Australian Calix Limited has announced that it has received a AUD 947,035 grant from the Australian Renewable Energy Agency, providing approximately 48% of the funding for an 11-month study for a Zero Emissions Steel Technology, ZESTY, iron demonstration plant. Calix Limited plans to build an annual 30,000 tonnes renewably powered ZESTY-iron plant, which will produce green hydrogen for the direct reduction of iron ore to sponge iron. ZESTY can be electrically heated and is compatible with intermittent sources of renewable generation and grid load balancing applications. The unique, indirect heating approach not only enables efficient electrification, but also removes sources of combustion and the generation of hydrogen-oxygen flames, allowing a simpler design and processing at significantly lower temperatures than a conventional BF. Unlike other direct reduced iron technologies, Calix’s indirect heating of the reduction reaction with renewable power means hydrogen is not consumed as a fuel, only as a reductant, and is easily recycled in the process. As such, ZESTY is targeting the minimum hydrogen use of 54kg of hydrogen per tonne of iron, enabling more efficient and economical production of green iron and steel. ZESTY’s ability to handle small particle sizes has the potential to more easily remove impurities compared with other processes, which require pelletised and typically higher grade iron ores. Further testing and validation of this potential is underway. ZESTY iron aims to enable steel producers to add green iron directly into their existing processes to provide a simple and efficient route to emissions reduction. ZESTY steel aims to enable steel producers to add ZESTY directly into their process to produce lower carbon, and ultimately zero emissions steel products.