高铁赤泥涡流熔融还原提铁中试扩大试验  

Pilot test of recovery of iron from highiron red mud by vortex smelting reduction

作　　者：李晓飞 张廷安 吕国志[1,2] 王坤 王松[1,2] LI Xiaofei;ZHANG Ting'an;LYU Guozhi;WANG Kun;WANG Song(School of Metallurgy,Northeastern University,Shenyang 110819,China;Key Laboratory of Ecological Metallurgy of Multimetal Intergrown Ores of Ministry of Education,Shenyang 110819,China;CHINALCO Southeast Materials Institute(Fujian)Technology Co.Ltd.,Fuzhou 350002,China)

机构地区：[1]东北大学冶金学院,辽宁沈阳110819 [2]东北大学多金属共生矿生态化冶金教育部重点实验室,辽宁沈阳110819 [3]中铝东南材料院(福建)科技有限公司,福建福州350002

出　　处：《中国有色冶金》2024年第2期42-48,共7页China Nonferrous Metallurgy

基　　金：国家自然科学基金(52204419);辽宁省自然科学基金(2022-BS-076);广西科技重大专项(2021AA12013);江西省“双千计划”(S2021DQKJ2198)。

摘　　要：高铁赤泥中氧化铁含量在30%以上,是重要的铁资源来源。为了规模化、资源化、无害化消纳高铁赤泥,作者所在课题组在实验室进行了高铁赤泥涡流熔融还原试验,并得到了最佳工艺参数。本文在实验室研究基础上进行了中试扩大试验,采用工业试剂替代了实验室分析纯试剂,取得了较好的效果。在试验温度1500℃、配碳比1.3、保温时间30 min、搅拌转速125 r/min、碱度1.0、氟化钙添加量为氧化钙添加量的10%的试验条件下,可回收赤泥中97.12%的铁;获得的生铁产品中磷和硫的含量低,成分满足炼钢用生铁国标L03的要求;还原渣中的主要物相为钙铝黄长石、钛酸钙和霞石,是生产水泥熟料的有效组分。该中试放大试验为工业大规模应用提供了相关数据参考,有利于实现高铁赤泥的规模化资源化利用。目前该生产采用间歇式生产模式,未来可通过设计连续式反应装置实现连续加料、连续出渣和出铁。The iron oxide content of highiron red mud is more than 30%,which is an important source of iron resources.In order to realize the largescale,resourcefulness,and harmless utilization of highiron red mud,a pilotscale experiment on vortex smelting reduction of highiron red mud was conducted in this paper on the basis of laboratory research.The pilot study achieved good resultswith the use of industrial reagents instead of analytically pure laboratory reagents.The iron recovery was 97.12%under the experimental conditions of the experimental temperature of 1500℃,the carbon ratio of 1.3,the holding time of 30 minutes,the stirring speed of 125 r/min,the alkalinity of 1.0,and the amount of calcium fluoride was 10%of the amount of calcium oxide.The content of P and S in the pig iron was low,which can meet the requirements of the national standard L03 for steelmaking.The main phases in the reduction slag are gehlenite,calcium titanate,and nepheline,which are effective components for cement clinker production.The pilotscale experiment on vortex smelting reduction of highiron red mud can provide relevant data for largescale industrial applications and has great guiding significance.Currently the production is in intermittent mode.In the future,continuous charging,continuous slagging and iron production can be realized by designing a continuous reaction unit.

关 键 词：高铁赤泥 涡流熔融还原 生铁 中试试验 赤泥消纳 资源化利用 

分 类 号：X758[环境科学与工程—环境工程] TF557[冶金工程—钢铁冶金]