Studies on characterization of properties of low-grade hematite iron ores and their fired pellets

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

Ironmaking & Steelmaking Pub Date : 2023-03-01 DOI:10.1080/03019233.2023.2180930

Avula Leela Sukh Brahma Reddy, S. Sahoo, Mithilesh Kumar

引用次数: 1

Abstract

ABSTRACT In this study, pellets were made from iron ores of Ramallakota and Veldurthi mines, Andhra Pradesh, by the addition of 1.5 to 4.5 wt.% of bentonite and molasses binders. Dried iron ore pellets were fired at 1173, 1373 and 1573K for 1, 2 and 3h. The aim has been to determine the effects of type of iron ore and binder, and firing conditions on the properties of resulting fired pellets. Chemical compositions and XRD patterns of studied iron ores revealed them to be of low- grade hematite iron ores having 27–46% Fe. Drop number of dried pellets got increased with an increase in their binder contents. Both the types of fired iron ore pellets exhibited an increase in their crushing strengths and decrease in apparent porosity with rise of firing temperature and time due to an increase in the extent of sintering of particles, as revealed by SEM micrographs.

查看原文本刊更多论文

低品位赤铁矿及其烧结球团的性质研究

在本研究中，以安得拉邦Ramallakota和Veldurthi矿的铁矿石为原料，添加1.5% ~ 4.5%的膨润土和糖蜜粘结剂制成球团。干燥的铁矿石球团在1173、1373和1573K下焙烧1、2和3h。其目的是确定铁矿石和粘结剂的类型以及燃烧条件对所产生的烧结球团性能的影响。矿石的化学成分和XRD分析表明，该矿石为低品位赤铁矿，铁含量为27 ~ 46%。随着粘结剂含量的增加，干燥球团滴数增加。SEM显微图显示，随着烧结温度和时间的增加，两种类型的烧结铁球团的破碎强度都有所增加，表观孔隙率也有所降低，这是由于颗粒烧结程度的增加。

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分钟内获得全文求助全文

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.