Ferrochromium ratio calculation formula

Amount of chromium atom: 52 iron atomic weight: 56

u Cr2O3 : M %
u Fe2O3 : N %
u Cr Ã—2 / CrÃ— 2 + O Ã—3 =0.6842 u Fe Ã—2 / FeÃ— 2 + OÃ— 3 =0.7
Cr / Fe = M Ã— 0.6842 / N Ã— 0.7
example:
Set a batch of ore containing 50% Cr2O3 , Containing 15% Fe2O3 , calculating ferrochrome ratio
M = 50% N = 15 %
Cr / Fe = M Ã— 0.6842 / N Ã— 0.7 = 50% Ã— 0.6842 / 15% Ã— 0.7 = 0.342 / 0.105 = 3.25
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