Abstract
The thermal reactions of mechanically activated coal and natural wolframite mixtures have been studied using DTA–TG. The reaction mixture, prepared on the basis of a thermodynamic simulation, was milled in a planetary ball mill for either 2 or 4 h. Unmilled and milled mixtures were subjected to differential thermal analysis under nitrogen and argon atmospheres with the crystalline phase composition determined with XRD. The main differences between nitrogen and argon atmospheres were observed in the raw samples. Milled samples produced primarily an iron tungsten phase, Fe7W6. Under the nitrogen atmosphere, both samples showed a greater extent of reduction than under argon.
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