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XTL sintyron bullion blocks cupel

The cupel is carefully removed from the furnace and the bullion block is allowed to cool and solidify. The resulting block is then ready to be stamped with its purity and weight, making it suitable for sale or further processing.

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XTL sintyron bullion blocks cupel

Bullion blocks are an important part of the precious metals refining process.

These blocks are made of a specific composition of metals, such as gold or silver,

that have been melted down and poured into a mold to form a solid block. 

Cupels are small, porous containers made of bone ash that are used to absorb any

impurities in the bullion blocks during the refining process. The bullion blocks are

placed on top of the cupels and heated to high temperatures in a furnace. As the bullion

blocks melt, any impurities are absorbed by the cupels, leaving behind a purer form of the metal.

Product Description


 1.Made of Magnesite or Bone .

    2.Used for smelting and assaying .

    3.High thermal shock resistance .


    Magnesia: ≥95%

    Silica, Silicon dioxide: 0-5%

    Property: High refractoriness(1100 centigrade degrees),rapid absorption(70%),and recovery                   

    rate of 97%-98.5%,easy to use, without milling .



Specifications with cupels

1.Material:Magnesian and cement

2.For the analysis of non-ferrous and precious metals.

3.We are manufacturers of fire assay crucibles and magnesite and ash bone cupels. 4.We produce

several capacity crucibles and cupels and only use selected vrgin materials for production.

5.We have special packing for export and very competitive prices. 6.Our crucibles are high standard,

for repetitive assays and free of gold.


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Company Information

3.jpgfire assay crucible (140).jpg

fire assay crucible (141).jpg 


Why us?
* Professional manufacturer since 1997.
* Strict quality control on production process and tolerance.
* Free samples available
* Customized production based on your drawing or specification
* On-time delivery and reliable support and service
* Inventory available for quick shipment
* We keep confidentiality of all the drawings and business information between us.
Are you a trading company or a manufacturer?
* We are a manufaturer. 
Can you provide the free samples?
* Yes,we can offer free sample if we have it in stock,but the courier fee is to be collected.
Do you accept customized production based our specification?
* Yes,we offer OEM and ODM service. Just send us your drawing if you have it. If you don’t have a

drawing, just tell us your idea, we will work out the drawing for you.

What's the delivery time?
* 7 working days for standard products 30 days for customized products. 
What is the MOQ?
* No limit to the quantity. We can offer the best proposal and solutions according to your condition.
What is the payment terms you accept?
* T/T,LC,Western Union,moneygram are acceptable.
How to deal with the faulty?
* Firstly, Our product are produced in strict quality control system and the defective rate will be less than 2%.
If there are problems with the product, we will provide free replacement.


Intention information