Oxidation energy-saving method for recycling aluminium ions and sulphuric acid of oxidation tank and improving current density

The invention discloses an oxidation energy-saving method for recycling aluminium ions and sulphuric acid of an oxidation tank and improving current density. The method comprises an oxidation solution circulating cooling step, an aluminium ion crystal product recycling step, a sulphuric acid oxidation solution recycling step, a gas stirring step, a defrosting step and a current density adjusting step; the current density adjusting step comprises the following steps: adjusting the flow of a variable frequency pump to be that the oxidation solution is circulated not more than six times every hour; adjusting the current density in an anodic oxidation tank. The invention provides an oxidation energy-saving method for recycling the aluminium ions and the sulphuric acid of the oxidation tank and improving the current density, the oxidation current density is improved, the oxidation time is shortened, the dissolving amount of oxidation films is reduced, and the oxidation energy consumption is reduced for the first t