The Effect of Rod Cross-Sectional Shape on Grinding Kinetics in Laboratory Dry Rod Mill

Document Type : Research - Paper

Authors

1 Ph.D candidate in Mineral Processing, Dept. of Mining, Petroleum and Geophysics Faculty, Shahrood University of Technology, Shahrood, Iran

2 Associate Professor, Dept. of Mining, Petroleum and Geophysics Faculty, Shahrood University of Technology, Shahrood, Iran

3 Associate Professor, University of Queensland, Sustainable Minerals Institute, Julius Kruttschnitt Mineral Research Centre (SMI-JKMRC), Australia

Abstract

The effects of grinding media shape and charge filling on grinding kinetics were investigated in dry rod milling. Two shapes of grinding media (simple and grooved rods) were assessed.The results showed that the production rate of particles smaller than 90 microns and the disappearance rate of particles larger than 2 mm for simple rods were higher than the grooved rods. Also with decreasing the mill filling from 100 to 80% for grooved rods, the grinding kinetics rate was increased. The results showed that the grinding media shape did not change the grinding mechanism in rod mill. However, the operational advantage of using grooved media was in the production of less fine particles compared to the simple grinding media.

Highlights

[1] Shi, F. (2004). “Comparison of grinding media—Cylpebs versus balls”. Minerals Engineering, 17(11): 1259-1268.

[2] Lameck, N., and Moys, M. (2006). “Effects of media shape on milling kinetics”. Minerals Engineering, 19(13): 1377-1379.

[3] Cuhadaroglu, D., Samanli, S., and Kizgut, S. (2008). “The effect of grinding media shape on the specific rate of breakage”. Particle & Particle Systems Characterization, 25(5-6): 465-473.

[4] Simba, K. P., and Moys, M. H. (2014). “Effects of mixtures of grinding media of different shapes on milling kinetics”. Minerals Engineering, 61: 40-46.

[5] von Krüger, F., Donda, J., Drummond, M., and Peres, A. (2000). “The effect of using concave surfaces as grinding media”. Developments in Mineral Processing, 13: C4-86-C84-93.

[6] Kelsall, D., Stewart, P. S., and Weller, K. (1973). “Continuous grinding in a small wet ball mill.Part V.A study of the influence of media shape”. Powder Technology, 8(1): 77-83.

[7] Ipek, H. (2006). “The effects of grinding media shape on breakage rate”. Minerals Engineering, 19(1): 91-93.

[8] Rowland, C., and Kjos, D. M. (1980). “Rod and ball mills”. In: Mular, A. L., and Bhappu, R. B. (Eds.), Mineral Processing Plant Design, AIME, 239-278.

[9] Tavares, L. M., de Carvalho,‌ R. M., and Guerrero, J. C. (2012). “Simulating the Bond rod mill grindability test”. Minerals Engineering, 26: 99-101.

[10] Wills, B. A., and Finch, J. (2015). “Wills’ mineral processing technology: an introduction to the practical aspects of ore treatment and mineral recovery”. Butterworth-Heinemann, pp. 512.

[11] Zhou, Y., Xu, B. H., Yu, A.-B., and Zulli,‌ P. (2002). “An experimental and numerical study of the angle of repose of coarse spheres”. Powder Technology, 125(1): 45-54.

[12] Shi, F., and Kojovic, T. (2007). “Validation of a model for impact breakage incorporating particle size effect”. International Journal of Mineral Processing, 82(3): 156-163.

[13] King, R. P. (2001). “Modeling and Simulation of Mineral Processing Systems”. Butterworth-Heinemann, pp. 403.

Keywords

References

[1] Shi, F. (2004). “Comparison of grinding media—Cylpebs versus balls”. Minerals Engineering, 17(11): 1259-1268.
[2] Lameck, N., and Moys, M. (2006). “Effects of media shape on milling kinetics”. Minerals Engineering, 19(13): 1377-1379.
[3] Cuhadaroglu, D., Samanli, S., and Kizgut, S. (2008). “The effect of grinding media shape on the specific rate of breakage”. Particle & Particle Systems Characterization, 25(5-6): 465-473.
[4] Simba, K. P., and Moys, M. H. (2014). “Effects of mixtures of grinding media of different shapes on milling kinetics”. Minerals Engineering, 61: 40-46.
[5] von Krüger, F., Donda, J., Drummond, M., and Peres, A. (2000). “The effect of using concave surfaces as grinding media”. Developments in Mineral Processing, 13: C4-86-C84-93.
[6] Kelsall, D., Stewart, P. S., and Weller, K. (1973). “Continuous grinding in a small wet ball mill.Part V.A study of the influence of media shape”. Powder Technology, 8(1): 77-83.
[7] Ipek, H. (2006). “The effects of grinding media shape on breakage rate”. Minerals Engineering, 19(1): 91-93.
[8] Rowland, C., and Kjos, D. M. (1980). “Rod and ball mills”. In: Mular, A. L., and Bhappu, R. B. (Eds.), Mineral Processing Plant Design, AIME, 239-278.
[9] Tavares, L. M., de Carvalho,‌ R. M., and Guerrero, J. C. (2012). “Simulating the Bond rod mill grindability test”. Minerals Engineering, 26: 99-101.
[10] Wills, B. A., and Finch, J. (2015). “Wills’ mineral processing technology: an introduction to the practical aspects of ore treatment and mineral recovery”. Butterworth-Heinemann, pp. 512.
[11] Zhou, Y., Xu, B. H., Yu, A.-B., and Zulli,‌ P. (2002). “An experimental and numerical study of the angle of repose of coarse spheres”. Powder Technology, 125(1): 45-54.
[12] Shi, F., and Kojovic, T. (2007). “Validation of a model for impact breakage incorporating particle size effect”. International Journal of Mineral Processing, 82(3): 156-163.
[13] King, R. P. (2001). “Modeling and Simulation of Mineral Processing Systems”. Butterworth-Heinemann, pp. 403.
Journal of Mineral Resources Engineering
Volume 6, Issue 3 - Serial Number 21
October 2021
Pages 157-171

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History

  • Receive Date: 01 March 2020
  • Revise Date: 07 July 2020
  • Accept Date: 29 November 2020

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