### Operational work index for grinding plants -

01.01.2000· The foundation for Wiog is Bond's equation for a grinding circuit, but here it is defined on the basis of measurements performed on the complete grinding plant: solids feed flow to the rod mill, fs0 of the feed ore, Ps0 in the hydrocyclones overflow and the power draft of the mills. The on-line calculation of either the rod mill operational work index or the overall plant operational work