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Formation and sintering of vanadium carbonitride
Dissertation (MSc Applied Science (Metallurgy))--University of Pretoria, 2020.
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| Format: | Thesis |
| Language: | English |
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University of Pretoria
2020
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| _version_ | 1867613568234422272 |
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| access_status_str | Open Access |
| author2 | Cromarty, Robert |
| author_browse | Cromarty, Robert |
| author_facet | Cromarty, Robert |
| collection | Thesis |
| dc_rights_str_mv | © 2019 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 Applied Science (Metallurgy))--University of Pretoria, 2020. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/75832 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:38:12.930Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2020 |
| publishDateRange | 2020 |
| publishDateSort | 2020 |
| 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:2263/75832 Formation and sintering of vanadium carbonitride Cromarty, Robert james.ferreira.up@gmail.com Ferreira, James Henry UCTD Metallurgy Vanadium carbonitride Sintering Shaft furnace Agglomeration Furnace bridging Plug formation 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 Dissertation (MSc Applied Science (Metallurgy))--University of Pretoria, 2020. Vanadium carbonitride is commonly used in the steel making industry to improve the mechanical properties of steel. It is produced by the reduction reaction of vanadium trioxide (V2O3) or vanadium pentoxide (V2O5) with carbon in a nitrogen atmosphere. Vanadium carbonitride can successfully be produced in an induction heated shaft furnace. Some briquettes have difficulty moving down the furnace during the industrial production of vanadium carbonitride in a shaft furnace. Solid plugs form in the furnaces from time to time and have a negative influence on furnace productivity. In this study, the formation of vanadium carbonitride was investigated using a series of laboratory furnaces. In all the test work conducted, V2O3 and carbon were used as the basis for the starting material. The influence of factors such as temperature, retention time, pressure and feed material purity on the sintering, chemistry and agglomeration of laboratory produced pellets was determined. It was found that, of the variables investigated, reaction temperature had the strongest single effect on the agglomeration of the pellets whereas retention time, load and insoluble impurities had an influence on the bonding strength between the agglomerated pellets. It was concluded that during the production of vanadium carbonitride, a possible combination of factors leads to the formation of plugs in the shaft furnace. An optimal furnace operating temperature of 1200 °C with a retention time of 30 minutes was identified to reduce the occurrence of pellet agglomerations and plug formations. Increased temperatures result in increased concentrations of vanadium and nitrogen and decreased concentrations of oxygen and carbon. Bushveld Vametco Alloys mi2025 Materials Science and Metallurgical Engineering MSc Applied Science (Metallurgy) Unrestricted SDG-09: Industry, innovation and infrastructure SDG-12: Responsible consumption and production 2020-08-21T08:23:22Z 2020-08-21T08:23:22Z 2020-09 2020-02-09 Dissertation Ferreira, JH 2020, Formation and Sintering of Vanadium Carbonitride, MSc Applied Science (Metallurgy) Dissertation, University of Pretoria, Pretoria, viewed yymmdd <http://hdl.handle.net/2263/75832> A2021 http://hdl.handle.net/2263/75832 en © 2019 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 | UCTD Metallurgy Vanadium carbonitride Sintering Shaft furnace Agglomeration Furnace bridging Plug formation 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 Formation and sintering of vanadium carbonitride |
| title | Formation and sintering of vanadium carbonitride |
| title_full | Formation and sintering of vanadium carbonitride |
| title_fullStr | Formation and sintering of vanadium carbonitride |
| title_full_unstemmed | Formation and sintering of vanadium carbonitride |
| title_short | Formation and sintering of vanadium carbonitride |
| title_sort | formation and sintering of vanadium carbonitride |
| topic | UCTD Metallurgy Vanadium carbonitride Sintering Shaft furnace Agglomeration Furnace bridging Plug formation 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 |
| url | http://hdl.handle.net/2263/75832 |