ArcelorMittal Spain has started a new coke plant in Gijon in 2020. To minimize burning the coke oven gas in a powerplant and then emit CO2 at the boiler stack, it has been decided to use this gas for injection in the blast furnaces, in substitution of coal.
A double positive effect is created by substituting carbon by hydrogen in the blast furnace (the coke oven gas contains 65% hydrogen) and avoiding the CO2 emission from the gas burning.
• Investment cost : 30M€
• 45000NM3 coke oven gas injected in the BF
• Up to 12% of fossil carbon substitution
• Start phase 1 (15000NM3/h) in 2020 and Phase 2 (additional 30000NM3/h) in 2022
This technology is first step and can be easily completed with green hydrogen injection when this will become available and affordable. It will be developed as well in other European ArcelorMittal integrated plants. The Spanish administration is funding part of this project.
Wim Van der Stricht