Compact Electrolysis Apparatus for Iron Metal Production
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Solution Overview
Problem
Current electrochemical iron production methods require large electrodes, leading to high costs and inefficiencies, and existing steel production routes emit significant CO2, necessitating a more productive and cost-effective, carbon-neutral method.
Innovation Solution
An apparatus with a casing containing a terminal gas-permeable anode plate, bipolar electrodes with gas recovery parts, and a terminal cathode plate, allowing for efficient electrolysis of iron ore with a circulating electrolyte and gas outlet, optimized for reduced electrode size and renewable energy use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If large electrodes are used to ensure good productivity in electrolysis, then productivity is improved, but device complexity and cost increase
Solution Approach 1:
The patent divides the electrode system into multiple bipolar electrodes arranged in series between terminal anode and cathode plates. Each bipolar electrode contains an anode plate, metallic plate, and cathode plate stacked together. This segmentation allows the system to achieve high productivity through multiple active surfaces while keeping individual electrode components manageable in size and complexity.
Solution Approach 2:
The patent transitions from a single-plane electrode configuration to a three-dimensional stacked arrangement. Bipolar electrodes are constructed by stacking anode plates, metallic plates, and cathode plates in vertical layers, creating multiple electrolyte chambers in series. This dimensional change increases the total active surface area for electrolysis without increasing the footprint, thereby improving productivity while controlling device complexity.
2Productivity
If traditional blast furnace method is used to produce pig iron, then production scale is achieved, but CO2 emissions increase significantly
Solution Approach 1:
The patent replaces the thermal-chemical reduction process of blast furnaces with an electrochemical electrolysis process. Instead of using coke as a reducing agent at high temperatures, the system uses electric current passed through an electrolyte to reduce iron oxides to metallic iron. This substitution eliminates the need for fossil fuel-based reduction, achieving carbon-neutral iron production while maintaining industrial-scale productivity.
Solution Approach 2:
The patent changes the fundamental operating parameters from high-temperature thermal processing to ambient or moderate-temperature electrochemical processing. The electrolysis process operates at significantly lower temperatures than blast furnaces, using electrical energy to drive the reduction reaction Fe2O3 + 6H+ → 2Fe + 3H2O. This parameter change enables carbon-neutral production while achieving scalable output.
3Object-generated harmful factors
If direct reduction methods are used to produce sponge iron, then CO2 emissions are reduced, but carbon fossil fuels are still required
Solution Approach 1:
The patent replaces gas-based direct reduction methods with electrochemical electrolysis. Instead of using carbon monoxide generated from fossil fuels to reduce iron oxides, the system uses electricity to drive the reduction reaction. This substitution eliminates dependency on carbon fossil fuels while maintaining low CO2 emissions, achieving truly carbon-neutral iron production.
4Ease of manufacture
If bipolar electrodes with gas recovery parts are implemented, then gas management is improved, but device complexity increases
Solution Approach 1:
The patent merges the gas recovery function directly into the bipolar electrode structure. Gas recovery parts are integrated with the anode and cathode plates, allowing oxygen and other gases produced during electrolysis to be collected and removed efficiently. This integration improves gas management while avoiding the need for separate, complex gas handling systems, thereby balancing ease of manufacture with controlled device complexity.
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
The apparatus enhances productivity and reduces costs by enabling efficient electrolysis of iron ore with reduced electrode size and minimizes CO2 emissions by utilizing renewable energy, improving the carbon footprint of iron production.
Implementation Method 1
production of iron metal through reduction of iron ore by an electrolysis reaction
Implementation Method 2
terminal gas-permeable anode plate
Data Source
AI summary
An apparatus (1) for the production of iron metal through reduction of iron ore by an electrolysis reaction the apparatus including a casing (4) including successively a terminal anode plate (2) at a first end of the casing (4), such anode being connected to a source of electric power, at least one bipolar electrode (11) including successively a cathode plate (3), a metallic plate (12), a gas recovery part (8) and a gas permeable anode plate (2) and a terminal cathode plate (3) at the other end of said casing (4), such cathode being connected to the source of electric power.