A software to simulate the solidification, heat transfer and water flowrate distribution in slab continuous casting was developed by establishing a mathematical model for the heat transfer and solidification in medium thickness slab casting. This model was validated by pin shooting and surface temperature measurement experiments. A reasonable target surface control temperature was found by testing the high temperature mechanical properties of Nb bearing ship plate steel,and then the water flowrate of each loop of the secondary cooling zone was determined by the software. The influence of uneven secondary cooling in the slab width direction on the quality of the slab was also investigated, which provided data for the optimisation of the secondary cooling of the slab caster. On the basis of the above research, an optimisation scheme for a secondary cooling system was proposed. Experimental results showed that the quality of the slab was significantly improved after optimisation. The centreline macrosegregation was reduced, and the ratio of equiaxed grains was increased by 3?18%. In addition, the transverse cracking of the slab was almost eliminated.

论述了生产工艺发展、工艺流程结构变化及余热余能利用技术应用对钢厂能耗的影响，以及钢厂能耗分析与评价方法的研究进展. 指出基于物质流系统的能耗分析应注重主生产工序间物流状况及各工序的工艺改进，基于能量流系统的能耗分析更重视能量子系统间的能源供求匹配、能级匹配；钢铁产品生命周期分析将能耗研究范围扩展至钢铁生产过程的上、下游环节，有助于实现系统节能. 讨论了现有能耗评价基准(理论最小值、实际最小值、优化后最佳值、世界/区域最佳实践值)的优劣及其应用范围，并结合一般系统的可靠性，提出和探讨了钢厂能耗可靠性评价及其深入研究方向，以挖掘系统在原料条件、产品结构及维修制度、操作水平等方面的节能潜力，实现能耗的精细控制.

含铌钢铸坯出现角部横裂一直是困扰邯钢第三炼钢厂二号板坯连铸机生产的质量问题，本文重点研究了铸机矫直区现行喷嘴布置对板坯冷却效果的影响，并在喷嘴自动化测试平台上进行一系列喷嘴的组合实验，从喷嘴流量、喷射高度、水压三个方面探讨了相邻喷嘴喷淋水重叠度与水量在板坯宽度方向分布均匀性的关系。在此基础上，对现行的二冷喷淋系统提出了优化方案。实验结果表明，优化后铸坯角部横裂基本消除，铸坯中心偏析减轻至C类1.5，其等轴晶比率提高了4.1%，明显地改善了铸坯的内部质量。