高炭素フ***クロムの粉砕について(製銑)

概要

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The particle size distribution and the specific surface area were measured on the comminution products of high carbon ferrochrome ground in rod- and ball-mill for 0.5 to 8 hr. It was found that the Gaudin-Schuhmann equation (Eq. 1) can be applied for the particle size distribution in their over-micron range. On the other hand, the Charles equation (Eq. 2) on the energy-size reduction relationship did not cover the whole range of comminution carried out and the size modulus, k, and the inverse of specific surface area, 1/S, were found to converge to their limiting values. On the other hand, the Harris equation (Eqs. 5 and 6) based on a modified logistic function fit well the energy-size reduction relationships. The limiting value of the size modulus k and the specific surface area S, were estimated as 22 to 26μ and 2 to 5×10^4 cm^2/cm^3, respectively. The specific surface area estimated on the basis of size distribution did not coincide with that measured by the air permeability method. At longer grinding times, the measured values become larger than the estimated ones. This difference was supposed to be due to possible flocculation or welding during comminution which also increases with grinding time.
社団法人日本鉄鋼協会の論文
1968-03-01