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Size 8 Magnesia Cupels

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MOQ : 5 Metric Tons

Size 8 Magnesia Cupels Specification

Purity(%)
98%

Surface Finish
Smooth outer surface, porous interior

Water Absorption
High, suitable for cupellation process

Density
2.0 Gram per cubic centimeter(g/cm3)

Usage & Applications
Gold, silver, and platinum group metals analysis

Chemical Composition
MgO main content

Form
Solid, pre-formed

Application
Laboratory use for precious metal assay and analysis

Hardness (%)
Approximately 70-80%

Melting Point
>2800C

Product Type
Magnesia Cupel

Types of Refractories
Basic Refractory

Shape
Round cup/bowl

Porosity
High (to absorb litharge effectively)

Dimensional Stability
Excellent, no deformation at high temperature

Strength
High compressive strength, designed to withstand rapid heating

Specific Gravity
2.3-2.5 g/cm

Thermal Conductivity
Low

Color
Greyish white

Bulk Packaging
Packed in cartons or wooden boxes

Lead Absorption
Excellent, absorbs litharge during assay

Weight per Piece
Approx. 55-65 grams

Shelf Life
Stable, if kept dry

Operating Temperature
Up to 1100C continuous

Cupel Size
Size 8 (approx. 40 mm diameter x 25 mm height)

Capacity
Suitable for 25-30g lead assay

Odor
Odorless

Fire Resistance
Very high

Resistance
Thermal shock resistance

Size 8 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 Size 8 Magnesia Cupels

Other Detail :-

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

Features :-

Portable
Less Maintenance
Durable

Technical details.

Packaging Size	240 Piece
Color	Milky White
Material	Magnesia
Mgo Content	99%
Brand	iMagCup
Height	27.1 mm
Width	44.3 mm
Ridge	9 mm
Depth	8.5 mm
Weight Per Cupel	72.5 g
Lead Absorption Capacity	65-70%
Box Weight	18.2 Kg

Superior Thermal Performance for Cupellation

Size 8 Magnesia Cupels offer remarkable thermal stability, designed to operate seamlessly up to 1100C without deforming, thanks to their high MgO content and basic refractory properties. Their durable structure ensures excellent dimensional stability and compressive strength, essential for demanding laboratory environments. Their high melting point (>2800C) and fire resistance provide peace of mind during intensive precious metals analysis procedures, delivering reliable performance assay after assay.

Optimized Design for Precious Metal Assays

Each magnesia cupel is expertly shaped as a round cup with a smooth exterior and porous interior, tailored for efficient litharge absorption during cupellation processes. Size 8 cupels (40 mm diameter x 25 mm height) support the analysis of 25-30g lead samples with high water absorption capacity and low thermal conductivity. Their stable, odorless, and greyish-white solid form withstands rapid heating, ideal for routine use in gold, silver, and platinum assays.

FAQs of Size 8 Magnesia Cupels:

Q: How are Size 8 Magnesia Cupels used in the cupellation process?

A: Size 8 Magnesia Cupels are used to separate precious metals from lead and other base metals during fire assay analysis. A sample combined with lead is placed in the cupel and heated to around 1100C, where the cupels porous structure absorbs litharge (lead oxide), leaving behind purified gold, silver, or platinum group metals.

Q: What benefits does a Size 8 Magnesia Cupel offer over other types?

A: These cupels deliver excellent lead absorption due to their high porosity and MgO purity (98%). Their thermal shock resistance, dimensional stability, and fire resistance ensure consistent, reliable performance even at elevated temperatures, minimizing risks of cracking or deformation during rapid heating cycles.

Q: When should I replace a magnesia cupel during precious metal analysis?

A: Replace a magnesia cupel after each assay run, as its absorption capacity diminishes and structural integrity may be compromised once it has absorbed litharge. Proper disposal and replacement ensure accurate results in all subsequent assays.

Q: Where should Size 8 Magnesia Cupels be stored to maximize shelf life?

A: Store Size 8 magnesia cupels in a dry environment, ideally inside cartons or wooden boxes as supplied. Keeping them away from moisture preserves their structural and absorption qualities for a stable, long shelf life.

Q: What process does the cupel undergo during a gold or silver assay?

A: The cupel undergoes cupellationa high-temperature process where the lead and other base metals oxidize, and the porous magnesia absorbs the resulting litharge, isolating precious metals in their elemental form for further analysis.

Q: How does the cupels chemical composition support its high-temperature performance?

A: With MgO as its main component, the cupel boasts a melting point above 2800C, high compressive strength, and low thermal conductivity. This composition imparts the dimensional stability and resistance needed to endure repeated heating during metal assays.

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