Study of separation features in floatex density separator for cleaning fine coal

Prediction of separation performance of Floatex Density Separator for processing of fine coal particles

“…Details of this unit are given elsewhere (Sarkar et al, 2008a). The results are validated against the product size distribution as well as the density distributions for all three types of feeds discussed in the previous section.…”

“…At the upper zone, heavy media formation is nearly absent and, therefore, the assumed suspension density is higher than the actual density. The absence of density effect and the dominance of size effect in the separation performance at low bed pressure are discussed elsewhere (Sarkar et al, 2008a). We believe that the error in the estimation of suspension density is the primary reason for the overprediction in the products density distribution.…”

“…However, most of these studies are restricted to binary or ternary mixtures varying either in size or density. It is well established that in a teeter bed separator both the density and size play significant roles (Galvin et al, 1999b;Sarkar et al, 2008a). Although it is possible to predict separation using a mass transfer approach with the Fickian diffusivity model, its application is severely restricted because of unavailability of reliable diffusivity values (Epstein, 2005).…”

A short review on hydraulic classification and its development in mineral industry

“…However these studies are pertaining to characterize the teeter water flow rate on particle separation. Also the particle separation in FDS while treating different coal was characterized in terms of slip velocity models [57,60,61,62,69]. Similarly the effect of teeter water flow rate on particle separation for chromite and iron ore fines was investigated [47, A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT 22 56].…”

“…From the literature listed in Table 2, it is envisaged that, variables (a) and (b) are the most critical to achieve the particle classification or separation. Out of these two, teeter water flow rate and set point are the controllable variables whereas teeter bed height as well as teeter bed density are Few researchers were attempted to understand the particle separation inside the separation chamber by means of slip velocity models and relative velocity models [57,60,61,62,69,70,72,73] but the considered models are unable to address the complex dynamics inside the separation chamber like voidage gradient, size distribution and density particle gradient in the bed and retention time distribution of particles, which need to be incorporated. Moreover, there are several statistical designed experiments were carried out by using different material and empirical models were developed to analyze the performance [58,62,71,[74][75][76].…”