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第9期 王纪学等:低品位软锰矿流态化还原焙烧 ·991· 还原反应由界面化学反应控制. and recent advances.China Manganese Ind,2008,26(2):4 (李同庆.低品位软锰矿还原技术与研究进展.中国锰业, 4结论 2008,26(2):4) [6]Zhang H Q,Ding C G,Zhao L.Study on the fluidizing reduction (1)通过冷态气体流量实验,根据床层压力一 of manganese dioxide ore.Met Mine,2009(2):82 流量特性曲线确定实验中焙烧物料呈悬浮状态所需 (张汉泉,丁长桂,赵雷.二氧化锰流态化还原试验研究.金属 的流化风量为0.4m3h1 山,2009(2):82) (2)实验确定在焙烧温度800℃、焙烧时间3 [7]Zhang H Q,Yu Y F,Lu X S,et al.Study on reducing roasting of suspending manganese oxide ore.Min Metall Eng.2010,30(4): min以及C0体积分数10%时,可以获得一个较好 40 的还原效果,软锰矿中二氧化锰的还原率可达97% (张汉泉,余永富,陆小苏,等.软锰矿悬浮还原培烧试验研 以上 究.矿治工程,2010,30(4):40) (3)流态化还原焙烧与静态堆积焙烧相比,可 [8]Ren Y F.Study on Flash Magnetization Roasting Technology for 大大缩短还原焙烧时间,并能显著地提高还原效率, Refractory Lowgrade Red Iron Ores [Dissertation].Wuhan:Wu- 具有较好的工业应用前景 han University of Technology,2006 (任亚峰.细粒红铁矿闪速磁化培烧[学位论文].武汉:武汉 (4)通过动力学研究,证实了还原过程由界面 理工大学,2006) 化学反应控制,计算得反应的表观活化能为38.817 Srinivasan N S.Reduction of iron oxides by carbon in a circulating kJmol-,并导出还原反应的动力学方程为 fluidized bed reactor.Powder Technol,2002,124:28 f=10m3t3-15m22+9mt. [10]Zhang W.A review of techniques for the process intensification of 式中, fluidized bed reactors.Chin J Chem Eng,2009.17(4):688 [11]Wang G J,Wang Z H,Yang L,et al.Experiments on roasting m=ep1.0734-4669 (1+K)(C-C) technology magnetic separation of oolitic hematite ore by the cir- T Krap culating fluidized bed.Met Mine,2010(2):57 (王国军,王智化,杨丽,等.某鲕状赤铁矿循环流化床培烧- 参考文献 磁选试验研究.金属矿山,2010(2):57) ]Zhang Q F.General situation of manganese ore beneficiation at 02] Jiang G C,Xu K D,Xu J L,et al.Mechanism of reduction of home and abroad.China Mine Eng,2004,33(6):16 carbon bearing Mn-ore lump in solid state.J Irion Steel Res, (张去非.国内外锰矿选矿工艺概述.中国矿山工程,2004,33 1991,3(3):1 (6):16) (蒋国吕,徐匡迪,徐建伦,等.含碳锰矿块固态还原的反应 Wang E X.The resources of Chinese manganese ore.Chin Battery 机理.钢铁研究学报,1991,3(3):1) md,2007.12(3):184 [13]Hua Y X.The Kinetics Introduction of Metallurgical Process.Bei- (王尔贤.中国的锰矿资源.电池工业,2007,12(3):184) jing:Metallurgical Industry Press,2004 3]Zhang J S,Zhou G H.A review of manganese ore resources in (华一新.治金过程动力学导论.北京:治金工业出版社, China and its processing technology progress.China Manganese 2004) lnd,2006,24(1):1 [14]Chu M S,Fang J.Dynamics analysis of Fe ore direct reduction (张泾生,周光华.我国锰矿资源及选矿进展评述.中国锰 process in circulating fluidized bed.J Northeast Unin Nat Sci, 业,2006,24(1):1) 2001,22(2):140 4]SongJJ,Zhang P.Low grade manganese oxide ore reduction re- (储满生,方觉.循环流化床铁矿石直接还原过程动力学分 covery process.Hebei Chem Eng Ind,2010,33(5):44 析.东北大学学报:自然科学版,2001,22(2):140) (宋静静,张萍.低品位氧化锰矿中锰的还原回收.河北化 [15]Piotrowski K,Mondal K,Wiltowski T,et al.Topochemical ap- 工,2010,33(5):44) proach of kinetics of the reduction of hematite to wustite.Chem [5]Li T Q.Technology of low grade pyrolusite ore reduction process EngJ,2007,131(13):73第 9 期 王纪学等: 低品位软锰矿流态化还原焙烧 还原反应由界面化学反应控制. 4 结论 ( 1) 通过冷态气体流量实验,根据床层压力-- 流量特性曲线确定实验中焙烧物料呈悬浮状态所需 的流化风量为 0. 