The use of iron ore fines in cold-bonded self-reducing composite pellets

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dc.contributor.advisor Garbers-Craig, Andrie Mariana
dc.contributor.postgraduate Nikai, Innocent
dc.date.accessioned 2016-11-15T06:31:27Z
dc.date.available 2016-11-15T06:31:27Z
dc.date.created 2016-09-01
dc.date.issued 2016
dc.description Dissertation (MSc)--University of Pretoria, 2016. en_ZA
dc.description.abstract The feasibility of producing Direct Reduced Iron from cold-bonded self-reducing composite pellets made from Anglo American Kumba Iron Ore Sishen upgraded slimes was considered on laboratory scale. Composite pellets were made by mixing Sishen upgraded slimes, coke and different binders using a pelletizing disc by addition of moisture. Binders investigated were dextrin, carboxymethylcellulose, calcium-lignosulphonate and combination of dextrin and bentonite. Dry strengths in excess of 300 N /pellet were attained by curing the pellets under ambient conditions. Dry strength of composite pellets increased with increase in binder quantity and decreased with increase in coke quantity. The composite pellets reduced within 20 minutes to degrees of metallisation in excess of 90 % at 1100 oC, with decrepitation indices significantly below 5 %. The degree of metallisation of composite pellets increased with an increase in reduction temperature (from 1000 to 1100 oC), reduction time (20 vs. 40 minutes) and coke quantity (15 vs. 20 wt. %). Carboxymethylcellulose was identified as the most economical and suitable binder for the Sishen upgraded slimes. en_ZA
dc.description.availability Unrestricted en_ZA
dc.description.degree MSc en_ZA
dc.description.department Materials Science and Metallurgical Engineering en_ZA
dc.description.sponsorship Anglo American Kumba Iron Ore and the National Research Foundation of South Africa (Grant number TP2009072800103) en_ZA
dc.identifier.citation Nikai, I 2016, The use of iron ore fines in cold-bonded self-reducing composite pellets, MSc Dissertation, University of Pretoria, Pretoria, viewed yymmdd <http://hdl.handle.net/2263/58064>
dc.identifier.other S2016
dc.identifier.uri http://hdl.handle.net/2263/58064
dc.publisher University of Pretoria
dc.rights © 2016 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. en_ZA
dc.subject Ironmaking en_ZA
dc.subject UCTD
dc.title The use of iron ore fines in cold-bonded self-reducing composite pellets en_ZA
dc.type Dissertation en_ZA


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