Silicon Metal Granules

Industrial Silicon Metal Granules Factory | Flow Particles for Al-Si Alloys Casting

We are a direct industrial manufacturer specializing in the precision crushing, magnetic separation, and screening of high-purity Silicon Metal Granules. Our processing lines are engineered specifically to eliminate handling loss, prevent hopper bridging, and optimize dosing accuracy in fully automated continuous feeding lines.

Available Grades

Standard metallurgical and chemical specs (Equivalent to 553, 441, 3303, 2202 localized sizing).

Physical Engineering

Tailored Bulk Density ($1.2 - 1.4\ g/cm^3$) and controlled particle size distribution (PSD).

Production Capacity

3,500 MT Monthly Crushing & Screening Output.

Compliance Protocol

Full ISO 9001:2015 registration, REACH compliant, and third-party certified (SGS / Bureau Veritas).

Advantage of Silicon Metal Granules

Eliminating Automated Feeding Jams: Uneven lumps cause bridging and ratholing in automated day-bins. Our flow-optimized granules ensure continuous, uninterrupted gravimetric or volumetric dosing.

Drastic Reduction in Material Yield Loss: Manual crushing of lumps on foundry floors generates up to 5% – 8% fine dust waste. Granules arrive pre-sized, driving mineral recovery rates close to 98%.

Homogeneous Melting Kinetics: Large lumps cause local temperature drops and uneven dissolution paths in melt baths. Granules provide a high surface-area-to-volume ratio, ensuring rapid, uniform alloy integration.

Mitigating EAF & Ladle Dust Emissions: Fine silicon dust is a severe health hazard and clogs plant baghouse filters. Our multi-stage dust extraction process ensures minimal fines (< 0.5% under-size).

Lower rejection rates in aluminum casting: Inconsistent silicon dissolution can lead to hard spots or micro-segregation in structural castings (such as automotive wheels). Precision granules ensure stable and predictable silicon (Si) recovery in every batch, supporting consistent metallurgical performance.

TECHNICAL SPECIFICATIONS & MATERIAL GRADES

Grade Standard	Silicon (Si) Min %	Iron (Fe) Max %	Aluminum (Al) Max %	Calcium (Ca) Max %	Typical Industrial Use-Case
Granular 553	98.5%	0.5%	0.5%	0.3%	Secondary Al-Si Alloys (ADC12, LM24)
Granular 441	99.0%	0.4%	0.4%	0.1%	Structural Auto Components (A356, A380)
Granular 3303	99.3%	0.3%	0.3%	0.03%	Special Metallurgy & Steel Deoxidation
High-Purity Chemical	99.5% - 99.9%	≤ 0.15%	≤ 0.15%	≤ 0.02%	Silicone Monomers & Organosilicon Feedstock

Controlled Physical Parameters

Bulk Density	1.20 – 1.45 g/cm³ (depending on particle size distribution)
Angle of Repose	≤ 35° (optimized for stable silo discharge and excellent flowability)
Trace Contamination	Free from slag inclusions, visible moisture, and foreign organic matter

Precision Particle Size Distribution

We operate high-frequency vibrating screening systems to separate highly precise particle fractions:

Micro-Granules: 1–3 mm / 1–5 mm (ideal for rapid reaction in ladle deoxidation processes)

Standard Granules: 2–8 mm / 3–10 mm (optimized for chemical fluidized-bed reactors and aluminum dosing applications)

Coarse Granules: 10–30 mm (designed for coreless induction furnace charging)

Custom particle size distribution curves can be tailored to match specific mesh requirements and plant process conditions.

INDUSTRIAL APPLICATION MATRIX

Automotive & Primary Aluminum Alloys

Granules are fed directly into holding furnaces or inline rotor degassing systems to precisely adjust silicon content in structural alloys. This ensures tight compliance with international standards like EN BD102 or ASTM B179.

