Composition and Density
The main distinction between FeV60 and FeV80 lies in vanadium concentration, which shapes the refining response. FeV60 contains about 60 percent vanadium, with moderate density giving balanced dissolution and heat absorption. FeV80 contains about 78 to 82 percent vanadium, with high density giving slower melting and higher heat demand. FeV80 delivers more vanadium per kilogram, but this density also makes it more sensitive to refining conditions.
Dissolution Behavior
Refining requires predictable dissolution. FeV60 melts at a steady, manageable pace and responds well to typical 10-50 mm or 10-60 mm size ranges. FeV80 dissolves more slowly due to its higher melting energy requirement and density. In practice, FeV80 needs better furnace discipline to achieve full dissolution.
Slag and Oxygen Sensitivity
FeV60 is reasonably tolerant of minor slag oxidation shifts, melts faster and is exposed to oxidizing slag for less time, giving stable vanadium recovery across heats. FeV80 is more susceptible to oxidation due to slower dissolution, can lose vanadium to slag if trapped near the interface, and requires tighter control of FeO levels and slag viscosity. Thicker slags slow FeV80 dissolution noticeably more than FeV60.
Vanadium Recovery
Both grades can achieve strong recovery, but their performance windows differ. FeV60 performs reliably across a broader temperature range, is less likely to leave undissolved residues, and gives more stable recovery in EAF and BOF refining sequences. FeV80 requires high tapping and refining temperatures to unlock its full recovery potential, shows slightly more recovery variability due to slower melting, and can outperform FeV60 only when conditions are optimized.
How to Choose
Choose FeV60 when you need consistent refining windows, stable recovery across variable heats, less sensitivity to oxygen and slag changes, and moderate vanadium density with flexible dosing. Choose FeV80 when you have strong stirring and clean slag conditions, higher tapping temperatures, tight alloy windows requiring high-density additions, and long enough refining time for full dissolution. FeV80 is a precision tool; FeV60 is the more forgiving, practical workhorse.
Frequently Asked Questions
What is the vanadium content of FeV60? about 60 percent.
What is the vanadium content of FeV80? about 78 to 82 percent.
Why does FeV80 need stricter conditions? Its higher density and slower dissolution make it more sensitive to slag oxidation, stirring, and refining temperature.
Which grade gives more stable recovery in EAF/BOF? FeV60, across a broader temperature range and with less sensitivity to process variation.
What size ranges suit FeV60 in refining? FeV60 melts at a steady, manageable pace and responds well to typical 10-50 mm or 10-60 mm size ranges.
Why does thick slag slow FeV80 dissolution more than FeV60? FeV80 dissolves more slowly due to its higher melting energy requirement and density, so thicker slags slow its dissolution noticeably more than FeV60's.
