Silicon Carbide 88% Metallurgical Grade for Casting Industry 0-10mm Furnace Additive
High-Purity Metallurgical SiC 88% (0-10mm) - Advanced Furnace Additive for the Casting Industry
- Curb Shrinkage Defects: Improve molten iron fluidity and solidification patterns to eliminate internal porosity in complex castings.
- Dual-Action Enrichment: Simultaneously boost Silicon and Carbon levels with a single addition, simplifying your furnace charge recipe.
- Broad 0-10mm Gradation: The wide size distribution ensures an ideal reaction rate throughout both the melting and holding phases.
- Minimize Chill & Hard Spots: Promote superior graphite precipitation (A-type) to enhance the machinability of gray and ductile iron.
- Factory-Direct Consistency: ZhenAn provides high-tonnage reliability with certified chemical purity for 24/7 foundry production lines.
The Role of SiC 88% in Modern Foundry Metallurgy
In the production of high-strength iron castings, the chemical environment of the furnace determines the final mechanical properties. ZhenAn's 0-10mm Metallurgical SiC 88% acts as a potent deoxidizing agent and a long-lasting nucleating source. Unlike metallic silicon, SiC introduces silicon into the melt in a nascent state, which is far more effective at promoting graphite flake growth.
The deoxidation reaction is highly efficient at standard foundry temperatures:
The resulting CO gas provides a subtle internal stirring, which helps float non-metallic inclusions to the slag layer, ensuring a cleaner, more homogenous base metal.
Key Applications & Performance Gains
Gray and Ductile Iron Production
For foundries producing engine blocks, valves, or automotive parts, SiC 88% is essential for "Graphite Refinement." It significantly increases the number of eutectic cells, which prevents the formation of brittle iron carbides (cementite) in thin cross-sections.
Induction & Cupola Furnace Charging
The 0-10mm sizing is perfectly balanced for diverse furnace types. In induction furnaces, it provides a stable recovery rate without the high "burn-off" seen with finer powders. In cupolas, the larger particles survive the blast zone to react effectively at the hearth.
Slag Viscosity Control
By reducing the iron oxide (FeO) and manganese oxide (MnO) content in the slag, our SiC 88% makes the slag more "short" and friable. This allows for easier slag removal and protects the furnace refractories from chemical corrosion.
Technical Properties & Product Specification
The following table outlines the rigorous chemical and physical standards maintained by ZhenAn for our 0-10mm Metallurgical Silicon Carbide.
| Quality Metric |
Targeted Value |
Physical Property |
Details |
| SiC Content |
88.0% min |
Size Range |
0 - 10 mm (Adjustable) |
| Free Graphite |
3.0%−5.0% |
Specific Gravity |
3.16 g/cm3 |
| Alumina (Al₂O₃) |
≤1.2% |
Melting Point |
∼2,700°C |
| Sulfur (S) |
≤0.045% |
Hardness |
9.1 Mohs |
| Moisture |
≤0.5% |
Packaging |
1mt Jumbo Bags / 25kg Bags |
Why Foundry Engineers Prefer ZhenAn SiC 88%
- Stable Nucleation: Our SiC 88% provides a "memory effect" in the melt, meaning the inoculation benefits last longer than traditional ferrosilicon-based inoculants.
- Low Gas Pickup: With ultra-low nitrogen and hydrogen levels, our material helps prevent gas-related surface defects in precision castings.
- Customized Gradation: While 0-10mm is the standard, we can customize the screening to provide 0-5mm or 3-10mm depending on your automated dosing system requirements.
FAQ: Frequently Asked Questions
Why use 0-10mm SiC instead of pure Silicon metal?
Silicon Carbide is more cost-effective and provides both Silicon and Carbon. Furthermore, the dissociation of SiC in molten iron is an exothermic reaction, which helps maintain furnace temperature, whereas Silicon metal additions can sometimes "chill" the local area of the melt.
How does SiC 88% improve the machinability of castings?
By promoting the formation of graphite flakes and reducing the presence of hard iron carbides, the resulting iron is much easier to drill, mill, and turn. This leads to longer tool life and lower finishing costs for your customers.
What is the recommended addition timing for induction furnaces?
For best results, SiC 88% should be added with the initial scrap charge (the "sandwich" method). This maximizes the contact time between the SiC and the melting scrap, ensuring the highest possible recovery rates for both Silicon and Carbon.
Can 0-10mm SiC be used in ladle inoculation?
While 0-10mm is primarily a furnace additive, the finer fraction of the 0-10mm range can provide some inoculating effect in the ladle. However, for dedicated ladle inoculation, we recommend our 1-3mm or 1-5mm sized products.
How does ZhenAn verify the purity of the material?
Every batch is sampled and tested in our internal laboratory using chemical titration and XRF analysis. We provide a comprehensive Certificate of Analysis (COA) for every shipment to ensure it meets the 88% minimum SiC requirement.
Does the material cause any extra wear on furnace linings?
No. In fact, by deoxidizing the slag and reducing its acidity, SiC 88% typically extends the life of neutral and basic furnace linings by preventing chemical erosion from iron oxides.
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