对镜铁矿粉在铁矿烧结混合料中的制粒行为进行了研究，结果表明：水分对制粒效果有显著的影响，随着镜铁矿粉配比增加，适宜制粒水分逐渐降低。不同配比镜铁矿粉的制粒动力学研究表明：制粒时间小于3 min时，镜铁矿黏附率快速增长；制粒时间大于3 min时，镜铁矿黏附率趋于稳定。随着镜铁矿粉配比增加，达到黏附平衡所需时间延长。因此，延长制粒时间是改善高配比镜铁矿粉制粒效果的有效措施之一。准颗粒黏附层微观结构研究表明：镜铁矿颗粒呈散点状分布于黏附层中，微细粒级褐铁矿粉颗粒作为黏结剂使黏附层具有一定的强度，促进镜铁矿粉的黏附。镜铁矿粉与制粒性能优良的褐铁矿粉合理搭配使用，有利于改善制粒效果，提高镜铁矿粉配比。
The granulation behaviors of specularite fines in ferrous sinter mixture were studied. The results showed that the moisture had a great effect on granulation,and the optimal moisture content decreased with the increasing specularite fines ratio in the mixture. The dynamic results with different specularite fines ratio showed that the adhering load of specu-larite fines increases rapidly within 3 min and then levels off. With an increase of specularite fines ratio,the duration needs longer time to reach adhering balance. Therefore it’s an effective way to improve the granulation by extending gran-ulating time at high specularite fines ratio. The microstructures of the layer showed that particles of specularite fines scat-ter all over the layer without combination which infers that the particles of limonite fines act as a binder between specula-rite fines and improve the strength of the adhering layer. Granulation and specularite fines ratio could be improved by us-ing specularite fines and limonite fines in the mixture properly.
参考文献
| [1] | 赵德义.加拿大精粉的冶炼可行性试验[J].河南冶金,2013(05):5-6,19. |
| [2] | 王素平,毕学工,李军.加拿大精矿烧结性能试验研究[J].钢铁研究,2008(06):1-4,20. |
| [3] | 朱德庆,王志远,潘建,李建,徐小锋.巴西某镜铁精粉的烧结特性及强化工艺[J].中南大学学报（自然科学版）,2006(05):878-883. |
| [4] | 陈伟,高丙寅,杨玉兵,马永广.镜铁矿烧结性能试验研究[J].河南冶金,2012(03):6-8,21. |
| [5] | 潘建,师本敬,朱德庆,李晓波.加拿大某精矿高配比烧结特性[J].钢铁,2014(09):21-28. |
| [6] | 孟君 .基于巴西铁矿的烧结基础性能研究[D].中南大学,2008. |
| [7] | P. C. Kapur;V. Runkana .Balling and granulation kinetics revisited[J].International Journal of Mineral Processing,2003(1/4):417-427. |
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