关键词: 炼铁, 节能, 减排, 新技术, 碳素流, 能量流

Abstract: Through the basic research on current situation of iron-making industry in China, the importance of iron-making industry in sustainable development was demonstrated, and the severe problems of energy consumption and environment protection were pointed out. And the key problems on energy saving and emission reduction in steel plants were analyzed based on carbon and energy flows, from which it was clear that the main task of emission reduction was to reduce the consumption of fossil fuels, such as coal and coke, and the main task of energy saving was to take advantage of the latent and sensible heat of top gas and sensible heat of blast furnace slag. Then, several advanced energy saving technologies, such as coke oven gas injection, injection of plastic scraps into the blast furnace, pure oxygen blowing and utilization of blast furnace slag, were analyzed. They did not make fundamental change to the blast furnace ironmaking process. Their popularity was critical to the improvement of energy saving and emission reduction in iron and steel industry in China. Finally, the research prospect of energy saving and emission reduction was indicated. In the short term, the utilization efficiency of fossil fuels should be improved based on in-depth research on consumption mechanism, and the structure of energy consumption optimized to alternate fossil fuel with clean energy. In the long term, the nature of iron making, carbon deoxidization, should be thought deeply in order to conduct exploratory research on innovation of ironmaking process and eliminate the fundamental shortcoming of current ironmaking process with high energy consumption and high emission.

Key words: iron-making, energy-saving, emission reduction, new technology, carbon flow, energy flow