利用炼钢厂废鳞片高效生产硫酸亚铁

IF 2.5 3区 材料科学 Q3 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY
Luana Milak Furmanski, Thuani Gesser Muller, Julia Bortolotto Nuernberg, Monize Aparecida Martins, Ângela Beatriz Coelho Arnt, Marcio Roberto da Rocha, Alexandre Zaccaron, Michael Peterson
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引用次数: 0

摘要

在追求可持续发展的过程中,用于材料开发的废物越来越受到关注。特别是钢厂水垢,它是冶金工业中通过钢钉氧化产生的固体废物,也是研究的重点。在这项调查中,X 射线衍射(XRD)分析确定了武氏体、磁铁矿和赤铁矿为结晶相,而 X 射线荧光分析则显示铁氧化物占重量的 97%,其中约 67% 为铁元素。基于这种成分,通过硫酸水溶液浸出、乙醇过滤和最后的结晶步骤,轧机鳞片可作为七水硫酸亚铁(FeSO4-7H2O)的前驱体。采用因子实验设计优化了 FeSO4-7H2O 的生产,评估了各变量参数(试剂)及其相互作用的影响。最后,评估了碾磨鳞片在生产 FeSO4-7H2O 过程中的潜力、工艺效率和所得材料的质量。与商用 FeSO4-7H2O 样品相比,获得的材料在 XRD 中显示出更高的峰强度,纯度更高(达到 99.83%),在差热分析和热重分析中显示出相似的热行为。利用轧机鳞片生产 FeSO4-7H2O 的收率超过了 70%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Efficient Production of Ferrous Sulfate from Steel Mill Scale Waste

Efficient Production of Ferrous Sulfate from Steel Mill Scale Waste

Waste utilized for material development is increasingly under scrutiny in the pursuit of sustainability. Particularly, steel mill scale, a solid waste generated in the metallurgical industry through the oxidation of steel dowels, is a focus of study. In this investigation, X-ray diffraction (XRD) analysis identified wustite, magnetite, and hematite as crystalline phases, while X-ray fluorescence analysis revealed that iron oxides comprised 97% of the weight, with approximately 67% being elemental iron. Due to this composition, mill scale served as a precursor for ferrous sulfate heptahydrate (FeSO4·7H2O) via a process involving sulfuric acid aqueous solution leaching, ethanol filtration, and a final crystallization step. A factorial experimental design was employed to optimize the production of FeSO4·7H2O, assessing the influence of each variable parameter (reagents) and their interactions. Finally, the potential of mill scale in the production of FeSO4·7H2O, process efficiency, and quality of the resulting material were evaluated. Compared to a sample of commercial FeSO4·7H2O, the obtained material exhibited higher peak intensity in XRD, increased purity (reaching 99.83%), and similar thermal behavior in both differential thermal analysis and thermogravimetry. The yield of the FeSO4·7H2O production process from mill scale exceeded 70%.

Graphical Abstract

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来源期刊
Journal of Sustainable Metallurgy
Journal of Sustainable Metallurgy Materials Science-Metals and Alloys
CiteScore
4.00
自引率
12.50%
发文量
151
期刊介绍: Journal of Sustainable Metallurgy is dedicated to presenting metallurgical processes and related research aimed at improving the sustainability of metal-producing industries, with a particular emphasis on materials recovery, reuse, and recycling. Its editorial scope encompasses new techniques, as well as optimization of existing processes, including utilization, treatment, and management of metallurgically generated residues. Articles on non-technical barriers and drivers that can affect sustainability will also be considered.
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