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 high-iron red mud by vortex smelting reduction
李晓飞 1张廷安 2吕国志 1王坤 1王松1
作者信息
- 1. 东北大学冶金学院,辽宁沈阳 110819;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
- 2. 东北大学冶金学院,辽宁沈阳 110819;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;中铝东南材料院(福建)科技有限公司,福建福州 350002
- 折叠
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1 500 ℃、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.
Abstract
The iron oxide content of high-iron red mud is more than 30％,which is an important source of iron resources.In order to realize the large-scale,resourcefulness,and harmless utilization of high-iron red mud,a pilot-scale experiment on vortex smelting reduction of high-iron 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 1 500 ℃,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 pilot-scale experiment on vortex smelting reduction of high-iron red mud can provide relevant data for large-scale 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Key words
high-iron red mud/vortex smelting reduction/pig iron/pilot study/red mud consumption/resource utilization引用本文复制引用
基金项目
国家自然科学基金(52204419)
辽宁省自然科学基金(2022-BS-076)
广西壮族自治区科技重大专项(2021AA12013)
江西省双千计划(S2021DQKJ2198)
出版年
2024
NETL
NSTL
万方数据