Effect of Bottom Bubbling Conditions on Surface Reaction Rate in Oxygen-Water System

Maruoka, Nobuhiro and Lazuardi, Felicia and Nogami, Hiroshi and Gupta, Govind Sharan and Kitamura, Shin-ya (2010) Effect of Bottom Bubbling Conditions on Surface Reaction Rate in Oxygen-Water System. In: ISIJ International, 50 (1). pp. 89-94.

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Abstract

In secondary steelmaking, the enhancement of the reaction rate in the low carbon period during the decarburization of steel is considered the most effective method to produce ultralow carbon steel. In a previous study, it was revealed that the surface reaction is dominant during the final stage of the actual refining process. In order to improve the surface reaction rate, it is necessary to enlarge the reaction region, which is usually achieved by increasing the plume eye area. In this study, water model experiments were carried out to estimate the influence of bottom stirring conditions on the gas-liquid reaction rate; for this purpose, the deoxidation rate during the bottom bubbling process was measured. Five types of nozzle configurations were used to study the effect of the plume eye area on the reaction rate at various gas flow rates. The results reveal that the surface reaction rate is influenced by the gas flow rate and the plume eye area. An empirical correlation was developed for the reaction rate and the plume eye area. This correlation was applied to estimate the gas-liquid reaction rate mat the bath surface.

Item Type:	Journal Article
Publication:	ISIJ International
Publisher:	Japan Science and Technology Information Aggregator, Electronic
Additional Information:	Copyright of this article belongs to Japan Science and Technology Information Aggregator, Electronic.
Keywords:	water model experiment; secondary steelmaking; ultralow carbon steel; plume eye area; reaction rate; surface reaction
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	12 Mar 2010 07:50
Last Modified:	19 Sep 2010 05:55
URI:	http://eprints.iisc.ac.in/id/eprint/25834

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