Investigation into processes of flocculation of finely divided minerals by radio-frequency method

A review of principles and applications of magnetic flocculation to separate ultrafine magnetic particles

“…Based on the promising characteristics of magnetic flocculation, the authors believe that series of devices and flowsheets will be proposed and developed in the near future for the designation of appropriate instruments which could further improve the applications of magnetic flocculation in various industries. Table 1 Possible size classification relevant to magnetic separation [18] Table 2 Charge in frequency Δf with increase in mineral mass [74] Table 3 The threshold magnetic field B F (w=1) and a true flocculating magnetic field B + F (t 1/2 =1 s) for a suspension containing 10 percent by (volume) of solids [17] Table 3 The threshold magnetic field B F (w=1) and a true flocculating magnetic field B + F (t 1/2 =1 s) for a suspension containing 10 percent by (volume) of solids [17] Particle diameter /μm Hematite Siderite Dimensionless hydrodynamic (viscous) force over a paramagnetic particle with radius (A) R p =160 nm, or (B) R p =300 nm for different superficial velocities and as a function of the surface-to-surface separation [4]. Fig.…”

“…The radio-frequency method can be used to study processes of sedimentation and flocculation of various minerals having both low and high solid contents in pulps, is relatively easy to automate, and allows use of computer for data analysis right during the measurement [74]. The data on the change in the oscillatory circuit frequency f referred to m = 1 g of various minerals are cited in Table 2.…”