Smelting Vanadium–Titanium Magnetite by COREX Process: Effect of V–Ti Bearing Pellet Ratio on the Softening and Melting Behavior of Mixed Burden

Effect of Top Gas Recycling Technology on the Softening, Melting and Dropping Behavior of V–Ti Bearing Burden in COREX Process

“…Detailed information about the experimental setup can be found in the references. 6) Before the SMD experiment, 80 g of coke was first weighed and placed at the bottom of the crucible. Then, according to the factory's formula, weighed 250 g of sinter, 86.25 g of pellet, 150 g of VTP, and 23.75 g of lump ore, and mixed them evenly.…”

“…2. 6) The temperatures of start softening (T 10 ) and end softening (T 40 ) were used to evaluate the softening and shrinkage properties of the burden bed. Melting temperature (T S ) represented the beginning of burden melting into liquid slag and iron, and the gas flow was blocked at this time.…”

“…2 that the pressure drop curve rises again caused by slag foaming, and the corresponding temperature was defined as T f . 6) The pressure drop from T S to T f was named stage Ⅰ, and from T f to 1 600°C was named stage Ⅱ. The peak values of pressure drop (P P1 and P P2 ) and gas permeability indexes (S D1 and S D2 ) were used to characterize the resistance of reducing gas across the burden bed.…”

“…[2][3][4][5] Our previous research has proposed and confirmed that COREX process has a huge advantage in smelting V-Ti bearing burden due to the pure oxygen (without N 2 ) blown into the tuyere. 6) However, COREX also has some problems of insufficient gas flow, excessively high tuyere temperature and high fuel ratio compared with blast furnace, which affects its operation and commercial application. 7) In order to solve the above problems, the top gas recycling (TGR) technology used in oxygen blast furnace (OBF) is tried to be applied in the COREX process.…”

Evolution of Viscosity and Structure Property during Aluminothermic Reduction of Vanadium‐Enriched Slag

“…The emission of CO can likely cause the foaming slag, thus hampering the coalescence between fine droplets and resulting in difficulty in the separation of slag‐metal. [ 13,14 ] Moreover, the unavoidable disadvantages of vanadium carbide (VC) generation and the porous structure of the FeV alloy product in the carbothermal reduction process have made this process less favorable in the industry than the silicothermic or aluminothermic reduction processes for FeV production. Although the silicothermic reduction reaction is exothermic, an external heat source is required to reduce V‐bearing oxides fully, which typically involves smelting in an electric furnace to produce a lower grade FeV alloy.…”