90 t电弧炉炼钢流程一键合金加料优化系统应用

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...

Application on one-key alloy feeding optimization system for steelmaking process of 90 t EAF

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%.