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Improvement of Residual Sugar Cane Bagasse Ash by Mechanical Grinding

2014; Trans Tech Publications; Volume: 600; Linguagem: Inglês

10.4028/www.scientific.net/kem.600.597

1662-9809

Fernandes Filho Primo, Sandro Marden Torres, Normando Perazzo Barbosa, Maria de Arruda Magalhães Vivian, Andressa de Araújo Porto Vieira,

Minerals Flotation and Separation Techniques

This study investigated the effect of mechanical grinding of the residual sugar cane bagasse ash on its theoretical reactive capacity. The independent variables were: type of ball mill (rotary and centrifugal crusher), and milling time. The analyzed dependent variables were: specific surface, by Blaine equipment; and mineralogy, assessed by X-ray diffraction and infrared. The results indicate that the specific surface of the ball mill type centrifugal crusher was more efficient than the rotary, achieving an increase of 500% for an optimal grinding time of 60 min. The diffraction spectra X-ray and infrared were not altered due to the grinding process. Despite the degree of finess increase, it can be concluded that the used milling conditions were not able to modify their mineralogical characteristics. Both refinement processes were capable of enhancing the material reactivity while provided a significant increase in its specific surface. Longer milling times becomes unnecessary, because would cause little change in size distribution curve, at a high energy cost.