4 m3 ·h - 1 . ( 2) 实验确定在焙烧温度 800 ℃、焙烧时间 3 min 以及 CO 体积分数 10% 时,可以获得一个较好 的还原效果,软锰矿中二氧化锰的还原率可达 97% 以上. ( 3) 流态化还原焙烧与静态堆积焙烧相比,可 大大缩短还原焙烧时间,并能显著地提高还原效率, 具有较好的工业应用前景. ( 4) 通过动力学研究,证实了还原过程由界面 化学反应控制,计算得反应的表观活化能为 38. 817 kJ·mol - 1 ,并导出还原反应的动力学方程为 f = 10m3 t 3 - 15m2 t 2 + 9mt. 式中, m = ( exp 1. 073 4 - 4 669 ) T ( 1 + K) ( C0 - C* ) Krm ρ . 参 考 文 献 [1] Zhang Q F. General situation of manganese ore beneficiation at home and abroad. China Mine Eng,2004,33( 6) : 16 ( 张去非. 国内外锰矿选矿工艺概述. 中国矿山工程,2004,33 ( 6) : 16) [2] Wang E X. The resources of Chinese manganese ore. Chin Battery Ind,2007,12( 3) : 184 ( 王尔贤. 中国的锰矿资源. 电池工业,2007,12( 3) : 184) [3] Zhang J S,Zhou G H. A review of manganese ore resources in China and its processing technology progress. China Manganese Ind,2006,24( 1) : 1 ( 张泾生,周光华. 我国锰矿资源及选矿进展评述. 中国锰 业,2006,24( 1) : 1) [4] Song J J,Zhang P. Low grade manganese oxide ore reduction re￾covery process. Hebei Chem Eng Ind,2010,33( 5) : 44 ( 宋静静,张萍. 低品位氧化锰矿中锰的还原回收. 河北化 工,2010,33( 5) : 44) [5] Li T Q. Technology of low grade pyrolusite ore reduction process and recent advances. China Manganese Ind,2008,26( 2) : 4 ( 李同庆. 低品位软锰矿还原技术与研究进展. 中国锰业, 2008,26( 2) : 4) [6] Zhang H Q,Ding C G,Zhao L. Study on the fluidizing reduction of manganese dioxide ore. Met Mine,2009( 2) : 82 ( 张汉泉,丁长桂,赵雷. 二氧化锰流态化还原试验研究. 金属 矿山,2009( 2) : 82) [7] Zhang H Q,Yu Y F,Lu X S,et al. Study on reducing roasting of suspending manganese oxide ore. Min Metall Eng,2010,30( 4) : 40 ( 张汉泉,余永富,陆小苏,等. 软锰矿悬浮还原焙烧试验研 究. 矿冶工程,2010,30( 4) : 40) [8] Ren Y F. Study on Flash Magnetization Roasting Technology for Refractory Low-grade Red Iron Ores [Dissertation]. Wuhan: Wu￾han University of Technology,2006 ( 任亚峰. 细粒红铁矿闪速磁化焙烧[学位论文]. 武汉: 武汉 理工大学,2006) [9] Srinivasan N S. Reduction of iron oxides by carbon in a circulating fluidized bed reactor. Powder Technol,2002,124: 28 [10] Zhang W. A review of techniques for the process intensification of fluidized bed reactors. Chin J Chem Eng,2009,17( 4) : 688 [11] Wang G J,Wang Z H,Yang L,et al. Experiments on roasting technology magnetic separation of oolitic hematite ore by the cir￾culating fluidized bed. Met Mine,2010( 2) : 57 ( 王国军,王智化,杨丽,等. 某鲕状赤铁矿循环流化床焙烧- 磁选试验研究. 金属矿山,2010( 2) : 57) [12] Jiang G C,Xu K D,Xu J L,et al. Mechanism of reduction of carbon bearing Mn-ore lump in solid state. J Irion Steel Res, 1991,3( 3) : 1 ( 蒋国昌,徐匡迪,徐建伦,等. 含碳锰矿块固态还原的反应 机理. 钢铁研究学报,1991,3( 3) : 1) [13] Hua Y X. The Kinetics Introduction of Metallurgical Process. Bei￾jing: Metallurgical Industry Press,2004 ( 华一新. 冶金过程动力学导论. 北京: 冶金工业出版社, 2004) [14] Chu M S,Fang J. Dynamics analysis of Fe ore direct reduction process in circulating fluidized bed. J Northeast Univ Nat Sci, 2001,22( 2) : 140 ( 储满生,方觉. 循环流化床铁矿石直接还原过程动力学分 析. 东北大学学报: 自然科学版,2001,22( 2) : 140) [15] Piotrowski K,Mondal K,Wiltowski T,et al. Topochemical ap￾proach of kinetics of the reduction of hematite to wustite. Chem Eng J,2007,131( 1-3) : 73 ·991·
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