包钢低硅烧结矿的冶金性能
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摘要
在通过红外微型烧结试验,确定温度、碱度、MgO含量及SiO2含量对包钢低硅烧结矿黏结相强度影响强弱顺序以及黏结相强度最优、较好、较差及最差的包钢低硅烧结工艺条件基础上,采用烧结杯对上述4种烧结矿的黏结相强度进行验证,并对其冶金性能进行研究。结果表明,低硅烧结的最佳工艺条件为:SiO2含量(质量分数,下同)4.0%、碱度2.5、MgO含量1.6%、配碳量3.8%。在此工艺条件下获得的包钢低硅烧结矿具有优良的冷态强度(转鼓强度83.1%),软熔滴落性能(tS为1 307.3℃,tD-tS为98℃)优于包钢烧结矿,还原性(RI为83.65%)较好。尽管低温还原粉化性与目前包钢烧结矿相当,但综合评价,包钢低硅烧结矿可以满足高炉炼铁的需求。
The metallurgical properties of low silicon sinters in Baotou Iron and Steel(Group) Co.were investigated by means of sinter pot test,and the sintering process of them had determined by mini-sintering test in previous research.Then the results were contrasted with the sinters utilized by BF ironmaking.The results shows that the optimal sintering process of Baogang low silicon sinter is SiO2 content 4.0%,basicity 2.5,MgO content 1.6%,carbon addition 3.8%,which behaves excellent cold strength(drum index 83.1%),softening-melting properties(tS 1 307.3 ℃,tD-tS 98 ℃) and reducibility(RI 83.65%).Although its low temperature reduction disintegration is close to that of the sinter being utilized at present,it can be satisfied with BF ironmaking.
The metallurgical properties of low silicon sinters in Baotou Iron and Steel(Group) Co.were investigated by means of sinter pot test,and the sintering process of them had determined by mini-sintering test in previous research.Then the results were contrasted with the sinters utilized by BF ironmaking.The results shows that the optimal sintering process of Baogang low silicon sinter is SiO2 content 4.0%,basicity 2.5,MgO content 1.6%,carbon addition 3.8%,which behaves excellent cold strength(drum index 83.1%),softening-melting properties(tS 1 307.3 ℃,tD-tS 98 ℃) and reducibility(RI 83.65%).Although its low temperature reduction disintegration is close to that of the sinter being utilized at present,it can be satisfied with BF ironmaking.
引文
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[15]张玉柱,冯向鹏,李振国,等.改善低硅烧结矿冶金性能的研究及实践[J].烧结球团,2004,29(1):4.
[2]伍成波,尹国亮,程小利,等.改善低硅烧结矿低温还原粉化性能的研究[J].钢铁,2010,45(4):16.
[3]边妙莲.低硅烧结及应对措施的研究[D].唐山:河北理工学院,2003.
[4]邬虎林,薛向新,沈茂森.包钢烧结矿的化学成分及显微结构对其冶金性能的影响[J].烧结球团,2007,32(2):22.
[5]冯向鹏,李振国,尹海生,等.改善低硅烧结矿冶金性能的研究及实践[J].烧结球团,2004,29(1):1.
[6]许斌,张清岑,李贵奇,等.烧结矿矿物组成、结构与冶金性能的关系[J].烧结球团,1998,23(3):4.
[7]Dawson P R,Ostwald J,Hayes K M.The Inflation of Alumi-na on the Development of Complex Calcium Ferrites in IronOre Sinter[J].Trans Inst Mining Metal/Section C,1995(6):71.
[8]郭兴敏,朱利,李强,等.高碱度烧结矿的矿物组成与矿相结构特征[J].炼铁,2007,42(1):17.
[9]郭兴敏.烧结过程铁酸钙生成及其矿物学[M].北京:冶金工业出版社,1999.
[10]段祥光,魏国良,王鑫.包钢低硅烧结矿强度解析[J].包钢科技,2006,32(S1):5.
[11]郝志忠,吴胜利,郭卓团,等.包钢低硅烧结工艺优化研究[J].烧结球团,2009,34(3):1.
[12]吴胜利,韩宏亮,姜伟忠.烧结矿中MgO作用机理[J].北京科技大学学报,2009,31(4):428.
[13]蔡玉斌.配碳量对包钢烧结工艺和烧结矿冶金性能的影响[D].沈阳:东北大学,2006.
[14]姜鑫,吴钢生,魏国,等.MgO对烧结工艺及烧结矿冶金性能的影响[J].钢铁,2006,41(3):8.
[15]张玉柱,冯向鹏,李振国,等.改善低硅烧结矿冶金性能的研究及实践[J].烧结球团,2004,29(1):4.