88% Silicon Carbide Granules (0-5mm) - High-Efficiency Deoxidizer for Precision Foundry Casting
Zero-Defect Castings: Eliminate gas-related pinholes and subsurface porosity by maintaining an ultra-low oxygen potential.
Optimized Graphite Structure: Promote "Type A" graphite flake formation and prevent brittle "chill" in thin-walled sections.
Rapid Melt Integration: The 0-5mm granular distribution is engineered for immediate immersion and 95%+ recovery rates.
Slash Processing Costs: A high-yield substitute for expensive Ferrosilicon 75 and synthetic graphite recarburizers.
ZhenAn Factory Direct: Guaranteed chemical consistency with ISO-certified testing and streamlined global export logistics.
The Metallurgical Dynamics of 0-5mm SiC 88%
In the high-stakes environment of iron and steel casting, the metallurgical "pre-conditioning" of the melt determines the final product quality. ZhenAn's 0-5mm Silicon Carbide 88% acts as a potent deoxidizing agent that effectively cleans the molten bath while introducing vital alloying elements.
The dissociation reaction in the furnace is highly efficient: SiC + 3[O] → SiO₂ + CO↑
The resulting CO gas provides a subtle internal stirring effect, which assists in the flotation of non-metallic inclusions to the slag layer, ensuring a cleaner, more homogenous base metal for ductile and gray iron.
Core Applications & Foundry Benefits
Gray and Ductile Iron Pre-treatment
SiC 88% is the ultimate "chill" reducer. By increasing the silicon activity and providing stable carbon nuclei, it prevents the formation of hard iron carbides (cementite), resulting in castings with superior machinability and higher tensile strength.
Induction Furnace "Sandwich" Charging
The 0-5mm sizing is ideal for "sandwich" charging. Placing the granules between scrap layers ensures maximum contact time during the melting phase, preventing the material from floating on the slag and increasing the total Silicon and Carbon recovery.
Slag Viscosity & Fluidity Control
By reducing the iron oxide (FeO) and manganese oxide (MnO) content in the slag, our SiC 88% makes the slag more "dry" and friable. This allows for easier skimming and significantly reduces chemical erosion on the furnace's neutral or basic refractory linings.
Technical Properties & Certified Specifications
The following parameters detail the chemical and physical consistency of ZhenAn 0-5mm Metallurgical SiC 88, specifically processed for industrial foundry lines.
| Quality Index |
Certified Value |
Physical Profile |
Details |
| SiC Content (Min) |
88.0% |
Size Distribution |
0 - 5 mm (92% Min) |
| Free Carbon (C) |
2.5% - 4.5% |
Hardness |
9.0 - 9.1 Mohs |
| Aluminum (Al) |
≤ 0.9% |
Bulk Density |
1.45 - 1.55 g/cm³ |
| Sulfur (S) |
≤ 0.05% |
Specific Gravity |
3.18 g/cm³ |
| Moisture (Max) |
0.4% |
Appearance |
Angular Grey Granules |
Why Procurement Teams Choose ZhenAn SiC 88%
Minimal Dust Loss: Our 0-5mm product undergoes secondary aspiration to remove ultra-fine particles, ensuring the material sinks into the melt rather than being lost to the exhaust system.
Low Nitrogen Input: Ideal for producing high-quality automotive and pressure-tight castings where nitrogen-induced brittleness must be avoided.
Global Supply Continuity: With our dedicated crushing and screening facilities, ZhenAn provides a stable buffer against market price fluctuations and guarantees rapid 15-day lead times.
FAQ: Frequently Asked Questions
Is 0-5mm sizing better than 1-10mm for induction furnaces?
The 0-5mm range provides a higher surface area, leading to a faster reaction time. It is particularly effective in small-to-medium induction furnaces where the stirring cycle is shorter and rapid dissolution is required to prevent "fade."
How does SiC 88% improve the life of my furnace lining?
Aggressive iron oxides in the slag are the primary cause of refractory wear. By deoxidizing the slag at the slag-metal interface, SiC 88% makes the slag chemically inert, thereby extending the campaign life of the lining bricks.
Can I use SiC 88% to replace 100% of my ferrosilicon?
In many gray iron applications, yes. Every 1kg of SiC 88 provides approximately 0.6kg of Silicon and 0.25kg of Carbon. By balancing your charge with SiC, you can often eliminate expensive FeSi and reduce your carbon raiser consumption by 20-30%.
Does using Silicon Carbide increase the risk of pinholes?
No, it reduces it. Pinholes are often caused by excessive oxygen or hydrogen. SiC 88% aggressively scavenges oxygen and creates a CO boil that helps "flush" other gases from the melt, leading to sounder castings.
What is the storage requirement for the 1.0mt jumbo bags?
While SiC is chemically stable, we recommend storing the bags on a dry, level surface. ZhenAn's export bags include a heavy-duty moisture-proof liner to prevent moisture pickup, ensuring the material stays dry for immediate furnace use.
Does ZhenAn provide a Certificate of Analysis (COA) for each batch?
Yes. Every shipment is sampled and tested in our laboratory using XRF and titration methods. We provide a full COA with every delivery and can arrange for third-party inspections (SGS/BV) upon client request.
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