Metal ceramic-based inert anode and conductive rod connecting structure for aluminum electrolysis and preparation method thereof

Abstract

The invention belongs to the technical field of aluminum electrolysis, and discloses a metal ceramic-based inert anode and conductive rod connecting structure for aluminum electrolysis and a preparation method thereof. The connecting structure is composed of a metal ceramic-based inert anode, an intermediate alloy ingot and a metal conductive rod. According to the metal ceramic-based inert anode and conductive rod connecting structure for aluminum electrolysis and the preparation method thereof, the high-strength and stable conductive connection of the metal ceramic-based inert anode and the conductive rod for aluminum electrolysis is realized, the process is simple, operation is convenient, the corrosion resistance of the connecting structure is good, cost is low, connection is firm, andthe strength of the room temperature and the high temperature are high; the connecting structure prepared through the process method can be subjected to long-term strong impact of heat, electricity and hot corrosive gas, the connecting structure has higher connecting strength, so that the inert anode can be guaranteed to suspend in an electrolytic cell, and 0-20 A / cm<2>electric current density canbe borne; and the method has important significance for realizing industrial electrolysis application of the metal ceramic-based inert anode.

Description

technical field [0001] The invention belongs to the technical field of aluminum electrolysis, and relates to a preparation method for stably connecting a cermet-based inert anode for aluminum electrolysis with a metal conductive rod. Background technique [0002] There are many problems with the carbon anode currently used in the aluminum electrolysis industry: the carbon anode reacts during the electrolysis process, and a large amount of greenhouse gas CO is emitted. 2 And carcinogenic carbon fluorine compounds, etc., seriously pollute the environment; for every 1kg of aluminum produced, the actual consumption of carbon is about 0.42-0.65kg, resulting in a large consumption of high-quality carbon materials; the high frequency of anode replacement interferes with the thermal balance of the electrolytic cell, resulting in huge energy Consumption, and high labor intensity; there are many carbon residues in the electrolytic cell, and the consumption of fluorine salt is high, wh...

AI Technical Summary

Problems solved by technology

[0002] There are many problems with the carbon anode currently used in the aluminum electrolysis industry: the carbon anode reacts during the electrolysis process, and a large amount of greenhouse gas CO is emitted. 2 And carcinogenic carbon fluorine compounds, etc., seriously pollute the environment; for every 1kg of aluminum produced, the actual consumption of carbon is about 0.42-0.65kg, resulting in a large consumption of high-quality carbon materials; the high frequency of anode replacement interferes with the thermal balance of the electrolytic cell, resulting in huge energy Consumption and high labor intensity; there are many carbon slags in the electrolytic cell, and the consumption of fluorine salt is high, which affects the stable operation of the electrolytic cell; the uneven consumption of the bottom surface of the anode makes the distribution of the anode current uneven, and the stability of the electrolysis process is affected

Among them, the curing process of the adhesive needs to be kept warm in sections at different temperatures for a long time, and the process is cumbersome, which brings inconvenience to practical application.

In addition, brazing and diffusion welding are also commonly used to realize the connection between the conductive connecting rod and the inert anode. These two methods have certain problems in terms of corrosion resistance of the connection interface, thermal stability and electrical connection stability.

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