Carbon emission mitigation is the most urgent task for steel industry. Current status and developing trends of environmental treatment and low carbon emission technologies for worldwide steel industry are reviewed and analyzed in this paper. Low carbon ironmaking technology with hydrogen partially replacing coke should be given priority for the blast furnacebasic oxygen furnace process while hydrogen-enriched shaft furnace direct reduction technology for special steel production. Based on the idea of carbon capture and utilization (CCU), chemicals production using metallurgical waste gas is the most thorough yet reasonable and sustainable way for carbon emission mitigation of the steel industry. For this purpose it is necessary to gather the technology strength of steel, chemicals, energy, information and the other related industry to implement the SCENWI (steel-chemicals-energy networking integration) CCU project with near-to-zero carbon emission to accelerate the research on metallurgical waste gas capture, transportation and treatment technology, and develop chemicals production process and products. Meanwhile, it is critical to build an intelligent manufacturing network system with close combination, collaborative management and stable running based on the industrial internet platform and effectively resolve key bottleneck problems on system complexity, dynamics and fluctuation, aiming to completely solve the carbon emission problem and promote sustainable and high-quality development of the steel industry.

steel industry  /  low carbon emission  /  low carbon blast furnace ironmaking technology  /  hydrogen-enriched shaft furnace direct reduction technology  /  carbon capture and utilization  /  steel-chemicals-energy networking integration