Optimum Control of the Thermal Regime of Blast Furnace with Incomplete Information of the Process and Limited Resources

This paper is a continuation of the previous report at the IV-th IFAC congress. The authors describe here the results of the latest investigations concerning designing and partial testing an original system of checking and optimum controlling of the thermal condition of modern blast furnaces. The problem of static optimization and dynamic stabilization of the thermal condition of the blast furnace melting is solved by subdividing it into two sub-problems, one concerning the upper thermal zone of the furnace and the second - the lower one. Specified and proved algorithm of automatic processing and analysing multidimensional current information concerning the operation of the furnace is given in the paper. This enables to estimate the intensification of the main blast furnace processes and to calculate independent generalized thermal condition parameters of the upper and lower zones of the furnace. The expediency of using such generalized parameters for checking and controlling blast furnace processes is proved by the results of statistical investigations. The methods of calculating optimum value of generalized parameters of the thermal condition of the upper section of the furnace worked out by the authors of the paper a static model of thermal regime of the blast furnace process and the algorithm of selecting optimum complex of quick-response action controls are also described here. This algorithm is based on applying new ideas of controlling blast blast furnace thermal condition and its realization is associated with using modern computers.