The comminution process, particularly grinding, is very important in the mineral processing industry. Some characteristics of ore particles, which occur as a product of grinding process, have a significant impact on the effects of further ore processing. At the same time, this process requires a significant amount of energy which significantly affects the overall processing costs. Therefore, in this paper, we propose new multiple criteria decision making model, based on the Ratio system part of the MOORA method, which should enable an efficient selection of the adequate comminution circuit design.

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IzvodNajčešće primenjivani postupak u pripremi polimetalične rude i rude barita je gravitacijska koncentracija, kao predtretman flotacijskoj metodi koncentracije. Ona se zasniva na razlici u gustinama korisnih i ostalih prisutnih mineralnih komponenata i na različitim putanjama kojima se kreću zrna različitih gustiina u gravitacionim mašinama i uređajima. Sprovedena istraživanja mogućnosti primene gravitacijske koncentracije na dostavljenoj polimetaličnoj masivno sulfidnoj baritskoj rudi, između ostalog, obuhvataju oglede koncentracije na klatnom stolu na određenim užim klasama krupnoće. Prethodno je izveden, na reprezentativnom uzorku rude, preliminarni ogled pliva-tone u teškoj tečnosti-bromoformu. Nakon procesuiranja na klatnom stolu, dobijeni rezultati su laboratorijski obrađeni i dati na hemijsku analizu. Ključne reči: gravitacijska koncentracija, pliva tone analiza, klatni sto * Institut za rudarstvo i metalurgiju Bor, Zeleni bulevar 35 ** Ovaj rad je proistekao kao rezultata Projekta TR-33023 "Razvoj tehnologija flotacijske prerade ruda bakra i plemenitih metala radi postizanja boljih tehnoloških rezultata", koga finansira Ministarstvo za prosvetu, nauku i tehnološki razvoj Republike Srbije M1 J M2 K Voda Uzorak M1 J M2 K Voda Uzorak``U` Sl. 2. Šema toka druge serije ogleda gravitacijske koncentracije No 4, 2012. MINING ENGINEERING 211 MINING AND METALLURGY INSTITUTE BOR YU AbstractThe gravity concentration is the most commonly used method in the preparation of polymetallic ore and barite ore, as a pretreatment of flotation concentration method. It is based on a difference in densities of useful and other present mineral components present and different travel paths of grains with different densities in the gravity machine and devices.Conducted research the possibility of gravity concentration use on submitted polymetallic massive sulfide barite ore, among others, include the experiments of concentration on a shaking table on the certain narrow size classes. The preliminary experiment floating-sinking was previously performed on a representative sample of ore in a heavy liquid -bromoform.After processing on a shaking table, the obtained results were processed in the laboratory and chemically analyzed.

This work presents the results of the Bond work index in a ball

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