Establishing the effect of a decrease in power intensity of self-oscillating grinding in a tumbling mill with a reduction in an intrachamber fill

Authors

DOI:

https://doi.org/10.15587/1729-4061.2019.183291

Keywords:

tumbling mill, chamber filling degree, fill self-oscillation, specific power intensity in grinding

Abstract

Effect of the degree of chamber filling with the charge on efficiency of the self-oscillating grinding process in a tumbling mill has been assessed.

By using the approximate analytical and experimental method, dynamic effect of increasing the self-oscillating impact action of grinding fill on the crushed material was compared with the conventional steady-state motion mode. A significant increase in average sums of vertical components of the self-oscillating collision momenta and the average sums of power of such components with a decrease in the chamber filling degree was found. Manifestation of this effect is due to the increase in the self-oscillations swing with decreasing filling. An increase in the maximum momentum values was found to be approximately 2.4 times at the degree of filling κ=0.45, 3.1 times at κ=0.35 and 5.8 times at κ=0.25. An increase by 5.7 times in maximum values of momentum power was found at κ=0.45, by 9.6 times at κ=0.35 and by 45.5 times at κ=0.25.

Technological effect of significant decrease in the specific power intensity and productivity growth of the innovative self-oscillating grinding process as compared to the characteristics of the conventional steady-state process with a reduction in the chamber filling degree have been experimentally established.

The process of grinding cement clinker with a complete filling of gaps between spherical grinding bodies with a relative size of 0.026 with particles of the crushed material was considered. It was found that during excitation of self-oscillations, power intensity of grinding decreased and productivity increased. A decrease in relative specific power intensity was observed: 27 % at κ=0.45, 42% at κ=0.35 and 55 % at κ=0.25. A 7 % increase in relative productivity was found at κ=0.45, 30 % at κ=0.35, and 46 % at κ=0.25.

The effects established in operation have allowed us to predict rational parameters of the self-oscillating grinding process carried out in a tumbling mill with variation in the chamber filling degree

Author Biographies

Kateryna Deineka, Technical College National University of Water and Environmental Engineering Soborna str., 11, Rivne, Ukraine, 33028

PhD

Yuriy Naumenko, National University of Water and Environmental Engineering Soborna str., 11, Rivne, Ukraine, 33028

Doctor of Technical Sciences, Associate Professor

Department of Construction, Road, Reclamation, Agricultural Machines and Equipment

