DETERMINATION OF THE EQUIVALENT THERMAL-CONDUCTIVITY OF DENSELY ROLLED SHEET STEEL

An analog model (using an EI-12 electronic integrator as an example) a nd a procedure for determining the equivalent thermal conductivity coe fficient of dense rolls of sheet steel in the radial direction when th ermaling in a bell-type electric furnace with forced circulation of a protective atmosphere are described. First, fictitious values of therm al conductivity coefficients are determined under the condition of uni form distribution of the protective gas over the convection rings of i ndividual rolls, and then the actual values are determined after redis tribution of the volumes of the protective gas circulating in the conv ection rings proportionally to the change in the values of the fictiti ous thermal conductivity coefficients.