Silicon Carbide Lump 88% 10-50mm for Furnace Additive High Carbon SiC for Steelmaking
Heavy-Duty Silicon Carbide Lump 88% (10-50mm) for High-Volume Steelmaking
- Lower Energy Consumption: Leverage the high exothermic reaction of SiC lumps to reduce electrical power requirements in EAF operations.
- Stable Slag Deoxidation: Effectively "kill" the slag and reduce FeO/MnO levels for better alloy recovery and cleaner steel.
- Optimized for Heavy Scrap: The 10-50mm lump size is designed to withstand heavy charging without being blown out by furnace fans.
- Dual-Action Chemistry: Eliminate the cost of separate ferrosilicon and high-sulfur petroleum coke with a single high-carbon SiC source.
- Guaranteed Bulk Supply: ZhenAn provides stable, large-tonnage shipments with consistent chemical sizing for global steel mills.
The Strategic Value of SiC Lumps in Furnace Charging
In large-scale steel production, material physical form is just as important as chemical purity. The 10-50mm Silicon Carbide Lump is the preferred choice for primary furnace charging. Unlike finer grains, these heavy lumps penetrate deep into the scrap charge, ensuring the reaction occurs at the heart of the melt.
As the lumps dissolve, they provide a consistent release of Silicon and Carbon:
This process not only alloys the steel but also acts as a "chemical fuel," accelerating the melting process and improving the overall productivity (tons per hour) of the furnace.
Key Applications & Operational Benefits
1. Electric Arc Furnace (EAF) Primary Charge
Silicon Carbide 88% lumps are added during the initial scrap basket charge. Their high density ensures they remain at the bottom of the furnace, providing a sustained deoxidation effect throughout the heat.
2. Converter (BOF) Coolant & Heat Balance
In Basic Oxygen Furnaces, SiC lumps can be used to balance the thermal energy. If the melt is too cold, the exothermic oxidation of SiC raises the temperature more efficiently than adding extra hot metal or scrap.
3. High-Carbon Steel Production
For grades requiring significant carbon pickup, SiC 88% provides a low-nitrogen, low-sulfur carbon source that is more predictable than anthracite coal, leading to tighter chemistry hits and fewer re-blows.
Technical Specifications & Charge Parameters
The following table highlights the structural and chemical robustness of ZhenAn 10-50mm Silicon Carbide Lumps.
| Quality Index |
Typical Value |
Physical Property |
Details |
| SiC Content |
88.0% min |
Size Distribution |
10-50mm (90% min) |
| Fixed Carbon |
2.0%−4.0% |
Crushing Strength |
High (Low Fines Generation) |
| Free SiO₂ |
≤3.5% |
Specific Gravity |
3.18 g/cm³ |
| Sulfur (S) |
≤0.04% |
Melting Point |
2,700°C (Sublimation) |
| Phosphorus (P) |
≤0.03% |
Packaging |
1.0mt or 1.5mt Big Bags |
Why Steelmakers Trust ZhenAn SiC Lumps
- Minimal Dusting: Our 10-50mm lumps undergo secondary screening to ensure that fines are removed, preventing baghouse clogging and material waste.
- Refractory Protection: By reducing the oxygen potential of the slag early in the process, our SiC helps form a protective "foamy slag" that shields the furnace walls from arc radiation.
- Predictable Recovery: With a stable 88% purity, furnace operators can use standard calculation models to hit target Silicon and Carbon levels with 95% confidence.
FAQ: Frequently Asked Questions
1. Why use 10-50mm lumps instead of 1-10mm granules?
Lumps are designed for the primary charge (melting stage), where they need to survive the mechanical impact of scrap and the high-velocity air in the furnace. Granules are better suited for ladle trimming or induction furnaces.
2. How does SiC 88% help in reducing Nitrogen in steel?
Many carbon raisers (like certain coals) contain high nitrogen. Silicon Carbide is virtually nitrogen-free. By replacing coal with SiC 88%, you can produce low-nitrogen steel grades more reliably.
3. What is the impact of SiC lumps on the "Foamy Slag" process?
The CO gas generated from the SiC reaction (SiC + FeO → Fe + Si + CO) helps create a consistent, thick foam. This foamy slag improves energy efficiency by insulating the arc and protecting the refractories.
4. Can SiC 88% lumps be used in Basic Oxygen Furnaces (BOF)?
Yes. In BOF operations, SiC is often used as a "heat riser" or chemical fuel. It is particularly useful when the scrap-to-hot-metal ratio is high and extra thermal energy is required to maintain the liquidus temperature.
5. How do I calculate the replacement ratio of FeSi 75 to SiC 88?
Generally, 1 ton of SiC 88 provides approximately the same amount of Silicon as 1.15 tons of FeSi 75, while also providing roughly 250kg of "free" Carbon. This allows for significant cost savings in raw material procurement.
6. Does ZhenAn provide moisture-proof packaging for sea freight?
Yes. Our SiC 10-50mm lumps are packed in heavy-duty, UV-resistant jumbo bags with internal plastic liners to ensure the material arrives dry and ready for immediate furnace charging.
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