The Science

Publications and conferences

Relo Grinding Media has been in development for many years and we have made sure the science has been published, peer reviewed and discussed at length. We are proud to have been features in several conferences as well as publishing papers. You can read the science behind the innovation here.
Publications/Journals
The Journal of Multidisciplinary Engineering Science and Technology (JMEST)
JMEST is an international online journal of engineering, science and related fields. JMEST is governed by a distinguished International Board of Editors and serves more than a million engineers, scholars, scientists, students and information professionals worldwide.

In Vol. 4 Issue 1, January – 2017, JMEST published the paper from inventors Dr. Eng. Petar Bodurov and Eng. Vasil Genchev “Industrial Tests with Innovative Energy Saving Grinding Bodies” presenting the results of new RELO bodies – a radical change in the grinding process with undeniable advantages:http://www.jmest.org/wp-content/uploads/JMESTN42352009.pdf
In Vol. 2 Issue 9 of September 2015, JMEST published the paper from inventors Dr. Eng. Petar Bodurov and Eng. Vasil Genchev “New and More Effective Grinding Bodies for Drum Mills - Alternative of the Spherical Grinding Bodies” as analysis demonstrating that for every type of grinding material to be used a specifically shaped RELO body and thus to optimize the grinding process: http://www.jmest.org/wp-content/uploads/JMESTN42351068.pdf
The Coalition for Energy Efficient Comminution (CEEC)

CEEC is a global initiative and independent not-for-profit corporation, providing access on the most current technical scientific papers and field studies to the worldwide mining industry. CEEC is led by a board of directors, and enjoys the patronage of industry luminaries from reputable mining associations and global companies like Rio Tinto.

After a long process of analysis and evaluation (more than a year), CEEC approved and published in August 2018 the Official Report of the industrial tests of grinding bodies RELO (Model M1.1) in Europe (Bulgaria - Rudozem) “Industrial Tests with Innovative Energy Saving Grinding Bodies”, thus confirming the energy-efficient advantage of our innovative product:
https://www.ceecthefuture.org/resources/industrial-tests-with-innovative-energy-saving-grinding-bodies





A Comparative Study of Energy Efficiency in Tumbling Mills with the Use of Relo Grinding Media

An evaluation of Relo grinding media ("RGM") performance versus standard grinding media (balls) was made through a series of grinding tests, including a slight modification of the standard Bond test procedure. Standard Bond tests showed a reduction in the Bond ball mill work index (wi) of the mineral sample used in this study when using RGM. The modified Bond test procedure is based on using the standard Bond ball work index test but changing the circulating loads (350%, 250%, 150%, 100%). The comparative tests with RGM were carried out at the same number of revolutions as the grinding tests with balls at respective circulating load. The RGM charge yielded a 14% higher net undersize product than balls, which hints at improving energy efficiency and the potential for significant mining industry benefits.

Published in MDPI, April 2021.
A Comparative Study of Energy Efficiency in Tumbling Mills with the Use of Relo Grinding Media

Conferences
The 12th International Comminution Symposium (Comminution '21)
Comminution '21 was organized by Minerals Engineering International (MEI). MEI's Comminution conferences are established as the main events for profiling cutting-edge research and innovation in all aspects of crushing, grinding and ultrafine grinding in the minerals industry. MEI presents industrially based research papers showing the benefits of basing practical application on scientific rigour, such as the industrial validation of models and control techniques.
The report Rethinking Grinding Efficiency in Ball Mills by Dr R. Chandramohan, N. Kolev, Dr N. Weerasekara, G. Lane, presented at Comminution 2021, provides insights on the opportunity that RELO media in combination with optimized liner design can increase the grinding efficiency in ball mills by 10% for equivalent ball media volume. The report includes insightful lab test-data by RELO, and DEM simulations and analysis by Weir Minerals. The report was presented at Comminution 2021 also thanks to Ausenco.
Download: Report RELO Grinding bodies - Comminution Symposium 2021
The 52nd Annual Canadian Mineral Processors Conference
The Canadian Mineral Processors (CMP) conference, held every year, is one of the world's largest gatherings of the mineral processing community.

The report "Assessing the response of tumbling mills to the replacement of balls by RELO Grinding Media (RGM). Part 1. Comparative bench-scale experiments and demonstration full-scale test" by Prof. Phd. Dipl. Eng. P. Bodurov, Eng. Vasil Genchev, Eng. Nikolay Kolev, Ph.D. Donald P. Leroux was submitted for the 2020 CMP Conference.
Download:Report RELO Grinding bodies - Canada Conference 2020
Download: Presentation of RELO Grinding media (RGM) - Canada Conference 2020
The International Conference on Mining, Material, and Metallurgical Engineering (MMME)
MMME is the leading annual conference in fields related to mining, material and metallurgical engineering. MMME gathers experts from all over the world to present advances and exchange ideas in the field of mining. In August 2014 in Prague, Czech Republic we presented "The Comparative Analysis of the Parameters of Spherical and Relo Body Balls for Drum Mills by Prof. Phd. Dipl. Eng. P.Bodurov, Prof. T.Penchev." Publication: http://avestia.com/MMME2014_Proceedings/papers/144.pdfDownload (in Bulgarian)Comparative Study Report BG 23.07.2013.pdf
The International Mineral Processing Council (IMPC)
IMPC gathers over 1,500 mineral processing experts, academics and industry professionals from more than 60 countries. In 2010,  at the XXVth International Mineral Processing Congress in Brisbane, we presented the paper of Prof. Phd. Dipl. Eng. P.Bodurov, Prof. T.Penchev, Prof. L.Tzotzorkov, Prof. L.Kuzev, “Comparative studies on balls versus spheroidal tetrahedrons working media to ore grinding in an industrial drum mill”. Also published by AusIMM.
Download: Comparatives studies Industrial Drum Mill 10.09.2010.pdf
SGS and UMG Bond Mill Test
The internationally regarded Swiss company SGS is the world’s leading inspection, verification, testing and certification company - recognized as the global benchmark for quality and integrity. SGS together with the University of Mining and Geology performed Bond Mill work index test and published a report in January 2014 of the results of Limestone & Anthracite Coal using the Bond Work Index Determination Method:
SGS and UMG test report A - limestone RELO C1 Bond MIll 30.01.2014.pdf
SGS and UMG test report B - limestoneRELO C1 Bond MIll 30.01.2014.pdfSGS and UMG test report A - anthracitecoal RELO C1Bond MIll 04.06.2014.pdfSGS and UMG test report B - anthracitecoal RELO C1 Bond MIll 04.06.2014.pdf
SGS Industrial mill tests
In 2017 SGS performed industrial tests of RELO Grinding Media by comparing the results of milling in a comparison of a mill filled with 60mm balls and of Relo Grinding Media, publishing the following certificates and reports: SGS Certificate Lead-Zinc ore in bulk - RELO M1.1 Industrial test 01.01.2017.pdfSGS Industrial test report 01.01.2017.pdf
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