The Effect of Composition Change on Porosity in a Packed Bed on its Softening Process

다국어 초록 (Multilingual Abstract)

To understand structural change on softening and melting in the ore layers, the cold experimentation in the laboratory scale is conducted to simulate the effect of temperature, pressure and material composition on softening using cylindrical packed bed of wax particles. The particular study of the effect of composition change on cohesive layer is described in this paper. The cohesive layer is configured by sinter, pellet or lumpy ore. To simulate the bed composition change of the ironbearing materials, two types of wax packed bed are studied: a mixture bed (the 55-grade and 60-grade of wax balls are physically mixed to form the bed) and a blend bed (the two grades of wax are melted together to make the balls for the bed). The bed shrinkage behavior is mathematically described by creep deformation theory. It is found that a blend bed has a faster creep deformation rate than a mixture bed. Also the porosity reduction behavior of a packed bed is not a simple average of the individual components of the bed. Moreover, a mixture bed maintains a better porous structure than a blend bed under a given operational condition.

목차 (Table of Contents)

• ABSTRACT
• 1. Introduction
• 2. Experiment
• 3. Results and Discussion
• 4. Conclusions
• Acknowledgment
• References