Researchers at the University of New South Wales (UNSW) are developing a new method to reduce carbon emissions in steelmaking by retrofitting existing blast furnaces. The project, led by the university’s Shen Lab, utilizes the Renewable Injections-Sustainable Burdens (RISB) process to integrate hydrogen-bearing gases and bio-based materials into current ironmaking infrastructure, according to the Australian Renewable Energy Agency (ARENA).
How does the RISB process lower emissions?
The RISB process functions by replacing traditional carbon-heavy inputs with renewable alternatives without requiring a total overhaul of existing steel mills. According to ARENA, the research team is testing hydrogen-bearing gases and bio-based materials as injection fuels. This approach targets the high emissions inherent in conventional blast furnaces, which remain one of the most energy-intensive components of global industrial manufacturing. By focusing on retrofitting, the project aims to bypass the need for building entirely new production systems, a move that could significantly lower the capital barrier to decarbonization for Australian steel producers.
Why is this research critical for Pilbara iron ore?
Australia’s iron ore industry relies heavily on lower-grade ore from the Pilbara region, which is traditionally difficult to process in low-emission furnaces. ARENA states that the RISB process is specifically designed to maintain the use of this iron ore while lowering the total carbon footprint of the final steel product. This is a significant competitive factor for Australia. As international markets demand “green steel,” the ability to process existing ore reserves through cleaner technology ensures that Australian exports remain viable in a global economy pivoting toward net-zero manufacturing.
How does this compare to other decarbonization efforts?
Unlike some emerging technologies that require shifting to electric arc furnaces or entirely new hydrogen-based direct reduction plants, the UNSW approach works within the existing blast furnace framework.
| Approach | Infrastructure Impact | Primary Focus |
|---|---|---|
| RISB (UNSW/ARENA) | Low (Retrofit) | Existing blast furnaces |
| Green Hydrogen DRI | High (New Build) | Replacement of blast furnaces |
According to ARENA, the RISB initiative is part of the broader Transformative Research Accelerating Commercialisation (TRAC) Program, which seeks to balance immediate emissions reductions with the long-term competitiveness of the domestic iron and steel sector.
Frequently Asked Questions
What is the primary goal of the UNSW Shen Lab project?
The goal is to develop a low-emission ironmaking process that can be implemented in existing blast furnaces using renewable injection materials.
Does this process replace the need for traditional iron ore?
No. According to ARENA, the research is specifically aimed at maintaining the use of Australia’s lower-grade Pilbara iron ore while reducing the emissions associated with processing it.
What materials are being tested as alternatives to coal?
The research is investigating hydrogen-bearing gases and bio-based alternatives to replace traditional carbon-heavy injection fuels.
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