MATHEMATICAL-MODEL FOR TALL COKE-OVEN BATTERY .3. INTEGRATED MODEL AND ITS APPLICATION

This paper is the last of three describing the development of an integrated model for the tall coke oven battery. The integrated model consists of numerous submodels which simulate the various processes occurring within both the ovens and the combustion flues. These various submodels are briefly reviewed and the methodology is described by which they are assembled into two coherent models, one for the oven side processes (i.e. heat transfer, evaporation and condensation of free moisture, release of non-condensable gases, gas flow, and structural changes that lead to the formation of coke) and the other for the flue side processes (i.e. flow, combustion, and heat transfer to the heating walls). The complex interaction of the various submodels, as well as that which occurs between the oven side and the flue side models, is described. Results are presented first for the oven side model operating under an imposed condition of uniform heating from the flue and the effect of several key parameters on overall coking time is assessed. The integrated model employing the coke side and oven side models operating in unison has been applied to both Stelco Lake Erie Works and Algoma no. 9 batteries. Results from these simulations are presented showing the model to be in good agreement with data obtained by Stelco and Algoma personnel.