Graphite Crucible for Silver and Gold Melting
Product Overview
Our high purity graphite crucible for silver and gold melting is specifically designed for jewelry casting, precious metal refining, and laboratory melting applications. Made from isostatic pressed graphite with high density and low porosity, these crucibles offer excellent thermal conductivity, thermal shock resistance, and long service life.
Graphite crucibles are widely used in melting gold, silver, copper, aluminum, and other non-ferrous metals. Their self-lubricating properties and high temperature resistance make them ideal for small batch production, jewelry workshops, and research laboratories.
Key Features
- High Purity Graphite: 99.9% carbon content, minimal impurities
- Excellent Thermal Conductivity: Fast and uniform heating
- Thermal Shock Resistant: Withstands rapid temperature changes
- High Temperature Resistance: Up to 2800°C in inert atmosphere
- Long Service Life: Reusable for many melting cycles
- Self-Lubricating: Easy metal release, no sticking
- Custom Sizes: Various capacities available from 10g to 50kg
Technical Specifications
| Parameter | Specification |
|---|---|
| Material | Isostatic Pressed Graphite |
| Carbon Content | 99.9% |
| Density | 1.85 g/cm³ |
| Compressive Strength | 60 MPa |
| Flexural Strength | 35 MPa |
| Shore Hardness | 65-75 |
| Porosity | Less than 12% |
| Ash Content | Less than 500 ppm |
| Max Temperature | 2800°C (inert atmosphere) |
| Thermal Conductivity | 120 W/m·K |
| Available Sizes | 10g, 50g, 100g, 250g, 500g, 1kg, 5kg, 10kg |
Applications
- Jewelry Casting: Gold and silver jewelry production
- Precious Metal Refining: Gold, silver, platinum refining
- Laboratory Use: Small scale melting experiments
- Dental Applications: Dental alloy melting
- Small Batch Production: Artisanal and small manufacturing
Why Choose Jincheng Graphite Crucibles?
- 15+ years of graphite product manufacturing experience
- High purity raw materials from trusted suppliers
- Precision machining to exact dimensions
- Custom sizes and shapes available upon request
- Competitive factory direct prices
- Fast delivery: 7-15 days for standard sizes
- Exported to 30+ countries worldwide
- Quality inspection before every shipment
FAQ
Q: What is the maximum temperature for a graphite crucible?
A: Our graphite crucibles can withstand up to 2800°C in inert or reducing atmosphere. In air, the recommended maximum is around 600-800°C to prevent oxidation.
Q: How long does a graphite crucible last?
A: With proper use and care, a graphite crucible can last for 50-100+ melting cycles. Lifespan depends on melting temperature, metal type, and thermal cycling conditions.
Q: Can I get a custom size crucible?
A: Yes, we manufacture custom sizes and shapes based on your drawings or specifications. Minimum order quantity may apply for custom orders.
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