高炉生产综合诊控模型研发及应用

 钢铁工业是国民支柱产业,炼铁高炉能耗和成本的高低,在很大程度上决定了一个钢铁联合企业在区域市场的竞争力。从现实条件出发,依靠装备技术进步和信息化手段,通过加强对高炉生产数据的在线跟踪、综合分析及研究,不断优化高炉冶炼标准化、精准化操作模式,合理地处理好具体技术装备、原燃料和高炉4大操作制度的关系,处理好不断上升的煤气流和不断下降的炉料的相关传质、传热关系,为生产管理、技术人员、操作人员寻求合理的高炉操作制度提供依据,成为实现高炉冶炼过程定量化、高效化的一条根本途径。基于炼铁基础理论,通过计算机信息化手段,研发了具有对高炉冶炼过程中煤气流在线诊断、量化评价、优化等功能的生产综合诊控模型并得到应用。通过对高炉冶炼过程中煤气流分布指数、布料矩阵、综合冶炼参数进行适时计算、跟踪及潜力分析,对渣铁成分和指标进行预测预控,得到在具体原燃料条件下高炉进一步挖掘潜力时对布料、送风及渣铁制度等与指标控制相关联复杂相互影响关系数据的量化处理。进而得出满足具体冶炼条件下改善技术指标的冶炼控制措施,并利用物料平衡、热平衡模型对冶炼因素调整进行效果检测。应用结果表明,系列模型的应用有利于形成在具体条件下新的更为匹配的煤气流分布,综合冶炼参数更为和谐,在客观条件改善较小的情况下,喷吹煤粉相对置换比大于1.0,实现了低w(Si)、稳w(Si)冶炼,获得了较高的高炉热量利用率。同比上一年入炉品位条件,实现利用系数、燃料比等指标显著改善。

Development and application of comprehensive diagnostic control model for blast furnace production

Iron and steel industry is a national pillar industry. The energy consumption and cost of blast furnace determine the competitiveness of an iron and steel in regional market to a great extent. Based on the actual conditions, relying on equipment technology progress and information means, through strengthening the online tracking, comprehensive analysis and research of the production data of the blast furnace, the standardization and precision operation mode of blast furnace smelting were optimized continuously.The Production of blast furnace reasonably deal with the relationship between specific technology and equipment, raw fuel and the four operating systems of the blast furnace. The production of blast furnace deal with the relationship of mass and heat transfer between rising gas flow and falling charge.It provides a basis for production management, technicians and operators to seek reasonable blast furnace operation system. This becomes a fundamental way to realize quantification and high efficiency of blast furnace smelting process. Based on the basic theory of ironmaking, a comprehensive diagnostic control model with on-line diagnosis have been developed. Quantitative evaluation and optimization of BF's gas in blast furnace smelting process was developed and applied by means of computer information. In the process of blast furnace smelting, through timely calculation, tracking and potential analysis of BF's gas distribution index, distribution matrix and comprehensive smelting parameters, The model predict and control the composition and index of slag iron. The quantitative processing of complex data related to distribution of raw materials, air supply, slag and iron system and index control is obtained when further tapping the potential of blast furnace under specific raw fuel conditions. Furthermore, the smelting control measures to improve the technical indexes under specific smelting conditions were obtained. The model can test the effect of smelting factor adjustment by using the material balance heat balance model. Application practice shows that the application of series of models is conducive to the formation of new and more matched BF's gas distribution under specific conditions, and the comprehensive smelting parameters are more harmonious. Under the condition of little improvement in objective conditions, the relative replacement ratio of pulverized coal injected is more than 1.0; low w(Si) stable w (Si) smelting is realized. The Production of blast furnace obtain the higher utilization rate of blast furnace heat. The utilization coefficient, fuel ratio and other indicators have been significantly improved year-on-year.