Hydrocycloning and Characterization of kaolin wastes

Reference	Presenter	Authors (Institution)	Abstract
06-164	Chrystiano Araujo Ferreira	Ferreira, C.A.(Universidade Federal da Paraíba); Dutra, R.P.(Federal University of Paraíba); Caetano, A.L.(Universidade Federal da Paraíba); FERREIRA, H.S.(UFPB); dos Santos Silva, I.D.(Universidade Federal da Paraíba);	The use of hydrocyclone represents a very efficient and affordable tool for the purification of waste, since it allows separation between coarse and fine fractions of the different constituents of the waste. In order to better understand the differences between different kaolin wastes and the use of hydrocyclone for its beneficiation, this work has the objective of comparing two kaolin wastes, one from the city of Assuncão and the other from Juazeirinho, both of the state of Paraíba, Brazil, using characterization techniques before and after the beneficiation process using hydrocyclone. Initially both wastes were milled, dried and sieved at # 35, then each waste was mixed with water to obtain a 6kg residue/10L water dispersion (60% solids) dispersion using a disperser at 1200rpm for 3h. Each of the obtained dispersions was benefited using hydrocyclone (5mm vertex and 4mm apex), thus obtaining the hydrocyclone fine and coarse fractions of each waste. Chemical and mineralogical characterizations were performed using X-ray diffraction (XRD) techniques, differential thermal analysis (DTA), thermogravimetry (TG), X-ray fluorescence (XRF), all previously sieved at # 200 and # 35 for analysis using the dry granulometry technique. The results of the characterization indicate that the wastes are mainly composed of mica, quartz and kaolinite and the use of hydrocyclone was very efficient in the separation of the fine and coarse fractions of the wastes. The hydrocycloning of the Assunção kaolin waste was the one that presented with clearer changes between the fine and coarse fractions due to the greater amount of clay minerals of the kaolinite group before hydrocyclone.
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