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8C Magnesia Cupels

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MOQ : 5 Metric Tons

8C Magnesia Cupels Specification

Water Absorption
<5%

Usage & Applications
Assay of gold, silver, and precious alloys; mining laboratories, jewelry testing, metal analysis

Melting Point
Above 1600C

Hardness (%)
Not typically specified; designed for toughness in use

Purity(%)
98 99%

Surface Finish
Smooth, crack-free surface

Chemical Composition
MgO > 98%

Form
Cupel

Density
1.8 Gram per cubic centimeter(g/cm3)

Application
Precious metal assay, gold and silver refining laboratories

Product Type
Fire Assay Cupels

Types of Refractories
Basic Refractory

Shape
Cup-shaped/Deep cavity

Porosity
Optimized for efficient lead absorption

Dimensional Stability
Excellent, maintains shape at assay temperatures

Strength
High mechanical strength, suitable for high-temperature cupellation

Specific Gravity
2.2 2.3

Thermal Conductivity
Low, optimized for heat retention

Color
White to light grey

Weight
Approx. 1820g per cupel (varies by size)

Shelf Life
Indefinite under proper storage conditions

Compliance
Meets international standards for fire assay

Cupel Size (OD x Height)
Typically 25mm x 19mm (custom sizes available)

Maximum Firing Temperature
Consistently up to 1200C in repeated use

Thermal Shock Resistance
Excellent, resists cracking under rapid heating and cooling

Storage Requirement
Store in dry area to maintain porosity and absorbency

Absorption Capacity
Designed for efficient absorption of lead oxide during cupellation

8C Magnesia Cupels Trade Information

Minimum Order Quantity
5 Metric Tons

Supply Ability
50 Metric Tons Per Month

Delivery Time
45 Days

Main Domestic Market
All India

About 8C Magnesia Cupels

Other Detail :-

Application : Industrial;,Commercial
Color: Milky White
Material: Magnesia
Mgo Content: 99%
Size: Customize

Features :-

Portable
Less Maintenance
Durable

Technical details

Packaging Size	240 Piece
Color	Milky White
Material	Magnesia
Mgo Content	99%
Brand	iMagCup
Height	31 mm
Width	44.8 mm
Ridge	11 mm
Depth	12.5 mm
Weight Per Cupel	89 g
Lead Absorption Capacity	65-70%
Box Weight	22.3 Kg

Optimized for Precision Assays

8C Magnesia Cupels excel in the precise analysis of gold, silver, and precious alloys, commonly used by mining laboratories, jewelry testing centers, and refining facilities. Their deep cavity form, high mechanical strength, and low water absorption (<5%) ensure consistent performance in demanding assay conditions. The optimized porosity provides excellent absorption of lead oxide, contributing to accurate and reliable fire assay results.

Superior Material and Build Quality

Manufactured from over 98% pure MgO, these cupels display excellent dimensional stability, maintaining their shape even under repeated exposure to high temperatures. The smooth, crack-free surface allows for seamless cupellation, while their basic refractory type ensures high resistance to thermal shock. With a specific gravity of 2.22.3 and density of 1.8 g/cm, each cupel is crafted for toughness and consistent results with each use.

FAQs of 8C Magnesia Cupels:

Q: How should 8C Magnesia Cupels be stored to maximize their longevity?

A: To maintain their porosity and absorbency, store 8C Magnesia Cupels in a dry location. Proper storage protects them from moisture and ensures their indefinite shelf life and optimal performance.

Q: What is the main benefit of using magnesia cupels in precious metal assay?

A: Magnesia cupels offer superior absorption of lead oxide during the cupellation process, yielding clean, precise separation of gold, silver, and other precious metals for accurate assay results.

Q: When should I use 8C Magnesia Cupels in my refining process?

A: Use 8C Magnesia Cupels during the cupellation stage of fire assay, particularly when testing and refining gold, silver, and precious alloy samples in laboratory or mining environments.

Q: What process are these cupels specifically designed for?

A: 8C Magnesia Cupels are engineered for the fire assay process, notably cupellation, where they absorb oxidized lead from melted alloy, leaving behind precious metal beads for analysis.

Q: Where are 8C Magnesia Cupels commonly used?

A: These cupels are widely employed in gold and silver refining laboratories, mining labs, jewelry testing, and facilities dealing with precious metal analysis throughout India and internationally.

Q: What makes 8C Magnesia Cupels stand out regarding thermal shock resistance?

A: Their high-purity magnesia composition provides exceptional resistance to rapid changes in temperature, minimizing the risk of cracking under repeated cycles of heating and cooling up to 1200C.

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