Investigating the effects of charge components on metallic chromium production via the aluminothermic route with no external energy

The possibility of producing metallic chromium Si-om Cr2O3 via rite alumino thermic route, with no external energy supply, was the subject of th is lab oratory-scale research. The experimental study focused on investigating the individual effects and quantitative optimization of the charge contents, i .e., the additions of CrO3, A I powder and CaO (or BaO). The highest chromi um recovery of 98% was attained with rile additions of 12% CrO3 and 1.2 tim es the stoichiometrically required amount of Al powder. nle optimum CaO add ition giving the highest chromium recovery was found when the CaO/Al weight ratio in the charge was equal to 0.3. When BaO was used, however, 95% CI e xtraction efficiency was obtained at a BnO/Al weight ratio of 0.15.