What is Graphite Plug?
Graphite plug, also known as graphite stopper plug, is a solid refractory sealing component made of high-density graphite. It is mainly used for blocking, sealing and flow cut-off of molten metal outlets in industrial furnaces, smelting crucibles and high-temperature containers. With compact structure and excellent high-temperature stability, graphite plugs are ideal sealing consumables for metal smelting and casting industries.
Key Performance Features of Graphite Plug
1. Superior High Temperature Stability
Made of high-density graphite, the graphite plug will not soften, melt or deform under continuous high temperature above 2800℃. It adapts to long-term high-temperature smelting working environment.
2. Tight Sealing & Good Closure
After precision grinding processing, the contact surface is smooth and flat with excellent fitting performance. It can perfectly block the liquid outlet to prevent molten metal leakage and ensure production safety.
3. Strong Anti-Corrosion & Anti-Adhesion
Graphite material is not wetted by molten metal such as steel, iron, copper and aluminum. The surface repels melts without adhesion, which is easy to clean and reuse moderately.
4. High Mechanical Strength & Wear Resistance
Through high-pressure compression molding, the product has high density and strong compression resistance. It can resist mechanical friction and impact during furnace opening and closing.
5. Easy Installation & Low Maintenance
Integral forming structure without internal gaps. It is simple to install, disassemble and replace. No complex maintenance is required to reduce enterprise production costs.
Main Application Scenarios
- Metallurgical Smelting Furnace: Used for outlet sealing of intermediate frequency furnaces, electric arc furnaces and smelting crucibles to control molten metal discharge.
- **Non-Ferrous Metal Casting: Applied in aluminum alloy, copper alloy and zinc alloy smelting industry for rapid flow cut-off.
- High-Temperature Reaction Vessel: Sealing and blocking for high-temperature chemical reactors to isolate gas and liquid.
- Industrial Kiln Accessories: Matched with graphite crucible and graphite mold to improve the overall sealing performance of the kiln.
Product Parameter Standard
- Carbon Purity: 99.5% - 99.9%
- Bulk Density: 1.80 g/cm³ - 1.90 g/cm³
- Hardness: 45-55 Shore hardness
- Service Temperature: Normal use at 2800℃
- Surface Treatment: Precision polishing, smooth seamless surface
- Shape: Cylindrical, circular truncated cone, customized irregular shape
Advantages of Our Graphite Plug Products
1. Raw material optimization: Adopt low-ash high-purity graphite to reduce impurities and avoid metal contamination.
2. Densification treatment: Secondary high-temperature impregnation process to enhance oxidation resistance and prolong service life.
3. Strict quality control: Each batch of products is inspected for density, hardness and flatness to ensure stable quality.
4. Global supply capability: We support bulk wholesale and small-batch trial orders, with stable stock and fast delivery.
Purchase & Custom Service
We provide one-stop graphite plug customization solutions. According to customer’s furnace caliber, pressure resistance requirement and smelting temperature, we customize exclusive size and structure.
Our graphite refractory products have been exported to Europe, Southeast Asia, the Middle East and other regions. With reliable quality and competitive factory price, we have won long-term cooperation from global industrial customers. Send us an inquiry now to get customized samples and ex-factory price.