Treatment of vanadium–titanium magnetite based on composite agglomeration process (CAP)

Abstract

Adopting conventional sintering process of vanadium-titanium magnetite concentrates has such problems as low tumbler index and RDI due to the high-TiO₂ content, coarse granularity and poor hydrophilicity. In this experiment, vanadium-titanium magnetite (VTM) is treated by the composite agglomeration process to prepare blast furnace burden and the resulting sinter performance is compared with conventional sintering process. Compared to the sinter with VTM proportion of 15wt%, the productivity and RDI+3.15 of the CAP product with the same VTM proportion are 0.45t/(m²·h) and 6.39% higher, respectively. The effects of pelletized feed proportion (PFP), pelletized feed size and pelletized feed basicity on agglomeration indexes of CAP are also studied. The results show that the optimal PFP, pelletized feed size and pelletized feed basicity are 15wt%, 5∼8mm and 0.9, respectively. Vanadium-titanium magnetite composite agglomeration process not only improves the quality and quantity indices of sinter, but also optimizes the melting and dripping properties.

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