、动力学试验以及还原产物微观形貌扫描电镜分析，研究 Na2O·Fe2O3在Fe2O3/MgFe2O4-Na2CO3-C还原体系中的作用。结果表明：在该体系中，Na2CO3与Fe2O3或MgFe2O4快速反应生成更易被碳还原的Na2O·Fe2O3，从而降低还原反应的起始温度，并加速反应的进行；Na2O·Fe2O3还能促进含铁矿物碳热还原过程中铁晶粒的长大，有利于后续铁矿物的磁选分离。
The effects of Na2O·Fe2O3in the Fe2O3/MgFe2O4-Na2CO3-C were identified by thermodynamic calculation, kinetic research and microscopic morphology analyses of reduction products. The results show that Na2O·Fe2O3 readily reduced by carbon is rapidly formed by the reaction of Fe2O3 (or MgFe2O4) and Na2CO3, resulting in the decrease of the initial reduction reaction temperature of Fe2O3/MgFe2O4-Na2CO3-C system and the acceleration of the reduction reaction. Na2O·Fe2O3 can also promotes the growth of iron grains during the reduction process, and thus is in favor of the magnetic separation of the reduction products.
参考文献
| [1] | LI Xiao-bin;XIAO Wei;LIU Wei;LIU Gui-hua;PENG Zhi-hong;ZHOU Qiu-sheng;QI Tian-gui.Recovery of alumina and ferric oxide from Bayer red mud rich in iron by reduction sintering[J].中国有色金属学报（英文版）,2009(05):1342-1347. |
| [2] | 齐天贵 .铬铁矿强氧化焙烧理论与技术研究[D].中南大学,2011. |
| [3] | 王纪明;彭兵;柴立元;李密;彭宁.锌浸渣还原焙烧-磁选回收铁[J].中国有色金属学报（英文版）,2012(5):1455-1461. |
| [4] | 杨慧芬;景丽丽;党春阁.铜渣中铁组分的直接还原与磁选回收[J].中国有色金属学报,2011(5):1165-1170. |
| [5] | 郭培民;赵沛;张殿伟.低温下碳还原氧化铁的催化机理研究[J].钢铁钒钛,2006(4):1-5. |
| [6] | 黄柱成;蔡凌波;张元波;杨永斌;姜涛.Na2CO3和CaF2强化赤泥铁氧化物还原研究[J].中南大学学报（自然科学版）,2010(3):838-844. |
| [7] | 姜涛;刘牡丹;李光辉;孙娜;曾精华;邱冠周.钠化还原法处理高铝褐铁矿新工艺[J].中国有色金属学报,2010(3):565-571. |
| [8] | 李光辉;饶明军;姜涛;史唐明;黄晴晴.红土镍矿钠盐还原焙烧-磁选的机理[J].中国有色金属学报,2012(1):274-280. |
| [9] | G. Power;M. Grafe;C. Klauber.Bauxite residue issues: I. Current management, disposal and storage practices[J].Hydrometallurgy,20111/2(1/2):33-45. |
| [10] | 庄锦强 .高铁氧化铝赤泥中铁的回收技术研究[D].中南大学,2012. |
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