基于规划算法的出钢合金化模型

Steel Tapping Alloying Model Based on Planning Algorithm

针对转炉出钢合金化过程中合金成本高、合金化后成分控制不精确、精炼炉合金补加量大等问题,以中天钢铁集团有限公司第三炼钢厂转炉合金化工艺为研究对象,基于转炉历史冶炼数据进行物料平衡和热平衡计算,建立理论出钢量计算模型;分析历史合金加料数据及配料结构,整合合金化数据库,结合规划算法建立出钢合金化模型;基于实际生产数据,对比模型加料与人工加料不同模式下的合金化命中率及综合经济效益指标,修正合金化模型,优化合金配料结构;以20CrMnTiCQ钢为试验钢种进行工业试验,验证本文模型的应用效果。结果表明:相比人工加料,本文模型的合金加入量更少,合金化成分命中率为100%,且成分控制的精确性及稳定性更高,精炼炉补加合金压力更小,平均合金补加量降低9.3%,吨钢平均降本20.1元。

To address issues such as high alloy costs,imprecise post-alloying component control,and excessive alloy additions in refining furnace during the alloying process of ladle metallurgy,the converter alloying process at the third steelmaking plant of Zenith Iron and Steel Group Co.,Ltd was taken as the research subject.Based on historical smelting data from the converter,material balance and thermal balance calculations were conducted to establish a theoretical tapping volume calculation model.Historical alloy feeding data and batching compositions were analyzed to integrate into an alloying database.Combined with planning algorithms,a steel tapping alloying model was established.Based on actual production data,the alloying hit rates and comprehensive economic benefit indicators under different modes of model-based feeding versus manual feeding were compared and analyzed,and the alloying model was revised to optimize the alloy batching structure.Finally,industrial trials were conducted using 20CrMnTiCQ steel to verify the application effect of the model proposed in this paper.The results show that compared with manual feeding,the amount of alloy added using the model presented in this paper is less,the hit rate of alloying composition is 100%,and the accuracy and stability of composition control are higher.The pressure of adding alloy to the refining furnace is smaller,the average alloy addition amount is reduced by 9.3%,and the average cost per ton of steel is reduced by 20.1 yuan.