Q1. How do FeV60 and FeV80 differ in fundamental composition and density?
The main distinction lies in vanadium concentration, which shapes the refining response.
| Grade | Approx. V Content | Implication for Refining |
|---|---|---|
| FeV60 | ~60% V | Moderate density → balanced dissolution and heat absorption |
| FeV80 | ~78–82% V | High density → slower melting, higher heat demand |
FeV80 delivers more vanadium per kilogram, but this density also makes it more sensitive to refining conditions.
Q2. How does dissolution behavior differ during the refining stage?
Refining requires predictable dissolution. Here the gap is clear:
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.
Practical implications:
| Refining Behavior | FeV60 | FeV80 |
|---|---|---|
| Melting speed | Moderate-fast | Slow unless temperature is high |
| Sensitivity to slag | Moderate | High-slag can trap particles |
| Response to stirring | Good | Requires stronger stirring for uniformity |
| Risk of late dissolution | Lower | Higher in short refining cycles |
In short, FeV80 needs better furnace discipline to achieve full dissolution.
Q3. How do slag chemistry and oxygen levels affect the two grades differently?
During refining, slag composition (FeO/MnO levels) and oxygen activity are crucial.
FeV60
Reasonably tolerant of minor slag oxidation shifts
Faster melting → shorter exposure to oxidizing slag
Stable vanadium recovery across heats
FeV80
More susceptible to oxidation due to slower dissolution
Can lose vanadium to slag if trapped near the interface
Requires tighter control of FeO levels and slag viscosity
Slag viscosity also plays a role: thicker slags slow FeV80 dissolution noticeably more than FeV60.
Q4. How does vanadium recovery differ between FeV60 and FeV80 during refining?
Both grades can achieve strong recovery, but their performance windows differ.
FeV60
Performs reliably across a broader temperature range
Less likely to leave undissolved residues
More stable recovery in EAF and BOF refining sequences
FeV80
Requires high tapping/refining temperatures to unlock its full recovery potential
Slightly more recovery variability due to slower melting
Can outperform FeV60 only when conditions are optimized
So FeV80 isn't inherently "better"-it is better only under highly controlled conditions.
Q5. How should mills choose between FeV60 and FeV80 for refining operations?
A practical decision framework:
Choose FeV60 when you need:
consistent refining windows,
stable recovery across variable heats,
less sensitivity to oxygen and slag changes,
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,
long enough refining time for full dissolution.
FeV80 is a precision tool; FeV60 is the more forgiving, practical workhorse.
about Us
If you're comparing FeV60 and FeV80 for refining performance, the right choice depends on your temperature window, slag oxidation control, stirring energy, and required dosing precision.
We supply FeV40, FeV50, FeV60, and FeV80 with controlled granularity and tight impurity limits for stable furnace behavior.
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