Development and Application of a Diagnosis System for Dual Profiles of the BF Hearth
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 2500 m3 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.
blast furnacelining erosiondual profilesinverse problem of heat conductiondiagnosis system
万方数据
维普
