Study on Catalytic Mechanism of Gas-based Reduction of Iron Ore

Influence of alkali salt on gas-based reduction of iron ore was studied.For the same cation,the sequences of the catalytic effect F^->Cl^->I^->Br^- and NO₃^->OH^->CO₃^2->SO₄^2->PO₄^3- are shown. The new catalytic mechanism was proposed.Upon this theory,the catalytic effect of catalyst is attributed to Fe -O chemical bond influenced by catalyst.The effect of catalysts differs from the kinds of cations and anions and stabilization of compounds,which can be formulated as Ψ=αf(M⁺)+βf(X^-)-γ(T)f(MX)。