Effect of Ca₃TiFe₂O₈ on Temperature of Liquid Phase Appeared in Sintering Process of Iron Ore Fines

The different minerals were mixed with titanium-containing calcium ferrite Ca₃TiFe₂O₈ to study the melting temperature and mineral composition in sintering process of titaniferous iron ore by DSC and XRD methods.Results showed that the melting temperature of samples was lower than that of the each individual mineral in the sintering process,i.e.that of the Ca₃TiFe₂O₈+CaFe₂O₄,the Ca₃TiFe₂O₈+Fe₂O₃,the Ca₃TiFe₂O₈+CFA and the Ca₃TiFe₂O₈+SFC were 1 213 ℃,1 215 ℃,1 204 ℃ and 1 205 ℃ respectively.In addition,it was found out that Ca₃TiFe₂O₈ existed simultaneous with CaFe₂O₄,but was decomposed when it existed together with Fe₂O₃,CFA,and SFC,so it was considered as a intermediate product.Nevertheless,the sintering conditions of titanium-containing iron ore could be properly controlled to obtain the Ca₃TiFe₂O₈ that was conductive to the liquid phase formation for improving the diffusion condition during sintering process of iron ore fines.