Products Description
Ferro manganese is a ferroalloy composed of Ferro and manganese. The Mn element's density is 7.43g/cm3, melting point is 1245℃, the boiling point is 2150℃.
Ferro manganese is widely used in steel making as a deoxidizer and an alloying agent. Manganese reacts readily with oxygen to form stable manganese oxide.
Ferro Manganese Specification
| Grade | Mn | C ≤ | Si ≤ | P ≤ | S ≤ | |
| Low Carbon Ferro Manganese | FeMn88C0.2 | 85.0-92.0 | 0.2 | 2.0 | 0.3 | 0.02 |
| Low Carbon Ferro Manganese | FeMn84C0.4 | 80.0-87.0 | 0.4 | 2.0 | 0.3 | 0.02 |
| Low Carbon Ferro Manganese | FeMn84C0.7 | 80.0-87.0 | 0.7 | 2.0 | 0.3 | 0.02 |
| Low Carbon Ferro Manganese | FeMn82C1.0 | 78.0-85.0 | 1.0 | 2.5 | 0.35 | 0.03 |
| Medium Carbon Ferro Manganese | FeMn82C1.5 | 78.0-85.0 | 1.5 | 2.5 | 0.35 | 0.03 |
| Medium Carbon Ferro Manganese | FeMn78C2.0 | 75.0-82.0 | 2.0 | 2.5 | 0.40 | 0.03 |
| High Carbon Ferro Manganese | FeMn78C8.0 | 70.0-82.0 | 8.0 | 2.5 | 0.33 | 0.03 |
| High Carbon Ferro Manganese | FeMn74C7.5 | 70.0-77.0 | 7.5 | 3.0 | 0.38 | 0.03 |
| High Carbon Ferro Manganese | FeMn68C7.0 | 65.0-72.0 | 7.0 | 4.5 | 0.40 | 0.03 |
Three Types Of Ferro Manganese
High carbon ferro manganese ( C: 7% approx)
Medium carbon ferro manganese ( C: 1.0-2% approx)
Low carbon ferro manganese ( C: 1.0% max)
Ferro Manganese Uses
Ferro manganese used in the steel industry: Ferro manganese is used as a deoxidizer and desulfurizer in steelmaking. High-quality steel is deoxidized and desulphurized in smelting. Adding a suitable amount of ferromanganese to the molten steel can reduce the harmful element, and improve the quality of the steel. In the steel industry, the consumption of ferromanganese is about 3-5kg FeMn75# to produce one-ton steel.
Ferro manganese used in the foundry industry: Ferro manganese is used as a nucleating agent and nodulizing agent for nodular cast iron. It accelerates the graphite precipitation, shortens the nodulizing time, reduces the impurity in the molten steel, improves the quality of the cast iron, Reduces the blockage of the smelting furnace nozzle, and effectively prolongs the service life of the smelting furnace.
Ferro manganese used in other industries: High carbon Ferro manganese is used as a reducing agent in low carbon ferroalloys production. HC Ferro manganese powder can also be used in welding materials and mineral separation. High manganese ferromanganese can be used in the electrical industry to produce the semiconductor pure manganese and can be used in the chemical industry to produce manganese ketone.
Case Study
Background:
Ferro Manganese (FeMn) is an essential additive in steelmaking, providing manganese for deoxidation, desulfurization, and alloying. In 2025, Nordic Steel AB, a Swedish electric arc furnace (EAF) steel producer, faced pressure from EU carbon border adjustments. Their standard High Carbon Ferro Manganese (HC-FeMn) - purchased from a legacy South African smelter - carried an embedded carbon footprint of 2.9 t CO₂ per ton of FeMn. This accounted for 18% of their total Scope 3 emissions.
Objective:
Reduce the carbon intensity of purchased FeMn to below 1.8 t CO₂/t FeMn while maintaining Mn content ≥76% and P ≤0.20%.
Methodology:
Nordic partnered with a Brazilian FeMn producer to implement three changes:
Ore Blending: Mixed 40% high-grade Gabonese ore (Mn 52%, low Fe) with 60% local Brazilian carbonate ore (Mn 42%). This reduced slag volume by 22%.
Submerged Arc Furnace (SAF) Modifications: Switched from open slag operation to a sealed, pre-reduction kiln feeding pre-heated ore at 700°C.
Carbon Source Substitution: Replaced 30% of metallurgical coke with biocarbon (wood char from managed plantations).
Results (12-month production trial):
| Parameter | Conventional FeMn | Optimized FeMn | Change |
|---|---|---|---|
| Mn content (%) | 76.2% | 77.1% | +0.9% |
| Carbon footprint (t CO₂/t FeMn) | 2.91 | 1.72 | -41% |
| Electrical energy (MWh/t FeMn) | 3.2 | 2.5 | -22% |
| Phosphorus (wt%) | 0.22% | 0.19% | -0.03% |
| Production cost (USD/t) | 1,180 | 1,210 | +2.5% |
Challenges Encountered:
Biocarbon had lower mechanical strength, causing partial dusting in the feed system (addressed by pelletizing with molasses binder).
Higher Mn recovery (89% vs 83%) increased tap hole refractory wear; switched to high-alumina monolithic lining.
Economic & Environmental Impact:
Nordic paid a €45/t premium for low-carbon FeMn, but saved €68/t in EU carbon allowance purchases.
Annual FeMn consumption: 28,000 t → net saving of €644,000 per year.
The Brazilian smelter obtained an EPD (Environmental Product Declaration) and gained entry into four European automotive supply chains requiring low-emission steel.
Conclusion:
Decarbonizing FeMn is technically feasible without sacrificing manganese yield. The key levers are: (1) high-grade ore blending to reduce slag energy, (2) bio-carbon substitution up to 30%, and (3) pre-heating feed to lower electrical demand. The 2.5% cost increase was fully offset by carbon market savings.
Key Takeaway for Industry:
Ferro Manganese is often treated as a commodity, but the gap between high-carbon (2.9 t CO₂/t) and low-carbon (1.7 t CO₂/t) FeMn is already creating two distinct markets. Steelmakers who lock in low-carbon FeMn contracts now will avoid both carbon taxes and supply chain re-qualification costs post-2027. For FeMn smelters, ore flexibility and biocarbon logistics are the new competitive moats.
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