Interactions of Crucible Materials With an FeOx–SiO2–Al2O3 Melt and Their Influence on Viscosity Measurements

IF 2.4 2区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Metallurgical and Materials Transactions B-Process Metallurgy and Materials Processing Science Pub Date : 2023-10-06 DOI:10.1007/s11663-023-02930-1

Jenny Isaksson, Anton Andersson, Andreas Lennartsson, Caisa Samuelsson

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Abstract

Abstract Viscosity is a critical parameter during metal extraction, influencing the settling of valuable droplets, slag handling, and mass transfer. The viscosity of oxide melts can be measured with high-temperature rheometers. During such measurements, interactions between the crucible and the oxide system can change the chemical composition, melt structure, and thus the viscosity. For increased reliability of viscosity measurements, the influence of crucible and spindle materials on viscosity must be studied. In this study, the viscosity of a synthetic FeO x –SiO 2 –Al 2 O 3 melt was measured using the rotating spindle technique and three different crucible and spindle materials (Mo, Fe, and Ni) to determine the interactions with the melt and the influence on viscosity. The interaction was evaluated by comparing the post-experimental chemical analyses, the Fe/Fe 2+ /Fe 3+ content, visual observations, and using scanning electron microscopy–energy dispersive spectroscopy (SEM–EDS). The results showed that all the crucibles partially dissolved into the melt, affecting the melt structure, composition, and, thus, the viscosities. The viscosity data obtained using the Mo setup interacted the least with the melt, was the most stable, and with the best reproducibility. Graphical Abstract

Abstract Image

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坩埚材料与FeOx-SiO2-Al2O3熔体的相互作用及其对粘度测量的影响

摘要粘度是金属萃取过程中的一个重要参数，影响金属萃取液中有价液滴的沉降、渣的处理和传质。氧化物熔体的粘度可用高温流变仪测量。在这种测量过程中，坩埚和氧化物系统之间的相互作用可以改变化学成分、熔体结构，从而改变粘度。为了提高粘度测量的可靠性，必须研究坩埚和主轴材料对粘度的影响。在这项研究中，使用旋转主轴技术和三种不同的坩埚和主轴材料(Mo, Fe和Ni)测量了合成FeO x - sio2 -Al 2o3熔体的粘度，以确定与熔体的相互作用以及对粘度的影响。通过对比实验后化学分析、Fe/ fe2 + / fe3 +含量、目视观察和扫描电子显微镜-能谱分析(SEM-EDS)来评估相互作用。结果表明，坩埚部分溶解在熔体中，影响了熔体的结构、成分，从而影响了熔体的粘度。使用Mo装置获得的粘度数据与熔体的相互作用最小，最稳定，重现性最好。图形抽象

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来源期刊

Metallurgical and Materials Transactions B-Process Metallurgy and Materials Processing Science 工程技术-材料科学：综合

CiteScore

4.90

自引率

20.00%

发文量

293

审稿时长

4.7 months

期刊介绍： Focused on process metallurgy and materials processing science, Metallurgical and Materials Transactions B contains only original, critically reviewed research on primary manufacturing processes, from extractive metallurgy to the making of a shape. A joint publication of ASM International and TMS (The Minerals, Metals and Materials Society), Metallurgical and Materials Transactions B publishes contributions bimonthly on the theoretical and engineering aspects of the processing of metals and other materials, including studies of electro- and physical chemistry, mass transport, modeling and related computer applications. Articles cover extractive and process metallurgy, pyrometallurgy, hydrometallurgy, electrometallurgy, transport phenomena, process control, physical chemistry, solidification, mechanical working, solid state reactions, composite materials, materials processing and the environment.