Ferromolybdenum and Molybdenum Oxide: Market Fundamentals and Price Drivers

What Are Ferromolybdenum and Molybdenum Oxide?

Ferromolybdenum (FeMo) is a ferroalloy produced by smelting roasted molybdenum oxide with iron and a reductant such as ferrosilicon or aluminium. It is the standard carrier for adding molybdenum to steel and cast iron. Technical-grade molybdenum oxide (MoO3, typically 57-60% Mo) is the intermediate product obtained by roasting molybdenum concentrate (MoS2).

Production Routes

Molybdenum concentrate (45-57% Mo) is roasted in a multiple-hearth or fluidized-bed furnace to technical-grade MoO3. The roasted oxide is smelted with iron ore or steel scrap and a metallic reductant to produce ferromolybdenum containing 55-75% Mo.

Typical Specifications

Key Data Points

• Chinese buyers commonly reference GB/T 3649 for ferromolybdenum, while international buyers may quote European or other international specifications.
• Stainless steel grades such as 316 and 317 contain 2-3% molybdenum for pitting and chloride corrosion resistance.
• High-strength low-alloy and structural steel additions of 0.10-0.50% improve hardenability and toughness.
• Mine supply concentration: China, Chile, Peru, and the United States account for most global output.
• The stainless sector consumes roughly one quarter of global molybdenum output.

FAQ

1. Q: Why is molybdenum added to steel?
   A: Molybdenum increases hardenability, improves strength at elevated temperature, and enhances corrosion resistance.
2. Q: What is the difference between molybdenum oxide and ferromolybdenum?
   A: Oxide is the roasted intermediate used for direct furnace charging or further conversion. Ferromolybdenum is the pre-reduced alloy with higher density, preferred for ladle or AOD additions.
3. Q: Can molybdenum oxide replace ferromolybdenum in the EAF?
   A: Yes, in many EAF and stainless practices oxide briquettes give satisfactory recovery. Ferromolybdenum remains preferred for ladle additions.

Price posts dated in the past should be read as historical snapshots of market conditions, not as current offers.