News (Letzte 12 Monate)
Posted on 06.11.2018 by dmichaelis
Copper Extraction from Seafloor-Massive-Sulfides from the German License in the Indian Ocean Completed
IME successfully conducted a thorough R&D project for the German Federal Institute for Geosciences and Natural Resources (BGR) in 2018. For the project a Massive-Sulfide sample from the German license area in the Indian Ocean (so called Kairei hydrothermal vent field) in about 2000 m depth was collected by BGR and delivered to IME for metallurgical tests. The sample mostly consists of chalcopyrite and copper-sulfides with an average copper-content of 39%. On the one hand the classic pyrometallurgical processing route (matte-smelting and converting) was investigated in a lab-scale, on the other hand oxidative leaching trials were carried out under increased pressure in an autoclave system as well as under atmospheric conditions. The project proved that this “new” deep-sea ore can be processed with high copper extraction rates similar to the processing of copper-concentrates, as was expected.