研究了3种不同粒度的超细磁铁精矿粉，粒度小于0.044 mm的矿粉质量分数在89%以上。试验研究了其制备的球团矿的焙烧性能。试验结果表明，铁精矿粉粒度越细，球团矿在最佳焙烧制度下获得的抗压强度也越高，但适宜的预热温度也越低，而所需预热及焙烧时间也越长。在对生球孔隙率测试研究的基础上发现，精矿粒度越细，生球孔隙率越小，氧化变得越困难，需要较长的预热时间，而预热温度太高，表层易形成致密层，导致球团矿强度下降；在对适宜的焙烧制度下焙烧的球团矿的FeO含量测定结果表明，对于焙烧球团矿，随矿粉粒度的变细，其FeO含量则越高，表明氧化条件变差，需较长的焙烧时间。
The researches were carried out on three kinds of super-fine magnetite concentrate with nearly 89%of the ma-terial being less than 0.044 mm. The results show that the compression strength of roasted pellets increase with the increas-ing of proportion for minus 0.044 mm, but pellets must be roasted with lower preheating temperature and longer preheat-ing and roasting time. The research work on the changes of porosity of green pellets indicates that the finer the iron con-centrate become, the lower porosity pellet get, so the pellet must be roasted at lower preheating temperature to avoid the formation of crusted layer, which deteriorates the compression strength of pellet. The pellet also must be roasted at longer preheating time to compensate the slower oxidization process because of lower porosity of pellet. The research work on the FeO content of pellet indicates that the finer the iron concentrate become, the lower FeO content of pellet attain, so the pellet must be roasted at longer roasting time to guarantee the effective oxidization process.
参考文献
| [1] | 范晓慧,袁晓丽,姜涛,袁礼顺,李光辉,庄剑鸣,唐启荣,杨雪峰.铁精矿粒度对球团强度的影响[J].中国有色金属学报,2006(11):1965-1970. |
| [2] | 王昌安,罗廉明.铁精矿粒度组成对球团质量的影响[J].武汉化工学院学报,2005(02):38-39,44. |
| [3] | 傅菊英,李云涛,姜昌伟,王黎光.磁铁精矿球团氧化动力学[J].中南大学学报（自然科学版）,2004(06):950-954. |
| [4] | 姜昌伟;傅菊英;李思导 .凹山磁铁精矿球团焙烧特性研究[J].中南工业大学学报,2004,35(06):435. |
| [5] | 康兴东,夏春才,陈志英,刘建朋,马蕾,张华丽.提高大冶铁精矿球团质量的试验研究[J].金属矿山,2008(10):67-69,75. |
| [6] | 范建军,张文平,刘慈光,赵国栋,席玉明.预热焙烧参数对超细粒度磁铁矿粉球团性能的影响[J].钢铁,2013(12):20-24. |
| [7] | Deqing ZHU;Jian PAN;Guanzhou QIU;John CLOUT;Changan WANG;Yufeng GUO;Chenfan HU .Mechano-chemical Activation of Magnetite Concentrate for Improving Its Pelletability by High Pressure Roll Grinding[J].ISIJ International,2004(2):310-315. |
| [8] | QIU Zhuan-zhou;ZHU De-qin;PAN Jian et al.Improve the Oxi-dizing Kinetics of Pelletization of Magnetite Concentrate by High Press Roll Grinding[J].ISIJ International,2004,44(01):69. |
| [9] | 范建军,杨礼元.高压辊磨预处理对超细粒度磁铁精矿粉球团性能的影响[J].钢铁,2012(09):19-24. |
| [10] | FAN Jian-jun,QIU Guan-zhou,JIANG Tao,GUO Yu-feng,HAO Hai-zheng,YANG Yong-bin.Mechanism of high pressure roll grinding on compression strength of oxidized hematite pellets[J].中南大学学报（英文版）,2012(09):2611-2619. |
| [11] | FAN Jian-jun,QIU Guan-zhou,JIANG Tao,GUO Yu-feng,CAI Mei-xia.Roasting Properties of Pellets With Iron Concentrate of Complex Mineral Composition[J].钢铁研究学报：英文版,2011(07):1-7. |
| [12] | FAN Jian-jun,QIU Guan-zhou,JIANG Tao,GUO Yu-feng,MU Ke-lang.Improvement of Sinter Properties With Ultra Fine-Sized Iron Concentrate by HPRG[J].钢铁研究学报（英文版）,2013(09):47-52. |
| [13] | 傅菊英;朱德庆.铁矿氧化球团基本原理、工艺及设备[M].长沙:中南大学出版社,2005 |
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