Product Description of metal silicon
Silicon Metal is a refined metallurgical material produced through the carbothermic reduction of high-purity quartz (SiO₂) in electric arc furnaces. It serves as a key raw material for aluminum alloy production, chemical silicone manufacturing, and advanced industrial applications.
Because of its high silicon content and controlled impurity levels, silicon metal plays an essential role in improving mechanical strength, corrosion resistance, and thermal stability in downstream products.
What Is Silicon Metal?
Silicon metal is a semi-metallic element material with silicon content typically ranging from 98% to 99.9%, depending on grade. It is produced by reducing quartz with carbon sources such as coke, coal, and wood chips at high temperatures above 2000°C.
The resulting product is a hard, brittle material with metallic luster, widely used in metallurgy and chemical industries.
How Is Silicon Metal Produced?
The production of silicon metal involves high-temperature carbothermic reduction in submerged arc furnaces:
- Selection of high-purity quartz ore
- Addition of carbon reductants (coke, coal, wood chips)
- Smelting in submerged arc furnace
- Reduction of SiO₂ into molten silicon
- Refining and impurity control
- Cooling, crushing, and grading into specific sizes
The purity of raw materials directly determines the final grade quality of silicon metal.
Silicon Metal Grade Classification
| Grade | Si Content (%) | Main Impurities | Main Application |
|---|---|---|---|
| 553 | ≥98.5 | Fe, Al, Ca | Basic aluminum alloy |
| 441 | ≥99.0 | Lower impurity level | High-quality aluminum alloys |
| 3303 | ≥99.3 | Controlled Fe/Al | Chemical silicone production |
| 2202 | ≥99.5 | Very low impurities | Advanced chemical & alloy use |
| 1101 | ≥99.7 | Ultra-low impurities | High-end chemical & electronics |
Technical Properties of Silicon Metal
| Property | Description |
|---|---|
| Appearance | Gray metallic lump or crystalline solid |
| Melting Point | 1414°C |
| Density | 2.33 g/cm³ |
| Purity Range | 98%–99.9% |
| Reactivity | Stable at room temperature, reactive at high temperature |
Main Industrial Applications
Aluminum Alloy Industry
Silicon metal is used to improve fluidity, strength, and corrosion resistance of aluminum alloys.
Chemical Industry
Used as a raw material for silicone products such as resins, oils, rubbers, and sealants.
Metallurgical Industry
Acts as an alloying agent and deoxidizer in steel and non-ferrous metal production.
Electronics Industry
High-purity silicon is used in semiconductor and photovoltaic applications.
Silicon Metal in Aluminum Alloy Production
One of the largest applications of silicon metal is in aluminum alloy manufacturing.
It enhances casting performance, reduces shrinkage defects, and improves mechanical strength of aluminum products used in automotive, aerospace, and construction industries.
Silicon Metal in Chemical Industry
Silicon metal is a primary raw material for producing organosilicon compounds.
These include silicone oils, resins, and elastomers widely used in electronics, construction, medical devices, and industrial sealing materials.
Silicon Metal vs Ferrosilicon
| Item | Silicon Metal | Ferrosilicon |
|---|---|---|
| Composition | High purity Si | Si + Fe alloy |
| Purity | 98%–99.9% | ~70%–75% Si |
| Main Use | Chemical & aluminum industry | Steel deoxidation |
| Processing | Higher refinement | Smelting alloy |
Silicon Metal vs Silicon Carbide
| Item | Silicon Metal | Silicon Carbide |
|---|---|---|
| Chemical Type | Elemental Si | Compound (SiC) |
| Main Function | Alloying & chemical raw material | Abrasive & refractory material |
| Industry | Aluminum & chemical industry | Refractory & grinding tools |
Procurement Guidelines
When purchasing silicon metal, buyers should consider:
- Required grade (553, 441, 3303, 2202, 1101)
- Purity and impurity limits
- Particle size specification
- Application field (aluminum, chemical, electronics)
- Supplier quality certification (COA, ISO)
- Consistency of production batches
Stable quality is more important than price in long-term industrial applications.
Market Importance
Silicon metal is a foundational material in modern metallurgy and chemical industries.
Its demand continues to grow due to expansion in aluminum alloys, silicone products, and renewable energy technologies.
Frequently Asked Questions (FAQ)
What is silicon metal used for?
It is used in aluminum alloys, chemical silicone production, and metallurgical applications.
What are silicon metal grades?
Common grades include 553, 441, 3303, 2202, and 1101.
Is silicon metal the same as ferrosilicon?
No. Silicon metal is high purity elemental silicon, while ferrosilicon is an iron-silicon alloy.
What industries use silicon metal?
Aluminum, chemical, metallurgy, and electronics industries.
Why is silicon metal important in aluminum production?
It improves strength, fluidity, and corrosion resistance of aluminum alloys.
What is the purity of silicon metal?
It ranges from 98% to 99.9% depending on grade.
How is silicon metal produced?
By reducing quartz with carbon in submerged arc furnaces at high temperature.
Is silicon metal used in electronics?
Yes, high-purity silicon is used in semiconductors and solar panels.
What is the main raw material?
High-purity quartz (SiO₂).
How to get pricing?
Provide grade, quantity, and destination for quotation.
Contact Information
ZhenAn International
Email: market@zanewmetal.com
WhatsApp: +86 15518824805
Global Supplier of Silicon Metal for Metallurgy and Chemical Industry