| Refractoriness (℃): | 1580< Refractoriness< 1770 |
|---|---|
| Feature: | Long Time Materials |
| Type: | Refractory Material |
| Shape: | Brick |
| Material: | MgO-Carbon Brick |
| Size: | 6hb 12hb 24h |
| Customization: |
|---|
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Audited Supplier Cupel Block
The Cupel Block is an advanced fire assay gold test container. Advanced gold testing institutions in Europe and the United States, as well as precious metal testing institutions in Hong Kong, Macau, Taiwan, and Singapore, all use this bullion block. The main component is magnesia.
It can handle 12 or 24 samples at the same time, which is especially suitable for testing institutions with large amount of testing
Cupel is a porous refractory vessel for absorbing lead oxide (or bismuth oxide) when cupellating lead button (or bismuth button). There are three kinds of cupels commonly used: cement, bone ash cement and magnesia.
The cement cupel is hard and not easy to crack, but the loss of precious metals during cupellation is larger than the latter two.
Bone ash cupels made of pure bone ashes are looser and can be used for cupellation of crude gold and alloy gold. Assay analysis generally uses a mixture of bone ashes and cement, which is harder than pure bone ashes, but softer than cement. Using bone ashes-cement cupel for cupellation, the loss of gold and silver is smaller than that of cement cupel. The preparation of ashes is more troublesome, and it can be made through several processes of burning and grinding.
The loss of precious metals during magnesia cupel cupellation is smaller than the previous two.
The main component of magnesia is magnesia, which is a good refractory material and can resist the erosion of breaking flux. The ashes-cement cupel contains more silicates. After cupellation, small pits will appear on the surface of the cupel, and precious metals will be lost. Using magnesia cupel, there is no such phenomenon , and the surface is very smooth.
|
Model |
No of Holes |
Diameter of Cup |
Depth of Cup |
Block Size |
|
12HB |
12 |
22 mm |
10 mm |
165 * 60 * 20 mm |
|
24HB |
24 |
22 mm |
10 mm |
330 * 120 * 20 mm |
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Audited Supplier 
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