Closed Blast Furnace Conditions Intelligent Optimization Of The Operation Guidance System

The Lead-Zinc Imperial Smelting Process is a complex mechanism, with the characteristics of strong nonlinear, strong coupling, uncertain, time varying and time-delay, multi-constrained, multi-input and multi-output. The estimation strategy and operation guide technique of ISF state are mainly involved in this thesis, so as to establish the intelligent optimization operation guide system of ISF state.The furnace state is a synthetical value, which reflects the ongoing degree of smelting process in the Lead-Zinc Imperial Smelting Process. An intelligent estimation strategy of furnace state proposed in the paper can estimate the normal state or the abnormal state of ISF state through using compositive method of mathematics model & knowledge method, and fuzzy control & expert system. The compositive permeability and slag index are the main reference to estimate the furnace state. If the real-time state is good, then the operation values remain; otherwise, the synthetical values, such as pressure and flux of hot fan, gradient material distribution, furnace air (square trunk), velocity of material feeding, become the major factors to estimate which kind of equipments faults or craftwork faults are arisen.The intelligent optimization operation guide strategy of furnace state is proposed on the base of estimation method of furnace state. The compositive model of grey theory model and neural network model is built to predict the permeability. The clustering searching and expert system are used to realize the state optimization operation in normal mode. In fault mode, the expert system, basing on produce-mode rules, adopts bi-directional ratiocination to realize estimation and disposal of faults (faults display, alert, faults reason display, expert operation guides).The application of the intelligent optimization operation guide system shows that it can restrain the fluctuation of permeability effectively, improve the output and quality of products largely, and reap the remarkable economic and social benefit.