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6A Magnesia Cupels

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MOQ : 5 Metric Tons

6A Magnesia Cupels Specification

Form
Solid, Cupel Form

Chemical Composition
Magnesium Oxide (MgO) > 96%

Hardness (%)
8090%

Melting Point
Approximately 2800C

Density
1.6 Gram per cubic centimeter(g/cm3)

Usage & Applications
Cupellation process in fire assay, refining and analysis of noble metals

Water Absorption
< 5%

Purity(%)
>96%

Application
Gold and Silver Assaying, Precious Metal Analysis, Fire Assay

Surface Finish
Smooth, pore-optimized

Product Type
Magnesia Cupel

Types of Refractories
Basic Refractory

Shape
Cup (Standard Cupel Shape)

Porosity
Optimized for precious metal absorption

Dimensional Stability
Excellent at high temperatures, maintains shape without deformation

Strength
High mechanical strength, suitable for repeated high-temperature use

Specific Gravity
2.7 - 3.2 g/cm

Thermal Conductivity
Low

Color
White / Off-white

Recommended Assay Temperature
950-1050C

Packaging
Carton or bulk packaging, 1000 pieces per box

Cupellation Loss
Negligible

Resistivity to Slag Attack
Excellent

Shelf Life
Indefinite under proper storage

Storage Conditions
Store in cool, dry place to prevent moisture absorption

Size/Capacity
6A standard (for 30-35g lead) approx. 38mm diameter, 22mm height

Absorbency
High absorbency for lead oxide (PbO)

6A 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 6A Magnesia Cupels

Being the customer oriented organization, we are highly dedicated towards providing a supreme quality range of 6A Magnesia Cupels to our customers. These are extremely durable and demands less maintenance. These can easily withstand high temperature and pressure. Moreover, these do not not crack or break over the course of time. We ensure to deliver these 6A Magnesia Cupels safely at affordable price range.

Other Detail :

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

Technical details

Brand	iMagCup
Packaging Size	300 Piece
Height	25.4 mm
Width	40 mm
Ridge	6 mm
Depth	12.3 mm
Weight Per Cupel	47.5 g
Color	Milky White
Lead Absorption Capacity	65-70%
Box Weight	15 Kg

Superior Resistance and Durability

Constructed from high-grade magnesium oxide, 6A Magnesia Cupels feature a hardness of 8090% and are engineered to endure repeated exposure to extreme temperatures. Their robust, smooth structure maintains dimensional stability and resists slag attack during intensive fire assay processes, ensuring consistent results with minimal loss or distortion.

Precision in Precious Metal Analysis

With optimized porosity and high absorbency, these cupels efficiently absorb lead oxide while retaining gold and silver residues. Their low thermal conductivity and minimal water absorption provide a stable environment for accurate fire assay testing, making them essential for gold and silver analysis in refineries, mints, and assay laboratories.

FAQs of 6A Magnesia Cupels:

Q: How are 6A Magnesia Cupels used in gold and silver assaying?

A: 6A Magnesia Cupels are utilized during the cupellation stage of fire assay, where they absorb lead oxide (PbO) from molten samples. This process isolates precious metals like gold and silver, allowing for accurate quantification and analysis.

Q: What makes magnesia cupels preferable over other materials for fire assay?

A: With a chemical composition of over 96% magnesium oxide, these cupels possess exceptional resistivity to slag attack and high mechanical strength. Their optimized porosity ensures efficient absorption of lead oxide while retaining precious metals, reducing contamination risk and cupellation loss.

Q: When should 6A Magnesia Cupels be replaced during use?

A: 6A Magnesia Cupels are designed for single-use during the fire assay process to ensure purity and prevent cross-contamination between samples. After each assay session, a new cupel should be used for accurate results.

Q: Where should 6A Magnesia Cupels be stored to maximize shelf life?

A: To ensure indefinite shelf life, store the cupels in a cool, dry environment away from moisture. Proper storage prevents water absorption, maintaining both strength and absorbency.

Q: What is the recommended temperature range for optimal cupellation with these cupels?

A: These cupels perform best within an assay temperature range of 9501050C. Their excellent dimensional stability and thermal resistance ensure they maintain shape and efficiency throughout the process.

Q: How do the cupels porosity and density benefit precious metal testing?

A: The optimized porosity allows for effective lead oxide absorption without absorbing the precious metals. A density of 1.6 g/cm ensures both lightweight handling and structural integrity during high-temperature processes, advancing overall assay accuracy.

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