AGGLOMERATION OF IRON-BEARING FINES: SELECTION OF THE BINDER FOR OPTIMAL BRIQUETTE STRENGTH UNDER VARIOUS ENVIRONMENTS

1 LANZERSTORFER Christof
Co-authors:
2 BRUNNER Christian
Institutions:
1 University of Applied Sciences Upper Austria, Wels, Austria, EU, c.lanzerstorfer@fh-wels.at
2 Primetals Technologies Austria GmbH, ECO TI, Linz, Austria, EU, christian.a.brunner@primetals.com
Conference:
29th International Conference on Metallurgy and Materials, Brno, Czech Republic, EU, May 20 - 22, 2020
Proceedings:
Proceedings 29th International Conference on Metallurgy and Materials
Pages:
31-36
ISBN:
978-80-87294-97-0
ISSN:
2694-9296
Published:
27th July 2020
Proceedings of the conference have been sent to Web of Science and Scopus for evaluation and potential indexing.
Metrics:
23 views / 8 downloads
Abstract

In the production of hot briquetted iron some fine by-product is generated. This material consists mainly of metallic iron and iron oxides. Before utilization of these fines in the steel mill and/or direct reduction plant, agglomeration is required. To get briquettes with sufficient strength a binder has to be added to the fines. In this study, the various binders, ranging from bentonite, molasses plus hydrated lime and starch were used in the preparation of the briquetting feed. For evaluation of the different binders, the compressive strength of the briquettes was measured. Before testing, the briquettes were stored under different ambient conditions (temperature, humidity). The results showed large differences in briquette strength depending on the used binder. Additionally, the performance of the binders was strongly dependent on the storage conditions. Thus, before the selection of an optimal binder, the relevant ambient conditions for the briquettes have to be defined.

Keywords: Iron fines, briquetting, binder, compressive strength
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