Overview of Corundum Crucible

Corundum crucibles, made from alumina (Al₂O₃), are highly valued for their exceptional thermal resistance and chemical stability. These crucibles are ideal for high-temperature applications, such as melting and annealing processes in laboratories and industrial settings. Corundum crucibles can withstand temperatures up to 1800°C and are resistant to most chemical reagents, making them indispensable in various scientific and manufacturing operations.

Features of Corundum Crucible

High Thermal Resistance: Can withstand temperatures up to 1800°C without degrading.

Chemical Stability: Resistant to most acids and alkalis, ensuring minimal contamination during experiments or production.

Durability: Extremely durable and long-lasting, even under harsh conditions.

Non-Reactive: Does not react with the materials being processed, preserving sample purity.

Versatility: Suitable for a wide range of applications including melting metals, glass, and ceramics.

Precision Engineering: Manufactured to tight tolerances for consistent performance and reliability.

(High Purity Melting Graphite crucible For Gold Smelting)

Specification of High Purity Melting Graphite crucible For Gold Smelting

High Purity Melting Graphite Crucible for Gold Smelting is engineered to meet the rigorous demands of precious metal processing, offering exceptional thermal stability, durability, and resistance to thermal shock. Crafted from premium-grade synthetic graphite, this crucible ensures minimal contamination during high-temperature operations, making it ideal for gold, silver, and other non-ferrous metal smelting.

Material Composition: The crucible is made from 99.9% high-purity synthetic graphite, ensuring low ash content (≤0.05%) and no chemical reactions with molten metals. This guarantees the integrity and purity of melted gold.

Temperature Resistance: Withstands extreme temperatures up to 3000°C in inert environments and 500-800°C in oxidizing conditions, suitable for both induction and electric furnace applications.

Physical Specifications: Available in multiple sizes (e.g., 50mm to 300mm inner diameter) with capacities ranging from 100g to 5kg of gold. Wall thickness varies between 5mm and 20mm, optimized for heat distribution and structural integrity.

Thermal Conductivity: High thermal conductivity (80-120 W/m·K) ensures rapid, uniform heating and energy efficiency. The low thermal expansion coefficient (4-6×10⁻⁶/°C) minimizes cracking during rapid temperature changes.

Density & Durability: Bulk density ranges from 1.6-1.8 g/cm³, enhancing resistance to oxidation and erosion. The crucible’s fine-grained structure provides a smooth inner surface, reducing metal adherence and simplifying post-use cleanup.

Chemical Resistance: Inert to most acids, alkalis, and molten metals, ensuring longevity even under repetitive use.

Applications: Designed for goldsmiths, jewelers, and refineries, it is compatible with induction melting, vacuum casting, and investment casting processes. Suitable for gold, silver, platinum, and their alloys.

Lifespan: 20-50 uses under standard operating conditions, depending on temperature cycles and handling.

Safety & Handling: Pre-heat gradually to 200°C before full-load operation to prevent thermal shock. Avoid direct contact with flames in oxidizing environments.

Packaging: Individually wrapped in anti-static foam and shipped in reinforced cardboard boxes to prevent transit damage.

This crucible combines precision engineering with high-purity materials, delivering reliability for critical smelting tasks while maintaining cost-effectiveness over its extended service life.

(High Purity Melting Graphite crucible For Gold Smelting)

Applications of High Purity Melting Graphite crucible For Gold Smelting

High purity melting graphite crucibles are essential tools in gold smelting and related industries, offering unmatched performance in high-temperature applications. These crucibles are crafted from premium-grade synthetic graphite, ensuring minimal impurities and exceptional thermal properties. Their primary use lies in melting, alloying, and refining gold, where maintaining the metal’s purity is critical. The ultra-high purity composition (typically 99.9% carbon content) prevents contamination, preserving gold’s intrinsic value and quality during repeated heating cycles.

One key application is gold smelting, where the crucible’s superior thermal conductivity ensures rapid, uniform heat distribution. This efficiency reduces energy consumption and shortens processing times, ideal for both small-scale jewelers and large refineries. The material’s thermal shock resistance allows it to withstand extreme temperature fluctuations—from room temperature to 1600°C—without cracking, ensuring longevity even under rigorous use.

