.160 北京科技大学学报 第35卷 而加快还原的进行.孔隙率对脱锌率的影响与金属 相关处理工艺比较.炼铁，2010,29(4：56) 化率类似，只是不及对金属化率的影响大.同时从 [3 Ibaraki T,Oda H.Dust recycling technology by the ro- 图中可以看到，球团孔隙率由0.3增加到0.5，还原 tary hearth furnace at Nippon Steel's Kimitsu Works.Rev 15min,对应的金属化率由78.9%变为80.5%，而脱 Metall Cah Inf Tech,2002,99(10):809 锌率都可达97%以上. [4)Shi J Y,Donskoi E,McElwain D L S.Modelling the re- duction of an iron ore-coal composite pellet with conduc- 1(0 tion and convection in an axisymmetric temperature field. Math Comput Modell,2005,42(1/2):45 [5 Valipour M S,Motamed Hashemi M Y,Saboohi Y.Math- ematical modeling of reaction in an iron ore pellet using a mixture of hydrogen,water vapor,carbon monoxide and carbon dioxide:an isothermal study.Adu Powder Tech- 40 nol,2006,17(3):277 (6]Coetsee T,Pistorius P C,de Villiers EE.Rate- determining steps for reduction in magnetite-coal pellets. Miner Eng,2002,15(11):919 8 12 20 [7)Wang A J,Wang S H.Numerical simulation of direct 还原时间/山 reduction process of carbon-bearing pellets.J Univ Sci 图6球团孔隙率对脱锌率的影响 Technol Beijing,1998,20(6):517 Fig.6 Influence of pellet porosity on the zinc removal rate (王爱军，王尚槐.含碳球团直接还原过程的数值模拟.北 京科技大学学报，1998,20(6)：517) 5结论 (8]Haque R,Ray H S,Mukherjee A.Reduction of iron ore fines by coal char fines:development of a mathematical (1)本模型适用于转底炉处理含锌粉尘内配碳 model.Scand J Metall,1992,21(2):78 球团直接还原过程的模拟，且实验室结果与模拟值 [9]Peng B,Zhang C F,Peng J.Research on the rate of zinc 基本吻合，可以对球团的脱锌率、金属化率、碳的 oxide reduction with CO.J Cent South Univ Technol, 气化速率以及球团内部温度场、气体成分的变化等 2001,32(2:189 过程进行预测，进而对转底炉的生产提供理论指导 (彭兵，张传福，彭及.CO还原氧化锌速率的研究.中南工 (2)炉温对球团的金属化率和脱锌率都有较大 业大学学报，2001,32(2)：189) 影响.球团半径和孔隙率对球团的最终金属化率有 [10 Rao Y K.The kinetics of reduction of hematite by carbon 一定影响，但均不如炉温的影响显著；而两者对球 Metall Trans,1971,2(5):1439 团的最终脱锌率都基本没有影响 [11]Rao Y K,El-Rahaiby S K.Direct reduction of lead sulfide (3)含锌粉尘内配碳球团转底炉还原工艺中， with carbon and lime;effect of catalysts:Part II.Analyt- 控制炉温在1573K,碳氧比为1.0，球团半径为10 ical model.Metall Trans B,1985,16(3):477 [12]Han Q Y.Kinetics of Metallurgical Process.Beijing:Met- mm,还原时间为15min,球团孔隙率为0.4，能够 allurgical Industry Press,1983 得到金属化率为79.4%，脱锌率为97.8%的金属化 (韩其勇.冶金过程动力学.北京：冶金工业出版社，1983) 球团，可作为优质含铁炉料用于高炉生产 [13]Akiyama T,Ohta H,Takahashi R,et al.Measurement and modeling of thermal conductivity for dense iron oxide 参考文献 and porous iron ore agglomerates in stepwise reduction. S1J1mt,1992,32(7):829 [1]Yang X F,Chu M S,Shen F M,et al.Mechanism of zinc [14]Donskoi E,McElwain D L S.Estimation and modeling of damaging to blast furnace tuyere refractory.Acta Metal parameters for direct reduction in iron ore/coal compos- Sin Engl Lett,2009,22(6):454 ites:Part I.Physical parameters.Metall Mater Trans B. [2]She X F,Xue Q G,Wang J S,et al.Comprehensive uti- 2003,34(1):93 lization of zinc-bearing dust and comparison of treatment [15]McAdam G D,O'Brien D J,Marshall T.Rapid reduction processes.Ironmaking,2010,29(4):56 of New Zealand ironsands.Ironmaking Steelmnaking,1977, (佘雪峰，薛庆国，王静松，等.钢铁厂含锌粉尘综合利用及 4(1):1