基于在线动态废钢收得率的转炉能量模型研究与实践  

Research and practice of converter energy model based on on-line dynamic scrap yield

作　　者：甘俊杰 张立强 龙海山 夏金魁 张本亮 张超杰[1] GAN Junjie;ZHANG Liqiang;LONG Haishan;XIA Jinkui;ZHANG Benliang;ZHANG Chaojie(School of Metallurgical Engineering,Anhui University of Technology,Ma′anshan 243032,Anhui,China;Technology Development Center of Yangchun New Iron and Steel Co.,Ltd.,Yangjiang 529629,Guangdong,China;Steelmaking Plant of Baowu Group Echeng Iron and Steel Co.,Ltd.,Ezhou 436000,Hubei,China;Steelmaking Plant of Ningbo Iron and Steel Co.,Ltd.,Ningbo 315000,Zhejiang,China)

机构地区：[1]安徽工业大学冶金工程学院,安徽马鞍山243032 [2]阳春新钢铁有限责任公司科技开发中心,广东阳江529629 [3]宝武集团鄂城钢铁有限公司炼钢厂,湖北鄂州436000 [4]宁波钢铁有限公司炼钢厂,浙江宁波315000

出　　处：《钢铁研究学报》2023年第12期1483-1495,共13页Journal of Iron and Steel Research

基　　金：国家自然科学基金青年科学基金资助项目(52104317);国家自然科学基金面上资助项目(51874001)。

摘　　要：针对转炉炼钢过程中铁水比降低导致炉内热源不足,需要加入发热剂用于平衡炉内热量收支的问题,为更精确地控制转炉内配加发热剂用量,利用物料平衡和热量平衡作为理论依据,构建了转炉能量模型,并提出一种基于动态循环寻优的废钢收得率自适应算法,同时采用历史炉次的终点命中情况作为动态反馈,以提高转炉能量模型的鲁棒性能和计算精度。本模型在某厂120 t转炉的实际应用结果表明,在低铁耗下通过补加发热剂能够达到平衡转炉内热量收支的目的,平均每炉补加353.75 kg焦丁和54.25 kg硅铁,实现转炉平均废钢比由19.9%提升至22.0%。利用转炉能量模型控制发热剂加入量,能够在入炉原料成分、温度发生变化时,及时更新炉内热量收支平衡,从而合理化发热剂用量,提高废钢比,保证经济性和冶炼过程的稳定性,具有广泛的工业应用价值。To address the issue of insufficient heat source in the converter due to a decrease in the ratio of molten iron during steelmaking,a heating agent needs to be added to balance the heat balance in the furnace.In order to more accurately control the amount of heating agent added in the converter,a converter energy model was constructed based on material balance and heat balance,and an adaptive algorithm for scrap recovery rate based on dynamic cycle optimization was proposed.Simultaneously,the endpoint hit situation of historical heats was used as dynamic feedback to improve the robustness and computational accuracy of the converter energy model.The practical application results of this model in a 120 ton converter of a plant show that the balance of heat balance in the converter can be achieved by adding heating agents under low iron consumption.On average,353.75kg of coke and 54.25kg of silicon iron are added to each furnace,achieving an increase in the average scrap ratio of the converter from 19.9%to 22.0%.By using the converter energy model to control the amount of heating agent added,it is possible to update the heat balance in the furnace in a timely manner when the composition and temperature of the incoming raw materials change,thereby rationalizing the amount of heating agent used,increasing the scrap ratio,ensuring economic efficiency and stability of the smelting process,and having broad industrial application value.

关 键 词：转炉炼钢 算法开发 废钢收得率 终点控制 数学模型 

分 类 号：TF721[冶金工程—钢铁冶金]