Ladle Steel Refining & Deoxidation

In steelmaking, granulated silicon serves as a powerful deoxidizing agent in liquid steel. Its predictable sizing allows steelmakers to hit narrow carbon/silicon specification windows in the Ladle Furnace (LF) without introducing unexpected slag variance.

Organosilicon & Silicone Syntheses

Used in fluid-bed reactors via the Direct Synthesis method to produce methyl chlorosilanes. The uniform granule size maintains ideal fluidization velocity, avoiding bed channelization while maximizing chemical yield.

PROCESS ARCHITECTURE & QUALITY GATEKEEPING

How We Ensure Batch-to-Batch Replicability:

[Metallurgical Base Ingot Verification] ➔ [Primary Low-Friction Jaw Crushing] ➔ [Multi-Deck Vibrating Screening] ➔ [Dual-Stage High-Intensity Magnetic Separation] ➔ [ICP-OES Sampling] ➔[Integrated Sealed Packaging]

Critical Quality Control Points

Ingot Sourcing Vetting: We do not use scrap or uncontrolled floor-drippings. Our input feed consists exclusively of certified primary silicon blocks.
Advanced Magnetic Separation: Industrial crushing inevitably introduces trace iron wear particles. We pass all granules through a 12,000 Gauss dual-stage rare-earth magnetic separator to strip out mechanical $Fe$ contamination.
Sieve Integrity Audits: Screen mesh wear is checked every 8 operating hours via laser diffraction particle size analysis to prevent oversized or undersized leaks.

LOGISTICS & PACKAGING

Standard Export Units
1,000 kg or 1,250 kg UN-Rated Heavy-Duty Jumbo Bags (Polypropylene, UV-stabilized, with cross-corner loops and a bottom discharge spout).
All jumbo bags include a 100-micron internal PE liner hermetically sealed to block moisture ingress.
25 kg multi-wall paper/plastic bags stacked, strapped, and shrink-wrapped on ISPM-15 heat-treated fumigated wooden pallets.

Container Optimization
Standard 20GP container loading maxed out safely at 25 to 27 Metric Tons with protective floor cardboard and desiccant poles.

FAQ

Q: What is your typical specification tolerance between shipments?

A: For our primary contract grades (e.g., 441), we maintain strict batch-to-batch consistency, with silicon content variation controlled within ±0.2% and iron impurity variation within ±0.04% across different production and shipping lots.

Q: How does your facility handle under-size fines management?

A: Our final packaging lines feature integrated dust aspiration hoods. We guarantee that under-size fines (particles smaller than the specified lower limit, e.g., <1mm) do not exceed 0.5% by weight at the time of ex-factory loading.

Q: Can you comply with strict third-party pre-shipment inspections?

A: Yes. We regularly coordinate with SGS, Bureau Veritas (BV), and Intertek. Sampling can be performed directly from our factory warehouses or at the designated port of departure.

Q: Do you offer long-term fixed-price supply agreements?

A: For qualified global B2B buyers with stable monthly volumes (minimum 100 MT/month), we offer 6-month to 12-month rolling framework contracts with flexible pricing formulas indexed to global metal bulletins or stable fixed-price mechanisms.

COMMERCIAL RFQ PROFILE

To enable our technical engineering department to issue an actionable commercial proposal and allocate production capacity, please specify your parameters:

Target Chemical Grade or Max Impurities

(E.g., Si 99.0% Min, Fe 0.4% Max)

Required Particle Size Distribution Scope

(E.g., 2–6 mm, 3–10 mm)

Monthly / Annual Tonnage Commitment

(Metric Tons)

Incoterms & Destination Port

(E.g., CIF Rotterdam, FOB Tianjin, CFR Santos)

Unloading Automation Infrastructure

(E.g., Silo pneumatic feed, Hopper gravimetric dump)

We're well-known as one of the leading silicon metal granules manufacturers and suppliers in China. If you're going to buy cheap silicon metal granules in stock, welcome to get quotation and free sample from our factory. For price consultation, contact us.