High Purity Silicon Metal Lump
Premium Grade Silicon Metal for Aluminum Alloying, Chemical Synthesis, and Advanced Materials
Through tightly controlled submerged arc furnace (SAF) smelting and refined segregation processes, we deliver not only high silicon content, but also stable batch-to-batch consistency that supports predictable industrial performance.
In industrial procurement, technical buyers and metallurgists understand that nominal purity only tells part of the story. The real cost of raw materials is defined downstream. In high-spec aluminum casting and silicone chemical production, even small variations in trace impurities or inconsistent particle sizing can lead to furnace slagging, alloy embrittlement, or unstable reaction performance.
Technical Specifications & Standard Grades
To support accurate metallurgical and chemical formulation, we offer standardized industrial grades with strictly controlled impurity limits. Every shipment includes a certified Certificate of Analysis (COA).
|
Silicon Grade |
Si (Min %) |
Fe (Max %) |
Al (Max %) |
Ca (Max %) |
Primary Industrial Applications |
|
Grade 553 |
98.5% |
0.5% |
0.5% |
0.3% |
Automotive aluminum alloys, secondary aluminum smelting |
|
Grade 441 |
99.0% |
0.4% |
0.4% |
0.1% |
High-performance aluminum castings, silicone intermediates |
|
Grade 3303 |
99.3% |
0.3% |
0.3% |
0.03% |
Silicone polymers, silane coupling agents, specialty alloys |
|
Grade 2202 |
99.5% |
0.2% |
0.2% |
0.02% |
High-purity chemical synthesis, solar-grade feedstock |
Product Advantages of High Purity Silicon Metal Lump
Stable Batch-to-Batch Quality
Produced under controlled SAF furnace conditions, ensuring consistent silicon content and stable impurity levels across shipments. This reduces downstream adjustment costs and improves production stability.
Strict Control of Critical Impurities (Fe / Al / Ca / P / B)
Key trace elements are tightly controlled, not just overall purity:
• Fe & Al: Prevent alloy brittleness and composition drift
• Ca: Stabilizes silicone chemical reactions
• P & B: Critical for solar-grade and high-end applications
This minimizes production risk caused by hidden impurity fluctuations.
Optimized Lump Size for Furnace Efficiency
Controlled sizing (10–50 mm / 10–100 mm) ensures smooth furnace feeding, better melting efficiency, lower dust loss, and more stable continuous operation.
Low Fines Content for Higher Yield
Double screening reduces <10 mm fines, improving material utilization, reducing dust pollution, and preventing furnace charging issues such as blockage or instability.
Process-Controlled Production Stability
Quality is ensured through full-process control rather than post-sorting:
Stable quartz selection → controlled smelting → slag management → standardized crushing
This ensures long-term consistency and reliable supply performance.
Application Scenarios and Production Relevance
Aluminum Alloy Manufacturing
Silicon metal is used to improve hardness, strength, and corrosion resistance. In alloy plants, stable silicon input helps reduce rework rates and composition correction costs.
Silicone Chemical Industry
Used as the base element for silicone oils, resins, and elastomers. Here, impurity control directly affects reaction efficiency and final product stability.
Photovoltaic and Energy Materials
Used in the upstream production of polysilicon materials. Consistency in feedstock quality helps maintain efficiency in purification processes.
High-Temperature Metallurgical Processing
Its thermal stability allows it to perform reliably under extreme furnace conditions without structural degradation.
Manufacturing & Batch Traceability
We operate under an ISO 9001:2015 certified quality management system. Our product stability is achieved through process control rather than post-production sorting.
Quartz source control: Raw quartz with SiO₂ ≥ 99.5% and consistently low boron and phosphorus levels.
SAF smelting control: Computer-monitored submerged arc furnaces ensure stable thermal distribution and consistent reduction efficiency.
Full batch traceability: Each batch is assigned a unique ID linked to furnace data, raw material lot, and X-ray fluorescence (XRF) test records.
This system ensures every shipment can be traced back to its exact production conditions.
Physical Sizing Optimized for Furnace Efficiency
Material handling plays a direct role in energy efficiency and melting stability.
Standard sizes: 10–50 mm or 10–100 mm (minimum 90% within range).
Strict fines control: <10 mm fines kept at a minimum level to improve furnace permeability and reduce charging losses.
Mechanical durability: Improved structural integrity to reduce breakage during transportation and bulk handling.
This controlled sizing helps stabilize furnace feed behavior and improves overall melting efficiency.
Certificate
Packaging & Export Logistics
Standard packaging: 1,000 kg (1 MT) UV-resistant jumbo bags with moisture-proof sealing.
Storage conditions: Covered and controlled warehouse environments to prevent oxidation and moisture absorption.
Export documentation: Full set of shipping documents including Bill of Lading, Packing List, COA/COM, and compliance documents (including REACH where applicable).
FAQ
Q: How do you ensure the COA matches the actual material delivered?
A: We apply a dual-sampling system based on ISO 3082 standards. Samples are collected both during tapping and final packaging. Each batch is analyzed using calibrated XRF and ICP-OES equipment. Third-party inspections (SGS, BV, etc.) are supported before shipment.
Q: Can you supply low Ti or low P silicon metal?
A: Yes. For applications such as polysilicon feedstock or high-end silicone synthesis, we can source and process low-boron, low-phosphorus, and low-titanium quartz materials. Please provide your target specifications for technical evaluation.
Q: What level of fines should we expect upon delivery?
A: Under standard loading conditions, fines below 10 mm are controlled within 5% at the time of shipment. Double screening and controlled crushing are applied before packaging. Minor variation may occur during long-distance transport depending on handling conditions.
Q: Is your silicon suitable for continuous feeding furnace systems?
A: Yes. Our 10–50 mm and 10–100 mm grades are designed for stable feeding behavior, ensuring consistent gas permeability and melting flow. Controlled particle distribution reduces bridging and improves furnace stability.
Q: Do you support long-term supply agreements?
A: Yes. We offer annual and quarterly framework contracts with scheduled monthly deliveries to ensure stable supply continuity and reduce procurement risk.
Q: Is your product compliant with EU REACH requirements?
A: Yes. Our silicon metal complies with applicable international regulatory standards, including EU REACH. We provide SDS and compliance documentation for customs clearance and audit requirements.
Q: Request a Sample & Technical Consultation
A: If you would like to validate consistency in your own laboratory or production environment, you can request sample material, historical COA data, or a commercial quotation from our technical sales team.
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