Study on Cu-Co Concentrate with Roast-Leaching Process

Copper and cobalt were recovered from copper and cobalt concentrates from CMSK Ltd of DR Congo with a series of processes including floatation,sulfating roasting,acidic leaching,extraction and electro-deposition(SX-EW-Co),iron removing and cobalt precipitation.The results show that the optimum roasting conditions including particle size of-0.074 mm of 90%,Na2SO4 dosage of 7.5%,temperature of 700 ℃,and roasting time of 30 min.The leaching rate of copper and cobalt is 97.61% and 95.92% respectively after the calcine is leached through the two-stage acidic leaching process.