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The use of iron ore fines in cold-bonded self-reducing composite pellets
Dissertation (MSc)--University of Pretoria, 2015.
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University of Pretoria
2016
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| _version_ | 1867613479657013248 |
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| access_status_str | Open Access |
| author2 | Garbers-Craig, Andrie Mariana |
| author_browse | Garbers-Craig, Andrie Mariana |
| author_facet | Garbers-Craig, Andrie Mariana |
| collection | Thesis |
| dc_rights_str_mv | © 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. |
| description | Dissertation (MSc)--University of Pretoria, 2015. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/58064 |
| institution | University of Pretoria (South Africa) |
| last_indexed | 2026-06-10T12:36:48.396Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2016 |
| publishDateRange | 2016 |
| publishDateSort | 2016 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/58064 The use of iron ore fines in cold-bonded self-reducing composite pellets Garbers-Craig, Andrie Mariana Nikai, Innocent Ironmaking UCTD Composite pellets Slimes Organic binder Cold-bonding Direct Reduced Iron (DRI) Engineering, built environment and information technology theses SDG-04 SDG-04: Quality education Engineering, built environment and information technology theses SDG-08 SDG-08: Decent work and economic growth Engineering, built environment and information technology theses SDG-09 SDG-09: Industry, innovation and infrastructure Engineering, built environment and information technology theses SDG-12 SDG-12: Responsible consumption and production Engineering, built environment and information technology theses SDG-13 SDG-13: Climate action Dissertation (MSc)--University of Pretoria, 2015. 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. Anglo American Kumba Iron Ore and the National Research Foundation of South Africa (Grant number TP2009072800103) mi2025 Materials Science and Metallurgical Engineering MSc Unrestricted SDG-04: Quality education SDG-08: Decent work and economic growth SDG-09: Industry, innovation and infrastructure SDG-12: Responsible consumption and production SDG-13: Climate action 2016-11-15T06:31:27Z 2016-11-15T06:31:27Z 2016-09-01 2015 Dissertation Nikai, I 2015, 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> S2016 http://hdl.handle.net/2263/58064 © 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. application/pdf University of Pretoria |
| spellingShingle | Ironmaking UCTD Composite pellets Slimes Organic binder Cold-bonding Direct Reduced Iron (DRI) Engineering, built environment and information technology theses SDG-04 SDG-04: Quality education Engineering, built environment and information technology theses SDG-08 SDG-08: Decent work and economic growth Engineering, built environment and information technology theses SDG-09 SDG-09: Industry, innovation and infrastructure Engineering, built environment and information technology theses SDG-12 SDG-12: Responsible consumption and production Engineering, built environment and information technology theses SDG-13 SDG-13: Climate action The use of iron ore fines in cold-bonded self-reducing composite pellets |
| title | The use of iron ore fines in cold-bonded self-reducing composite pellets |
| title_full | The use of iron ore fines in cold-bonded self-reducing composite pellets |
| title_fullStr | The use of iron ore fines in cold-bonded self-reducing composite pellets |
| title_full_unstemmed | The use of iron ore fines in cold-bonded self-reducing composite pellets |
| title_short | The use of iron ore fines in cold-bonded self-reducing composite pellets |
| title_sort | use of iron ore fines in cold bonded self reducing composite pellets |
| topic | Ironmaking UCTD Composite pellets Slimes Organic binder Cold-bonding Direct Reduced Iron (DRI) Engineering, built environment and information technology theses SDG-04 SDG-04: Quality education Engineering, built environment and information technology theses SDG-08 SDG-08: Decent work and economic growth Engineering, built environment and information technology theses SDG-09 SDG-09: Industry, innovation and infrastructure Engineering, built environment and information technology theses SDG-12 SDG-12: Responsible consumption and production Engineering, built environment and information technology theses SDG-13 SDG-13: Climate action |
| url | http://hdl.handle.net/2263/58064 |