E-Mail:kb@czgraphite.com
Tel:+86 15533739372
The main products of graphite products for non-ferrous metal industry include: graphite melting crucible, graphite casting crucible, graphite plug rod, graphite oil bath, graphite continuous casting mold, graphite crystallizer, graphite boat, graphite melting pot for welding, graphite rotor for degassing in aluminum industry and so on.
Home Products Non-ferrous Metals Industry / Graphite Stopper
Our Graphite Stopper is precision-machined from high-quality isostatic graphite with a bulk density of 1.9 g/cm³, delivering exceptional performance as a flow control component in precious metal melting and casting processes. Engineered to work with graphite casting crucibles, this stopper offers outstanding thermal stability, chemical inertness, and mechanical strength – ensuring the purity of your molten gold, silver, and platinum is never compromised.
Superior Purity – Zero Metal Contamination: Manufactured from high-purity isostatic graphite with low ash content, our stopper rod ensures that molten precious metals remain free from impurities during the entire melting and casting cycle.
Precise Flow Regulation: The stopper is designed to accurately block the pour spout or orifice of the crucible, giving full control over the outflow rate of liquid metal.
High-Density 1.9 g/cm³ Isostatic Graphite: The 1.9 density isostatic graphite offers superior mechanical strength, fine grain structure, and excellent oxidation resistance compared to conventional graphite materials. This results in a stopper that maintains its shape and dimensional accuracy even after repeated high-temperature cycles, providing longer service life and consistent performance.
Exceptional Thermal Shock & Heat Resistance: Capable of withstanding extreme temperatures up to 2000°C (3632°F), our stopper rod resists cracking, spalling, and deformation during rapid heating and cooling. The isostatic pressing process ensures uniform material properties in all directions, delivering reliable performance in demanding induction melting furnaces.
Chemical Corrosion Resistance: The 1.9 density graphite exhibits strong resistance to chemical attack from molten metals and common fluxes used in jewelry and foundry applications, further extending the lifespan of the rod.
Durable & Cost-Effective: With its dense structure and high mechanical strength, this stopper rod offers significantly reduced wear rates, minimizing downtime for replacements and improving overall production efficiency.
Melting and casting of Gold, Silver, Platinum, and other precious metals
Jewelry manufacturing and refining
Flow control in vacuum pressure casting machines
Metal smelting in induction and electric resistance furnaces
Available Grades:
Isostatic Graphite (Density ≥ 1.9 g/cm³)
Fine-Grain Graphite (customized upon request)
We support OEM customization. Dimensions, taper angles, tip shapes, and specific material grades can be tailored to meet your furnace specifications. Contact us for your custom solution!
