高炉炉缸双轮廓内型诊断系统的开发及应用

Development and Application of a Diagnosis System for Dual Profiles of the BF Hearth

基于可同步求解炉缸残衬和凝壳双轮廓的反问题模型,采用界面编制和软件封装技术,开发界面化在线高炉炉缸双轮廓内型诊断系统。将该诊断系统应用于某2500m²高炉,对其开炉后近7年的炉缸双轮廓内型演变行为开展研究,并结合焦比、煤比、鼓风动能等生产数据,对炉缸工作状态进行分析。结果表明,炉缸炭砖加陶瓷杯复合结构,在高热阻陶瓷杯经受约一年半的快速侵蚀后,逐渐进入“自保护”模式;当死料柱透液性不断恶化时,导致炉底凝壳过度结厚;而当焦比、鼓风动能提高及煤比降低时,可促进炉底结厚凝壳消熔,从而有效改善炉缸工作状态。

On the basis of an inverse-problem model that can be used to simultaneously obtain the profiles of both the residual lining and skull of the BF hearth,an interfaced and online diagnosis system is developed by means of interface programming and software packaging technology,which provides a convenient and scientific tool for BF researchers.The diagnosis system is then applied to an in-production 2500m BF to investigate the 7-year long evolution of the hearth dual profiles since the blow-in.Also,the hearth state is analyzed considering the actual production data including coke rate,coal rate as well as blast kinetic energy.The results show that the hearth with a composite structure of carbon bricks and ceramic cup gradually enters the self-protection mode after the high thermal-resistance ceramic cup is rapidly eroded for about 1.5 years.Increas-ing deterioration of the deadman permeability leads to excessively thickening of the skull in the hearth bottom.However,in-crease of the coke rate and blast kinetic energy,and decrease of the coal rate,enhance melting of the overly thickened skull,and effectively improve the hearth state thereby.