Autogenous grinding method

Details Autogenous grinding method Autogenous grinding method

B - Operations, Transporting

02

C

241/142

B02C 23/10 (2006.01) B02C 25/00 (2006.01)

Patent

CA 1196896

ABSTRACT The present invention relates to a method for comminuting a coarse lump of mineral material in an autogenous primary grinding system, in which an ingoing material is divided into a coarse fraction and a fine fraction which are determined by a crushing point determined by the point of intersection between two tangents drawn through two adjacent inflexion points on a size distribution graph obtained by screen analysis of a grinding mill charge of material obtained after an autogenous grinding process. The smallest particle size of the coarse fraction is greater than the particle sizes in the upper of said inflexion points, and the ratio between said fractions is determined on the basis of achieving a given charge quantity for a particular, selected set-point power value for the mill in question, and determined with respect to a selected degree of grinding.

416439

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