【摘要】 提升连铸-热轧界面效率是实现钢铁工业绿色化转型的重要手段。本文介绍了武钢在冶金流程工程学理论指导下对板带产线连铸-热轧界面的应用。从流程学视角分析了前期存在的问题，包括含铌、钒、钛等微合金化钢热装轧制产生裂纹缺陷影响热装，铸轧不匹配造成库存高、无效交叉物流，余材多、处置慢造成库存周转慢等。研究了含铌、钒、钛等微合金化钢在不同高温条件下的铸坯组织和其断面收缩率，根据实际工艺参数进行拟合，找到了最佳热送入炉温度阈值范围，明确了传搁时间标准，避开了热装裂纹敏感温度区间，为热送热装轧制的质量提供了保障。通过铁钢轧全流程生产组织的“铁水分配、铸坯切断、热坯输送、热坯轧制”4量匹配来减少板坯无效交叉倒运，优化订单分配等原则避免产线同质化竞争，实施产线层流专线化生产提升瓶颈产线品种产能，产销研一体化从源头管控余材产生，开发板坯自动充当系统加快余材处置，利用“五部调度合一”提升板坯物流效率与库存预警处置效能。最终，实现全钢种热送率近100%，铸坯库存周转时间由3 d降低至1 d，余材自动充当率达80%，异钢种余材充当由人工处置的210 min降低至自动处置的小于10 min,1 200万t规模、18大类500多个钢种热装率达88.1%，平均装炉温度达656℃。更多还原

【Abstract】 Improving the efficiency of continuous casting-hot rolling interface is crucial for the green transformation of steel industry. Guided by the theory of metallurgical process engineering, Wuhan Iron and Steel carried out research on the continuous casting-hot rolling interface of plate and strip production lines, aiming to solve the existing problems such as hot charging cracking of microalloyed steels(containing Nb, V, Ti), high inventory and ineffective cross-logistics caused by casting-rolling mismatch, and low inventory turnover efficiency caused by excessive remnant materials and slow residual material disposal. Through investigating the slab microstructure and reduction of area under different high-temperature conditions of microalloyed steels, and fitting based on actural process parameters, the optimal hot charging temperature threshold and transfer-holding time standard were determined to avoid cracking-sensitive temperature ranges. Through the four-variable matching of hot metal distribution, slab cutting, hot slab transportation and hot slab rolling in the full-process production organization of ironmaking, steelmaking and rolling, ineffective cross-handling of slabs was reduced. Principles such as optimized order allocation were adopted to avoid homogeneous competition among production lines. Specialized production for key grades was implemented to boost the capacity of bottleneck lines. Integrated production, sales and research and development controlled residual material generation from the source. Automatic slab substitution system was developed to accelerate residual material disposal. The integration of five scheduling departments improved slab logistics efficiency and inventory early-warning and disposal efficiency. The results show that the hot delivery rate of almost all steel grades reaches nearly 100%, slab inventory turnover time is reduced from 3 d to 1 d, the automatic residual material substitution rate reaches 80%, the disposal time of different-grade residual materials has been reduced from 210 min manually to less than 10 min with automatic disposal, the hot charging rate of 12 million tons of products(18 categories, over 500 steel grades) reaches 88. 1%, and the average furnace charging temperature is 656 ℃.更多还原