Aluminium Electrode Connection Using Conductive Particles
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing methods for fixing electrodes in aluminum electrolysis cells, particularly the use of melted cast-iron, are costly, time-consuming, and inefficient, requiring preheating and resulting in the frequent replacement of anodes and cathode blocks due to carbon consumption, with associated challenges in disposal and recycling.
Innovation Solution
The use of electric conductive particles, such as steel balls or other metals, without a hardening matrix, to fill the spaces between the electrodes and the fixing components, providing improved electrical resistance and mechanical strength, allowing for easier re-use and reduced operational costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If melted cast-iron is used to fix electrodes to studs or collector bars, then mechanical strength of the connection is improved, but device complexity and operational cost increase due to required ovens, distribution systems, and preheating procedures
Solution Approach 1:
The patent extracts the hardening matrix component from the contact paste formulation, using only electric conductive particles without any binder or hardener. This eliminates the need for complex heating and hardening infrastructure while maintaining electrical conductivity and mechanical functionality through the particles alone
Solution Approach 2:
The invention employs simple electric conductive particles that can be easily applied and do not require expensive infrastructure. The particles serve their function without needing complex support systems, effectively replacing the need for costly ovens, distribution systems, and preheating equipment
2Strength
If melted cast-iron is used to fix electrodes, then mechanical strength is improved, but loss of time increases due to preheating requirements and complex assembly procedures
Solution Approach 1:
The electric conductive particles are pre-prepared in their final form without requiring any subsequent hardening or heating actions. They can be directly applied to the connection interface and immediately serve their function, eliminating time-consuming preheating and hardening steps
Solution Approach 2:
By removing the hardening matrix and binder components from the contact paste, the invention eliminates the time required for heating and hardening processes. The particles work immediately upon application, significantly reducing assembly time
3Strength
If contact paste with hardening matrix is used to join electrode components, then mechanical strength is improved, but ease of manufacture deteriorates due to inability to reuse the material
Solution Approach 1:
The patent removes the hardening matrix and binder from the contact paste formulation, leaving only electric conductive particles. This extraction makes the material reusable since the particles can be recovered and reapplied without degradation, eliminating the disposal problem associated with cured contact paste
Solution Approach 2:
The electric conductive particles can be easily recovered from used connections and reused for subsequent fixations. This recovering capability transforms the joining material from a single-use consumable into a reusable resource, improving ease of manufacture and reducing waste
4Ease of manufacture
If electric conductive particles without hardening matrix are used, then ease of manufacture and reusability are improved, but mechanical strength may be compromised
Solution Approach 1:
The invention changes the physical and chemical parameters of the contact material by using only electric conductive particles without binders or hardeners. This parameter change enables reusability while the high conductivity and particle-to-surface contact compensate for the lack of matrix binding
Solution Approach 2:
The electric conductive particles provide uniform distribution and consistent electrical properties across the connection interface. The homogeneity of particle composition ensures reliable performance without requiring complex multi-component formulations
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enhances the electrical resistance and mechanical strength of the electrode connections, reducing the frequency of replacements and simplifying the recycling process, while minimizing the environmental impact and operational expenses.
Implementation Method 1
The space between the stud and the bore is filled with electric conductive particles, such as steel balls or other metals, without a hardening matrix
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An electrode for use in an electrolysis process for production of aluminium, the electrode (3, 20) comprises a body of calcinated carbonaceous material connected with an electrical current lead (1, 21). The current lead is embedded in a recess in said carbonaceous body. The recess is wider than the lead and being filled with an electric conductive material. The electric conductive material comprises conductive particles (4, 4'). The method relates to the production of such an electrode and recovery of the conductive material after the electrode has been worn out.