High-Efficiency Metallurgical Silicon Carbide 90% (0-5mm) for Advanced Foundry Casting
- Drastically Reduce Rejections: Eliminate gas-related defects and pinholes by achieving ultra-low oxygen potential in the melt.
- Lower Energy Overhead: Utilize the exothermic nature of 90% SiC to maintain tapping temperatures and reduce furnace power time.
- Precision 0-5mm Grading: Optimized particle distribution ensures rapid immersion and 95%+ recovery of Silicon and Carbon.
- Extend Ladle Campaign Life: Significantly reduce slag aggressiveness, protecting your refractory linings from chemical erosion.
- Tier-1 Factory Supply: Direct procurement from ZhenAn ensures consistent batch chemistry and high-volume availability for global foundries.
The Metallurgical Superiority of SiC 90% in Casting
In high-precision foundries, the purity of additives dictates the final grain structure of the iron. ZhenAn's 0-5mm Metallurgical SiC 90% acts as a concentrated deoxidizing agent that simultaneously conditions the base metal. Unlike low-grade silicon sources, 90% purity ensures that the metallurgical reaction is clean, leaving behind minimal residual oxides.
The deoxidation process follows a high-velocity reaction path:
This reaction is critical for producing high-strength ductile and gray iron, as it removes the dissolved oxygen that would otherwise interfere with the magnesium treatment or graphite flake formation.
Core Foundry Applications & Performance
1. In-Furnace Deoxidation
The 0-5mm sizing is specifically engineered for induction furnace charging. It provides enough surface area for a quick reaction while maintaining the density required to pass through the slag layer. This leads to a more "tranquil" melt with reduced turbulence.
2. Graphite Nucleation & Chill Control
SiC 90% serves as a potent pre-inoculant. By increasing the silicon activity in the local melt zones, it promotes a high density of eutectic cells. This effectively prevents "chill" (white iron formation) in thin sections, ensuring the casting remains machinable.
3. Slag Viscosity Modification
By reacting with FeO and MnO, our 90% SiC "dries" the slag, making it less fluid and easier to skim. This prevents slag inclusions from entering the mold, which is a leading cause of surface defects in heavy-section castings.
Technical Data & Chemical Certification
The following table highlights the unique technical parameters of ZhenAn 0-5mm SiC 90%, tailored for high-performance foundry procurement.
| Property / Component |
Guaranteed Value |
Physical Index |
Details |
| SiC Content (Min) |
90.00% |
Particle Size |
0 - 5 mm (90% min) |
| Free Graphite (C) |
≤2.8% |
Appearance |
Black Crystalline Granules |
| Iron Oxide (Fe₂O₃) |
≤1.2% |
Bulk Density |
1.52 g/cm³ |
| Aluminum (Al) |
≤0.7% |
Specific Gravity |
3.18 g/cm³ |
| Nitrogen (N) |
≤0.012% |
Packaging |
1mt / 1.2mt Big Bags |
Why Foundry Engineers Trust ZhenAn SiC 90%
- Cleanliness of Melt: Our 90% grade contains significantly lower trace elements (Al, S, P) than standard 88% grades, making it ideal for safety-critical automotive castings.
- Superior Solubility: The 0-5mm range is carefully screened to ensure zero oversized lumps, preventing "cold spots" or undissolved material in the furnace hearth.
- Logistical Expertise: ZhenAn provides comprehensive export documentation, including SGS inspection and COA, ensuring a seamless supply chain from China to your facility.
FAQ: Frequently Asked Questions
1. How does SiC 90% improve the machinability of gray iron?
By providing a massive amount of nucleation sites, SiC 90% ensures that carbon precipitates as fine graphite flakes rather than hard, brittle iron carbides. This makes the iron much softer for cutting tools, reducing machining time and tool replacement costs.
2. Why is 0-5mm sizing better for induction furnaces?
The 0-5mm range provides the perfect "immersion profile." Finer powders tend to be lost to the extraction system, while larger lumps take too long to dissolve. 0-5mm provides an immediate reaction while ensuring the material stays within the molten bath.
3. Can SiC 90% replace traditional Ferrosilicon?
Yes. In most foundry applications, 1 unit of SiC 90% can replace a significant portion of FeSi 75 while also providing a "free" carbon source. This reduction in the total number of additives simplifies the charging process and lowers the total cost per ton.
4. What is the shelf life of ZhenAn SiC 90% granules?
SiC is chemically inert and does not degrade over time. If kept in its original moisture-proof packaging in a dry warehouse, the material will maintain its chemical integrity and performance indefinitely.
5. How much SiC 90% should be added per heat?
Typical addition rates range from 0.4% to 1.0% of the total charge weight. However, the exact amount depends on your desired final Silicon and Carbon Equivalent (CE) and the quality of your scrap metal.
6. Does ZhenAn provide third-party testing for chemical purity?
Absolutely. While we conduct rigorous internal lab testing for every lot, we also partner with SGS, Bureau Veritas, and TUV to provide independent verification of our SiC content and size distribution upon client request.
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