Silicon Metal for Deoxidization - Product Introduction
Deoxidization is a critical step in steelmaking that removes dissolved oxygen from molten metal before solidification. Silicon metal is one of the most widely used deoxidizers due to its high affinity for oxygen, cost efficiency, and ability to simultaneously improve steel mechanical properties. When silicon is introduced into liquid steel, it forms silicon dioxide (SiO₂) which floats into the slag layer, leaving behind cleaner, more homogeneous steel. Beyond deoxidation, silicon enhances strength, hardness, and elasticity, making it indispensable in structural, automotive, and machinery steels.
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Core Selling Points
- High oxygen affinity ensures rapid and complete deoxidation in molten steel.
- Simultaneously improves tensile strength, yield strength, and elastic modulus.
- Compatible with BOF, EAF, induction furnace, and ladle metallurgy processes.
- Available in lump, granule, and powder forms to match various charging methods.
- Thirty years of supply experience with documented batch traceability.
Technical Specifications & Grades
The following table shows typical chemical composition ranges for common grades. Exact inventory and latest batch certificates are available on request.
|
Trademark |
ZhenAn |
|
Product |
Silicon Metal |
|
Grade |
553 / 441 / 3303 / 2202 / 1101 |
|
Color |
Silver Gray |
|
Shape |
Lump |
|
Transport Package |
Packed in Ton Bag |
|
MOQ |
Negotiable |
The grades listed above are the most commonly stocked for deoxidation applications. 553 and 441 are typically used in general steelmaking, while 3303, 2202, and 1101 serve specialty alloys and chemical routes where lower impurities are required. Confirm current inventory before ordering.
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Applications & Industries
Primary Steelmaking Deoxidation: In basic oxygen furnaces (BOF) and electric arc furnaces (EAF), silicon is added during tapping or in the ladle to bring dissolved oxygen down to acceptable levels. This prevents blowholes, porosity, and oxide inclusions in cast slabs and billets.
Secondary Refining & Ladle Metallurgy: In ladle furnaces and vacuum degassing stations, precise silicon additions fine-tune the final chemistry of alloy steels. Silicon also acts as a reducing agent for slag oxides, improving metal recovery and reducing refractory erosion.
Foundry Cast Iron Inoculation: Although primarily a deoxidizer in steel, silicon also serves as an inoculant in gray and ductile iron foundries. It promotes graphite formation, improves machinability, and reduces chill depth in thin-section castings.
Non-Ferrous Metal Refining: Silicon deoxidizes copper, nickel, and cobalt alloys during vacuum induction melting, preventing oxide stringers that would otherwise degrade fatigue life in aerospace and power-generation components.
Product Delivery, Packaging & Logistics
Forms: Crystalline lumps (10–100mm standard), crushed granules (3–10mm, 1–3mm), and fine powder (0–1mm) for pneumatic injection. Lump form is most common for EAF and BOF tapping additions; powder is used in cored-wire or lance-injection systems.
Packaging: 1-ton jumbo bags with moisture barrier (standard). Smaller 25 kg bags or steel drums are available for sample orders or specialized handling. All export packaging includes bilingual labeling and net-weight certification.
Shipping & Documentation: FOB Chinese ports, CIF global destinations, or DAP inland warehouses. We provide commercial invoices, packing lists, certificates of origin, and mill test certificates. Lead time is typically 10 days after deposit confirmation.
Frequently Asked Questions
- Q: How much silicon metal is typically needed per ton of steel?
- A: The addition rate depends on the initial oxygen level, target silicon content, and steel grade. Typical deoxidizer additions range from 2–8 kg per ton of liquid steel. Our technical team can calculate an optimized addition rate based on your melt analysis.
- Q: Can silicon metal replace aluminum as a deoxidizer?
- A: Silicon and aluminum are often used together. Aluminum provides stronger initial deoxidation, while silicon offers a more economical finish and contributes to solid-solution strengthening. Many steelmakers use a combined Al-Si deoxidation strategy.
- Q: What grades are best for plain carbon steel deoxidation?
- A: For general carbon steel, 553 or 441 are typically sufficient and cost-effective. For higher-quality grades requiring tighter chemistry, 3303 or 2202 are recommended.
- Q: Do you provide technical support for lance-injection parameters?
- A: Yes. We can advise on injection depth, carrier-gas flow rates, and feed speeds for powder and cored-wire systems to maximize silicon recovery and minimize fume generation.
Contact ZhenAn International Today
WhatsApp: +86 15518824805
Email: market@zanewmetal.com
ZhenAn International Co., Limited - 30 Years of Ferroalloy Experience | Website: www.metal-alloy.com
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