高炉-转炉钢铁制造流程低碳技术发展与认识

Development and understanding on low carbon technology based on BF-BOF steel manufacturing processes

在全球“碳达峰”“碳中和”发展形势下,研究高炉-转炉流程低碳技术发展战略、目标和路径,大幅度降低CO_(2)排放对钢铁工业实现可持续发展具有重要意义。面向未来,钢铁仍是重要的基础材料、结构材料和功能材料,钢铁工业仍是经济社会发展的重要基础产业。研究分析了日本钢铁工业发展现状及其特征,介绍了高炉-转炉流程减碳关键技术研究及其进展。针对日本钢铁工业减碳技术开发研究,论述了高炉矿焦混装技术、高比率球团矿冶炼技术对于常规高炉降低燃料比的机理和应用效果。讨论了含碳团矿和预还原烧结矿的制备工艺流程,分析了新型炉料制备的关键技术难点,论述了新型炉料在高炉冶炼过程的减碳机理。介绍了SCOPE 21新型炼焦工艺的构成、技术特点和应用效果;针对铁焦制备的工艺过程、冶金机理和使用效果进行了评述。重点论述了新一代高炉炼铁工艺COURSE 50的工艺组成、技术路线和流程特征,阐述了核心技术难点和关键技术构成以及工程应用前景。分析了构建智能化高炉信息物理系统对高炉减碳的支撑作用,指出了高炉智能化与低碳化协同发展的重要性。结合日本高炉-转炉流程减碳技术发展现状及未来方向,提出了制定可行的减碳技术战略、选择经济适用的技术路线、确定关键技术研究的认识与思考。指出了中国钢铁工业实现绿色低碳高质量发展的思路和途径。

Under the global "carbon peak" "carbon neutralization" development situation, it is of great significance to research the low carbon development strategy, goals and approach of blast furnace-converter(BF-BOF) process and greatly reduce CO_(2) emission to achieve sustainable development of steel industry. Facing the future, iron and steel is still an important basic material, structural material and functional material, and the iron and steel industry is still an important basic industry for economic and social development. The development status and characteristics of Japanese steel industry are studied and analyzed, and the key technologies of blast furnace-converter process are introduced. For the research and development of carbon reducing technologies in Japanese steel industry, the mechanism and application effect of coke and ore mixed charging technology and high ratio pellet smelting technology of blast furnace in reducing the fuel ratio are discussed. The preparation technical process of reactive coke agglomerate and the pre-reductive sinter ore are discussed. The key technical difficulties of new raw materials and burden preparation are analyzed, and the mechanism of carbon reducing for new raw materials in blast furnace smelting process is discussed. The composition, technical characteristics and application effect of SCOPE 21 process are introduced, and the technical process, metallurgical mechanism and application effect of composite iron coke preparation are reviewed. The process composition, technical route and process characteristics for the new generation of blast furnace ironmaking process COURSE 50 are mainly discussed, and the core technical difficulties, key technology composition and engineering application prospect are expounded. The supporting role of constructing intelligent blast furnace cyber physics system for carbon reducing of blast furnace is analyzed, and the importance of coordinated development for intelligent and low carbonization is pointed out. Based on the development status and future of carbon reducing technology in Japan, the understanding and thinking of formulating feasible carbon reducing technology strategy, selecting economical and applicable technical routes and determining key technology research are proposed. It points out the philosophies and ways to realize the green, low carbon and high quality development in the China′s iron and steel industry.