Kinetics of dry grinding of celestite by ball milling


Güreşçi N., İnan A., Korkmazer O., Yekeler M. , Ulusoy U.

11thInternational Mineral Processing Symposium, Antalya, Türkiye, 21 - 23 Ekim 2008, ss.45-49

  • Basıldığı Şehir: Antalya
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayısı: ss.45-49

Özet

The breakage parameters of a run of mine chromite for dry and wet ball milling were obtained by means of standard S and B test methods. This method requires a small amount of powder for grinding for different length of time in a laboratory ball mill to obtain the breakage parameters. The single sized fraction of a  425 + 250 μm feed of material obtained from our laboratories was ground for different lengths of time in a laboratory ball mill. The specific rate of breakage, (Si), for dry milling was determined to be 0.28 min-1, while the Si value for wet grinding was 0.56 min-1. The cumulative breakage-distribution function (Bij) values (,  and ) obtained were the same for dry and wet ball milling. The ,  and  values were 0.75, 1.14 and 7.9, respectively. The simulation of the product-size distributions using a "Two-Stage Ball-Mill Circuit Simulator: PSUSIM" was performed by making use of the obtained S and B parameters. The simulated results were in good agreement with the experimental results.