Silicon Metal Lumps
Silicon Metal Lumps Manufacturer & Supplier
High-Purity Metallurgical & Chemical Grade Silicon For Global Industrial Applications
We are a direct-factory manufacturer and global exporter of Silicon Metal Lumps. Offering strict chemical composition control, consistent batch-to-batch mineralogical stability, and fully traceable supply chains for aluminum alloying, silicone chemistry, and advanced materials industries.
Purity Range
98.5% – 99.99% Min Si (Covering 553, 441, 3303, 2202, 1101 Grades).
Capacity Assurance
5,000 MT Monthly Output | ISO 9001:2015 Certified System.
Quality Guarantee
100% ICP-OES Tested & SGS / Bureau Veritas Verifiable.
Logistics Advantage
Direct Port Loading & Moisture-Controlled Transit Packaging.
Industrial Definition & Metallurgical Characteristics
Silicon Metal Lumps (also referred to as crystalline silicon or industrial silicon) are produced via the pyrometallurgical reduction of high-purity quartz (SiO₂) using carbon-based reducing agents in a submerged electric arc furnace (SAF).
Compared to silicon powder or pre-melted ingots, lump-form silicon provides key process advantages for metallurgical and chemical applications:
Optimized Melt Kinetics
Controlled lump sizing prevents premature surface oxidation and ensures stable dissolution rates in aluminum melt baths.
Minimized Material Loss
Reduces draft-loss and baghouse dust emissions compared to fine powders.
Superior Thermal Permeability
Enhances gas permeability in downstream chemical reactors (Müller-Rochow Direct Process).
TECHNICAL SPECIFICATIONS & INDUSTRY GRADES
|
Grade |
Si Min % |
Fe Max % |
Al Max % |
Ca Max % |
Application |
|
553 |
98.5% |
0.5% |
0.5% |
0.3% |
Primary & Secondary Aluminum Alloys |
|
441 |
99.0% |
0.4% |
0.4% |
0.1% |
Automotive-Grade Alloys |
|
3303 |
99.3% |
0.3% |
0.3% |
0.03% |
Silicone & Special Chemistry |
|
2202 |
99.5% |
0.2% |
0.2% |
0.02% |
High-Strength Alloys & Silanes |
|
1101 / High Purity |
99.9% – 99.99% |
≤0.1% |
≤0.1% |
≤0.01% |
Solar & Electronics Feedstock |
Trace Impurity Control (ICP-OES Verified)
|
Phosphorus (P) |
≤ 50 ppm |
|
Boron (B) |
≤ 30 ppm |
|
Carbon (C) |
≤ 0.04% |
TARGET INDUSTRIAL APPLICATIONS
Aluminum Alloy Manufacturing
Used as a key alloying element in Al-Si series alloys (3XX.X automotive castings), improving fluidity, wear resistance, and reducing hot tearing.
Silicone & Organosilicon Synthesis
Raw material for methylchlorosilanes, siloxanes, and silicone rubbers. Requires strict impurity control to avoid catalyst poisoning.
Steel Deoxidization & Special Metallurgy
Applied in stainless steel, HSLA steel, and non-ferrous alloy production as a reducing agent.
Electronic & Solar Photovoltaic Feedstock
High-purity grades (99.99%) used as upstream material for polysilicon and trichlorosilane (TCS).
MANUFACTURING PROCESS & EEAT ASSURANCE
Our smelting facility utilizes advanced automation to guarantee mineralogical stability. Every step is logged within our internal quality tracking system:
[High-Purity Quartz Selection] → [Carbon Reductant Blending] → [Submerged Arc Furnace Smelting]
[Refining & Slag Pouring] → [Crushing & Sizing Screen] → [ICP-OES Spectrometry Check] → [Moisture-Proof Packaging] → [Batch Number Coding]
Core Process Controls
• Raw Material Selection: Quartz with $SiO_2 > 99.5%$ to prevent contamination
• Refining Process: Oxygen and directional gas blowing to remove Ca and Al impurities
• Batch Traceability: Each production run has a unique Heat Number linked to furnace logs
ACCREDITATION & QUALITY CONTROL
We operate an ISO 9001:2015 registered laboratory for full elemental and mechanical testing.
Pre-Shipment Inspection (PSI) Protocol
Chemical Analysis: ICP-OES per 20-ton sub-batch
Sieve Analysis: Particle size distribution verification
Documentation: Certificate of Analysis (COA) + MSDS for every shipment
Third-Party Inspection Support
SGS, Bureau Veritas (BV), and Cotecna inspections are supported prior to shipment upon buyer request.
PACKAGING, SIZING & LOGISTICS
Sizing Specifications
Standard: 10–50 mm / 10–100 mm / 50–100 mm
Custom sizing available upon request
Industrial Packaging
1,000 kg / 1,250 kg Jumbo Bags (PP + PE liner)
Moisture-proof export packaging
Freight Optimization
20’ FCL: 25–27 MT loading capacity
Seaworthy protection: Pallets, strapping, shrink wrap
Moisture control: Desiccants included
GLOBAL SUPPLY CAPACITY
We provide stable long-term supply to protect industrial buyers from market volatility.
Lead Time
7–14 days FOB
Main Ports
Tianjin / Qingdao / Shanghai
Markets
Europe, USA, Middle East, Southeast Asia
Compliance
REACH / RoHS supported
FAQ
RFQ
Get Technical & Commercial Proposal Within 24 Hours
Please provide:
Required Grade / Si %
Target Size (e.g. 10–50mm)
Quantity (MT)
Destination Port / Country
Application