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Ingeniería y competitividad

versão impressa ISSN 0123-3033

Resumo

PINERES, J. et al. Kinetics of flotation of organic matter in Cerrejón coals (Guajira) using a flotation column. Ing. compet. [online]. 2012, vol.14, n.2, pp.103-109. ISSN 0123-3033.

This work shows the kinetic constants of three bituminous coals of Cerrejón (Guajira), M1, M2 and M3. A flotation column at laboratory scale (5 m high and 5 cm in diameter) at normal pH (7.2) was used as flotation reagents, Sodium Lauryl Ether Sulfate 28% (w/w) as a frother with a concentration of 15.4 lb/t of coal and creosote oil as a collector with a concentration of 10 lb/t of coal was used, using different sample collection times (five floated samples were taken every 45 s, for a total of 3.75 min). The results showed first-order kinetics constant for the recovery of combustible material. The results showed first-order kinetics constant for combustible recovery material. The kinetic constants calculated are in the range of 0126 - 0255 min-1, M3 sample showed the highest values. The combustible recovery material are in the range of 42 - 61%, M3 sample coal showed greater recovery of combustible material. In general, ash reductions were obtained between 71 and 91%, indicating that the operating conditions used in the process and the ash release was favorable

Palavras-chave : Combustible recovery; Flotation column; Kinetic constant.

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