Process for preparing battery grade metal sulphate solutions

A process for preparing battery grade metal sulfate solutions, wherein electrolytically produced metal objects are introduced in a first direction and subjected to an aqueous leaching solution at an elevated temperature and acid pH in a continuous process with mixing, said leaching solution comprising at least one acid leaching agent and an oxidizing agent in liquid form, wherein said mixing is achieved by recirculating the aqueous leaching solution that is introduced in a second direction through a leaching column operating in counter-current mode, said second direction being opposite said first direction, said electrolytically produced metal objects being introduced in said first direction at a top of said leaching column while said leaching solution is being introduced in said second direction at a bottom of said leaching column, said bottom being opposite said top, and said opposing direction of introduction at said top and said bottom, respectively, and said counter-current mode resulting therefrom causing shearing and enhancing leaching.