采用管式焙烧炉对一种赤铁矿粉球团的预热焙烧性能进行了研究,结果表明该赤铁矿球团预热焙烧性能较差,预热温度要达到1070℃,焙烧温度要达到1250℃时其预热焙烧球团的抗压强度才能达到生产要求.对该矿粉进行高压辊磨预加工后,其预热和焙烧性能得到改善,其预热和焙烧温度可分别降低70℃和50℃.进一步的研究结果表明,高压辊磨预加工赤铁矿粉后,小于5μm 微细颗粒含量增加,使焙烧球团的孔隙率降低,有利于Fe2 O3晶粒形成大片的晶桥连接,使得焙烧球团抗压强度得到提高.
The properties of hematite pellet were researched by electric tube furnace.The preliminary results show that the hematite pellet exhibits poor preheating and roasting properties,the compression strength of pellets could meet the requirements of commercial production only when preheating and roasting temperature reach over 1 070 ℃and 1 250 ℃ respectively.The preheating and roasting performance get improved when the hematite concentrate being processed by high pressure grinding roller (HPGR),preheating and roasting temperature will decrease 70 ℃and 50 ℃ respectively.The further studies reveal that the proportion of ultra fine-sized particles (<5μm)get in-creased and the porosity decrease for roasted pellets with the adoption of HPGR,which promote the formation of Fe2 O3 bonding bridges and increase of compression strength of roasted pellets.
参考文献
| [1] | 叶匡吾.我国球团厂建设中的几个问题[J].烧结球团,2005(01):1-3. |
| [2] | 郑红霞;汪琦;潘喜峰.磁铁矿球团氧化机理的研究[J].烧结球团,2003(5):13-16. |
| [3] | 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. |
| [4] | 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. |
| [5] | 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. |
| [6] | 杨雪峰.赤磁混合铁精矿球团焙烧固结机理[J].钢铁研究学报,2010(02):6-8,50. |
| [7] | 马福辉;杨晓源;宁加明;李光辉.昆钢球团回转窑结圈研究与预防[J].烧结球团,2006(5):19-22. |
| [8] | 聂建华;张子洋;乔婉;孙吉瑶;陈俊峰;周潜;梁永和.球团矿回转窑内结圈物的特性研究[J].武汉科技大学学报（自然科学版）,2010(5):527-531. |
| [9] | 李军;张化明.邯钢氧化球团回转窑结圈原因分析及预防[J].烧结球团,2007(3):55-58. |
| [10] | 刘树立.从昆钢氧化球团工程试生产成功看我国氧化球团的技术进步[J].烧结球团,2004(06):20-22. |
| [11] | T. Jiang;Y. B. Zhang;Z. C. Huang.Preheating and roasting characteristics of hematite-magnetite (H-M) concentrate pellets[J].Ironmaking & Steelmaking,20081(1):21-26. |
| [12] | 黄柱成;张元波;朱尚朴;庄剑鸣;罗秀全.以赤铁矿为主配加磁铁矿制备氧化球团的研究[J].钢铁,2004(4):9-13,59. |
| [13] | 薛敏.磁铁矿与赤铁矿在球团矿中合理配比的探讨[J].金属矿山,2010(01):67-70. |
| [14] | 罗主平;刘建华.高压辊磨机在我国金属矿山的应用与前景展望（一）[J].现代矿业,2009(2):33-37,85. |
| [15] | L.M. Tavares.Particle weakening in high-pressure roll grinding[J].Minerals Engineering,20057(7):651-657. |
| [16] | 魏盛远;张慧;陈玉平.高压辊磨机在国内外金属矿山的应用[J].现代矿业,2013(6):5-8. |
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