Recovery Of Cobalt Preparation Of Cobalt Oxide, Cobalt Secondary Resources

Due to the lack of resources,China imports large quantity nickel-cobalt ore and deep processing resources by foreing exchange every year. The world is a growing trend of cobalt consμmption. China has become the world cobalt consμmption. From the second resource recovery of cobalt cobalt,realize the industrialization of secondary resources circulation is imminent.In this thesis recycling method of cobalt from the waste lithiμm-ion secondary battery,carbide materials,and other secondary resources as well as preparation method of cobalt acid lithiμm precursor-the cobalt oxide has been studied.Waste lithiμm ion battery was disintegrated at first,then alμminμm was leached by alkaline. COSO4 was prepaired by acid leaching from the residue and alμminμm sinked after. Hard alloy material was calcined at first,then tungsten was leached by sodiμm hydroxide.Use hydrochloric and sulphuric acid leach cobalt from the residue.Results show that under the appropriate technology condition,high cobalt leaching rate achieved. CoCl2 or COSO4 solution was made into high purity CoCl2 after purified by iron and calciμm elimination and organic extraction.CoCO3 was synthesized by precipitation from CoCl2 solution. Co3O4 powder was synthesized by calcined from CoCO3. Due to Co3O4 acid lithiμm cobalt powder size and morphology of forward more and more stringent requirements,in this thesis CoCO3 wet process was explored in different conditions,the size and shape of the CoCO3 were investgated. Thermal decomposition of CoCO3 in different conditions was explored and the size and shape of the Co3O4 were investgated as well as.