Preparation method for aluminum electrolysis metal anode

Abstract

Provided is a preparation method for aluminum electrolysis metal anode, including mixing metal shell powder with a thermoplastic binder to obtain a semisolid hot mixture; crushing the semisolid hot mixture to obtain metal shell feedstock granules; preheating a mold; filling preheated metal shell feedstock granules into the mold; applying pressure and heating a temperature 5-50° C. higher than a softening point temperature of the thermoplastic binder, and performing rheological pressing to obtain a metal shell green body; filling alloy inner core powder into a core part of the metal shell green body to obtain an inert anode green body with an alloy inner core; and sintering the inert anode green body with the alloy inner core to obtain an inert anode for aluminum electrolysis. It achieves near-net-shape forming of a metal anode shell with a special-shaped structure through a rheological pressing manner. By adopting a two-step sintering manner, densification of an aluminum electrolysis metal anode shell and electric connection is simultaneously completed. The process is simple in operation and short in process and the obtained anode has high strength and high precision.

Images