High-Performance Metallurgical Silicon Carbide 90% Lump (10-50mm) for Steel Plant Application
- Deep-Melt Penetration: Robust 10-50mm lumps bypass the slag layer to react directly with the molten bath, maximizing recovery rates.
- Thermal Energy Efficiency: Harness the intense exothermic reaction of 90% SiC to maintain tapping temperatures and reduce electrode power consumption.
- Superior Deoxidation: Rapidly scavenges dissolved oxygen to produce cleaner steel with significantly lower non-metallic inclusion counts.
- Low-Sulfur Carbon Source: Achieve precise recarburization without the harmful sulfur impurities found in traditional petroleum coke or anthracite.
- Tier-1 Industrial Supply: Direct procurement from ZhenAn ensures high-volume availability and batch-to-batch chemical consistency.
The Metallurgical Dynamics of 10-50mm SiC Lumps
In high-tonnage Electric Arc Furnaces (EAF) and Basic Oxygen Furnaces (BOF), the physical integrity of additives is as vital as their chemistry. ZhenAn's 10-50mm Silicon Carbide Lumps are engineered to withstand the mechanical impact of heavy scrap charging. Unlike finer granules, these robust lumps reach the hearth where they provide a sustained release of active Silicon and Carbon.
The deoxidation reaction in the furnace follows a high-velocity path: SiC + 2FeO → 2Fe + SiO₂ + CO↑
The resulting CO gas promotes a vigorous "boil" in the bath, which assists in the removal of hydrogen and nitrogen, leading to higher-quality, low-gas steel grades.
Strategic Advantages for Steel Plant Operations
Enhanced Foamy Slag Control
By reducing iron oxides in the slag, SiC 90% lumps facilitate the creation of a consistent, stable foamy slag. This foam shields the furnace refractories from intense arc radiation, drastically reducing energy loss and extending the life of the furnace shell.
Chemical Fuel for Heat Balancing
The oxidation of Silicon Carbide is more exothermic than that of standard ferrosilicon. For mills looking to increase their scrap-to-hot-metal ratio, these lumps serve as a critical "heat riser," providing the thermal energy necessary for high-productivity melting.
Refractory Wear Reduction
Aggressive iron oxides are the primary cause of erosion in furnace linings. Our 90% SiC lumps rapidly "kill" the slag at the interface, protecting your refractory investment and lowering annual maintenance costs.
Technical Properties & Certified Standards
The following table outlines the chemical and structural robustness of ZhenAn 10-50mm Silicon Carbide Lumps, optimized for heavy industrial charging.
| Quality Metric |
Guaranteed Value |
Physical Feature |
Details |
| SiC Purity (Min) |
90.0% |
Size Distribution |
10 - 50 mm (95% min) |
| Free Carbon (C) |
≤ 2.8% |
Lump Hardness |
High (Low Friability) |
| Iron Oxide (Fe₂O₃) |
≤ 1.2% |
True Density |
3.20 g/cm³ |
| Sulfur (S) |
≤ 0.04% |
Appearance |
Dark Metallic Grey |
| Moisture (Max) |
0.5% |
Packaging |
1,250kg Moisture-proof Bags |
Why Procurement Teams Rely on ZhenAn
- Minimal Material Waste: Our 10-50mm lumps undergo secondary screening to remove small fragments and dust, ensuring that every ton purchased reaches the molten bath.
- Supply Chain Resilience: With a massive annual output capacity, ZhenAn provides a stable buffer against market price fluctuations and guarantees rapid lead times for international shipments.
- Verified Export Quality: Every shipment is accompanied by a full laboratory report. We facilitate independent third-party inspections (SGS/BV) at the port of loading to verify chemical and physical specs.
FAQ: Frequently Asked Questions
Why use 10-50mm lumps instead of smaller granules in a BOF?
In a Basic Oxygen Furnace (BOF), the upward gas velocity is extreme. 10-50mm lumps have the necessary mass to sink through the slag and stay in the reaction zone, whereas smaller granules would be blown out of the furnace by the blast.
How does SiC 90% help in reducing Nitrogen levels?
Many carbon raisers introduce Nitrogen into the melt, leading to brittleness. Silicon Carbide is virtually Nitrogen-free. By using SiC 90% as a carbon source, you can produce Nitrogen-sensitive steel grades more reliably.
Does using Silicon Carbide increase the risk of slag inclusions?
Actually, it reduces them. By converting sticky iron oxides into liquid iron and silica (which floats easily), SiC 90% makes the slag much "shorter" and easier to remove, preventing slag from being trapped in the final ingot.
Can this material be used for slag conditioning in the ladle?
While 10-50mm lumps are primarily used in the furnace, they can be used in the ladle if there is sufficient stirring. However, for precision ladle trimming, we generally recommend our 1-3mm granular products for faster dissolution.
What is the Silicon Equivalent of SiC 90%?
For calculation purposes, 100kg of SiC 90% provides approximately 63kg of active Silicon and 27kg of Carbon. This high concentration allows for a massive reduction in the total weight of additives required per heat.
Does ZhenAn provide moisture-proof packaging for sea freight?
Absolutely. All export-grade SiC is packed in heavy-duty, UV-resistant jumbo bags with internal PE moisture-proof liners to ensure the material arrives dry and chemically active regardless of shipping duration.
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