Journal of Mining Engineering

Journal of Mining Engineering

Comparison of Hpgr and Traditional Breakage Methods on Breakage Function and Selection Function of Low-Grade Iron Ore

Document Type : research - paper

Authors
1 Mining Engineering Faculty Sahand University of Technology
2 mineral processing, mining faculty, sahand university of technology
Abstract
High-pressure grinding rolls(HPGR) have been widely used in the mineral crushing industry due to their energy efficiency and improved mineral liberation. This research examined the effect of HPGR and traditional crushing methods on low-grade iron ores' breakage and selection functions. The breakage function was calculated using Bẻrubẻ, Herbest & Fuerstenau, and Modified Herbst & Fuerstenau methods, and it was observed that HPGR increases the breakage function (Bi1) for most size fractions, resulting in higher percentages of finer particles after grinding compared to traditional crushing methods. However, this difference diminishes as the particle size decreases. The selection function analysis showed that HPGR increased particle breakage rate compared to traditional methods. Moreover, the selection function of the samples peaked at -1.410+1.680 mm before declining, suggesting that the highest breakage rate occurred at this size. The Broadbent-Calcut method also revealed that the value of Φ varied for different sizes, indicating a non-normalized breakage function. Additionally, the value of γ for HPGR-crushed samples was lower than traditional methods, indicating that HPGR produced finer particles.
Keywords
Subjects

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Volume 19, Issue 64
Autumn 2024
Pages 81-99

  • Receive Date 21 June 2024
  • Revise Date 19 September 2024
  • Accept Date 23 November 2024