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7B Magnesia Cupels

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MOQ : 5 Metric Tons

7B Magnesia Cupels Specification

Application
Assaying in gold & silver fire analysis, precious metal testing labs, and mining industries

Form
Solid, circular disc with central depression

Surface Finish
Smooth textured exterior, porous internal matrix

Chemical Composition
MgO (Magnesium Oxide) 95%+, with balance CaO and trace components

Hardness (%)
Approx. 85-90

Usage & Applications
Mainly for fire assay of precious metals, supporting laboratories, refineries, and educational institutes

Water Absorption
High, aids in lead absorption

Melting Point
Above 1600C

Density
2.0 Gram per cubic centimeter(g/cm3)

Purity(%)
Typically 95% - 98% MgO

Types of Refractories
Basic Refractory (Magnesia based)

Shape
Round cup-like, deep cavity

Porosity
Controlled/microporous to absorb lead oxide efficiently

Dimensional Stability
Excellent at high temperature, low shrinkage

Strength
High compressive strength, suitable for repeated heating and cooling

Specific Gravity
2.3 2.5

Thermal Conductivity
Low

Color
White / Light Grey

Storage Recommendation
Keep in cool, dry area to avoid moisture absorption

Absorption Capacity
Absorbs up to 30 g lead per cupel

Reusability
Single-use for optimal results; not recommended for reuse

Shelf Life
Long shelf life in dry storage, maintain away from moisture

Capacity
80-85 g

Packing
Corrugated box packaging, usually 36 or 72 pieces per box

Heat Resistance
Withstands repeated cycles up to 1100C - 1200C

Size
Standard 7B commonly 43mm diameter x 24mm height (custom sizes possible)

7B 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 7B Magnesia Cupels

We are ranked amongst the acknowledged names of market due to our supreme quality standards of 7B Magnesia Cupels that we provide at highly economical price range. These efficient suck the lead impurities from metal and ensure their maximum purity. In addition to this, these 7B Magnesia Cupels are also extremely durable and demands no maintenance.

Other Detail :-

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

Features :-

Portable
Less Maintenance
Durable

Technical details.

Packaging Size	300 Piece
Color	Milky White
Material	Magnesia
Mgo Content	99%
Brand	iMagCup
Height	32 mm
Width	39.7 mm
Ridge	12.5 mm
Depth	11.8 mm
Weight Per Cupel	67.5 g
Lead Absorption Capacity	65-70%
Box Weight	21.1 Kg

Engineered for Accurate Fire Assaying

7B Magnesia Cupels are crafted for consistent results in precious metal fire assays. The high purity magnesium oxide composition and precise controlled porosity allow for superior absorption of lead oxide while maintaining structural integrity under extreme temperatures. Perfect for use in mining, testing laboratories, and refineries.

Superior Heat and Lead Absorption Performance

These cupels withstand repeated heating cycles up to 1200C with minimal dimensional change. Their microporous matrix absorbs up to 30g of lead per cupel, supporting clean separation of precious metals during fire assay. Store in a cool, dry area for maximum shelf life and reliability.

FAQs of 7B Magnesia Cupels:

Q: How should 7B Magnesia Cupels be stored to maintain their quality?

A: Store the cupels in a cool, dry place away from moisture. Proper storage in their original corrugated box packaging helps preserve their long shelf life and prevents moisture uptake, which can affect absorption efficiency.

Q: What is the main benefit of using magnesia-based cupels for assaying?

A: Magnesia cupels offer excellent heat resistance and optimal absorption of lead oxide due to their high MgO content and controlled porosity, resulting in accurate and reliable precious metal analyses in gold and silver fire assays.

Q: When should cupels be replaced during the assaying process?

A: These cupels are designed for single use to ensure the best results. After each fire assay, use a new cupel for subsequent tests to avoid contamination and preserve result accuracy.

Q: Where are 7B Magnesia Cupels typically used?

A: They are widely utilized in gold and silver testing laboratories, mining industries, educational institutes, precious metal refineries, and supporting distribution networks both in India and abroad.

Q: What process do the cupels assist with in precious metal analysis?

A: The cupels facilitate the cupellation processabsorbing lead oxide during the fire assay, leaving a refined precious metal bead for measurement and purity analysis.

Q: How does the controlled porosity of these cupels enhance their performance?

A: Controlled microporosity allows for efficient absorption of lead oxide, minimizing the risk of splash or contamination, and providing a clean separation of precious metals from base metals during assaying.

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