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4A Magnesia Cupels

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MOQ : 5 Metric Tons

4A Magnesia Cupels Specification

Melting Point
Above 1500 °C

Purity(%)
Typically 98% or above

Density
3.0 Gram per cubic centimeter(g/cm3)

Usage & Applications
Precious metal assaying, gold and silver refining

Chemical Composition
High purity Magnesium Oxide (MgO), with minor trace elements

Hardness (%)
Approx. 60-70 % of theoretical max

Surface Finish
Porous matte finish

Application
Used for cupellation, assaying, gold and silver refining

Form
Solid refractory cup

Water Absorption
High, optimized for cupellation

Types of Refractories
Basic Refractory

Shape
Round cup with concave surface

Porosity
High porosity for efficient absorption of lead oxide

Dimensional Stability
Excellent under high temperature

Strength
High mechanical strength, resists thermal shock

Specific Gravity
2.95 - 3.08 g/cm³

Thermal Conductivity
Low thermal conductivity, superior heat insulation

Color
White or light grey

Manufacturer Standard
ISO compliant

Cupel Size
Standard 4A (various diameter and height on request)

Odor
Odorless

Shelf Life
Long, if kept dry and clean

Absorption Efficiency
High, absorbs litharge efficiently

Packing Details
Packed in secure corrugated boxes

Resistance to Chemical Attack
Excellent against fluxes used in assaying

Lead Absorption Capacity
Optimized for large lead button capacity

Heat Resistance
Withstands repeated heating to red heat

4A 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 4A Magnesia Cupels

4A Magnesia Cupels are widely praised due to their high structural strength that enables them to easily adapt adverse atmospheric conditions like extreme heat or extreme pressure etc. These are fabricated from the top grade materials and further checked by our quality experts to ensure its defect free dispatch from our end. These 4A Magnesia Cupels are extremely durable and reliable.

Other Detail :

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

Technical details

Packaging Size	900 Piece
Color	Milky White
Material	Magnesia
Mgo Content	99%
Height	22 mm
Width	27 mm
Ridge	7.5 mm
Depth	6 mm
Weight Per Cupel	22 g
Box Weight	20.5 Kg
Lead Absorption Capacity	65-70%

High Purity and Performance

Engineered from high-purity Magnesium Oxide (MgO), 4A Magnesia Cupels provide exceptional resistance to fluxes and chemicals typical in precious metal assaying. Their impressive mechanical strength maintains cupel form, even during intense, repeated heating cycles, ensuring consistency in every application.

Optimized Absorption Efficiency

Designed with high porosity and a specific surface finish, these cupels maximize litharge absorption, efficiently separating lead from precious metals. The superior heat insulation and low thermal conductivity ensure energy-efficient operations while maintaining cupel integrity during assaying.

Secure Packaging and Shelf Life

Each cupel is carefully packed in secure, corrugated boxes to protect against damage during transportation. With proper storagekept dry and cleanthese cupels boast a long shelf life, retaining all critical properties for reliable performance when needed.

FAQs of 4A Magnesia Cupels:

Q: How do 4A Magnesia Cupels enhance the cupellation process?

A: 4A Magnesia Cupels are engineered to absorb litharge efficiently thanks to their high porosity and optimized composition. This ensures more accurate separation of precious metals during cupellation by absorbing lead oxide without contaminating samples.

Q: What makes these cupels highly resistant to chemical attack?

A: Their composition features high purity Magnesium Oxide (above 98%), providing excellent resistance against aggressive fluxes and chemicals encountered in assaying and refining processes.

Q: When should I replace or replenish my magnesia cupels?

A: Cupels should be replaced after each assaying cycle, as their absorption capacity is designed for single-use to maintain optimal results. Using a fresh cupel for each process prevents cross-contamination and ensures accurate precious metal recovery.

Q: Where can 4A Magnesia Cupels be used?

A: They are ideal for laboratories, refineries, and assaying centers involved in the analysis and refinement of gold and silver. Their performance complies with ISO standards, making them suitable for both research and industrial environments.

Q: What are the benefits of the high mechanical strength and thermal shock resistance?

A: High mechanical strength and resistance to thermal shock mean the cupel maintains its integrity through repeated exposure to red heat and rapid temperature changes, reducing breakage and ensuring consistent performance.

Q: How should 4A Magnesia Cupels be stored for best shelf life?

A: Store cupels in a dry, clean environment within their secure packaging to prevent moisture absorption. This preserves their high porosity and structural integrity, ensuring a long shelf life and reliable function when needed.

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