Recovery of Copper and Cobalt from Spent Aerospace Material with Pollution-Free Oxidant

Abstract

The acid leaching of spent aerospace material with pollution-free oxidation is discussed. Effect of parameters including initial concentration of hydrochloric acid solution, leaching temperature, reaction time, agitation speed, liquid to solid ratio and concentration of oxidant on valuable element extractions are determined, the optimized conditions are 6 M, 60 °C, 30 min, 250 r/min, 6:1 and 0.0378 mol•L-1•min-1, respectively. The comprehensive results of experiments show that the extracting efficiency of Co and Cu are over 83% and 98% respectively when optimized conditions were adopted.

Extraction/Separation of Cobalt by Solvent Extraction: A Review

“…The desire to conserve resources and energy, to reduce wastes and the costs of disposing from mining and mineral processing, to reduce levels of such hazardous materials as cadmium in NiCd batteries from the environment, address urban mining notions and to demonstrate an environmentally responsible image; environmental regulations; and periodic increases in the price of cobalt play a role in promoting cobalt recycling and recovery [67]. Recycling of cobalt from various like scrap lithium ion battery [68][69][70][71][72][73][74][75], spent Ni-Cd batteries [76], spent Ni-MH batteries [77][78][79][80], spent aerospace material [79], spent Co/Mo/-Al2O3 catalysts [80], and Co-based alloy scraps [81] have been reported in the literature. Among all the lithium ion battery recycling through hydrometallurgy using solvent extraction is quite common and fairly applied in the industries [82][83][84][85][86][87].…”