Innovation practice in coupling application of new advanced technologies of Hydrogen-Oxygen-Intelligent combustion to achieve Net-Zero-Carbon manufacturing of high-end special steel

Efficient and high-quality heating is crucial for the performance, quality, energy conservation, and environmental sustainability of special steel products during manufacturing.A decarbonization pioneer project focused on the research and coupling application of up-to-date combustion technologies has initiated and completed in conjunction with multiple parties .The project completed the engineering study and verification of up-to-date combustion technologies including oxygen-fuel combustion, hydrogen/bio-gas combustion ,intelligent combustion applied in the whole iron and steel making processes concerning heating like BF and BF hot stove, ladle/ tundish baking, rolling/forging reheating, heat treatment,etc.Then,several pilot sub-projects with multi-technology coupling application were initialed to establish optimal combustion model matching different properties of special steels, different fuels and different media,finally helped reduction of energy consumption and CO2 emissions as well as efficiency promotion to the hilt ,with the objective of ensuring product quality,so as to achieve balanced development of steel carbon reduction benefits and economic benefits.The current focus is on promoting the implementation of those technologies and advancements across the entire group, aiming to enhance comprehensive, efficient, and cost-effective carbon reduction in steel manufacturing heating processes.As one of typical sub-project, “All oxygen hydrogen +hydrogen+intelligent reheating furnace” finally reduce energy consumption by 41.09% and CO2 emissions by 78.26%,meanwhile the cost reduces by 35.2% and This evaluation is based on industrial by-product hydrogen as routine fuel. It can be adjusted to 100% green hydrogen at any time to achieve zero carbon emissions of the process, and finally achieve near-zero carbon production of recycled steel together with 100% recycle steel + 100% green energy .The project provides important support for developing low-carbon products and building low-carbon brands, and sets a model for scientific and sustainable decabonization in steel and other energy-intensive and high-emission industries.