Reference | Presenter | Authors (Institution) | Abstract |
---|---|---|---|
06-231 | Fernando Augusto Andrade | Andrade, F.A.(CTMSP); Nunes, P.C.(CTMSP); Silva, R.A.(CTMSP); |
Boron Carbide (B4C) is a very useful
material due to its characteristics like high hardness, high chemical stability
and neutrons absorption capacity, without producing lasting radioisotopes.
These properties allow it to be an ally on the nuclear industry, used as
nuclear reactors shield and control element of the reaction inside the nuclear
reactor. In the ceramic industry it is usually processed as a powder, but
because its low flowability it is necessary additional processes such as slurry
preparation and spray drying to prepare the powder for pressing, sintering and
grinding, until it turns into pellets ready for use. The main objective of this
work was the characterization of the boron carbide slurry, in order to obtain the
minimum viscosity point and evaluate the atomized product yield (spray dryer
product). Particle size distribution was also measured. It was found the
minimum viscosity point for all solids contents and the slurries prepared for
the spray dryer followed the tendency observed on the small samples. It was
observed that the method with the small samples analysis is very useful to
estimate the viscosity in the large scale process. The atomized product yield
and the particle size distribution were better in the high content solids
condition. According to the results done with the small samples was possible to
increase the product yield in the spray dryer process. |
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