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Magnesia Cupels

Name: Magnesia Cupels
Brand: INDIAN MAG CUPELS
Price: 2500.0 INR
Availability: InStock

Price 2500.0 INR/ Metric Ton

Get a Price/Quote

MOQ : 1 Metric Ton

Magnesia Cupels Specification

Chemical Composition
MgO 98%, SiO2 <1%

Application
Gold and Silver Assaying, Fire Assay

Melting Point
Above 1600C

Surface Finish
Smooth, Non-Glazed

Usage & Applications
Quantitative Gold and Silver Analysis, Precious Metal Recovery

Water Absorption
<20%

Purity(%)
98 99%

Form
Solid, Cup

Density
2.0 Gram per cubic centimeter(g/cm3)

Hardness (%)
Approximately 80%

Product Type
Fire Assay Cupel

Types of Refractories
Basic Refractory

Shape
Cup-shaped, Shallow Dish

Porosity
Controlled, 28-32%

Dimensional Stability
Excellent at High Temperatures

Strength
High Compressive Strength

Specific Gravity
2.5 3.05 g/cm

Thermal Conductivity
Low

Color
White/Grey

Packing Type
Corrugated Boxes or Custom Packaging

Lead Absorption Capacity
Up to 80% by Weight

Eco-Friendliness
Non-Toxic, Crystalline Structure, Environmentally Safe

Cupel Volume
Variable, typically 30-50 ml

Thermal Shock Resistance
High

Shelf Life
12-18 Months Under Proper Storage Conditions

Typical Batch Size
500 - 1000 Pieces

Moisture Content
<1% at Packaging

Ash Release
Minimal Ash Production During Assay

Compatibility
Suitable for Most Modern Assay Furnaces

Dimension
Available in 8g, 10g, 15g, 20g, 30g, 35g, 40g Standard Sizes

Magnesia Cupels Trade Information

Minimum Order Quantity
1 Metric Ton

Payment Terms
Cash Advance (CA)

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 Export Market(s)
Western Europe, Australia, North America, Eastern Europe, Middle East, Central America, South America, Asia, Africa

Main Domestic Market
All India

About Magnesia Cupels

We are counted amongst the reputed names of market actively involved in providing a remarkable range of Magnesia Cupels to our customers. These are manufactured from the quality approved materials to ensure their highest strength and durability. Moreover, these Magnesia Cupels are maintenance free and available in a diverse range of specifications as per demands.

Other Detail :

Application : Industrial;,Commercial

Color: Milky White

Material: Magnesia

Mgo Content: 99%

Size: Customize

Superior Fire Assay Performance

Magnesia Cupels provide high accuracy and reliability in quantitative analysis of gold and silver. Their unique crystalline structure and basic refractory nature guarantee minimal ash release and excellent lead absorption, even at extreme temperatures. Controlled porosity enhances separation efficiency while the smooth surface prevents sample loss during the assay process.

Environmentally Safe and Durable

With a composition of 98% MgO and less than 1% SiO2, these cupels are non-toxic, environmentally friendly, and offer low thermal conductivity. Designed for durability, they exhibit high compressive strength and remarkable resistance to thermal shocks, maintaining stability and effectiveness through rigorous usage in assay furnaces.

Consistent Quality and Flexible Sizing

Available in standard sizes ranging from 8g to 40g and variable volumes (3050 ml), each batch is quality-tested for optimal moisture content (<1%) and density (2.0 g/cm). Magnesia Cupels are securely packed in corrugated boxes or custom packaging, ensuring safe transport and a shelf life of 1218 months with proper storage.

FAQs of Magnesia Cupels :

Q: How are magnesia cupels used in gold and silver assaying?

A: Magnesia cupels are primarily used in the fire assay process to separate precious metals (gold and silver) from lead and other impurities. The sample and lead are melted together in the cupel at high temperatures, where the cupel absorbs the lead oxide, leaving behind pure metal beads for analysis.

Q: What benefits do magnesia cupels provide over other types?

A: Magnesia cupels offer superior thermal shock resistance, minimal ash production, and high lead absorption (up to 80% by weight). Their high MgO purity (9899%), controlled porosity, and smooth surface also enhance accuracy, reduce contamination, and facilitate easier metal recovery.

Q: When should I choose specific dimensions of magnesia cupels?

A: Select the cupel size based on the sample amount and assay requirements. Smaller sizes (8g15g) are used for low-volume or laboratory tests, while larger sizes (20g40g) are preferred for bulk sampling or industrial-scale analyses. The variable volume (3050 ml) accommodates diverse operational needs.

Q: Where can magnesia cupels be used?

A: Magnesia cupels are suitable for most modern assay furnaces and are widely used in analytical laboratories, mining companies, precious metal refineries, and research facilities involved in gold and silver analysis and recovery processes.

Q: What is the process for using these cupels in a fire assay?

A: In a typical fire assay, the ore sample is mixed with flux and lead, placed in the magnesia cupel, and heated in a furnace above 1000C. As the lead oxidizes, the cupel absorbs the lead oxide, allowing the remaining gold and silver alloy to be collected for quantitative analysis.

Q: What precautions should be taken for storage and handling?

A: Store magnesia cupels in a dry environment, away from moisture, as their moisture content should remain below 1%. Proper packaging in corrugated boxes helps prevent damage. Under these conditions, cupels maintain quality for 1218 months.

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