Monitoring System of Firebrick Lining Erosion of Blast Furnace Hearth

Abstract

It is possible to increase the efficiency of the computer-based system of diagnostics of the elements state of the firebrick lining by means of use in their structure of the module, in real time revealing the structural changes of non-stationary controlled signals. These changes as a rule testify the occurred deviations in the technical condition of the controlled object. The received information about the revealed structural features in analyzed signals it is expedient to use for forecasting of further dynamics of controlled parameters. The mathematical description and the computer program “Hearth Erosion” of calculation the two-dimensional temperature fields in any vertical and horizontal section of the blast furnace hearth are developed. Calculation is carry out the decision of the equations of heat conductivity with use of indications of the big number of sensing transducers of temperature (to 1000), built in the furnaces firebrick lining between the firebrick blocks. The continuous control of the temperature change in each point allows to define the remained thickness the firebrick lining and to warn, in case of need, the furnace personnel about the beginning of the firebrick lining erosion. The continuous control of change of temperature in the firebrick lining is made on the basis of mathematical model. The system of collecting, processing and transfer information from sensing transducers of temperature or thermal streams in a program database “Hearth Erosion” is used. Programs are installed on blast furnaces of Chinese National Republic: Jinan, Jiyuan and Liuzhou Iron and Steel Works together with Russian-Chinese company SKKONT.