Valorization of complex polymetallic ores in the Čoka Marin deposit

The complex polymetallic deposit 'Čoka Marin' has been explored over many years. Due to its complex mineral composition and primarily a high content of precious metals it represents a particular challenge for mining experts. Over the past few years preparatory works for the ore body Čoka Marin-1 have been intensified to provide necessary conditions to excavate and prepare the ore in the Majdanpek Flotation Plant for further metallurgical processing of the collective concentrate. The new methods that were investigated to smelt the collective copper concentrate with precious metals opened new possibilities for ore valorization. This paper presents a detailed analysis of various ore excavation methods that may be applied in the 'Čoka Marin' Deposit along with the stability analysis. Further on, the results of detailed mineralogical analysis are given to show particularly the manner in which the precious metals appear. Finally, the paper presents the research results and different possibilities of ore concentration flotation processes.