期刊
MINERAL PROCESSING AND EXTRACTIVE METALLURGY REVIEW
卷 37, 期 1, 页码 42-48出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/08827508.2015.1104506
关键词
self-reducing composite pellets; organic binder; direct reduced iron; cold-bonding; Beneficiated iron ore slime
资金
- Anglo American Kumba Iron Ore
- National Research Foundation of South Africa [TP2009072800103]
The feasibility of producing direct reduced iron from cold-bonded, self-reducing composite pellets, constituted from beneficiated iron ore slime, coke, and different binders (dextrin, bentonite, calcium lignosulfonate, and carboxymethyl-cellulose [CMC]) was studied. This was done using a design of experiments approach. It was found that as-received beneficiated iron ore slime is suitable as a raw material for the production of self-reducing composite pellets with carboxymethylcellulose as the most suitable binder. Dry strengths in excess of 300 N/pellet were attained by curing the pellets under ambient conditions. The composite pellets reduced within 20 min to degrees of metallization in excess of 90% at 1100 degrees C, with decrepitation indices significantly below 5%. The degree of metallization of composite pellets increased with an increase in reduction temperature (from 1000 to 1100 degrees C), reduction time (20 min. vs. 40 min), and coke quantity (15% vs. 20%). CMC was identified as the most economical and suitable binder for the Sishen concentrate.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据