a) Effect of coarse limestone in a poorly slag formation generating a weak-porous structure; B) Effect of size distribution of limestone in pellets porosity.

1. (a)
(b)
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Calcário
Ferrito
Silicato
Hematita
Calcário
Ferrito
Silicato
Hematita
Silicates
Hematite Ferrites
Limestone
Effect of Grain Size Distribution of Limestone in Iron Ore Pellets *
b) Effect of Limestone grain size in the porosity of fired pellets
a) Coarse Limestone leading to a poor slag formation, generating a weak-porous structure &
affecting strengthning of fired pellets
(Coarse Limestone Partially Burned)
I - Coarser grain size II – Intermediate grain size II – Finer grain size
* COSTA, R.V.P. – Otimização da Resistência à Compressão de Pelotas de Minério de Ferro pela Aplicação de Projeto Robusto
– Dissertação de Mestrado da REDEMAT (UFOP-CETEC-UEMG). 2008 – 113p. ** YANG, Y-H., Fundamental mechanisms of
pore formation in lron ore sinter and pellets - ISIJ International, Vol. 31 (1991), No. 5, pp. 468 477