Portal de Periódicos da CAPES

Attrition of coal ash particles in a fluidized bed

1991; Elsevier BV; Volume: 66; Issue: 1 Linguagem: Inglês

10.1016/0032-5910(91)80079-x

1873-328X

J.J. Pís, Antonio B. Fuertes, V. Artos, Ana Beatriz García Suárez, F. Rubiera,

Iron and Steelmaking Processes

In this work, an attrition study has been carried out using a fluidized bed of coal ash. Experiments were carried out in a cold fluidized bed 0.14 m in diameter and 2.20 m in height. The effect on attrition of the following variables has been studied: bed particle size, static height of bed, time of attrition and fluidizing velocity. It was concluded that attrition is mainly due to abrasion, resulting in the removal of fines of a size smaller than 50 μm. The size distribution of fines produced is independent of the original particle sizes. The attrition rate varies linearly with the parameter (U – Uo). It was observed that the variation of the static bed height has no effect on the attrition rate under steady-state conditions.