第 38 卷2013 年 12 月第 6 期烧Sintering and Pelletizing结球团收稿日期:2013 - 05 - 28基金项目 : 内蒙古科技大学创新基金项目 ( 2009NC012)作者简介: 罗果萍( 1964 - ) ,女,博士,教授,主要从事冶金新工艺技术研究。F、K、Na 对氧化球团回转窑结圈性能的影响罗果萍1,3,聂小龙1,吴胜利3,王永斌1,3,刘吉涛2,周胜刚2( 1. 内蒙古科技大学材料与冶金学院,内蒙古 包头014010; 2. 包头钢铁( 集团) 公司 还原铁厂,内蒙古 包头014010; 3. 北京科技大学冶金与生态工程学院,北京10083)摘要: 通过添加钾板岩、钠辉石岩和 CaF2试剂改变压团原料中 K、Na 和 F 的含量, 采用灰锥法研究压团试样的软熔性能,并对焙烧后的压团试样进行抗压强度、矿相组成和显微结构研究,以探明包钢球团原料中 F、K、Na 对回转窑结圈的影响。 研究结果表明,随着 F、K 和 Na 含量的增加,压团试样的软熔变形温度和抗压强度明显降低、 赤铁矿含量减少、 液相含量显著增多。 当 K2O + Na2O 含量由 0. 18% 升高到0. 40% 时,液相含量即由 5. 9% 增加到 10. 9% 。 随着 K2O + Na2O 含量升高, 压团试样孔隙率降低, 而 F含量增加试样孔隙率变化很小。 包钢球团原料中的 F、 K、 Na 导致回转窑结圈加重、 结圈物固结强度降低。关键词: 回转窑结圈;F;K;Na中图分类号: TF046. 6文献标识码: A文章编号: 1000 - 8764( 2013) 06 - 0029 - 04Influence of F,K,Na on the Ring Formation Properties of Oxidized Pellet Rotary KilnLUO Guo-ping1,3,NIE Xiao-long1,WU Sheng-li3,WANG Yong-bin1,3,LIU Ji-tao2,ZHOU Sheng-gang2( 1. School of Material and Metallurgy,University of Science and Technology Inner Mongolia,Baotou 014010,Inner Mongolia;2. Iron reduction Plant,Baotou Iron and Steel ( Group) Co. ,Baotou 014010,Inner Mongolia;3. School ofMetallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083)AbstractThe content of K, Na and F in the briquetting raw materials was changed by adding potassium slate, sodiumpyroxenite and CaF2reagent, the pyramid method was adopted to study the softening and melting properties of the briquettingsamples,and the compressive strength, mineralogical composition and microstructure of the samples after being roasted werestudied in order to find out the influence of F,K, Na on the ringing properties of the rotary kiln. The results show that, with theincrease of F,K and Na content, the compressive strength and soft melting temperature of the samples decrease obviously, thehematite content reduces,and the liquid phase increases remarkably. When the content of K2O + Na2O is increased from 0. 18%to 0. 40% , the liquid phase content increases from 5. 9% to 10. 9% . With the rising of K2O + Na2O content, the porositydecreases,but the porosity change of samples with the increase of F content is little. The F,K and Na in Baotou Steel pellet rawmaterial will lead to increasing of rotary kiln ringing and reducing of accretion consolidation strength.Key wordsringing of rotary kiln;fluorine;potassium;sodium