"Double carbon" goal to promote low carbon steel

When it comes to low-carbon technologies in the iron and steel industry, we have to mention that hydrogen direct reduction ironmaking, which is commonly referred to as a type of hydrogen metallurgy, is recognized as one of the paths that can realize ultra-low carbon ironmaking. Hydrogen direct reduction ironmaking refers to the process of using hydrogen to reduce solid phase iron ore (hematite, magnetite, etc.) to produce direct reduced iron. The direct reduced iron obtained under this condition contains many micropores, similar to sponge, and is often called 'sponge iron'. Sponge iron is highly active and easily oxidized/burned in the air. To reduce the oxidation of sponge iron, usually The sponge iron is pressed into a block product to reduce its specific surface area and reactivity.

Since my country's iron and steel smelting technology is mainly based on the long process of blast furnace-converter, that is to say, the blast furnace ironmaking process is the main carbon emission unit, accounting for about 74% of the total carbon emission. Carbon as a reductant and heat source produces a lot of carbon dioxide, so the key to reducing emissions is carbon feedstock substitution and process changes. Therefore, it is an effective way to develop short-process technology for scrap steel recycling, oxygen-enriched blast furnace, co-production of tempering, and utilization of waste heat and waste energy.

In the face of the carbon reduction needs of the steel industry, the support of policies and enterprises is also indispensable.

Under the requirements of "carbon peaking" in 2030 and "carbon neutrality" in 2060, the carbon peaking target of the iron and steel industry is initially set as: before 2025, carbon emissions will peak; by 2030, carbon emissions will be higher than the peak A 30% reduction, and an estimated carbon emission reduction of 420 million tons. The "Guiding Opinions on Promoting the High-quality Development of the Iron and Steel Industry" jointly issued by the Ministry of Industry and Information Technology, the National Development and Reform Commission, and the Ministry of Ecology and Environment proposed that the implementation plan for carbon peaking in the iron and steel industry should be implemented, and the coordinated governance of pollution reduction and carbon reduction should be promoted.

At present, more and more iron and steel enterprises have released roadmaps for carbon peaking and carbon neutrality to promote the green transformation and development of the iron and steel industry. Green manufacturing in the steel industry is achieved through digital iterative upgrading, investment in new process equipment and technological transformation, extreme management of energy efficiency, coupled with precise marketing and delivery of green products, green and low-carbon procurement and logistics, carbon footprint management and other supply chain services and services. The synergy will continue to promote the deep integration of industrial innovation technology and the green steel manufacturing process, and provide green and smart manufacturing solutions covering the entire life cycle.