Some findings are reported on theoretical and experimental research studies of mechanical, structural, physical and chemical properties, micro-and

Experimental study is made of the granulation of fine dispersed materials in spouted beds. According to the first method, the granulation is carried out by blowing the gas‐dust flow through the bed of coarse particles, whose surface is melted by a high‐temperature fluidizing gas. According to the second method, the granulation occurs in the spouted bed of fine particles, a part of which has a melting temperature lower than the fluidizing gas. The effect of spouted bed parameters on granulation kinetics is studied. Correlations are obtained for calculation of a mean final diameter of granulated particles. A granule size distribution is shown to be close to the normal one.

An experimental study of the hydrodynamics, structure, mixing and interphase heat transfer of spouted beds of fine dispersed materials in conic‐cylindrical columns with the small outlet‐to‐inlet cross‐section ratio D/D0 ≤ 3 has been made by different methods. The effect of design and operation parameters on the shape, sizes and stability of a central core, the solid phase concentration variation in the core and annulus, the circulation rate, entrainment and heat transfer in the columns with D = 100 mm have been explored. Empirical correlations have been suggested for calculating pressure drops across such beds under the developed spouting conditions and for effective gas‐to‐solid phase heat transfer coefficients.

Experimental studies of hydrodynamics and interphase heat transfer in spouted beds, with aerosol as the dispersing media, have been conducted in conic‐cylindrical columns. The effects of various column geometries, dust fraction concentrations, dispersed materials and operation parameters have been investigated to find new ways of using the spouting technique for treating fine dispersed materials. The qualitative spouting mechanism of two‐component dispersing media is elucidated. The effect of dust concentration in the incoming gas flow and of the principal operation and design parameters on the structure, pressure drop, and dust accumulation in the bed and on the interphase heat transfer in ordinary and swirled spouted beds is shown.