Regarding the prediction of attachment time of real ore particles from the flotation data, Danoucaras et al. (2013) used the P9 flotation model (Savassi, 1998) which shows the relationship between flotation mineral recovery and the following variables : floatability, entrainment, froth and water recovery, the bubble surface area flux and residence time. In the P9 flotation model, the relationship between floatability and the attachment time is described using fundamental models for particle collection by bubble(Dobby and Finch, 1987). By processing the measurements obtained by Vianna (2004) for galena size-liberation classes,Danoucaras et al. (2013) calculated the attachment time. Albijanic et al. (2012) demonstrated that for high grade particles(22.2–40.4%) measured attachment time is close to the value obtained by Danoucaras et al. (2013) while for lower grade particles (