Application on one-key alloy feeding optimization system for steelmaking process of 90 t EAF
LI Bo1, YANG Ling-zhi1, SONG Jing-ling2, GUO Yu-feng1, LI Zhi-hui1
1. School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, Hunan, China; 2. Steelmaking Branch, Hengyang Valin Steel Tube Co., Ltd., Hengyang 421000, Hunan, China
摘要 电弧炉炼钢流程是钢铁行业转型的重要工艺路径。随着对特殊钢成分要求的不断提高,对钢铁企业电弧炉炼钢的成分控制提出了更高的要求。合金加料是电弧炉炼钢流程中调控成分的重要手段之一。由于冶炼不同钢种所需配入合金种类以及质量不同,各合金价价格不平均,合金成本一直是电弧炉炼钢冶炼生产成本的重要组成部分。当前,衡阳华菱钢管有限公司大管坯炼钢厂90 t电弧炉炼钢流程合金加料操作过程凭借现场技术人员经验,没有充分考虑不同钢种合金元素收得率差异、不同批次合金原料价格与成分的波动,造成窄成分控制差、合金加料次数多、合金成本高。针对这一问题,基于合金元素收得率动态库与2阶段单纯形算法对合金加料工艺的各影响因素进行分析,采用SQL数据库、Visual Studio 2013开发平台与OPC接口技术,研发了一键操作的合金加料优化系统,将系统计算结果传输至PLC,实现一键合金加料操作。系统运行结果表明,优化得出了不同钢种的合金元素收得率;电弧炉出钢后钢包合金配入比例与电弧炉炼钢流程合金配入比例相比,由73.88%左右提高到85.11%;电弧炉出钢后钢包内合金加料经系统计算成本降低了6.32%～8.07%,精炼炉合金加料经系统计算成本降低了1.04%～22.59%。电弧炉炼钢流程总成本降低了1.53%～10.02%。
Abstract：EAF steelmaking process is the important process on steel industry transformation path, as the standard of special steel components increasing, the higher requirement of composition control for EAF steelmaking in iron and steel enterprises has put forward, and alloy feeding EAF steelmaking process is one of the important means for regulating composition. Because of alloy type and quality needed in different steel grades during smelting are different and the price of alloy is not average, therefore, alloy cost is always been an important part of the production cost of EAF steelmaking. At present, the alloy feeding operation process of 90 t EAF steelmaking process in Hengyang Hualing Steel Tube Co., Ltd., relies on the experienced technical staff, and does not fully consider the difference of alloy element yield for different steels. The fluctuation of price and composition of alloy raw materials in different batches results in less control of narrow composition, more frequency of alloy feeding and high alloy cost. In order to solve this problem,based on the dynamic database of alloy element yield rate and the two-stage simplex algorithm, the influencing factors of alloy feeding process were analyzed in the article. Using SQL database, Visual Studio 2013 development platform and OPC interface technology, the alloy feeding optimization system with one-key operation was developed. The calculation results of the system were transmitted to PLC to realize the one-key alloy feeding operation. The system operation results show that the alloy element yield rates of different steels are optimized. The alloy allocation ratio in the ladle after EAF tapping increased from about 73.88% to 85.11%, compared with the whole steelmaking process. The system calculation cost of alloy feeding in ladle after EAF tapping reduced 6.32%-8.07% and the system calculation cost of alloy feeding in LF reduced 1.04%-22.59%. The total cost of EAF steelmaking process decreased by 1.53%-10.02%.
李勃, 杨凌志, 宋景凌, 郭宇峰, 李志慧. 90 t电弧炉炼钢流程一键合金加料优化系统应用[J]. 钢铁, 2022, 57(4): 58-67.
LI Bo, YANG Ling-zhi, SONG Jing-ling, GUO Yu-feng, LI Zhi-hui. Application on one-key alloy feeding optimization system for steelmaking process of 90 t EAF[J]. Iron and Steel, 2022, 57(4): 58-67.
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