Granulometric Control of Iron Ore Pellets Using a Fuzzy System.

Resumo

Pellets are concentrates of different chemical and mineralogical, with specific properties and great
application on steel manufacture. This work describes the practical application of a fuzzy control to an industrial
iron ore pelletizing. The objective was to develop a model to detect quality pellet size standard on the process, and
with the identification of the standard, execute the control the rotation and feed rate of the pelletizing disc, since a
specific angular rotation speed of the disc is necessary for the formation of the pellet, because if the disc moves
slowly, don't form pellets and also if the disc moves quickly, the centrifugal force generated raises the mass of the
ore to the limit angle and at this point the mass will fall, not allowing the formation of pellets. When the disc moves
at such a speed that the centrifugal force is overcome by the frictional force, the material is raised to a certain angle
and then rolls over itself, forming the pellets by agglomeration. When we reduce the load on the pelletizing disc,
we reduce the particle size dispersion of the disc product. The system developed aimed to improve the pellet
formation yield, making the production better with quality.