Poling process is used for:

it is used for removing Cu and Cu2O3Cu2O+CH4⟶6Cu+CO+2H2OIn the poling method, metals having oxide impurities are purified. Here the molten impure metal is stirred with green poles of wood. These poles are a rich source of hydrocarbon gases. These hydrocarbon gases reduce oxides (impurities), e.g., in the purification of Blister copper.