Experimental and simulation on the granulation process of blast furnace slag
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摘要: 重点介绍了干式粒化工艺中的离心粒化工艺和气淬粒化工艺，由于高炉熔渣的粒化破碎是高温瞬态过程，只通过试验的手段难以监测，因此从试验和数值仿真两方面研究了干式粒化工艺的发展和应用现状。通过对两种工艺的总结和比较，认为气淬粒化工艺具有粒化效果好、处理渣量大等优点，从行业发展和工业化应用的角度来看，是未来匹配大型高炉生产过程最具发展前景的干式粒化工艺。Abstract: Emphasis was placed on the centrifugal granulation process and gas quenching granulation process during the dry granulation process. Due to the high-temperature transient process of granulation and crushing of blast furnace slag, it is difficult to monitor its specific change process solely through experimental means. Therefore, the development and application status of dry granulation process are studied from both experimental and numerical simulation perspectives. Through the summary and comparison of the two processes, the gas quenching granulation process has the advantages in good granulation effect and large slag handling capacity. From the perspective of industry development and industrial application, the gas quenching granulation process is the most promising dry granulation process in the future to match large blast furnace production processes.
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图 5 新日铁的高炉熔渣风淬处理工艺[41]
Figure 5. Blast furnace slag treated by air quenching process of Nippon Steel
图 6 高炉熔渣气淬成珠过程示意[43]
Figure 6. Process diagram of the molten blast furnace slag quenching into beads
图 7 高炉渣粒化仓物理模型[53]
Figure 7. Physical model of the blast furnace slag granulation silo
图 8 单颗粒、多颗粒以及旋转颗粒的物理模型[54]
Figure 8. Physical models of single particle, multi particle, and rotating particles
图 11 无气淬风和有气淬风的渣粒稳态粒化结果[63]
Figure 11. Results about centrifugal granulation of the liquid slag with and without wind blasting
图 13 单颗粒熔渣换热三维模型[66]
Figure 13. A three-dimensional model of the single particle slag heat transfer
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