Utilization of micro-fines in sinter making and its implications on bed permeability and sinter quality

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

Ironmaking & Steelmaking Pub Date : 2023-02-05 DOI:10.1080/03019233.2022.2163532

C. Biswas, Arnab Swarnakar, A. Majumder

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引用次数: 1

Abstract

ABSTRACT Exploiting low-grade resources and raw material fines is a challenge for metallurgists developing new technologies. Iron-bearing and carbonaceous by-products are generated by ironmaking and steelmaking units and fed into the sinter plant. These by-products, which have varying proportions of ultra-fines, balling properties, moisture retention capacities, and so on, have a significant impact on sinter quality when used in sinter green mixtures. This study investigates the use of micro-fines and how it affects sinter quality while keeping operational factors such as moisture addition, balling index, and bed permeability in mind. In addition, the ideal moisture addition is investigated using higher micro-fines bearing dusts/sludges of various iron-bearing materials. The presence of columnar SFCA (Silico-ferrite of Calcium and Aluminium) is revealed by microscopic examination of the sinter produced with higher micro fines and good permeability, which improves the Reduction Degradation Index. It was also demonstrated that using more micro-fines in the blend and maintaining consistent moisture addition reduced the amount of return sinter produced.

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微粉在烧结中的应用及其对床层渗透性和烧结质量的影响

摘要开发低品位资源和原料细粒是冶金学家开发新技术的挑战。含铁和含碳副产品由炼铁和炼钢装置产生，并送入烧结厂。这些副产品具有不同比例的超细粉、成球性能、保湿能力等，在用于烧结生坯混合物时对烧结质量有重大影响。本研究调查了超细粉的使用及其如何影响烧结质量，同时考虑了水分添加、成球指数和床层渗透性等操作因素。此外，使用各种含铁材料的含尘/污泥的细粒度较高的情况下，对理想的水分添加进行了研究。通过对烧结矿的微观检查，发现了柱状SFCA（钙铝硅铁氧体）的存在，该烧结矿具有更高的细粒度和良好的渗透性，提高了还原降解指数。研究还表明，在混合物中使用更多的微粉并保持一致的水分添加可以减少返回烧结矿的产量。

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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.