High Purity Silicon Metal 421 Lump

Silicon Metal grade 421 is true "Chemical Grade" silicon metal. It is born for these high-value industries:

Silicone Industry: The core feedstock for producing high-performance silicone rubber, silicone resins, sealants, and silicone fluids.

Polysilicon Base: Serves as a reliable, highly pure base material for manufacturing solar-grade and electronic-grade polycrystalline silicon.

Advanced Refractories: Used as an essential additive in high-temperature specialty ceramics.

In sensitive chemical reactions, even a tiny bit of impurity can be a "catalyst poison." Our grade 421 has the strictest bottom line for core micro-elements to protect your production.

• Shape: Irregular lumps showing a bright silver-gray metallic luster.
• Standard Sizes: 10-50mm, 50-100mm. Because we have our own CNC crushing lines, we fully support custom sizes to perfectly match your reactor's feeding port.
• Packing: Packed in 1 Metric Ton heavy-duty waterproof Jumbo bags with bottom wooden pallets. Safe for long ocean transit. A normal 20ft container can load about 20 to 24 tons.

As a direct manufacturer deeply rooted in metallurgical materials, we maintain a highly consistent standard across all our production steps. This consistency is exactly why top global chemical companies trust us:

1. High-Grade Raw Silica: We only use top-grade quartz stone for our submerged arc furnaces. We cut off heavy metal impurities right from the starting point.
2. Extremely Clean Surface: Every batch of our 421 lumps goes through careful finishing and washing before packing. No oxidation skin, no slag, and no heavy dust. This keeps your melting pot 100% clean.
3. Precise Crushing & Screening: We use multi-layer vibrating screens. Uniform lump sizes mean faster melting efficiency for you, and it stops you from wasting money on useless dust losses.

Q: What is the real difference between Silicon Metal 421 and 553?

A: Grade 553 is standard metallurgical grade with higher impurities. Grade 421 is chemical grade; it keeps Aluminum (Al) and Calcium (Ca) extremely low, specifically designed for sensitive chemical synthesis where impurities cannot be tolerated.

Q: What is your typical lead time?

A: For standard 421 lumps, we usually deliver the cargo to Huangpu Port or Tianjin Port within 7-15 days after receiving your deposit.

Q: Can I request a specific crushing size, like 20-80mm?

A: Yes, absolutely. We run our own crushing and screening workshop. Just tell us your equipment's feeding requirements, and we will customize the sizes for you without any headache.

Q:Do you provide 421 Silicon Metal in powder form?
A:Yes, absolutely. In addition to silicon metal lumps, we operate our own professional grinding and screening workshop. We can process High Purity 421 Silicon Metal into powder form with customized particle sizes, such as 200 mesh, 325 mesh, or other specific micron sizes to meet your chemical synthesis requirements. Our silicon powder maintains the same strict impurity control (Al ≤ 0.20%, Ca ≤ 0.01%) as our lumps.

Don't let high-impurity materials ruin your expensive chemical reactions. Contact ZhenAn's expert export team right now to get a workable CIF quote to your port and check the current lead time.

(Contact Form: Name, Email, Destination Port, Required Quantity, Specific Size)

 E-mail:sale@zanewmetal.com

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