One of the main characteristics of mechanical Flotation Machine is to agitate the slurry and disperse air bubbles throughout the pulp volume. In order to assess the performance of flotation machines, it is important to know the spatial distribution of dispersed bubbles within the tank which directly affects air hold up and rate constant. The current CFD simulations are parametric study of two-phase flow in Wemco 0.8 m3 that provide the hydrodynamic data and air volume fraction spatial distribution for uniform bubble size in the pulp phase. Three different bubble sizes-db = 0.5, 0.7 and 1.0 mm-are used to investigate the effects of the bubble size on air flow rate, air holdup and rate constant.
Froth flotation is a process for selectively separating hydrophobic materials from hydrophilic. This is used in mineral processing, paper recycling and waste-water treatment industries. Historically this was first used in the mining industry, where it was one of the great enabling technologies of the 20th century. It has been described as "the single most important operation used for the recovery and upgrading of sulfide ores". The development of froth flotation has improved the recovery of valuable minerals, such as copper-and lead-bearing minerals. Along with mechanized mining, it has allowed the economic recovery of valuable metals from much lower grade ore than previously.