Magnesia Bullion Block Straight edge
Magnesia Bullion Block Taper edge
Magnesia Bullion Blocks is a shallow, porous block with multiple holes, made from pure Magnesite, in which gold or silver can be refined or assayed by melting with a blast of hot air which oxidizes lead or other base metals. Magnesia Bullion Blocks are made from a unique blend of Magnesium Oxide and special fluxing ingredients. Generally cupellation furnace temperatures in gold and silver assays is 900-1000°C, but varies with technique, Air flow volume and cupel material used.
Magnesia Bullion Blocks Dimensions Data in (‘mm’)
| Size | Number of Holes |
Length of Block |
Breadth of Block |
Height of Block |
Dia of Cup |
Depth of Cup |
Height of Ridge |
Height of Taper Portion |
Average Weight (Approx.) |
Pieces Per Carton |
Gross Weight (Approx.) |
||
| L | L1 | B | B1 | H | D | H1 | H2 | H3 | (Gm's) | (Kg's) | |||
| 4 HB | 4 | 48.0 | ... | 48.0 | ... | 20.0 | 18.0 | 6.5 | ... | ... | 97.0 | 224 | 22.8 |
| 6HB | 6 | 76.5 | ... | 51.0 | ... | 20.0 | 20.5 | 8.0 | ... | ... | 150.0 | 120 | 18.8 |
| 6HB(T) | 6 | 82.0 | 72.0 | 60.0 | 50.0 | 20.0 | 22.0 | 7.0 | 6.0 | 14.0 | 184.0 | 120 | 22.8 |
| 10HB | 10 | 138.0 | 128.0 | 60.0 | 50.0 | 20.0 | 22.0 | 7.0 | 6.0 | 14.0 | 307.0 | 60 | 19.2 |
| 12HB | 12 | 80.0 | ... | 60.0 | ... | 20.0 | 14.0 | 7.0 | ... | ... | 204.0 | 105 | 22.2 |
| 12HB(E) | 12 | 80.0 | ... | 60.0 | ... | 20.0 | 16.0 | 7.0 | ... | ... | 204.0 | 105 | 22.2 |
| 12HB(L) | 12 | 165.0 | 155.0 | 60.0 | 50.0 | 20.0 | 22.0 | 7.0 | 6.0 | 14.0 | 375.0 | 48 | 19.1 |
| 14HB | 14 | 179.0 | ... | 54.0 | ... | 20.0 | 20.0 | 7.5 | ... | ... | 367.0 | 56 | 21.7 |
| 21HB | 21 | 172.0 | 162.0 | 76.0 | 66.0 | 20.0 | 22.0 | 7.0 | 6.0 | 14.0 | 476.0 | 42 | 21.3 |
| 24HB | 24 | 124.0 | 114.0 | 84.0 | 74.0 | 20.0 | 16.0 | 7.0 | 6.0 | 14.0 | 402.0 | 48 | 20.3 |
| 24HB(L) | 24 | 165.0 | ... | 120.0 | ... | 20.0 | 21.5 | 7.0 | ... | ... | 830.0 | 24 | 21.0 |
* Approximate