2014-Sustainable Industrial Processing Summit
SIPS 2014 Volume 3: Non-ferrous & Iron_Steel
| Editors: | Kongoli F |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2014 |
| Pages: | 522 pages |
| ISBN: | 978-1-987820-05-8 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Experimental Evaluation and Empirical Modeling for Rheological Behavior of Dual-phase Fluids
Tomoyuki Higo1; Sohei Sukenaga2; Noritaka Saito1; Kunihiko Nakashima1;1KYUSHU UNIVERSITY, Fukuoka, Japan; 2TOHOKU UNIVERSITY, Sendai, Japan;
Type of Paper: Regular
Id Paper: 358
Topic: 4
Abstract:
Rheological behavior of solid-particle and/or gas-phase containing slag is one of the most important physical and transport characteristics for understanding and optimization of steel making process, which has direct influence on kinetics of slag-metal reactions at elevated temperature. Therefore, experimental and theoretical approaches to the viscosity of solid-particle (suspension) and/or gas-phase (foam) dispersed molten slag are essential to understand complex phenomena in the steel making process, which have not been reported well so far.
In the present study, the viscosity of simulated slag suspension or foam that consisted of polyethylene beads or N2 gas dispersed silicone oil was systematically investigated as functions of volume fraction and size of the secondary phase, shear rate, and viscosity of silicone oil (liquid phase) at room temperatures. It was found that both relative viscosities of the suspension and foam steeply increased with increasing the volume fractions of the dispersed secondary phase, and with decreasing the sizes of secondary phase, which finally revealed transitions from Newtonian to non-Newtonian fluid (Pseudo-plastic fluid) at certain volume fractions.
In addition, empirical equations that successfully reproduced the viscosity variation of the suspension and foam was proposed by modifying the Einstein-Rosco's equation.