In jewelry manufacturing, these crucibles enable precise alloying of gold with metals like silver or copper, creating durable, high-karat products. Their non-reactive surface eliminates cross-contamination, crucial for producing consistent, defect-free alloys. Industrial gold refining operations benefit from the crucible’s durability, handling large batches of raw gold ore or scrap while resisting corrosion from fluxes and slag.

Recycling processes, such as recovering gold from electronic waste, rely on these crucibles to melt down mixed materials without introducing impurities. Laboratories also use them for analytical testing and research, where accuracy and material integrity are paramount.

Compared to traditional clay or ceramic crucibles, graphite versions excel in heat tolerance, mechanical strength, and lifespan, reducing replacement costs. Their lightweight design and compatibility with induction furnaces further enhance operational efficiency. Customizable sizes cater to diverse needs, from handheld crucibles for artisanal use to industrial-scale models.

By combining high purity, thermal efficiency, and robust construction, graphite crucibles are indispensable for achieving premium results in gold processing, ensuring reliability, cost-effectiveness, and minimal environmental impact through energy-efficient performance.

Company Introduction

Welcome to Teen-Hot,a leading global supplier of high-quality crucibles designed for various industrial applications. We offer an extensive range of crucibles, including graphite, ceramic, and metal varieties, tailored to meet the needs of foundries, laboratories, and manufacturers. Our products are renowned for their durability, thermal resistance, and precision engineering, ensuring optimal performance in melting and heat treatment processes. With advanced manufacturing facilities and a commitment to excellence, we provide reliable, cost-effective solutions worldwide. Partner with us for your crucible needs and experience superior quality, expert support, and timely delivery.

If you have any questions, please feel free to contact us(nanotrun@yahoo.com).

Payment Methods

T/T, Western Union, Paypal, Credit Card etc.

Shipment Methods

By air, by sea, by express, as customers request.

5 FAQs of High Purity Melting Graphite crucible For Gold Smelting

1. What makes high purity graphite crucibles ideal for gold smelting? High purity graphite crucibles are crafted from 99.9%+ pure graphite, ensuring minimal contamination during gold melting. Their exceptional thermal conductivity ensures rapid, uniform heating, while their high melting point (over 3,000°C) and resistance to thermal shock prevent cracking. The non-reactive nature of graphite preserves gold’s purity, making these crucibles a top choice for precision smelting.

2. What temperature can these crucibles withstand? High purity graphite crucibles can endure extreme temperatures up to 3,000°C in inert environments. For gold smelting, which typically requires temperatures around 1,064°C (gold’s melting point), these crucibles perform effortlessly. Their structural integrity remains intact even under repeated heating cycles, making them reliable for frequent use in furnaces or induction melters.

3. How long does a high purity graphite crucible last? Lifespan depends on usage intensity and operating conditions. With proper care—avoiding sudden temperature changes, mechanical impacts, or exposure to oxidizing atmospheres—a crucible can last 20-50 melts. High-purity graphite’s durability reduces wear, but gradual oxidation or metal adhesion may require replacement over time. Regular inspection for cracks or thinning walls is recommended.

4. How should I clean and maintain the crucible? After each use, allow the crucible to cool naturally to room temperature. Remove residual metal or slag using a soft brush or non-abrasive tool. Avoid water or harsh chemicals, as moisture can cause cracking during reheating. For stubborn residues, gently heat the crucible to oxidize impurities, then brush them off. Store in a dry, dust-free environment to prolong its life.

5. Can this crucible be used for metals other than gold? Yes. High purity graphite crucibles are versatile and suitable for melting silver, platinum, copper, and other non-ferrous metals. However, avoid using them with metals that react with carbon (e.g., aluminum, titanium) at high temperatures, as this can degrade the crucible. Always check compatibility with your specific alloy to prevent contamination or damage.

(High Purity Melting Graphite crucible For Gold Smelting)