Available Particle Sizes for Silicon Carbide (SiC) — ZhenAn International

• Custom Distribution: Precision screening to your exact mesh or millimeter specifications ensures 100% dosing accuracy.

• Optimized Dissolution: Tailored grain sizes (1–3mm, 1–10mm) maximize surface area for rapid metallurgical reaction.

• Minimized Material Loss: High-density briquettes and dust-free grains prevent waste during EAF/BOF charging.

• Consistent Batch Quality: Automated classification systems guarantee zero "oversize" contamination in every shipment.

• Strategic Global Supply: 150,000-ton annual output allows for immediate delivery of all standard sizes to any port.

Why Particle Size Matters in Metallurgy

In industrial smelting and casting, the physical dimension of Silicon Carbide is as critical as its chemical purity. The particle size dictates the melting point, the speed of deoxidation, and the carbon recovery rate. Selecting an incorrect size can lead to material floating on the slag or escaping through the furnace exhaust, resulting in inconsistent chemistry and financial loss.

Standard Sizing Classifications and Purity Tiers

ZhenAn offers a comprehensive range of SiC sizes, meticulously screened to match specific furnace types and application methods.

Coarse Sizes: Lumps and Large Grains (10–50mm)

Coarse Silicon Carbide is the preferred choice for heavy-duty melting operations.

• EAF Charging: Large lumps have the density required to penetrate thick slag layers and react directly with the molten steel.

• Extended Reactivity: The lower surface-area-to-volume ratio provides a steady, sustained release of silicon and carbon throughout the heat.

• Handling: These sizes are easiest to manage with overhead cranes and bulk charging skips.

Medium Sizes: Metallurgical Grains (1–10mm)

Often referred to as SiC Grains, this is the most versatile size for foundries and steel mills.

• Ladle Metallurgy: Sizes like 1–3mm or 3–8mm are ideal for secondary refining, ensuring near-instant dissolution.

• Inoculation: In cast iron, 1–3mm grains provide the perfect nucleation sites for graphite flake formation, preventing brittle "white iron."

• Automated Dosing: Perfectly suited for conveyor belts and automated weighing systems.

Fine Sizes: Powders and Micronized SiC

SiC Powders are utilized in non-smelting industrial sectors.

• Refractories: Used as a binder in high-temperature furnace bricks to enhance thermal shock resistance.

• Advanced Ceramics: Micron-sized powders are sintered to create high-hardness components like pump seals and bulletproof plating.

• Abrasives: Precision-graded powders (FEPA/JIS standards) are used for grinding and polishing hardened alloys.

Briquettes: The Solution for Dust-Free Charging

For plants struggling with material loss from fine powders, ZhenAn provides SiC Briquettes (50g–100g balls).

• Uniformity: Consistent weight and shape allow for precise manual dosing.

• Recovery: They sink directly into the melt, ensuring 95%+ recovery of both silicon and carbon without dust-off.

Why Source Custom Sizes from ZhenAn International?

ZhenAn International  manages a sophisticated crushing and screening facility.

• Precision Classification: We use multi-layer vibrating screens to ensure tight particle size distribution (PSD).

• Batch Consistency: Every shipment is accompanied by a sizing report and a full COA (SGS/BV verified).

• Flexible Packaging: Available in 1-ton jumbo bags, 25kg bags, or palletized shrink-wrap for micro-powders.

Comprehensive FAQ Section

1. What is the best SiC size for an induction furnace?

For induction furnaces, 1–10mm grains are typically recommended. They provide the best balance of fast melting and high recovery without clogging the furnace lining.

2. Can you produce a custom 3–8mm size for our plant?

Yes. ZhenAn specializes in custom screening. We can produce any specific millimeter range required by your technical SOP.

3. Why should I use 1–3mm grains for ladle inoculation?

This size is small enough to react quickly in the ladle but large enough to avoid being swept away by the furnace's air currents, ensuring the graphite structure is optimized.

4. How do you prevent "fines" (dust) in a bulk lump shipment?

We utilize double-screening processes before packaging and use reinforced jumbo bags to minimize friction-induced breakage during international transit.

5. Is the price of SiC powder higher than that of lumps?

Fine powders and micronized grades are generally more expensive due to the energy-intensive milling and precision air-classification processes involved.

6. Do you provide sizing reports for every batch?

Absolutely. Each shipment includes a sieve analysis report indicating the percentage of material within your requested size range.