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7AL Magnesia Cupels

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MOQ : 5 Metric Tons

7AL Magnesia Cupels Specification

Water Absorption
Low

Chemical Composition
High purity magnesia (MgO)

Purity(%)
>97%

Usage & Applications
Assaying and refining of gold, silver, and other precious metals

Form
Solid

Application
Precious metal analysis, fire assay for gold and silver

Surface Finish
Smooth internal surface

Hardness (%)
Approx. 85%

Density
2.3 Gram per cubic centimeter(g/cm3)

Melting Point
Above 1550°C

Types of Refractories
Basic

Shape
Cup-shaped (round with deep cavity)

Porosity
High, controlled for absorption

Dimensional Stability
Excellent at high temperatures

Strength
High mechanical strength

Specific Gravity
2.3 g/cm³ to 2.4 g/cm³

Thermal Conductivity
Low

Color
White/Grey

Cavity Diameter
Standard 32mm (other sizes available)

Height
Approx. 28mm

Absorption Capacity
Efficient lead and litharge absorption

Thermal Shock Resistance
Excellent

Storage Conditions
Store in dry conditions, avoid moisture exposure

Packing Type
Carton, tray, or custom packaging

Cupel Capacity
30-50 grams lead (Pb)

7AL Magnesia Cupels Trade Information

Minimum Order Quantity
5 Metric Tons

Supply Ability
50 Metric Tons Per Month

Delivery Time
45 Days

Sample Available
Yes

Sample Policy
Contact us for information regarding our sample policy

Main Domestic Market
All India

About 7AL Magnesia Cupels

7AL Magnesia Cupels are mainly utilized for the purification of gold and silver. These cupels efficient absorbs all lead impurities and leaves only hundred percent pure metal. These have high structural strength which prevents their cracking or breaking over the course of time. Moreover, these 7AL Magnesia Cupels are maintenance free and easy to use.

Other Detail :

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

Technical details

Color	Milky White
Material	Magnesia
Mgo Content	99%
Packaging Size	420 Piece
Brand	iMagCup
Height	28.5 mm
Width	39.7 mm
Ridge	6 mm
Depth	12.3 mm
Weight Per Cupel	55 g
Lead Absorption Capacity	65-70%
Box Weight	24.3 Kg

Superior Absorption and Performance

The 7AL Magnesia Cupels excel in absorbing lead and litharge during precious metal analysis, thanks to their optimized porosity and high-quality magnesia composition. Their controlled pore structure ensures efficient absorption while retaining refined metals with exceptional clarity, making them suitable for rigorous gold and silver fire assay procedures.

Durability under Extreme Conditions

Built to withstand temperatures exceeding 1550C and offering excellent thermal shock resistance, these cupels maintain dimensional stability and high mechanical strength throughout demanding assay cycles. The smooth internal surface and low water absorption further contribute to their reliability and long service life in laboratory and industrial settings.

Versatile Applications and Custom Sizing

Primarily used for assaying and refining gold and silver, the cupels also find applications in other precious metal analyses. Available in standard or custom sizes, with various packing options, they cater to diverse operational needs across the distribution, export, and manufacturing sectors in India and abroad.

FAQs of 7AL Magnesia Cupels:

Q: How are 7AL Magnesia Cupels used in fire assay processes?

A: 7AL Magnesia Cupels are used to absorb lead and litharge during the fire assay process of gold, silver, and other precious metals. The sample, mixed with flux and lead, undergoes high-temperature treatment where the cupel absorbs impurities, leaving behind a bead of refined precious metal.

Q: What benefits do magnesia cupels offer over traditional materials?

A: Magnesia cupels provide excellent thermal shock resistance, low thermal conductivity, and high absorption efficiency, resulting in cleaner separations. Their high purity (>97% MgO) and controlled porosity ensure minimal contamination and precise assay outcomes.

Q: What storage conditions are recommended for 7AL Magnesia Cupels?

A: It is advised to store these cupels in dry conditions and avoid exposure to moisture. Proper storage helps maintain their structural integrity and absorption properties for reliable assay results.

Q: Can 7AL Magnesia Cupels be customized for specific requirements?

A: Yes, besides the standard 32mm cavity diameter and 28mm height, other sizes and custom packaging options are available to suit unique laboratory or industrial requirements.

Q: What industries commonly use these cupels, and why?

A: Laboratories, refiners, and precious metal assayers frequently use these cupels due to their high efficiency in separating precious metals and their durable, high-strength, magnesia construction, supporting accurate and reproducible results in critical analyses.

Q: Where are 7AL Magnesia Cupels manufactured and distributed?

A: These cupels are manufactured, distributed, exported, and supplied mainly in India, with global distribution channels for wholesale and laboratory supply markets.

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