HEAT-TRANSFER IN AN IRON BATH OF A 2-STAGE SMELTING REDUCTION PROCESS

Citation
Hw. Gudenau et al., HEAT-TRANSFER IN AN IRON BATH OF A 2-STAGE SMELTING REDUCTION PROCESS, Steel research, 64(8-9), 1993, pp. 372-376
Citations number
26
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Metallurgy & Mining
Journal title
ISSN journal
0177-4832
Volume
64
Issue
8-9
Year of publication
1993
Pages
372 - 376
Database
ISI
SICI code
0177-4832(1993)64:8-9<372:HIAIBO>2.0.ZU;2-A
Abstract
Mechanisms of the heat transfer by means of iron and slag drops in sme lting reduction are discussed. The quantity of slag on the molten iron exists in two forms depending on the different processes: either a th in slag layer or a voluminous slag layer. In the case of a small amoun t of slag, iron and slag drops are spattered in the free space above t he bath furnace. By smelting reduction with a high post-combustion deg ree, the spattered iron drops are quickly oxidized in the free space. The spattered slag drops transfer heat from the free space to the molt en iron. A definition for the heat transfer efficiency in the iron bat h of a two-stage smelting reduction process is presented. Experiments on heat transfer were made in an experimental EOF-furnace with 1 00 kg iron. The post-combustion degree and the heat transfer efficiency wer e on a high level, because inleaked air was used.