ABSTRACT
The rice husk ash (RHA) is a residue from the rice husk combustion used as biomass in energy production. This ash is generated in large amount and due to its low density it makes complicate its management, in addition it demands a lot of space for proper storage and disposal. The RHA has high silica content in its composition, a factor that may turn it in an attractive material for several industries. In this context, this work aims to evaluate the influence of physical processing of rice husk ash through the sieve segregation processes and grinding with and without the additives use, the characteristics of this material and its suitability as a co-product. The experimental methodology used to develop this work involved the segregation and grinding of the RHA (with and without grinding additives), chemical, physical and structural characterization of samples raw-based RHA, segregated and ground. The results indicate that the particle size segregation presents as a determinant factor for the use of RHA as coproduct. With regard to the grinding, it can be seen that the average diameter of the particles decreases and the density of the samples increases with increasing milling time. However, it appears that the used additives did not significantly influence the reduction of particle diameter in the concentrations tested.
Keywords:
rice husk ash; treatment; segregation; ground; characterization.
