Abstract
In the cace of the batch grinding system utilizing the laboratory ball mill, it is necessary to distinguish between the inherent grinding-resistance of the sample itself and the grindability-obstructing effects of the reagglomeration of fine-particies. The grindability of the sample continuously change in accordance with the progress of grinding, because the contribution-rates of grindability-obstructing effect enlarge with the increase of the specific surface area.
Therefore, the indicating index for the degree of the grindability, that is Grindability-Index, should be considered as a function of the specific surface area.
We could have developed the equation for Grindability-Index given as a function of the specific surface area. We could have characterized that the constant “a” is the indicating index for the coarsegrindability and the constant “b” is the indicating index for the fine-grindability.
Gi=KL(a·eb·S-1)
Gi: Grindability-Index (kWh/t)
S: Specific surface area (m2/g)
a: Coarse-grindability constant
b: Fine-grindability constant
KL: Linearizing constant
