Experimental investigations and mathematical modeling of the dynamics of thermal decomposition of carbon composites

The thermolysis of carbon compositions of leading enterprises of the electrode branch of industry is experimentally investigated by methods of differential thermal and gravimetric analysis in a temperature range of 200-900°C using a Setsys Evolution 1750 derivatograph. The samples of "green" billets differed in the granulometric composition of carbon of the filling agent and the type of the binding agent (pitch). They were heated at a rate of 15 K/min in the inert medium. The data on the isolation of volatiles were processed by mathematical modeling in the Mathcad-11 medium by one- and two-component diagrams of computation of the kinetics of the thermolysis process. Mathematical models adequately describing these experimental data were constructed. The constants or the reaction rate and activation energies of decomposition of the binder of carbon composites for both diagrams of the computations were established. An example of the computation of thermolysis for industrial conditions of roasting the graphitized electrode of the EG Ø200 mm grade is presented