JKMRC Friday Seminar 2025: Some Considerations for the Comminution of Ores

JKMRC Friday Seminar 2025: Some Considerations for the Comminution of Ores

🎙 Randolph Pax 👥 6K 📅 September 15, 2025 ⏱ 61 min 👁 213 📄 expert opinion 🧭 2026-08-16
Available in: English (current) Français

Keywords

comminutionacoustic measurementgrinding millsSmartNoiseprocess optimization

Summary

Randolph Pax presents a seminar on comminution, focusing on the use of acoustic measurement to monitor and optimize grinding mills. He begins by discussing the importance of comminution in mineral processing and the challenges of measuring internal mill conditions. He introduces the SmartNoise system, which uses arrays of microphones to capture real-time acoustic signals from the mill shell. Pax explains how this system can measure parameters such as toe and shoulder angles, ball-to-rock ratio, and load, providing insights that challenge traditional models. He presents validation data from crash stops and other tests, showing correlations between acoustic signals and actual mill conditions. He also discusses the discovery of top-space impacting, which contradicts conventional trajectory calculations. The presentation highlights the advantages of acoustic measurement over traditional proxies, such as power draw and load cells, and emphasizes the importance of holistic analysis. Pax concludes by noting the system’s long development history and its potential for improving mill control and efficiency.

157 words

Critical Evaluation

Value of the Information & Strength of the Argument

The presentation provides valuable insights into the application of acoustic measurement for mill monitoring, offering a novel perspective that challenges existing assumptions. The argumentation is based on extensive practical experience and real-world data, which strengthens its credibility. However, the lack of detailed methodology and peer-reviewed references limits its scientific rigor. The speaker effectively demonstrates the potential of acoustic techniques to reveal internal mill dynamics, but the argument would benefit from more quantitative comparisons and independent validation.

Scientific Rigor, Source Quality, Title Accuracy

The speaker is a recognized expert in the field, and the presentation draws on decades of research and industrial applications. However, the video does not cite specific scientific papers or external sources, relying primarily on anecdotal evidence and personal experience. The title accurately reflects the content, which is focused on comminution considerations. The presentation is well-structured and technically detailed, but the lack of formal citations reduces its scientific robustness.

160 words

Title / Content Match

The title accurately reflects the content, which focuses on comminution considerations, particularly acoustic measurement.

Quality & Reliability

8/10

The speaker is a domain expert with decades of experience, and the presentation is based on extensive real-world data and validation. However, it is largely anecdotal and lacks peer-reviewed references in the video itself.

Key Moments

Cited Sources

Concurring Sources

  • SMI Webinars — The seminar series is part of the Sustainable Minerals Institute's outreach.

Contribution & Novelties

The presentation introduces a novel approach to mill monitoring using acoustic arrays, providing real-time insights into internal conditions that were previously inaccessible. The discovery of top-space impacting challenges existing trajectory models and suggests the need for revised understanding of mill dynamics. The system’s ability to measure ball-to-rock ratio and load directly from acoustic signals offers a more accurate alternative to traditional proxies.

Pour aller plus loin :

  • Comminution — Provides background on the process of reducing particle size.
  • SAG mill — Overview of semi-autogenous grinding mills.
  • Discrete element method — Numerical method used for simulating particle interactions in mills.

99 words

Radar Profile

The radar profile shows high scores in quantity and quality of information, reflecting the speaker's expertise and the depth of content. The technical level is also high, indicating a specialized audience. The overall reliability is strong, but the lack of formal citations slightly reduces the score.

Reliability 8/10