Consolidation and reduction behaviour of pellets with sea sand vanadium titanomagnetite: a microscopic interpretation of macroscopic properties

IF 1.7 3区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING

Ironmaking & Steelmaking Pub Date : 2022-12-25 DOI:10.1080/03019233.2022.2156707

Zhenxing Xing, Zhuang Huang, Gongjin Cheng, Han Yang, Xiangxin Xue

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引用次数: 2

Abstract

ABSTRACT The compressive strength of pellets is of great significance for the evaluation of pellets quality indexes. In this paper, the chemical composition, mineral phase composition and microstructure of pellets were analyzed by ICPAES, XRD, OM and SEM-EDS through oxidation roasting and gas-based reduction experiments. The effect mechanism of thermal regulation on the compressive strength and reduction performance of pellets was explained by the micro-indicators such as porosity, Vickers hardness and morphological structure of pellets. The results showed that with the increase of the roasting temperature and the extension of the roasting time, the internal porosity of the oxidized pellets was reduced, while the compressive strength of the pellets was continuously improved, and the roasting temperature had a greater influence on the compressive strength. However, the increase in porosity of the reduced pellets weakened the intergranular bonding between the particles, which led to a reduction in compressive strength.

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含海砂钒钛磁铁矿球团的固结和还原行为:宏观性质的微观解释

球团的抗压强度对球团质量指标的评价具有重要意义。本文通过氧化焙烧和气基还原实验，采用ICPAES、XRD、OM和SEM-EDS分析了球团的化学组成、矿物相组成和微观结构。从孔隙率、维氏硬度和球团形态结构等微观指标分析了热调节对球团抗压强度和还原性能的影响机理。结果表明:随着焙烧温度的升高和焙烧时间的延长，氧化球团的内部孔隙率降低，同时球团的抗压强度不断提高，且焙烧温度对球团抗压强度的影响较大;然而，孔隙率的增加削弱了颗粒之间的颗粒间结合，导致抗压强度降低。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Ironmaking & Steelmaking 工程技术-冶金工程

CiteScore

3.70

自引率

9.50%

发文量

125

审稿时长

2.9 months

期刊介绍： Ironmaking & Steelmaking: Processes, Products and Applications monitors international technological advances in the industry with a strong element of engineering and product related material. First class refereed papers from the international iron and steel community cover all stages of the process, from ironmaking and its attendant technologies, through casting and steelmaking, to rolling, forming and delivery of the product, including monitoring, quality assurance and environmental issues. The journal also carries research profiles, features on technological and industry developments and expert reviews on major conferences.