In hot strip mills, in the steel industry, reheat furnaces are utilized to reheat slabs, billets, blooms, etc., to uniform rolling temperatures prior to hot working. / During this reheating operation, hot steel surfaces react with the in-furnace oxidizing atmosphere resulting in the formation of an iron oxides layer (scale). The yield loss due to this phenomenon depends on furnace operating conditions, i.e. steel temperature, excess combustion air, steel residence time in the furnace, etc., and ranges between 1.5 to 3% of reheated steel. / In this research, the oxidation of a mild steel during reheating cycles as function of furnace atmosphere, steel residence time in the furnace and steel temperature was investigated. / It has been found that scale formation was most sensitive to oxygen levels in the furnace, steel residence time and temperature. A saving of up to 35% of steel lost to scale was achieved by reducing the excess air in the furnace from 70% to 20%. Also, longer residence time and higher temperatures of the steel in the furnace resulted in the formation of excessive amounts of scale.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.61103 |
| Date | January 1992 |
| Creators | Abuluwefa, Husein |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Engineering (Department of Mining and Metallurgical Engineering.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001291818, proquestno: AAIMM74709, Theses scanned by UMI/ProQuest. |
Page generated in 0.0018 seconds