Factory Supply Magnesia Cupel with Best Price
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| Customization: | Available |
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| Application: | Refractory, Metallurgy |
| Material: | MGO |
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Basic Info.
- Model NO.
- 4A, 6A, 7A. 7AS, 7AL, 7X, 8A, 9A.
- Shap
- Conical, Circular, Cylindrical, Oval etc
- Sample
- Avaliable
- Usage
- Gold Melting, Precious Metal Assay, Fire Assay
- Transport Package
- Cartons with Pallets
- Specification
- 4A, 6A, 7A. 7AS, 7AL, 7X, 8A, 9A.
- Trademark
- FIZA
- Origin
- Hebei China
- HS Code
- 69039000
- Production Capacity
- 1000000PC Per Month
Product Description
During cupellation, the lead is oxidized to litharge (PbO), most of which is absorbed by the cupel. Gold, silver, platinum and other precious metals form a bead in the cupel. The bead is subsequently treated to determine its precious metal content.
Our magnesia cupel uses high-quality raw materials and a unique formula. And its composition includes up to 95% magnesium oxide and special flux. It can absorb more lead oxide than ordinary bone ash ones. So our magnesia cupel has strong mechanical strength and perfect quality uniformity.
| Item | Result |
| MgO | ≥95% |
| Al2O3 | ≥1.2% |
| SiO2 | ≤2.5% |
| CaO | ≤1.3% |
| Working Temperature | 890ºC-1100ºC |
| Specific Gravity: | 2.35 |
| Porosity: | 12%-15% |
| Lead Absorption | 70% |
| Size | A | B | C | D | E | F |
| mm | mm | mm | mm | mm | mm | |
| 4A | 22 | 27 | 20 | 7.5 | 24 | 6 |
| 4AS | 22 | 27 | 20 | 8 | 24 | 9 |
| 6A | 26 | 40 | 30 | 6 | 30 | 12 |
| 7 | 22 | 39.5 | 29 | 6.5 | 31.2 | 11 |
| 7A | 32 | 40 | 30 | 12 | 30 | 12 |
| 7AL | 28.5 | 39.7 | 30 | 6 | 31.2 | 12.3 |
| 7AS | 34 | 40 | 30 | 14 | 30 | 12 |
| 8 | 27.1 | 44.3 | 34.6 | 9 | 34.2 | 8.5 |
| 8A | 35 | 45 | 37 | 13 | 38 | 13 |
| 9A | 34 | 51 | 39 | 14 | 40 | 15 |
Cartons with pallets, or as your request.
High quality magnesite is the majoritary component of magnesia cupels.
As a rule of thumb, magnesia cupels have a superior quality and offer many advantages:
- Great mechanical strength, and are not affected by atmospheric conditions (not hygroscopic). .
- The prill or bead does not adhere to the fire assay cupel surface,
- When using magnesia cupels, the assay have a reduced tendency to freeze.
- No cracking or spiting, and the beads do not attach to the fire assay cupel surface.
- Magnesia cupels provide security and quickly absorb great amounts of litharge without cracking or pitting.
- Our magnesia cupels allow to reduce the Cupellation temperature and time, resulting in minimal losses, higher accuracy and better yields.
- Perfect uniformity of Quality of cupels
- Quality and performance are continuously improved
Welcome to contact me for Quotation!
Vivien Liang
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