Affiliation:
1. Department of Mining Engineering, Hacettepe University, Beytepe, Ankara 06800, Turkey
Abstract
Varied types/geometries of stirred mills have been produced by different manufacturers, and the comparison task has been accomplished for some of the technologies, i.e., Tower mill vs IsaMill. However, the main drawbacks of these comparisons were the uncommon characteristics of the milling environment, such as media size. In this study, HIGMill and IsaMill, which were vertically and horizontally chamber oriented, respectively, were compared for a regrinding process of copper ores with similar characterization and almost the same milling environment. Detailed characterization studies of the two ore types, such as work index, ore breakage and chemical composition, were performed. Modeling of the two mills was also performed to show the variation in the rate of breakage parameters. The entire assessments were based on comparing the signature plots, energy and shape of the product size distribution as well as the stress analyses. The results showed that HIGMill and IsaMill technologies behaved in a different manner for coarse and fine tail of comminution. IsaMill with horizontal orientation was found to be more energy-efficient, particularly at the fine grind size, and produced finer product when it was operated at the same stress level of HIGMill.
Subject
Geology,Geotechnical Engineering and Engineering Geology
Reference38 articles.
1. Comparison of energy efficiency between ball mills and stirred mills in coarse grinding;Shi;Miner. Eng.,2009
2. Sepulveda, J.L. (1981). A Detailed Study on Stirred Ball Mill Grinding. [Ph.D. Dissertation, Department of Metallurgy and Metallurgical Engineering, The University of Utah].
3. Variables affecting the fine grinding of minerals using stirred mills;Jankovic;Miner. Eng.,2003
4. Mular, A.L., Halbe, D.N., and Barratt, D.J. (2002). Mineral Processing Plant Design, Practice, and Control, SME.
5. Designing flotation circuits for high fines recovery;Pease;Miner. Eng.,2006