Surface scale eliminating method for anode guide rod in aluminium electrolysis

Abstract

The present invention features that the crimping surfaces of the bus bar and anode guide rod are cleaned with the cleaning liquid comprising dodecyl benzene sulfonic acid 1-20 wt%, alkali metal hydroxide 0.5-12 wt%, triethanolamine, 1-25 wt%, JFC 0.1-10 wt%, calgon 0.5-10 wt%, ethanol 5-10 wt%, non-ionic surfactant 1-18 wt% and butylcellusolve 5-10 wt% and water (the balance). Washing the anode guide rod with the cleaning liquid can reduce the electrode voltage obviously, lower the power consumption of electrolyzing aluminium greatly.

Description

Technical field

[0001] The invention belongs to the technical field of descaling the surface of an electrolytic aluminum anode guide rod. Background technique

[0002] In the process of producing electrolytic aluminum by electrolysis, a dirt layer is prone to occur on the surface of the anode guide rod. This layer of dirt has a complex composition, and its existence greatly affects the electrical conductivity of the electrode, especially on the crimping surface between the bus bar and the anode guide rod. Above, if there is a dirt layer, it will directly affect the efficiency of electrical conduction, increase the power consumption during the conduction process, and increase the production cost of aluminum. However, because there is currently no good way to remove this layer of dirt at a lower cost, many factories have not descaled the surface of the anode guide rod, so the power consumption of aluminum production cannot be reduced, which directly af...