Smelting reduction reactions by solid carbon using induction furnace: foaming behaviour and kinetics of FeO reduction in CaO–SiO2–FeO slag

Autor:	V N Misra, B. Bhoi, Hem Sankar Ray, A K Jouhari
Rok vydání:	2006
Předmět:	Chemistry Mechanical Engineering Metallurgy Kinetics Metals and Alloys Slag Induction furnace Activation energy Redox Surface tension Viscosity Mechanics of Materials visual_art Smelting Materials Chemistry visual_art.visual_art_medium
Zdroj:	Ironmaking & Steelmaking. 33:245-252
ISSN:	1743-2812 0301-9233
DOI:	10.1179/174328106x79994
Popis:	Smelting reduction process technology is progressing rapidly, and research to understand the reduction of FeO in molten slag and the associated foaming behaviour has gained importance. The present paper reports experimental data on the reduction of FeO in molten slag generated in a 30 kW capacity induction furnace. The influence of FeO content in the slag and temperature on the foaming and kinetics is discussed. The foaming index, a parameter describing the travel time of gas in the reactor, is shown to decrease with an increase in the superficial gas velocity. The quantitative dependence of the foaming index on slag properties viscosity, surface tension and density has been studied. The data have also been analysed to give an estimation of the activation energy for the reduction reaction. The reduction reaction, initiated by direct slag–graphite contact, produces CO gas, which spreads into the molten slag bath causing foaming of the slag; further reduction of FeO proceeds mostly via indirect redu...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2cea6a0dc3e94481996bb093224544b6 https://doi.org/10.1179/174328106x79994 Zobrazit plný text záznamu Plný text ve formátu PDF