Fly ash is a by-product from burning of coal. Utilization fly by carbothermic reduction an effective way to recover aluminum, silicon, and iron enhance product-added value. This work focused on the phase transformation Al2O3, SiO2 Fe2O3 during in air. A comparative analysis air nitrogen was made. Thermodynamics performed illustrate possible reactions for residue condensate. X-ray diffraction (X...

We propose a simplified modeling approach for multi-phase reactor systems. The model can be used to determine system characteristics, explore parameter sensitivity and test control strategies. The model is based on the thermodynamic equilibrium assumption and invariant inventories to make it computationally inexpensive. We show that the control approach based on the overall inventories of the s...

J. Węgrzyn Silesian University of Technology, Faculty of Materials Engineering and Metallurgy, Katowice, Poland The effect of argon flow intensity on mass loss rate in the carbothermic reduction of SiO2 to SiC was examined. The graphite and natural quartzite in a molar ratio of C/SiO2=3 were used. Samples were reduced for 6 hours at 1 500 °C. In the range of argon flow intensity from 0,1 to 3,4...