竪型リボン混合機の所要動力

抄録

The effects of various operating conditions on the rotational torque of vertical ribbon mixers have been studied.
The rotational torque, T[Kgm] of the mixers increases with increasing the height of powders bed, H[m], the bulk density, ρ_a[kg/m³] and the internal friction factor μ_i[-] of the powders, and the diameter of the ribbon, D₀[m]. In the range of the rotating speed, N, of 30≤N≤100r.p.m., the torque remains almost constant and has a tendency to decrease as the ribbon width increases.
The torque data are well correlated with the experimental conditions by the relation T=0.15ρ_a^1.0μ_i^0.7R_p^1.2R_b^-0.8H^1.5D₀^3.0, where, R_p [-] and R_b [-], respectively, are the ratios of the pitch and the width of the ribbon to the ribbon diameter.