Silicon Metal 3303 is a high-grade industrial silicon manufactured in accordance. The four-digit grade code represents industry standard impurity indicators: Fe ≤0.3%, Al ≤0.3%, Ca ≤0.03%, with total silicon content reaching ≥99.3%.

Compared with mainstream grades such as Si441 and Si553, it has stricter impurity control; compared with ultra-high purity 2202 silicon metal, it has a more competitive cost advantage. It is specially developed for high-end aluminum alloy anodization, organosilicon synthesis, semiconductor raw materials and high-strength castings, and is a cost-effective high-purity silicon source for mid-to-high-end manufacturing.

Silicon metal 3303

Production process

We adopt mature submerged arc furnace smelting technology with strict whole-process control to ensure stable product quality:

Raw Material Preparation: Select high-purity silica (SiO₂) and low-impurity carbonaceous reducing agents (coke, charcoal) to control raw material impurities from the source.

High-temperature Smelting: Raw materials are mixed proportionally and put into the furnace for carbothermal reduction at 1800-2000℃. The main chemical reaction: SiO₂+2C→Si+2CO↑.

Refining & Forming: The molten silicon liquid is refined to remove trace impurities, then cast into silicon ingots.

Crushing & Screening: Process ingots into lump, granule and powder products of various particle sizes according to customer requirements.

Products Description

Parameter Category	3303 Standard Range and Key Indicators	Metallurgical and Chemical Significance
Principal Component	Silicon (Si): ≥99.3%	High silicon content ensures high efficiency and economy as a silicon additive, reducing the total amount of impurities introduced during the addition process.
Core Impurity Control	Iron (Fe): ≤0.3%	Extremely low iron content is key to obtaining a smooth anodized surface and excellent corrosion resistance, avoiding the formation of black Fe-Si phase spots.
	Aluminum (Al): ≤0.3%	Stable low aluminum content helps control the grain size and final properties of aluminum alloys, reducing performance fluctuations.
	Calcium (Ca): ≤0.03%	Ultra-low calcium content is crucial for organosilicon synthesis, preventing catalyst poisoning and significantly reducing slag formation during aluminum alloy smelting.
Core Impurity Control	Lump: 10–50mm, 10–100mm	Suitable for large smelting furnaces and silicon powder processing, convenient for transportation and storage.
	Particles: 1–10mm, 0–3mm	Fast dissolution rate, suitable for medium-frequency furnaces, automated precision batching, and special alloy preparation.
	Powder: 100–200mesh,customizable upon request	Used in organosilicon synthesis, special welding materials, powder metallurgy, and other fields requiring rapid reactions or high dispersibility.

Main uses

High-end Aluminum Alloy Industry

It is the preferred raw material for anodized aluminum, automotive precision parts and aerospace aluminum materials. Low iron content effectively eliminates surface spots after anodization; it refines alloy grains, improves tensile strength, hardness and corrosion resistance of aluminum products. Widely used in auto engine parts, aerospace structural parts and architectural decorative profiles.

Organosilicon Chemical Industry

Ultra-low calcium content prevents catalyst poisoning during synthesis. It is the basic raw material for silicone oil, silicone rubber, sealants and silane products, and ensures stable reaction efficiency and finished product quality.

Semiconductor & Photovoltaic Industry

Further purified into polysilicon and monocrystalline silicon, used for solar cells, semiconductor chips and integrated circuits. Strict trace element control meets the high requirements of the electronic industry.

Steel & Casting Industry

Used as deoxidizer and alloy additive for high-strength steel and special castings. Remove internal oxygen in molten steel, reduce oxide inclusions, and improve the density and wear resistance of steel.

Silicon Metal 3303

Product advantages

Ultra-stable High Purity: Si content stably above 99.3%, with low fluctuation between batches, adapting to strict production standards of high-end industries.

Strict Impurity Control: Ultra-low Fe, Al and Ca content solves common defects such as poor anodization effect and catalyst failure.

Excellent Compatibility: Fast dissolution speed, high utilization rate, no adverse reaction with aluminum liquid, molten steel and chemical raw materials.

Cost Optimization: Balances high purity and cost, more economical than 2202 grade while meeting high-end production requirements.

Diversified Specifications: Multiple particle sizes support customized production for different furnace types and production lines.

FAQ

Q1: What is the difference between Silicon Metal 3303 and 441?

A: 3303 has lower Fe, Al and Ca content. 441 (Fe≤0.4%, Ca≤0.1%) is easy to produce surface defects for anodized aluminum. 3303 is more suitable for high-end aluminum alloy and organosilicon production.

Q2: What trace elements need attention when using 3303 for organosilicon synthesis?

A: Besides Ca, titanium (Ti) and phosphorus (P) will affect catalyst activity. We can provide complete trace element detection reports for organosilicon-grade products.

Q3: What are the key points for storing silicon metal powder?

A: Keep dry and ventilated. Silicon powder is flammable. Keep away from fire, static electricity and oxidants to avoid safety accidents.

Q4: Can you customize particle size and provide samples?

A: Yes, we support customized mesh and lump sizes. Free test samples are available, standard delivery time is 7–15 working days.

Silicon 3303