Study of the Effect of Surface Liquid Flow During Column Flotation of Mining Tailing of the Dos Carlos Dam

摘要

During column flotation of mining tailings of the Dos Carlos dam, it was observed that the effect of surface liquid flow (J_L) is a variable that determines the rate of rise of packing bubbles and therefore, causes the generation of gas retained within the columnar system. Also overall more stable laminar flows were observed, in a range of superficial flow of liquid in the bottoms stream (J_(LT)) from 0.446 to 0.68 cm/s, showing the stability in the range of superficial gas flow (J_g) from 0.1 to 0.5 cm/s. Observing a uniform bubble size for the three J_(Lt) evaluated, with a diameter between 0.05475 and 0.2525 cm, at all the range evaluated of J_g. Furthermore, an uniform performance was obtained, and with the same rate of rise of packing bubbles, showing a greater packing bubbles at J_(LT) = 0.446 cm/s, due to the lesser bubble size observed, in comparison with the values of J_(Lt) of 0.68 and 1.017 cm/s.