The reduction of the world reserves of conditioned copper ores leads to the involvement in the production of mixed raw materials, and it requires the search for alternative technological solutions. This trend is widespread in the field of rebellious copper ores in Kazakhstan on to the full extent.
Regarding the main problems which are encountered in the processing of rebellious copper ores are the presences of copper in the oxide and sulfide forms. This leads to large losses of copper with tails when using flotation beneficiation schemes, as well as the difficulty of separating copper minerals from the remaining sulfides due to their fine germination.
Analysis of processing methods for copper rebellious ores that contain increased amount of oxidated minerals proves that it’s possible to use methods of hydrometallurgy. In most cases these methods provide positive results in comparison with flotation concentration.
The object of research was the rebellious copper-bearing ore with an average copper content of 0,7–1,0%. The ratio of oxide and sulfide forms of copper mineral fluctuated from 1,2:1 to 1,4:1. In terms of oxygen-bearing copper minerals, it is constituted 48–50%, while for sulphide minerals it consists of 40– 42%.
This paper presented the results of studies of sulfuric acid opening up of refractory copper ores. The effect of sulfuric acid concentration, temperature and process duration was studied. The results of the experiments are shown that industrially acceptable copper recovery is around with 83-84%.
|Position of speaker||научный сотрудник|
|Publication||IOP Conference Series: Earth and Environmental Science|
|Affiliation of speaker||Восточно-Казахстанский государственный технический университет им. Д. Серикбаева|