Effect of the Energy Consumed in Grinding and the Initial Size of the Feed on the Percentiles of the Product of the Grinding Process PDF

Keywords

Mining, grinding, energy

Abstract

A set of 43 experiments are carried out on equal-sized samples of 200g weight from numulitic-limestones crushed and screened to obtain a uniform size. These samples were ground in a vertical stamp mill at variable energy levels (0.7 to 3.5 KwH/t).The average initial size of the samples varied as 0.565, 0.45, 0.358, 0.283, 0.225 and 0.18 cm, respectively. The percentiles of the product in each experiment are calculated. Mathematical analysis is used in the present work to obtain some relationships between the percentiles (dx) = (d20, d30, d40, ... and d90) and the initial size of the feed si rather than the energy consumed in the process of grinding E. Recommended relationships can be used practically for regulating either the initial size feeding to the stamp mill or the energy required percentiles in the product.