Method for potential-controlled separation and enrichment of tellurium in copper anode slime

The invention discloses a method for potential-controlled separation and enrichment of tellurium in copper anode slime. The method comprises the steps of stirring and mixing the copper anode slime and concentrated sulfuric acid according to a center ratio, roasting under different temperature gradients, carrying out ball milling on the roasted product to a required particle size, adding hydrogen peroxide and carrying out oxidation leaching in a dilute sulfuric acid solution in the potential controlling way, adding copper powder to a copper leaching liquid and replacing in the potential controlling way, enriching the tellurium in the replacement residue and recycling copper through carrying out electrodeposition on the replaced liquid. The essence of method disclosed by the invention is that the purposes that the oxidation leaching process and the copper powder replacing process are adjustable and controllable are respectively realized in the potential controlling way; the leaching rates of the copper and the