References

  1. Naumenko, Yu. V. (1999). The antitorque moment in a partially filled horizontal cylinder. Theoretical Foundations of Chemical Engineering, 33 (1), 91–95.
  2. Naumenko, Yu. V. (2000). Determination of rational rotation speeds of horizontal drum machines. Metallurgical and Mining Industry, 5, 89–92.
  3. Naumenko, Y. (2017). Modeling of fracture surface of the quasi solid-body zone of motion of the granular fill in a rotating chamber. Eastern-European Journal of Enterprise Technologies, 2 (1 (86)), 50–57. doi: https://doi.org/10.15587/1729-4061.2017.96447
  4. Naumenko, Y., Sivko, V. (2017). The rotating chamber granular fill shear layer flow simulation. Eastern-European Journal of Enterprise Technologies, 4 (7 (88)), 57–64. doi: https://doi.org/10.15587/1729-4061.2017.107242
  5. Naumenko, Y. (2017). Modeling a flow pattern of the granular fill in the cross section of a rotating chamber. Eastern-European Journal of Enterprise Technologies, 5 (1 (89)), 59–69. doi: https://doi.org/10.15587/1729-4061.2017.110444
  6. Tavares, L. M., Cavalcanti, P. P., de Carvalho, R. M., da Silveira, M. W., Bianchi, M., Otaviano, M. (2018). Fracture probability and fragment size distribution of fired Iron ore pellets by impact. Powder Technology, 336, 546–554. doi: https://doi.org/10.1016/j.powtec.2018.06.036
  7. Cavalcanti, P. P., de Carvalho, R. M., das Chagas, A. S., da Silveira, M. W., Tavares, L. M. (2019). Surface breakage of fired iron ore pellets by impact. Powder Technology, 342, 735–743. doi: https://doi.org/10.1016/j.powtec.2018.10.044
  8. Deineka, K. Y., Naumenko, Y. V. (2018). The tumbling mill rotation stability. Scientific Bulletin of National Mining University, 1, 60–68. doi: https://doi.org/10.29202/nvngu/2018-1/10
  9. Deineka, K., Naumenko, Y. (2019). Revealing the effect of decreased energy intensity of grinding in a tumbling mill during self-excitation of auto-oscillations of the intrachamber fill. Eastern-European Journal of Enterprise Technologies, 1 (1 (97)), 6–15. doi: https://doi.org/10.15587/1729-4061.2019.155461
  10. Wang, M. H., Yang, R. Y., Yu, A. B. (2012). DEM investigation of energy distribution and particle breakage in tumbling ball mills. Powder Technology, 223, 83–91. doi: https://doi.org/10.1016/j.powtec.2011.07.024
  11. Owen, P., Cleary, P. W. (2015). The relationship between charge shape characteristics and fill level and lifter height for a SAG mill. Minerals Engineering, 83, 19–32. doi: https://doi.org/10.1016/j.mineng.2015.08.009
  12. Cleary, P. W., Owen, P. (2018). Development of models relating charge shape and power draw to SAG mill operating parameters and their use in devising mill operating strategies to account for liner wear. Minerals Engineering, 117, 42–62. doi: https://doi.org/10.1016/j.mineng.2017.12.007
  13. Cleary, P. W., Owen, P. (2019). Effect of particle shape on structure of the charge and nature of energy utilisation in a SAG mill. Minerals Engineering, 132, 48–68. doi: https://doi.org/10.1016/j.mineng.2018.12.006
  14. Deniz, V. (2011). Influence of interstitial filling on breakage kinetics of gypsum in ball mill. Advanced Powder Technology, 22 (4), 512–517. doi: https://doi.org/10.1016/j.apt.2010.07.004
  15. Gupta, V. K., Sharma, S. (2014). Analysis of ball mill grinding operation using mill power specific kinetic parameters. Advanced Powder Technology, 25 (2), 625–634. doi: https://doi.org/10.1016/j.apt.2013.10.003
  16. Gupta, V. K. (2016). Determination of the specific breakage rate parameters using the top-size-fraction method: Preparation of the feed charge and design of experiments. Advanced Powder Technology, 27 (4), 1710–1718. doi: https://doi.org/10.1016/j.apt.2016.06.002
  17. Öksüzoğlu, B., Uçurum, M. (2016). An experimental study on the ultra-fine grinding of gypsum ore in a dry ball mill. Powder Technology, 291, 186–192. doi: https://doi.org/10.1016/j.powtec.2015.12.027
  18. Petrakis, E., Stamboliadis, E., Komnitsas, K. (2017). Identification of Optimal Mill Operating Parameters during Grinding of Quartz with the Use of Population Balance Modeling. KONA Powder and Particle Journal, 34, 213–223. doi: https://doi.org/10.14356/kona.2017007
  19. Panjipour, R., Barani, K. (2018). The effect of ball size distribution on power draw, charge motion and breakage mechanism of tumbling ball mill by discrete element method (DEM) simulation. Physicochemical Problems of Mineral Processing, 54 (2), 258–269. doi: http://doi.org/10.5277/ppmp1811
  20. Schnatz, R. (2004). Optimization of continuous ball mills used for finish-grinding of cement by varying the L/D ratio, ball charge filling ratio, ball size and residence time. International Journal of Mineral Processing, 74, S55–S63. doi: https://doi.org/10.1016/j.minpro.2004.07.024
  21. Deniz, V. (2012). The effects of ball filling and ball diameter on kinetic breakage parameters of barite powder. Advanced Powder Technology, 23 (5), 640–646. doi: https://doi.org/10.1016/j.apt.2011.07.006
  22. Deniz, V. (2016). An investigation on the effects of the ball filling on the breakage parameters of natural amorphous silica. Advanced Powder Technology, 27 (4), 1272–1279. doi: https://doi.org/10.1016/j.apt.2016.04.017
  23. Cayirli, S. (2018). Influences of operating parameters on dry ball mill performance. Physicochemical Problems of Mineral Processing, 54 (3), 751–762. doi: http://doi.org/10.5277/ppmp1876
  24. Yin, Z., Peng, Y., Zhu, Z., Yu, Z., Li, T., Zhao, L., Xu, J. (2017). Experimental study of charge dynamics in a laboratory-scale ball mill. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 232 (19), 3491–3499. doi: https://doi.org/10.1177/0954406217738031
  25. Orozco, L. F., Nguyen, D.-H., Delenne, J.-Y., Sornay, P., Radjai, F. Discrete-element simulation of particle breakage inside ball mills: A 2D model. Available at: https://arxiv.org/ftp/arxiv/papers/1901/1901.07402.pdf
  26. Cleary, P. W., Owen, P. (2019). Effect of operating condition changes on the collisional environment in a SAG mill. Minerals Engineering, 132, 297–315. doi: https://doi.org/10.1016/j.mineng.2018.06.027
  27. Rezaeizadeh, M., Fooladi, M., Powell, M. S., Mansouri, S. H. (2010). Experimental observations of lifter parameters and mill operation on power draw and liner impact loading. Minerals Engineering, 23 (15), 1182–1191. doi: https://doi.org/10.1016/j.mineng.2010.07.017
  28. Soleymani, M. M., Fooladi, M., Rezaeizadeh, M. (2016). Experimental investigation of the power draw of tumbling mills in wet grinding. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 230 (15), 2709–2719. doi: https://doi.org/10.1177/0954406215598801
  29. Mulenga, F. K., Mkonde, A. A., Bwalya, M. M. (2016). Effects of load filling, slurry concentration and feed flowrate on the attainable region path of an open milling circuit. Minerals Engineering, 89, 30–41. doi: https://doi.org/10.1016/j.mineng.2016.01.002
  30. Soleymani, M., Fooladi Mahani, M., Rezaeizadeh, M. (2016). Experimental study the impact forces of tumbling mills. Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering, 231 (2), 283–293. doi: https://doi.org/10.1177/0954408915594526
  31. Yin, Z., Peng, Y., Zhu, Z., Yu, Z., Li, T. (2017). Impact Load Behavior between Different Charge and Lifter in a Laboratory-Scale Mill. Materials, 10 (8), 882. doi: https://doi.org/10.3390/ma10080882

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Published

2019-11-12

How to Cite

Deineka, K., & Naumenko, Y. (2019). Establishing the effect of a decrease in power intensity of self-oscillating grinding in a tumbling mill with a reduction in an intrachamber fill. Eastern-European Journal of Enterprise Technologies, 6(7 (102), 43–52. https://doi.org/10.15587/1729-4061.2019.183291

Issue

Vol. 6 No. 7 (102) (2019): Applied mechanics

Section

Applied mechanics

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Copyright (c) 2019 Kateryna Deineka, Yuriy Naumenko

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