Development path and key technical problems of low carbon ironmaking in China
GAO Jian-jun1,2, QI Yuan-hong1,2, YAN Ding-liu1,2, WANG Feng1,2, XU Hai-chuan1,2
1. State Key Laboratory for Advanced Iron and Steel Processes and Products, Central Iron and Steel Research Institute, Beijing 100081, China; 2. Research and Development Department, CISRI Sunward Technology Co., Ltd., Beijing 100081, China
Abstract:"Carbon peak" and "carbon neutrality" are overall plans for the future development of China's iron and steel industry. Reducing carbon emission is a technical problem that steel enterprises need to overcome together. Development path of low carbon ironmaking technology in China is analyzed from three aspects of source, process and terminal CO2 emission reduction. The key technical problems needed to be solved to realize "carbon neutrality" are put forward. The analysis shows that EAF steelmaking is the main way to realize "carbon neutrality", and hydrogen shaft furnace direct reduction will be an important supplement to realize "carbon neutrality" in China's iron and steel industry. The technologies for blast furnace injection of hydrogen rich gas, oxygen blast furnace and full oxygen smelting reduction iron smelting can reduce carbon dioxide emission. However, the reduction of carbon dioxide emission is limited. Only by combining with CO2 adsorption, storage and utilization, can "carbon neutrality" be realized. In order to realize "carbon neutrality" in iron and steel industry on schedule, the key technical problems to be solved include low-cost hydrogen preparation technology, high-temperature gas heating technology, low-cost CO2 removal technology from furnace top gas and CO2 storage and utilization technology.
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