Cupel is a shallow, porous crucible with approximately 96% magnesia. It is especially used to separate gold, silver, and precious metals from lead buckles in the process of Pb-Fire assay. By using high-quality raw materials and scientific formulas, Our fire assay magnesia cupel has a smooth surface, high mechanical strength, and will not crack and pit during high-temperature cupellation.
Chemical Composition
1.Made of Magnesite
2.Used for smelting and assaying
3.High thermal shock resistance
4.Magnesia: ≥95%,Silicon dioxide: 0-5%
5.High refractoriness1100℃
6.Rapid absorption70%
7.Recovery rate97%-98.5%
Key Features:
l Essential for precious metal analysis in fire assay.
l High purity; approximately 96% magnesium oxide.
l Efficiently absorbs lead oxides.
l Minimizes loss of gold and silver.
l Smooth surface and high mechanical strength.
l High thermal shock resistance.
l Prevents cracking and depression during assaying.
l Withstands corrosive assay environments.
Common specifications
( It can be customized in size according to your requirement.)
| |||||||
Model | (Top OD) D | (Bottom OD) D2 | (Top ID) D1 | (Height) H | (Height of ridge) H2 | (Depth of cupel) H1 | (Weight） g |
2x | 24 | 19 | 18 | 17 | 4.5 | 8 | 13 |
3 | 26 | 20 | 23 | 20 | 8 | 5.5 | 17 |
4 | 29 | 23 | 24 | 22 | 8 | 6 | 20 |
5 | 35 | 26 | 27 | 26 | 6.5 | 8 | 35 |
6A | 40 | 30 | 30 | 26 | 6 | 12 | 62 |
7A | 40 | 30 | 30 | 32 | 10 | 12 | 72 |
7AS | 40 | 30 | 32 | 32 | 10 | 15 | 62 |
8A | 45 | 37 | 38 | 35 | 13 | 13 | 103 |
8AM | 45 | 37 | 33 | 35 | 15 | 12 | 110 |
9 | 51 | 43 | 40 | 30 | 5 | 11 | 120 |
9A | 51 | 39 | 40 | 34 | 14 | 15 | 123 |
11 | 56 | 46 | 46 | 37 | 11 | 14 | 166 |
Z27 | 27 | 27 | 23 | 23 | / | 10 | 29 |
Y40 | 40 | 40 | 32 | 30 | / | 15 | 73 |
Application:
Precious Metal Analysis
Mining Laboratory
Laboratory Testing
Mineral Assaying
Fire Assaying
Gold Assaying
Cupel is a shallow, porous crucible with approximately 96% magnesia. It is especially used to separate gold, silver, and precious metals from lead buckles in the process of Pb-Fire assay. By using high-quality raw materials and scientific formulas, Our fire assay magnesia cupel has a smooth surface, high mechanical strength, and will not crack and pit during high-temperature cupellation.
Chemical Composition
1.Made of Magnesite
2.Used for smelting and assaying
3.High thermal shock resistance
4.Magnesia: ≥95%,Silicon dioxide: 0-5%
5.High refractoriness1100℃
6.Rapid absorption70%
7.Recovery rate97%-98.5%
Key Features:
l Essential for precious metal analysis in fire assay.
l High purity; approximately 96% magnesium oxide.
l Efficiently absorbs lead oxides.
l Minimizes loss of gold and silver.
l Smooth surface and high mechanical strength.
l High thermal shock resistance.
l Prevents cracking and depression during assaying.
l Withstands corrosive assay environments.
Common specifications
( It can be customized in size according to your requirement.)
| |||||||
Model | (Top OD) D | (Bottom OD) D2 | (Top ID) D1 | (Height) H | (Height of ridge) H2 | (Depth of cupel) H1 | (Weight） g |
2x | 24 | 19 | 18 | 17 | 4.5 | 8 | 13 |
3 | 26 | 20 | 23 | 20 | 8 | 5.5 | 17 |
4 | 29 | 23 | 24 | 22 | 8 | 6 | 20 |
5 | 35 | 26 | 27 | 26 | 6.5 | 8 | 35 |
6A | 40 | 30 | 30 | 26 | 6 | 12 | 62 |
7A | 40 | 30 | 30 | 32 | 10 | 12 | 72 |
7AS | 40 | 30 | 32 | 32 | 10 | 15 | 62 |
8A | 45 | 37 | 38 | 35 | 13 | 13 | 103 |
8AM | 45 | 37 | 33 | 35 | 15 | 12 | 110 |
9 | 51 | 43 | 40 | 30 | 5 | 11 | 120 |
9A | 51 | 39 | 40 | 34 | 14 | 15 | 123 |
11 | 56 | 46 | 46 | 37 | 11 | 14 | 166 |
Z27 | 27 | 27 | 23 | 23 | / | 10 | 29 |
Y40 | 40 | 40 | 32 | 30 | / | 15 | 73 |
Application:
Precious Metal Analysis
Mining Laboratory
Laboratory Testing
Mineral Assaying
Fire Assaying
Gold Assaying
