关键词: 钢铁, 低碳, 直接还原铁, 氢源, 氢冶金

Abstract:

Since 2007, with the thinking, exploration and accumulation, it is believed that the decarburization transformation of China’s iron and steel industry is still following the current law of steel development in the world from the BF-BOF process to EAF and direct reduction iron (DRI) process. For the low-carbon transition in China, the “stuck neck” problem is that there is no hydrogen resource for DRI production because the world’s DRI production normally uses natural gas as the hydrogen source, while it is not available in China with the current situation (abundant of coal, lack of oil and gas) . According to the practice of the past 15 years, the hydrogen energy which could be regarded as the source to support the low-carbon transformation in hydrogen metallurgy of China’s steel industry were as followed. In the short term, various types of gas could be used as a viable hydrogen source for the production of DRI in China. In the medium term, electricity would replace dry gas in refineries and electrical olefin. In the long term, the source would be achieved by water-electrolytic hydrogen from photovoltaic and wind power. Based on the above-mentioned China’s hydrogen source roadmap, the development of low-carbon with green hydrogen metallurgical technology was a top priority. The integration of the government, leading enterprises and universities in the triple-helix cooperation demonstration would facilitate the role of China’s institutional strengths of focusing on major events, thereby overcoming the bottleneck of low-carbon production in China’s iron and steel industry.

Key words: steel, low carbon, direct reduction iron, hydrogen source, hydrogen metallurgy