Abstract: This paper presents the results obtained by determination of Bond rod mill work index (RWi), on a very low-grade copper ore, containing only 0.13% Cu. The standard Bond rod mill grindability test is performed in this research. RWi depends primarily on the mechanical properties of material conditioned by mineralogical composition and the desired particle size of the ground material. The mineralogical composition of the considered sample included the following metallic ore minerals: pyrite, chalcopyrite, hematite, magnetite, covelline, chalcocite, bornite, sphalerite and rutile. Tailings was presented by quartz, calcite, anhydrite, gypsum and clay minerals. The closing sieve size was 1,18 mm. The obtained value of RWi was 19 kWh/t, and therefore this ore can be classified as hard. https://unilib.phaidrabg.rs/o:5970 cobiss:138149897 ISBN: 978-86-6305-140-9 Jovanović, Ivana Conić, Vesna Milanović, Dragan Kržanović, Daniel Stanković, Tanja Urošević, Daniela Janošević, Miloš 2023 info:eu-repo/semantics/conferenceProceedings Keywords: bond rod mill work index, grindability, low-grade copper ore. eng Proceedings International October Conference on Mining and Metallurgy (54 ; 2023 ; Borsko jezero) startpage: 460 endpage: 463 application/pdf 2387226 bytes All rights reserved Determination of bond rod mill work index of a very low-grade copper ore