Efficient Separation of Iron and Alumina in Red Mud Using Reduction Roasting and Magnetic Separation

IF 1.5 4区 工程技术 Q3 METALLURGY & METALLURGICAL ENGINEERING Mining, Metallurgy & Exploration Pub Date : 2024-05-02 DOI:10.1007/s42461-024-00990-8
Hongyang Wang, Yuqi Zhao, Zhiyong Lin, Leiting Shen
{"title":"Efficient Separation of Iron and Alumina in Red Mud Using Reduction Roasting and Magnetic Separation","authors":"Hongyang Wang, Yuqi Zhao, Zhiyong Lin, Leiting Shen","doi":"10.1007/s42461-024-00990-8","DOIUrl":null,"url":null,"abstract":"<p>Gibbsite-type bauxite is the main material for alumina extraction by Bayer process globally, while the iron in red mud is difficult to use for the high alumina content. Therefore, the efficient separation of iron and alumina is the premise for the resource utilization of red mud. In this work, the separation of iron and alumina in red mud containing 47.45% Fe and 11.58% Al<sub>2</sub>O<sub>3</sub> was studied through reduction roasting followed by magnetic separation. The analysis methods of XRD, VSM, SEM, and EDS were used to investigate the phase transformation of red mud during reduction roasting. Results show that hematite can be firstly reduced into magnetite, and alumogoethite into magnetite and alumina. Then, the magnetite reduction undergoes the process of Fe<sub>3</sub>O<sub>4</sub>→FeO→Fe, while alumina can react with FeO to form hercynite. The hercynite is ultimately reduced into metallic iron and alumina at elevated temperature. The specific saturation magnetization of reduced product is closely related to its main minerals, that is, the specific saturation magnetization of magnetite and metallic iron is higher than that of wustite and hercynite. The mass ratio of Fe to Al<sub>2</sub>O<sub>3</sub> in magnetic concentrate increases with roasting temperature, from 4.55 at 600 °C to 10.27 at 1200 °C. Therefore, efficient separation of iron and alumina in red mud could be achieved through deep reduction-magnetic separation.</p>","PeriodicalId":18588,"journal":{"name":"Mining, Metallurgy & Exploration","volume":"17 1","pages":""},"PeriodicalIF":1.5000,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Mining, Metallurgy & Exploration","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1007/s42461-024-00990-8","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"METALLURGY & METALLURGICAL ENGINEERING","Score":null,"Total":0}
引用次数: 0

Abstract

Gibbsite-type bauxite is the main material for alumina extraction by Bayer process globally, while the iron in red mud is difficult to use for the high alumina content. Therefore, the efficient separation of iron and alumina is the premise for the resource utilization of red mud. In this work, the separation of iron and alumina in red mud containing 47.45% Fe and 11.58% Al2O3 was studied through reduction roasting followed by magnetic separation. The analysis methods of XRD, VSM, SEM, and EDS were used to investigate the phase transformation of red mud during reduction roasting. Results show that hematite can be firstly reduced into magnetite, and alumogoethite into magnetite and alumina. Then, the magnetite reduction undergoes the process of Fe3O4→FeO→Fe, while alumina can react with FeO to form hercynite. The hercynite is ultimately reduced into metallic iron and alumina at elevated temperature. The specific saturation magnetization of reduced product is closely related to its main minerals, that is, the specific saturation magnetization of magnetite and metallic iron is higher than that of wustite and hercynite. The mass ratio of Fe to Al2O3 in magnetic concentrate increases with roasting temperature, from 4.55 at 600 °C to 10.27 at 1200 °C. Therefore, efficient separation of iron and alumina in red mud could be achieved through deep reduction-magnetic separation.

Abstract Image

查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
利用还原焙烧和磁分离高效分离赤泥中的铁和氧化铝
吉布斯特型铝土矿是全球拜耳法提取氧化铝的主要原料,而赤泥中的铁因氧化铝含量高而难以利用。因此,高效分离铁和氧化铝是赤泥资源化利用的前提。本研究通过还原焙烧法和磁选法研究了含铁 47.45% 和 Al2O3 11.58% 的赤泥中铁和氧化铝的分离。采用 XRD、VSM、SEM 和 EDS 等分析方法研究了赤泥在还原焙烧过程中的相变。结果表明,赤铁矿可首先还原成磁铁矿,铝镁土可还原成磁铁矿和氧化铝。然后,磁铁矿还原成 Fe3O4→FeO→Fe 的过程,而氧化铝可与 FeO 反应生成蛭石。在高温下,hercynite 最终会还原成金属铁和氧化铝。还原产物的比饱和磁化率与其主要矿物密切相关,即磁铁矿和金属铁的比饱和磁化率高于乌云母和蛭石。磁性精矿中铁与 Al2O3 的质量比随着焙烧温度的升高而增加,从 600 °C 时的 4.55 增加到 1200 °C 时的 10.27。因此,可通过深度还原-磁选实现赤泥中铁和氧化铝的高效分离。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 去求助
来源期刊
Mining, Metallurgy & Exploration
Mining, Metallurgy & Exploration Materials Science-Materials Chemistry
CiteScore
3.50
自引率
10.50%
发文量
177
期刊介绍: The aim of this international peer-reviewed journal of the Society for Mining, Metallurgy & Exploration (SME) is to provide a broad-based forum for the exchange of real-world and theoretical knowledge from academia, government and industry that is pertinent to mining, mineral/metallurgical processing, exploration and other fields served by the Society. The journal publishes high-quality original research publications, in-depth special review articles, reviews of state-of-the-art and innovative technologies and industry methodologies, communications of work of topical and emerging interest, and other works that enhance understanding on both the fundamental and practical levels.
期刊最新文献
Prediction of Backbreak in Surface Production Blasting Using 3-Dimensional Finite Element Modeling and 3-Dimensional Nearfield Vibration Modeling Improving Feldspar Flotation Using CTAB As Amine Collector (Part Two) Research on Vibrating Screen Screening Technology and Method Based on DEM: a Review Slope Stability Analysis of Opencast Mine Dump using the Limit Equilibrium Method—a Case Study Spatial Clustering of Primary Geochemical Halos Using Unsupervised Machine Learning in Sari Gunay Gold Deposit, Iran
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1