High Carbon Ferro Silicon Lump
Overview
Stable Deoxidizer & Cost-Control Alloy for BOF and EAF Steelmaking
High Carbon Ferro Silicon Lump is a silicon–iron–carbon alloy used in steelmaking operations where both deoxidation efficiency and cost control are critical. It is typically produced in submerged arc furnaces using quartz, carbon reductants, and iron-bearing materials under controlled high-temperature reduction conditions.
Compared with using ferrosilicon and recarburizer separately, this material provides a more stable and simplified addition practice in converter and electric arc furnace operations, especially where charge consistency and recovery rate are key concerns.
In real steel plant applications, the value of this product is not only its chemical composition, but how predictably it behaves during furnace addition and slag-metal interaction.
Chemical Composition
|
Element |
Typical Range |
Functional Role in Steelmaking |
|
Si |
65% – 75% |
Primary deoxidation, improves steel cleanliness |
|
C |
1.0% – 2.5% |
Supports controlled recarburization |
|
Al |
≤ 1.5% |
Controlled to reduce inclusion risk |
|
P |
≤ 0.04% |
Helps maintain structural steel toughness |
|
S |
≤ 0.02% |
Protects hot workability |
|
Fe |
Balance |
Base matrix |
Rather than focusing only on nominal silicon content, we also monitor impurity behavior because small variations in P, S, and Al can significantly affect downstream ladle refining time and steel quality stability.
Particle Size & Physical Characteristics
The physical form of the material directly affects how it behaves in furnace charging systems.
• Standard sizes: 10–50 mm / 10–100 mm.
• Custom sizing available based on furnace feeding method.
• Appearance: Irregular metallic grey lumps with crystalline fracture surface.
• Bulk density: Suitable for gravity and chute feeding systems.
• Fines control: Under-size fraction is maintained at a low level during loading to reduce loss during handling and furnace injection
In practical use, consistent lump size helps reduce segregation during transport and improves penetration through slag layers in BOF/EAF operations.
Production Method
The material is produced through a submerged arc furnace process:
- Quartz is reduced with carbonaceous materials at high temperature
- Silicon is formed and absorbed into molten iron phase
- Alloy is cast, cooled, and mechanically crushed
- Material is screened into defined size ranges
- Final batch is analyzed before shipment approval
This production route allows better control over silicon recovery and impurity distribution compared with simple mechanical blending methods.
How It Performs in Steelmaking
In industrial furnace practice, this material is mainly used for:
Deoxidation during tapping or refining
Silicon reacts with dissolved oxygen in molten steel, helping reduce oxygen content and improving steel cleanliness.
Controlled carbon adjustment
The carbon content supports basic recarburization without introducing unstable carbon sources.
Furnace temperature stability
Silicon oxidation generates heat, which helps reduce temperature drop during addition, especially in ladle treatment stages.
Slag-metal interaction improvement
Proper lump density allows better penetration through slag, improving reaction efficiency at the metal interface.
Application Scope
Basic Oxygen Furnace (BOF) steelmaking
Electric Arc Furnace (EAF) operations
Ladle furnace (LF) refining
Foundry cast iron adjustment
Alloy blending systems in integrated steel plants
Quality Control & Traceability
We operate batch-level traceability for industrial procurement requirements.
• Furnace heat number tracking for each shipment
• Spectrometer testing before release
• COA provided for every batch
• Optional third-party inspection (SGS / BV / Intertek)
• Sampling procedures available upon request
This structure is designed to support long-term supply contracts where consistency is more important than one-time chemical compliance.
Certificate
Packaging & Export Handling
Standard export packaging includes:
1MT jumbo bags with moisture-resistant inner liner
25kg multi-layer bags for controlled dosing systems
Palletized container loading for transport stability
20GP / 40HQ container shipment options
Packaging is designed to reduce moisture exposure and minimize fines generation during long-distance ocean transport.
FAQ
Q: Is this product replacing FeSi75 completely?
A: Not completely. It is typically used in partial substitution depending on furnace practice and cost structure.
Q: What is the main advantage in real production?
A: More stable behavior during addition, especially when both silicon and carbon adjustments are required in one step.
Q: Can it be tested in small trial orders?
A: Yes. Trial shipments are commonly used to evaluate furnace compatibility before long-term contracts.
Q: How do you ensure batch consistency?
A: Each furnace heat is tested separately, and only qualified batches are released for shipment.
Q: What affects price most?
A: Raw quartz quality, carbon source stability, and silicon recovery efficiency during smelting.
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