复合铁焦低碳炼铁炉料新技术基础研究

Steel industry is energy-intensive, and the key sector is blast furnace ironmaking for energy conservation and emission reduction. Steel enterprises eagerly need to develop innovative technology for realizing low carbon blast furnace ironmaking. Composite iron coke is the cutting-edge reserve technology for energy saving and emission mitigation put forth clearly in the 13th Five-year Plan of Steel Industry . Developing innovative technology of composite iron coke based on the domestic ironmaking raw materials has great significance for the low carbon and innovative development of Chinese ironmaking industry. A new process of iron ore and coal briquetting - carbonization in shaft furnace - application and optimization in blast furnace has been put forward. Some key scientific issues are emphatically studied, such as strength acquisition mechanism of composite iron coke under coupling effects with multi-parameter, collaborative optimization mechanism of multiple metallurgical characteristics, carbonization theory with inner heating, multiple interface gas-solid coupling reaction kinetics mechanism, feedback effects and energy conversion mechanism of ironmaking system with utilizing composite iron coke. Meanwhile, the key technologies including reasonable iron ore and coal blending, optimization the structure and metallurgical performance of composite iron coke, shaft furnace carbonization, optimization of blast furnace operation, and design of core equipment will be developed. The project will benefit to perfect the theory and technology system on low carbon ironmaking burden of composite iron coke, and lay solid theoretical and technical foundation for industrial application of composite iron coke, effectively promoting the progress and development of low-carbon blast furnace ironmaking technology in China.

钢铁工业是能源密集型产业，高炉炼铁是钢铁工业节能减排的关键，钢铁企业急需研发低碳高炉炼铁新技术。复合铁焦是钢铁工业“十三五”规划明确提出的前沿储备节能减排技术，研发适合我国炼铁原燃料条件的复合铁焦炉料新技术对我国炼铁产业低碳创新发展具有重要意义。本项目围绕复合铁焦新技术，提出矿煤压块-竖炉法炭化-高炉优化应用新工艺路线，重点研究多参数耦合作用下复合铁焦强度获得机制、冶金特性多指标协同优化机制、内热炭化理论、多界面气固耦合反应动力学机制、炼铁系统对使用复合铁焦的反馈效应及能量转换优化机制等关键科学问题，开发合理配煤配矿、复合铁焦结构和性能优化、竖炉炭化、高炉冶炼制度优化、核心装备设计等关键技术，完善复合铁焦低碳炼铁新炉料理论和技术体系，为复合铁焦新技术工业应用奠定坚实理论和技术基础，有效促进我国低碳高炉炼铁技术进步与发展。

建设低碳社会是全世界的共识。钢铁工业是能源密集型产业，高炉炼铁是钢铁工业节能减排的关键，钢铁企业急需研发低碳高炉炼铁新技术。复合铁焦是钢铁工业“十三五”规划明确提出的前沿储备节能减排技术，研发适合我国炼铁原燃料条件的复合铁焦炉料新技术对我国炼铁产业低碳创新发展具有重要意义。本项目围绕复合铁焦新技术，提出矿煤压块-竖炉法炭化-高炉优化应用新工艺路线，重点研究多参数耦合作用下复合铁焦强度获得机制、冶金特性多指标协同优化机制、内热炭化理论、多界面气固耦合反应动力学机制、炼铁系统对复合铁焦的反馈效应及能量转换优化机制等关键科学问题，开发合理配煤配矿、铁焦结构和性能优化、竖炉炭化、高炉冶炼制度优化、核心装备设计等关键技术，完善复合铁焦低碳炼铁新炉料理论和技术体系。本项目经过两年的研究，已发表论文40篇，其中SCI收录28篇；申请国家发明专利13项，已授权6项，培养研究生9人，其中博士生3人，硕士生6人，高级工程师3人，工程师2人。项目研究为复合铁焦的制备与高炉应用初步奠定了相关理论基础，有助于推进我国低碳高炉炼铁技术进步，促进炼铁产业创新发展。