Silicon Metal 2202

Silicon Metal 2202 is a premium‑grade industrial silicon with a guaranteed silicon content of 99.5% minimum and exceptionally low impurity limits: Iron ≤ 0.2%, Aluminium ≤ 0.2%, and Calcium ≤ 0.02%. Its designation "2202" reflects this strict control over the three most critical contaminant elements. This silver‑grey metallic material offers a high melting point (1414°C), low thermal expansion, excellent electrical conductivity, and strong oxidation resistance. It serves as the cornerstone for manufacturing high‑strength aluminium alloys, high‑performance silicone polymers, solar‑grade polysilicon, and advanced refractories. With its ultra‑clean chemistry, 2202 is the material of choice for industries that cannot tolerate even trace levels of impurities – such as aerospace, electronics, and photovoltaic applications.

Application Scenaros – Where 2202 Delivers Outstanding Performance

• Premium Aluminium Alloys (Aerospace & Automotive)
  The ultra‑low iron and calcium content of 2202 makes it the ideal alloying agent for high‑strength, corrosion‑resistant aluminium alloys used in aircraft fuselages, landing gear, engine pistons, and high‑performance racing wheels. It enhances fluidity during casting, reduces hot tearing, and improves anodising uniformity – critical for components that must meet stringent aviation and military specifications. Compared to 2202, 2202 offers a noticeable improvement in elongation and fatigue resistance.
• High‑Performance Silicone Polymers
  In the silicone industry, trace impurities – especially iron and aluminium – can act as catalysts for side reactions, reducing polymer molecular weight and causing discolouration. Our 2202, with its extremely low metal content, yields purer methyl chlorosilanes in the Rochow process, resulting in clearer silicone oils, more transparent sealants, and high‑temperature‑resistant rubbers. This is particularly valued in medical‑grade silicones and optical encapsulants.
• High‑Grade Refractories & Ceramics
  In advanced refractories, 2202 acts as an effective antioxidant and anti‑spalling additive. Its finer particle options allow for homogeneous mixing with alumina or magnesia, forming a protective silica layer at high temperatures that resists slag attack and thermal shock. This extends the service life of crucibles, ladle linings, and kiln furniture in steelmaking and glass manufacturing.

Physical Form :
Our standard product is supplied as clean, dust‑free lumps (10–100 mm). We also offer crushed granular sizes (3–8 mm, 1–3 mm) and milled powders (100, 200, 325 mesh) for customers who require rapid dissolution or precise metering. All custom sizes are produced on dedicated lines to avoid cross‑contamination with lower grades.

Packaging:

Standard export packing is 1,000 kg net jumbo bags (FIBC) with a heat‑sealed polyethylene inner liner to block moisture and a strong outer woven polypropylene layer for tear resistance. Bags are palletised and stretch‑wrapped for container stuffing. For sample orders or special requirements, we offer 25 kg small bags, 500 kg semi‑bulk bags, or even drums upon request.

Logistics :
We ship under FOB, CIF, or CFR terms . Standard lead time is 7–8 days after order confirmation for lumps, and 7–15 days for custom sizes. We maintain safety stocks at port warehouses, enabling emergency shipments within 48 hours for popular specifications. Our freight forwarders handle all customs clearance and documentation – including Bill of Lading, Commercial Invoice, Packing List, Certificate of Origin, and any required phytosanitary or fumigation certificates.

Our quality commitment begins with hand‑picking quartzite and reductants that meet strict chemical and physical criteria. During smelting, we use real‑time online analysis to adjust furnace parameters, ensuring optimal reduction and minimal inclusion formation. After casting, the silicon undergoes primary crushing, magnetic separation to remove tramp iron, and final screening on vibrating sieves. Random samples from each shift are sent to our in‑house laboratory for ICP‑OES and LECO analysis. Only after passing all acceptance criteria do we release the batch for packaging and shipping. We retain archive samples for each lot for a minimum of two years, ensuring full traceability and facilitating any potential dispute resolution.

Q1. What is Silicon Metal 2202?

A1:Silicon Metal 2202 is a widely used industrial silicon grade containing a minimum of 99.5% silicon. The designation "2202" refers to the maximum impurity levels:Fe ≤ 0.20%,Al ≤ 0.20%andCa ≤ 0.02%.Due to its balanced chemical composition and competitive cost-performance ratio, Silicon Metal 2202 is commonly used in aluminum alloy production, silicone manufacturing, chemical processing, and metallurgical applications.

Q2. What is the difference between Silicon Metal 2202, 441, and 553?

A2:The main difference lies in impurity levels.

Silicon Metal 2202 offers lower impurity levels and better consistency, making it suitable for higher-quality applications that require stricter chemical control.

q3: Is Silicon Metal 2202 suitable for aluminum alloy production?

A3:Yes.Silicon Metal 2202 is widely used in aluminum alloy manufacturing because it improves:

• Fluidity
• Wear resistance
• Corrosion resistance
• Mechanical properties
• Casting performance

It is commonly used in automotive parts, aluminum wheels, die-casting products, aerospace components, and construction materials.

Q4: Do you offer technical support for using 2202 in new alloy formulations?
A4: Yes, our metallurgists and chemists are available for consultation on melting practices, optimal addition rates, expected mechanical property improvements, and melting loss minimisation. Just share your target alloy composition and processing conditions.

Q5: How do you ensure the product is free from foreign material contamination?
A5: We implement strict housekeeping protocols. After crushing and screening, the material passes through magnetic separators and over vibrating tables. All packaging areas are cleaned between grade changes, and we conduct visual inspections at multiple checkpoints to ensure the final product is clean.

Q6: Do you provide third-party inspection services at the loading port?
A6: Yes, we have partnered with SGS, BV, and Intertek at major ports. You can nominate your preferred agency, and we will coordinate sampling, sample preparation, and testing at your cost. The result is final and binding for shipment release.

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