兰炭作烧结燃料对烧结矿冶金性能的影响

杨双平,郭拴全,张攀辉,周江峰,王 苗

钢铁 ›› 2016, Vol. 51 ›› Issue (9) : 16-21.

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钢铁 ›› 2016, Vol. 51 ›› Issue (9) : 16-21. DOI: 10.13228/j.boyuan.issn0449-749x.20160069
原料与炼铁

兰炭作烧结燃料对烧结矿冶金性能的影响

  • 杨双平,郭拴全,张攀辉,周江峰,王 苗
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Influence of semi-coke used as sintering fuel on metallurgical properties of sinter

  • 杨双平,郭拴全,张攀辉,周江峰,王 苗
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摘要

通过烧结杯试验、烧结矿荷重软化试验、烧结矿还原度试验及烧结矿低温还原粉化试验,系统地研究了兰炭用作烧结燃料对烧结矿冶金性能的影响。结果表明,兰炭的配加、碱度的增加对烧结矿的成品率、品位和转鼓指数及粒度并未产生明显的负面影响;兰炭加入比例为30%、碱度为1.82时,可以提高烧结矿的转鼓强度,此时的烧结矿软化性能也最好;随着兰炭替代比例的升高,烧结矿碱度逐渐增加,导致烧结矿中FeO质量分数逐渐下降,这对烧结矿还原性和低温还原粉化具有一定的改善作用。综合考虑兰炭和碱度对烧结过程及烧结矿冶金性能的影响,用兰炭作为烧结燃料在工艺上是可行的,而且兰炭加入比例为30%、碱度为1.82时效果最佳。

Abstract

Semi-coke used as sintering fuel was studied through the sintering cup experiment, sinter load softening experiments, sinter reduction test and low-temperature sinter reduction powder experiment. Emphasis was mainly focused on the influence of semi-coke substitution ratio on sinter metallurgical properties. The result shows that, the addition of semi-coke and the increase of basicity do not have obvious negative impact on the sinter yield, grade, the drum index and grain size. When the content of semi-coke is 30% and the basicity is 1.82, the drum strength as well as the softening property of sinter can improve. In addition, with the increase of semi-coke replacement ratio, the sinter basicity increases, leading to a decrease of the FeO content in sinter which is helpful for the sinter reducibility and low-temperature reduction disintegration. Considering the roles of semi-coke and alkalinity in sintering process and the influence of sinter metallurgical properties, the application of semi-coke as fuel in sintering process is feasible, and the optimum condition is 30% addition of semi-coke and the basicity of 1.82.

关键词

关键词:烧结 / 兰炭 / 替代比例 / 转鼓强度 / 冶金性能

Key words

Key words: sintering / semi-coke / substitution ratio / tumbler strength / metallurgical property

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导出引用
杨双平, 郭拴全, 张攀辉, . 兰炭作烧结燃料对烧结矿冶金性能的影响[J]. 钢铁, 2016, 51(9): 16-21 https://doi.org/10.13228/j.boyuan.issn0449-749x.20160069
YANG Shuang-Beng, GUO Quan-Quan, ZHANG Pan-Hui, et al. Influence of semi-coke used as sintering fuel on metallurgical properties of sinter[J]. Iron and Steel, 2016, 51(9): 16-21 https://doi.org/10.13228/j.boyuan.issn0449-749x.20160069
中图分类号: A   

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