Process for preparing inert anode material or inert cathode coating material for aluminium electrolysis

Abstract

The disclosure provides a process for preparing an inert anode material or inert cathode coating material for aluminium electrolysis, which includes the following steps: A) putting aluminium into a reactor, injecting an inert gas to the reactor after vacuumizing, adding the mixture of dried fluoborate and fluorotitanate in the reactor to enable a reaction to form titanium boride and cryolite, and isolating the titanium boride; and B) melting the obtained titanium boride with a carbon material, tamping the melt liquid on a carbon cathode surface, sintering the carbon cathode surface to form the inert cathode coating material for aluminium electrolysis; or, mixing the obtained titanium boride with the carbon material evenly, then high-pressure moulding the mixture, and finally sintering the moulded mixture at a high temperature to form the inert anode material for aluminium electrolysis.

What is claimed is: 
     
         1 . A process for preparing an inert anode material or inert cathode coating material for aluminium electrolysis, which includes the following steps:
 A) putting aluminium into a reactor, injecting an inert gas to the reactor after vacuumizing, heating the reactor to a temperature of between 700 and 800 DEG C., adding the mixture of dried fluoborate and fluorotitanate in the reactor and stirring quickly to enable a reaction for 4 to 6 hours to form titanium boride and cryolite, then isolating the titanium boride; and   B) melting the obtained titanium boride with a carbon material, tamping the melt liquid on a carbon cathode surface, sintering the carbon cathode surface to form the inert cathode coating material for aluminium electrolysis; or, mixing the obtained titanium boride with the carbon material evenly, then high-pressure moulding the mixture, and finally sintering the moulded mixture at a high temperature to form the inert anode material for aluminium electrolysis.   
     
     
         2 . The process for preparing the inert anode material or inert cathode coating material for aluminium electrolysis according to  claim 1 , wherein the carbon material is one or more of carbon, graphite, asphalt and resin. 
     
     
         3 . The process for preparing the inert anode material or inert cathode coating material for aluminium electrolysis according to  claim 1 , wherein the fluoborate adopts potassium fluoborate and the fluorotitanate adopts potassium fluotitanate. 
     
     
         4 . The process for preparing the inert anode material or inert cathode coating material for aluminium electrolysis according to  claim 3 , wherein the carbon material is one or more of carbon, graphite, asphalt and resin. 
     
     
         5 . The process for preparing the inert anode material or inert cathode coating material for aluminium electrolysis according to  claim 1 , wherein the fluoborate adopts sodium fluoborate and the fluorotitanate adopts sodium fluotitanate. 
     
     
         6 . The process for preparing the inert anode material or inert cathode coating material for aluminium electrolysis according to  claim 5 , wherein the carbon material is one or more of carbon, graphite, asphalt and resin. 
     
     
         7 . The process for preparing the inert anode material or inert cathode coating material for aluminium electrolysis according to  claim 1 , wherein the inert gas is argon gas. 
     
     
         8 . The process for preparing the inert anode material or inert cathode coating material for aluminium electrolysis according to  claim 7 , wherein the carbon material is one or more of carbon, graphite, asphalt and resin.