Abstract: Basing on raw materials conditions of typical iron and steel plant， the sintering experiments were carried out for the Indonesia vanadium titanium magnetite under different basicity and the effect of binary basicity (R=m(CaO)/m(SiO₂)) on the sintering process and sinter′s quality were investigated in this work. The results showed that when the basicity (R) increased from 1.4 to 2.3， the coefficient of sintering effectiveness decreased from 1.63t/(m²·h) to 1.44t/(m²·h) and the rate of finished products after sintering decreased from 78.5% to 75.3%. Meanwhile， with the increasing of basicity， the vertical sintering speed increased gradually and the w(FeO) decreased constantly. Moreover， with the increasing of basicity from 1.4 to the 2.3， the drum index firstly dropped to the lowest value at the basicity of 1.7 and then rose gradually. With the increase of basicity， both the reduction degradation index (RDI) and reducibility index (RI) could be improved， which help to develop the gas permeability at the top of the furnace and the indirect reduction ability.

Key words: basicity, Indonesia vanadium titanium magnetite, sintering process, RDI, RI