Zur Kenntnis des Mahlgutes

Method for evaluating packing condition of particles in coal water slurry

“…(14): when m = 10, S = 1.2 and ε = ε i = 0.4, β = − ln 0.4/(10 × ln 1.2) ≈ 0.51. This value is consistent with Andreasen's study [7], but higher than Dinger and Funk's study [8]. According to Eq.…”

“…However, in practice, it is more important to describe the packing condition of nonspherical particles with continuous size distribution. Andreasen [7] was the first to study the packing behavior of continuous size distribution powders; he used the Gaudin-Schuhmann (G-S) equation to describe the real particle size distribution (PSD):…”

Particle Size Studies. Methods

“…The basis for this relation was discussed under Equation 3. Ds = 100/2(G//df) microns (6) where G/ is the weight per cent in the fraction for which d/ is the arithmetic mean diameter of the fraction in microns.…”

Particle-size Studies. Properties of Finely Divided Materials.

“…For irregular shaped particles, d is the diameter of a sphere that falls at the same rate as the particle. This equation is valid for Reynolds numbers below 1 where the Reynolds number is defined (51) as: vdD, X 10,000 (2) While numerous studies on Stokes' Law have been published, there are few on the application of it to the practical problem of relating settling velocity and the diameter of subsieve particles of irregular shape. These relations are of importance where the conversion of particle-size data is required, as, for example, in the computation of the surface area of a powder from its weight distribution.…”