Inert Anode Electrolytic Cell for Aluminum Production

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Traditional aluminum smelting methods using Hall-Héroult electrolytic cells consume carbon anodes, generating greenhouse gases like CO2 and CF4, and are limited by anode shape and size, leading to inefficiencies in alumina electrolysis.

Innovation Solution

The use of vertically oriented anode and cathode modules with adjustable positions to optimize anode-cathode distance and overlap, allowing for uniform electrolysis and reduced gas emissions, featuring inert anodes and wettable cathodes in an electrolytic cell configuration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If traditional carbon anodes are used in Hall-Héroult electrolytic cells, then aluminum production is achieved, but greenhouse gas emissions (CO2 and CF4) are generated

Engineering Contradiction:

Improvealuminum productionVSAvoidgreenhouse gas emissions

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

The patent changes the chemical composition parameter of the anode from carbon-based to inert material-based, fundamentally altering the electrochemical reactions to eliminate CO2 and CF4 generation while maintaining aluminum production efficiency

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent introduces inert anodes that create an inert electrochemical environment, preventing the formation of greenhouse gases by using materials that do not react with oxygen to form CO2 or CF4, thus eliminating harmful emissions

Inventive Principle:

Principle #39Inert atmosphere (Inert environment)

2Productivity

If traditional carbon anodes with fixed shapes and sizes are used, then aluminum production is achieved, but electrolysis efficiency is limited due to non-uniform alumina consumption

Engineering Contradiction:

Improvealumina electrolysis efficiencyVSAvoiduniformity of alumina electrolysis

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The patent divides the anode structure into multiple segments or zones with varying geometries, allowing different regions to optimize alumina consumption patterns and achieve more uniform electrolysis across the entire electrode surface

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent employs adjustable anode positions and configurations that can be dynamically modified during operation to maintain optimal electrolysis conditions and uniform alumina consumption as the process progresses

Inventive Principle:

Principle #15Dynamics

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 configuration enhances aluminum production efficiency, reduces greenhouse gas emissions, and improves the purity of aluminum metal produced, achieving higher production rates and lower pollutant generation.

Implementation Method 1

produce aluminum metal by the electrolysis of alumina

Methodology Applied

Scientific EffectElectrolysis: Electrolysis

Implementation Method 2

reduced by a DC electric current

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Data Source

PatentUS11585003B2Electrode configurations for electrolytic cells and related methods

Publication Date: 2023.02.21 ELYSIS LLP

AI summary

An electrolytic cell for producing aluminum metal is disclosed. The electrolytic cell comprises at least one anode module having a plurality of anodes and being supported above a corresponding at least one cathode module having a plurality of cathodes, the at least one anode module being supported by a positioning apparatus configured to move inside the cell for selectively positioning the plurality of anodes within the electrolytic cell relative to adjacent cathodes in order to adjust an anode-cathode distance (ACD) and/or an anode-cathode overlap (ACO). Preferably, the anodes are inert or oxygen-evolving electrodes for an eco-friendly or “green” production of a metal, such as aluminum (or aluminium).