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3S Magnesia Cupels

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MOQ : 5 Metric Tons

3S Magnesia Cupels Specification

Surface Finish
Smooth surface, fine-grained

Form
Solid, molded

Melting Point
Above 1600C

Chemical Composition
Magnesia based (>97% MgO)

Usage & Applications
Cupellation for assaying precious metal ores and bullion

Density
1.50 Gram per cubic centimeter(g/cm3)

Water Absorption
High, designed for efficient absorption of litharge (lead oxide)

Hardness (%)
Hard, resists abrasion during process

Application
Gold and silver assaying, precious metal analysis, refining laboratories

Purity(%)
97% or above MgO purity

Types of Refractories
Basic Refractory

Shape
Cup shaped, concave

Porosity
Open porosity 28% 35%

Dimensional Stability
Excellent stability at high temperatures, retains shape during use

Strength
High cold and hot crushing strength, > 15 MPa

Specific Gravity
2.8 3.0 g/cm

Thermal Conductivity
Low thermal conductivity for efficient thermal insulation

Color
Light Grey / Off White

Fire Resistance
Withstands repeated heating and cooling cycles

Thermal Shock Resistance
Superior, prevents cracking under fast heat changes

Compliance Standard
Conforms to International Assay Standards

Sizes Available
Available in 6, 8, 10, 12, 15, 20, 25, 30, 35, 40, and 45 gm capacities

Packaging
Strong corrugated boxes with partitioned packaging for safe transport

Reaction to Slag
Chemically inert to most slags and noble metal oxides

Absorption Capacity
Excellent absorption of molten litharge and other oxidized impurities

3S 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 3S Magnesia Cupels

3 Magnesia Cupels are fabricated by making use of premium grade materials in order to establish its highest structural strength and stability against all odds. These can easily withstand high temperature and pressure. Moreover, these do not crack pr break easily over the course of time. These 3 Magnesia Cupels are maintenance free and serves an extremely durable life span.

Other Detail :

Application : Industrial;,Commercial

Color: Milky White

Material: Magnesia

Mgo Content: 99%

Size: Customize

Outstanding Fire and Thermal Performance

3S Magnesia Cupels offer exceptional thermal shock resistance, maintaining structural integrity even during rapid temperature changes. Their fire resistance supports repeated heating and cooling cycles above 1600C, making them ideal for high-temperature environments such as refining and assaying laboratories.

Efficient Absorption and Chemical Inertness

Designed for optimal absorption, these cupels effectively capture molten litharge and oxidized impurities without reacting with slags or noble metal oxides. Their high open porosity and precise magnesia composition enable consistent separation of impurities during cupellation, enhancing assay accuracy.

Comprehensive Sizes and Secure Packaging

Available in multiple sizes from 6 to 45 grams, 3S Magnesia Cupels accommodate various sample requirements and equipment. Each cupel is shipped in strong, partitioned corrugated boxes, ensuring safe transport and reducing the risk of damage prior to use.

FAQs of 3S Magnesia Cupels:

Q: How do 3S Magnesia Cupels perform under rapid temperature changes?

A: 3S Magnesia Cupels exhibit superior thermal shock resistance, preventing cracking and maintaining their shape even during abrupt heating and cooling cycles common in cupellation processes. Their robust composition ensures reliable performance across repeated uses.

Q: What impurities do these cupels absorb during the assaying process?

A: These cupels are designed for excellent absorption of molten litharge (lead oxide) and other oxidized impurities generated during the precious metal assaying process, facilitating efficient separation of noble metals from collectible ores or bullion.

Q: When should I use magnesia-based cupels instead of bone ash or other materials?

A: Magnesia-based cupels are preferred in situations where high thermal stability, chemical inertness, and resistance to slag or noble metal oxide reaction are critical. They are particularly recommended for gold and silver assaying and refining in professional laboratory settings.

Q: Where can 3S Magnesia Cupels be applied?

A: These cupels are suited for refining laboratories, gold and silver assaying, precious metals analysis, and in industrial environments where stringent international standards for accuracy and reliability are required. They are widely used by distributors, exporters, manufacturers, and suppliers within India and internationally.

Q: What is the process for using a magnesia cupel in assaying?

A: During cupellation, a pre-weighed button of metal is placed in the cupel and subjected to high temperatures. The magnesia cupel absorbs non-noble elements in the form of oxides while allowing the precious metals to remain as the final product for analysis.

Q: What benefits do 3S Magnesia Cupels offer over conventional cupels?

A: Compared to traditional materials, these cupels provide higher MgO purity, greater resistance to thermal shocks, excellent impurity absorption, and enhanced dimensional stability, all contributing to improved safety and accuracy in each assay batch.

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