Maximizing the Recycling of Iron Ore Pellets Fines Using Innovative Organic Binders

Author:

Manu Karthik12,Mousa Elsayed23ORCID,Ahmed Hesham34ORCID,Elsadek Mohamed34,Yang Weihong1

Affiliation:

1. Department of Material Science and Engineering, KTH Royal Institute of Technology, 100 44 Stockholm, Sweden

2. SWERIM AB, Aronstorpsvägen 1, 974 37 Luleå, Sweden

3. Central Metallurgical Research and Development Institute (CMRDI), Cairo 12422, Egypt

4. MiMeR—Minerals and Metallurgical Engineering, Luleå University of Technology, 971 87 Luleå, Sweden

Abstract

This research work focuses on the practicality of using organic binders for the briquetting of pellet fines. The developed briquettes were evaluated in terms of mechanical strength and reduction behavior with hydrogen. A hydraulic compression testing machine and thermogravimetric analysis were incorporated into this work to investigate the mechanical strength and reduction behavior of the produced briquettes. Six organic binders, namely Kempel, lignin, starch, lignosulfonate, Alcotac CB6, and Alcotac FE14, in addition to sodium silicate, were tested for the briquetting of pellet fines. The highest mechanical strength was achieved using sodium silicate, Kempel, CB6, and lignosulfonate. The best combination of binder to attain the required mechanical strength even after 100% reduction was found to be a combination of 1.5 wt.% of organic binder (either CB6 or Kempel) with 0.5 wt.% of inorganic binder (sodium silicate). Upscaling using an extruder gave propitious results in the reduction behavior, as the produced briquettes were highly porous and attained pre-requisite mechanical strength.

Funder

FORMAS

Publisher

MDPI AG

Subject

General Materials Science

Reference25 articles.

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