Rooted in the Millennia-old Imperial Capital, Deep-exploring Strategic Molybdenum Resources

The order of adding various ferroalloys during steelmaking—once you see it, you’ll be amazed! (III)

Titanium burn-off is primarily governed by the slag; thus, when the slag volume in the furnace is low, its impact is minimal and the recovery rate remains relatively stable. When the slag quantity is substantial, slag deoxidation is effective, and slag fluidity is appropriate, titanium burn‑off is also low and consistent. Conversely, if the slag volume is excessive and its condition is poor, titanium burn‑off becomes significant and highly unstable. If the slag is too dilute, the interaction between ferrotitanium and the slag intensifies, leading to a decline in recovery; however, if the slag is overly viscous, ferrotitanium tends to float on the slag surface, resulting in increased burn‑off and reduced recovery. Poor slag deoxidation, with high iron oxide content, causes substantial oxidation losses of titanium and lowers the recovery rate. High temperatures—especially elevated slag temperatures—promote ferrotitanium burn‑off and reduce recovery. Moreover, when the steel contains a high titanium content, the recovery rate is correspondingly high; similarly, a higher concentration of other deoxidizing elements in the steel also enhances recovery. For instance, pre‑inserting aluminum–titanium before adding titanium can further improve and stabilize the recovery rate. Adding ferrotitanium directly at the furnace top, leveraging gravity, allows it to enter the molten steel more efficiently, thereby boosting the recovery rate.

2023

09-05

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