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8A Magnesia Cupels

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MOQ : 5 Metric Tons

8A Magnesia Cupels Specification

Form
Solid cup, sintered

Application
Gold and silver assaying, precious metal testing, laboratory analysis

Chemical Composition
Magnesium Oxide (MgO) > 96%

Water Absorption
Low

Density
2.0 Gram per cubic centimeter(g/cm3)

Melting Point
Approx. 2800°C

Hardness (%)
High (Exact percentage not specified)

Purity(%)
96 - 98%

Usage & Applications
Fire assay procedures for noble metal extraction

Surface Finish
Smooth inner surface

Types of Refractories
Basic Refractories

Shape
Cup (shallow dish/concave form)

Porosity
Optimized for fast absorption of litharge (PbO)

Dimensional Stability
Retains shape under temperature fluctuation

Strength
Excellent mechanical strength for high-temperature use

Specific Gravity
2.95 - 3.05

Thermal Conductivity
Low, ideal for insulation

Color
Light Grey / Off White

Packing
Standard tray or carton for secure transit

Heat Shock Resistance
Excellent, resists cracking under rapid temperature change

Compliance
Meets laboratory assay quality standards

Manufacturing Process
Pressed and sintered for high uniformity

Shelf Life
Virtually indefinite under dry conditions

Lead Absorption
High, rapid absorption of litharge without loss of precious metals

Capacity
8A (typically accommodates standard assay sample size)

Cupel Size
Correlates to 8A standard, approx. 38mm diameter x 25mm height

8A 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 8A Magnesia Cupels

Other Detail :-

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

Features :-

Portable
Less Maintenance
Durable

Technical details

Color	Milky White
Material	Magnesia
Mgo Content	99%
Packaging Size	200 Piece
Brand	iMagCup
Height	35 mm
Width	45.3 mm
Ridge	13 mm
Depth	12.5 mm
Lead Absorption Capacity	65-70%
Box Weight	20.8 Kg
Cupel Weight	100.5 g

Superior Material Strength & Heat Resistance

8A Magnesia Cupels deliver remarkable mechanical strength and resist thermal shocks, maintaining integrity even during swift temperature changes in high-heat laboratory processes. Their basic refractory nature ensures dimensional stability and reliability. The dense, sintered MgO structure supports repeated exposure to extreme environments, aiding consistent results in gold and silver assaying procedures.

Efficient Precious Metal Recovery

Designed with high porosity and excellent litharge (PbO) absorption capacity, these cupels enable fast and effective extraction of noble metals. Their smooth, concave dish assures minimal loss of valuable metals, as rapid wicking prevents absorption beyond the outer surface. This facilitates trustworthy sample testing and promotes precise, repeatable results in laboratory settings.

Long-Term Storage & Secure Transit

With virtually indefinite shelf life under dry conditions, 8A Magnesia Cupels can be stored reliably for extended periods. Secure packing in standard trays or cartons ensures protection during transportation, minimizing risk of breakage or contamination. Users benefit from reliable product quality from delivery through to long-term inventory management.

FAQs of 8A Magnesia Cupels:

Q: How are 8A Magnesia Cupels manufactured to ensure uniformity?

A: These cupels are pressed and sintered in controlled processes, which enhances uniformity in dimensions, composition, and strength, meeting laboratory assay quality standards.

Q: What are the benefits of using magnesia cupels in gold and silver assays?

A: Magnesia cupels offer high lead absorption, excellent resistance to heat shock, and a smooth surface finish, facilitating precise separation and extraction of precious metals without significant loss.

Q: When should 8A Magnesia Cupels be replaced in laboratory use?

A: Cupels should be changed after each fire assay batch or if noticeable structural changes or contamination occur. Their robust design allows multiple uses, but optimal results come from regular replacement.

Q: Where can these cupels be sourced for laboratory or industrial needs?

A: 8A Magnesia Cupels are available via distributors, exporters, manufacturers, suppliers, and wholesalers throughout India, ensuring broad accessibility for laboratories and industrial users.

Q: How does the cupels composition affect its performance in fire assay procedures?

A: Composed of over 96% magnesium oxide, the cupel offers high purity, low water absorption, and superior thermal insulation, all essential for accurate fire assay outcomes.

Q: What is the recommended process for using 8A Magnesia Cupels in precious metal analysis?

A: Cupels are loaded with prepared assay samples and exposed to high-temperature cycles in a furnace, during which they rapidly absorb litharge and retain the extracted noble metals, readying them for final weighing and analysis.

Q: What advantages does the cupels shape and surface finish provide?

A: The shallow dish design and smooth inner surface facilitate even sample distribution and rapid litharge absorption, reducing contamination and supporting accurate assay results.

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