Efficient double-layer sintering of titanomagnetite concentrate.

Area of Science:

• Metallurgical Engineering
• Materials Science

Background:

• Traditional titanomagnetite sintering is energy-intensive and yields low-strength sinter.
• Existing methods face challenges in improving sinter quality and reducing operational costs.

Purpose of the Study:

• To investigate the efficacy of double-layer sintering for titanomagnetite.
• To enhance sinter quality, productivity, and reduce fuel consumption.

Main Methods:

• Implemented a double-layer sintering process with distinct basicities for the lower (2.5) and upper (1.5) feed bed layers.
• Conducted theoretical analysis and sintering pot tests.
• Evaluated sinter yield, productivity, and reduction disintegration index (RDI+3.15).

Main Results:

• Achieved a sinter yield of 67.32%, productivity of 1.65 t m⁻² h⁻¹, and RDI+3.15 of 49.68%.
• Demonstrated significant improvements of 33.12% in yield, 1.74% in productivity, and 9.27% in RDI+3.15 compared to traditional methods.
• Reduced solid fuel consumption by 1.69 kg t⁻¹ and saved approximately 10% on electricity and gas.

Conclusions:

• Double-layer sintering with controlled basicities optimizes mineralization and permeability.
• This technique promotes the formation of silica-ferrite of calcium and aluminum (SFCA) while reducing perovskite, leading to superior sinter quality.
• The study confirms double-layer sintering as a viable, efficient alternative for titanomagnetite processing.