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6A 7A 8A Fire Assay Magnesia Cupel for Melting Gold

Ceramic sagger


Fire assay crucible

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Product description


Product Introduction of the Magnesia Cupel:

Cupel is a porous refractory for absorbing lead oxide when ash blows lead buckle.The main component of magnesia is magnesium oxide, which is a very good refractory and can resist the erosion of alkaline flux.Lead oxide is a very strong alkaline flux. At high temperature, the affinity between lead oxide and silica is very strong, which can invade the silicate in cupel.There are more silicate in ashcupel and cement cupel. After blowing with this kind of cupel, there will be pits on the surface of the cupel, and precious metals will be lost as a result.Using magnesia cupel, no such phenomenon after ash blowing, the surface is very smooth.


Product Parameter of the Magnesia Cupel : 产品参数

Made of Magnesite . 

Used for smelting and assaying .

High thermal shock resistance .

Magnesia: ≥95% .

Silica, Silicon dioxide: 0-5% .



Silica, Silicon dioxide







Product Property of the Magnesia Cupel :  产品性能

High refractoriness(1100 centigrade degrees);

Rapid absorption(70%);

Recovery rate of 97%-98.5%;

Easy to use;

Without milling .


Product Diversfication of the Magnesia Cupel :  产品多样化

Ceramic cupel, cupel block, cupel tray, meet the requirements of various specifications, conventional models are available from stock.


Product Specification of the Magnesia Cupel :  灰皿规格

6A,7A,8A,9A cupel are available from stock.


Product Specification of the Magnesia Cupel block:  灰皿板规格

6 holes cupel block, 12 holes cupel block, 24 holes cupel block, and multiple samples can be blown at the same time, especially suitable for testing institutions with large assay volume



Lots of inventory factory direct selling : 大量库存工厂直销


12 holes cupel block;

24 holes cupel block;

Have our own large area of independent warehouse, mass production, greatly reduce costs, meet customer needs at any time.


Product Packing of the Magnesia Cupel : 产品包装

The cupel are usually packed in 200,300,500 PCS per carton, which are finally packed in wooden pallet with 100% safety packaging. Also can be customized according to the customer packaging, more humane, more to meet customer requirements.


We have a large supply in stock. Factory direct sales .


Product advantages of the Magnesia Cupel : 产品优点

Professional Manufacturer in China;

Offer high quality products with good price;

Can do customized design;

Free samples;

Inventory available.


Product Application of the Magnesia Cupel : 产品用途

Precious metal analysis;

Laboratory testing;

Mining laboratory;

Mineral assaying ;

Fire assaying;

Gold assaying.




7000 square meters work shop

Automatic production line

Longer working life

Reasonable price

All prototype products have to go through 4 checks in the whole process:
1. Raw material inspection
2. In processing inspection
3. Final inspection
4. Outgoing inspection


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