Magnesium Oxide Cupel Block

Magnesium Oxide Cupel Block is a large, monolithic refractory block made from high-purity, high-density magnesium oxide. Its surface contains multiple neatly arranged cupellation holes or cavities. Each cavity acts as an independent miniature reaction vessel for the cupellation process at high temperatures.

During the fire assay and cupellation processes, our magnesium oxide cupel blocks will not cause lead splashing. They can quickly absorb large amounts of lead oxide, leaving behind high-purity gold and silver alloy grains within the cupels. They do not crack or suffer pitting at high temperatures, and they are not affected by weather, preventing freezing tendencies. After the cupellation process, the gold and silver alloy grains are easily removed from the cupels.

Heeger Materials' Magnesium Oxide Cupel Blocks can be stored for a long time without quality degradation due to weather conditions. The cupel blocks don't require pre-drying before their first use, thereby maintaining high quality and ensuring minimal loss of precious metals, such as gold and silver. We can also supply high-quality Magnesium Oxide Cupels in various specifications and customized solutions.

Magnesium Oxide Cupel Block Specifications

Magnesium Oxide Cupel Block Specifications (Bevel-Edge and Straight-Edge) 

Magnesium Oxide Cupel Block Advantages

• High-quality raw materials and scientific formulation
• Perfectly uniform appearance, smooth surface, and high quality
• High mechanical strength and excellent thermal shock resistance
• Unaffected by atmospheric changes, reducing freezing tendency
• Lead-free, crack-free, and pitting-free
• Can quickly absorb up to 70% of its weight in lead oxide, with highly consistent low loss on ignition
• Granular form is easy to handle
• ISO 9001 quality management system certified
• Latest machine manufacturing, premium raw materials, and scientific formulation
• Ongoing research and regular testing in our own laboratory
• Customizable according to customer requirements

Magnesium Oxide Cupel Block Applications

• Fire Assaying: Primarily used in lead and tin cupellation to separate and collect precious metals like gold and silver.
• Mining & Geology: For accurately determining the grade of precious metals in ores and geological samples.
• Metallurgy & Refining: Used in process control and analysis of intermediate and final products (e.g., bullion).
• Recycling: To analyze and recover precious metals from electronic waste (e-waste) and spent industrial catalysts.

Magnesium Oxide Cupel Block Packaging

The Magnesium Oxide Cupel Block is securely packed in wooden crates or cartons, reinforced with cushioning materials to prevent movement during transit. This packaging approach ensures that the products remain intact and protected throughout the shipping process.

Where to Buy Magnesium Oxide Cupel Block in Bulk?

Heeger Materials Inc., a professional supplier and manufacturer of high-quality Magnesium Oxide Ceramics (MgO) products, including Magnesium Oxide Cupel Blocks, leverages extensive expertise in supply and export to offer competitive prices. We provide customized solutions to meet specific requirements, ensuring exceptional quality and customer satisfaction.

Heeger Materials Inc. was established in 2016 in Colorado, USA. We specialize in premium-grade metals, alloys, ceramics, powders, and other materials catering to research, development, and large-scale industrial production in scientific and industrial sectors.