High Quality Lump Silicon Metal

Product Introduction

High-quality lump silicon metal is the standard physical form used in metallurgical and chemical industries worldwide. Supplied as irregular crystalline chunks ranging from 10 mm to 150 mm, lump silicon metal offers low surface-area-to-volume ratio, minimal oxidation during storage, and straightforward furnace charging in aluminum smelters and steel foundries.

Our lump silicon metal is produced through carbothermic reduction of high-purity quartz in submerged electric arc furnaces, followed by careful casting, cooling, and sizing. Each batch is analyzed for silicon content and key impurities (Fe, Al, Ca, P) to ensure it meets the chemical specifications of your process.

Contact ZhenAn International Co., Limited
WhatsApp: +86 15518824805
Email: market@zanewmetal.com
ZhenAn International Co., Limited - 30 Years of Ferroalloy Experience | Website: www.metal-alloy.com

Core Selling Points

• Low Surface Oxidation: Lump form minimizes surface area, reducing oxide formation during storage and transport.
• Rapid Furnace Dissolution: Optimal size distribution ensures quick melting and uniform dissolution in molten aluminum and steel baths.
• Consistent Chemistry: Tight control of Fe, Al, and Ca guarantees predictable alloy behavior and minimal dross generation.
• Multiple Grade Availability: Stock includes 441, 553, 3303, and other standard grades with certificates of analysis.
• Bulk Export Ready: 1-ton bulk bags or containerized loose bulk for large-scale industrial consumers.
• Decades of Expertise: ZhenAn International Co., Limited has supplied lump silicon metal to foundries and alloy plants across Asia, Europe, and the Americas.

Technical Parameters

Standard chemical compositions for high-quality lump silicon metal. Actual values should be confirmed against the CoA for each shipment.

Note: Silicon metal 441 and 553 are the most commonly requested lump grades for aluminum alloying. Higher grades (3303, 2202, 1101) are typically used in chemical and specialty applications.

Contact ZhenAn International Co., Limited
WhatsApp: +86 15518824805
Email: market@zanewmetal.com
ZhenAn International Co., Limited - 30 Years of Ferroalloy Experience | Website: www.metal-alloy.com

Application Scenarios

Aluminum Alloy Production: Lump silicon metal is added directly to molten aluminum in reverberatory or rotary furnaces. The silicon dissolves rapidly, forming aluminum-silicon eutectic or hypoeutectic alloys used in automotive castings, engine components, and architectural extrusions. Lump form is preferred over powder in large furnaces to minimize dusting and improve operator safety.

Steel Deoxidation and Alloying: In electric arc furnaces and ladle metallurgy stations, lump silicon metal serves as a powerful deoxidizer. It removes dissolved oxygen from liquid steel, forming silica-rich slag while improving steel cleanliness. Silicon also enhances the strength and elasticity of spring steels and electrical steels.

Chemical Industry Feedstock: Metallurgical-grade lump silicon is chlorinated to produce silicon tetrachloride (SiCl₄) and trichlorosilane (SiHCl₃), key intermediates in silicone polymer and fumed silica production. The lump form ensures controlled feed rates in fluidized bed chlorinators.

Foundry Inoculation: In cast iron foundries, small lumps or granules of ferrosilicon or silicon metal are added to molten iron just before pouring. This inoculation promotes graphite nucleation, improving casting machinability and reducing chill depth in thin sections.

Solar-Grade Silicon Precursor: While metallurgical-grade lump silicon cannot be used directly in solar cells, it serves as the feedstock for purification processes (Siemens process, metallurgical route) that ultimately yield solar-grade polysilicon.

Product Delivery

Physical Form: Dark grey metallic lumps with angular fracture surfaces. Low fines content (<5% below 10 mm) as standard.

Packaging: 1,000 kg flexible intermediate bulk containers (FIBC) with polyethylene liner; 25 kg or 50 kg polypropylene sacks on shrink-wrapped pallets. Moisture barrier packaging prevents surface oxidation during ocean transit.

Labeling & Documentation: Each bag or container is labeled with grade, net weight, batch number, and production date. CoA, MSDS, and packing list accompany every shipment.

Transportation: Bulk break-bulk or containerized shipment. Standard 20-foot containers hold approximately 25–27 metric tons. We handle export clearance, customs documentation, and marine insurance upon request.

Frequently Asked Questions

What is the difference between lump and powder silicon metal?

Lump silicon metal is the as-cast form, suitable for furnace charging and bulk chemical processes. Powder silicon metal is milled from lumps for applications requiring rapid dissolution, precise dosing, or sintering. We supply both forms.

How should lump silicon metal be stored?

Store in a dry, covered warehouse on pallets to prevent ground moisture absorption. While silicon metal is relatively stable, prolonged exposure to humid conditions can form a thin surface oxide film that increases slag generation during melting.

Can I order a specific lump size distribution?

Yes. We can supply coarse lumps (50–150 mm), standard lumps (10–100 mm), or fines-controlled mixtures. Specify your preferred size range and maximum allowable fines content when requesting a quote.

Which grade is best for my aluminum foundry?

Most aluminum foundries use 441 or 553 grade. If you produce high-performance alloys or require tighter impurity control, 3303 may be appropriate. Our technical team can recommend a grade based on your alloy specifications and furnace type.

How do I get pricing and place an order?

Send your inquiry via WhatsApp or email with target grade, quantity, size specification, and destination port. We will confirm availability and issue a firm offer within one business day.

Order Premium Lump Silicon Metal from ZhenAn

Reliable chemistry, consistent sizing, and professional logistics make ZhenAn International Co., Limited a trusted partner for lump silicon metal procurement. Contact us today for a competitive quotation tailored to your production schedule.