Split-thickness Layer of Vanadium-titanium Magnetite Ore Sintering Process

Base on the characteristics of Cheng Steel vanadium titanium ore and actual production conditions,the shunt granulating sintering process under different material layer thickness conditions （conventional sintering,acid mixed sintered） had been investigated. Compared with conventional sinter （600mm）,when the material layer thickness is 1 000 mm,acid mixed sintering improves the sinter quality,especially RDI index. The resulting sinter by shunt granulating thicker layer of vanadium titanium ore features the typical structures of both high basicity sinter and acid pellets. On the other hand,the acid mixed sinter has a decreasing content of hematite,most of which independently existing in acidic ball.For the high basicity sinter existing in the resulting sinter microstructure,it has a higher content of magnetite and remarkable amount of binder phase acid calcium,while perovskite content decreases.