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.

KEYWORDS:

• Vanadium–titanium magnetite
• composite agglomeration process
• sintering
• reduction disintegration
• melting and dripping property
• pelletized feed proportion
• pelletized feed size
• pelletized feed basicity

Acknowledgements

This work is financially supported by the National Natural Science Foundation of China (Grant Number: 51904023, 51804027) and Fundamental Research Funds for the Central Universities (Grant Number: FRF-IC-19-004).

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by Fundamental Research Funds for the Central Universities: [Grant Number FRF-IC-19-004]; National Natural Science Foundation of China: [Grant Number 51904023]; National Natural Science Foundation of China: [Grant Number 51804027].