
总第258期 2017年第6期
河北冶金 HEBEIMETALLURGY
添加铁矿粉对焦炭
机械强度及反应性的影响
孙晓伟,陈申伟,郭瑞,谢全安
(华北理工大学化学工程学院,河北唐山063009)
Total No. 258 2017,Number6
摘要:炼焦煤中添加不同粒度、比例及成分的铁矿粉制备高反应性焦炭,测定焦炭的转鼓强度、等温与非等温气化反应参数,综合评定添加催化剂对高反应性焦炭机械强度和气化反应的影响。配入铁矿粉后焦炭的机械强度有不同程度的下降,当添加比例小于10%时.焦炭的机械强度变化幅度较小:大于10% 时,焦炭的机械强度大幅度下降;添加铁矿粉的成分和粒度均对焦炭机械强度有较大影响。添加铁矿粉的比例处于容惰范围内时,增加添加铁矿粉的比例、添加高品位铁矿粉或适当地减小添加铁矿粉的粒度
均有利于降低焦炭的起始反应温度、提高低温反应指数。关键词:铁矿粉;焦炭;机械强度;反应性;影响
中图分类号:TF526
文献标志码:A
doi:10. 13630/j. cnki13 1172.2017. 0603
文章编号:10065008(2017)06001304
EFFECTOFIRONOREPOWDERADDITIONON
MECHANICALSIRENGTHANDREACTTVTTYOFCOKE
SunXiaowei,Chen Shenwei,GuoRi,XieQuanan
(School of Chemical Engineering, North China U niversity of Science and Technology, Tangshan, Hebei, 063009)
Astract: Iron ore powder with different particle size, propo rtion and composition is added into the coking coal to prepare high reactivity coke.The drum strength, isothermal and non isothermal gasification reaction parameters are determined in order to comprehensively evaluate the effect of adding iron ore on the mechani-cal strength and gasification reaction of high reactivity coke. The mechanical strength of coke has different degree drop with the addition of iron ore powder . When the adding ratio is less than 10% , the mechanical strength of coke has a less change; while the adding ratio is more than 10% , the mechanical strength of coke was greatly decreased. The composition and size of powder iron ore all have a great influence on the mechanicalstrength of coke. When the proportion of iron ore is within the tolerance limit, increasing the pro portion of iron ore, adding high grade iron ore powder or reducing the particle size of iron ore all are benefi-
cial to reduce the initial reaction temperature and raise the low temperature reaction index of coke. Key Words : iron ore powder; coke; mechanical strength; reactivity; influence
引言 0
随着科技的飞速发展,资源短缺、环境污染等问题日益突出,节能减排成为当今社会进步发展的重要前提。炼铁工作者通过改进技术、研究新工艺等一系列手段来节省并提高资源的利用率,这些收稿日期;2017-03-27
作者简介:孙晓伟(1992-),男,华北理工大学在读研究生,从事煤化工技术研究,Email983401562@qq.com
通讯作者:郭瑞(1985-),男,工学博士,讲师,主要从事煤化工方面的研究和教学工作,E-mail;rayku@126.com
万方数据
研究[2-4]的进行,极大地推动了钢铁冶炼过程的基础研究,从而使人们对高炉焦炭的性质和原料结构有了新的认识。近些年有学者提出使用高反应性焦炭可降低高炉内保存带的温度,增加还原反应的驱动力,加速矿石还原,减少炼铁过程中所需的还原材料,降低CO2的排放[3]。2003年在日本北海制铁所室兰2#高炉进行了高反应性焦炭冶炼试验,高炉中试用的结果也表明,使用高反应性焦炭后,高炉还原剂的消耗明显降低“」。
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