FIRE ASSAY THERMAL PENCILS / FIRE ASSAY CRAYONS
Fire assayThermal pencils resistant to litharge and still visible after the cupellation process or the fire assay process. They are ideal to mark the cupels or crucibles.
We have 3 models available
– Fire assay thermal pencil 176 x Ø 8 mm up to 1200ºC, colour blue. The outer shell is made of wood, and the inner mine is blue cobalt.
– Fire Assay Crayons 80 x Ø 8 mm for ceramic marking up to 1200ºC, colour black. There is no outer shell, the whole body of the crayon is mine.
– Fire Assay Crayons 130 x Ø 12 mm for ceramic marking up to 1200ºC, colour black. There is no outer shell, the whole body of the crayon is mine.
LONG TONGS FOR HANDLING FIRE ASSAY CRUCIBLES AND CUPELS
Cupel tongs (CT-3) are adequate for moving bigger range of cupels used in ore analysis.
Crucible Tongs (CrT) handle fire assay crucibles. Open ring (210º) is adequate for horizontal movements in and out of the furnace. Rod holds crucible while pouring into moulds.
| Reference | Length mm | Weight kg | Fits |
|---|---|---|---|
| CT 3 | 90 | 0.86 | Cupels # 6 till # 12 |
| CrT 1 | 140 | 0.5 | Crucibles 30g – 40g – 55g |
| CrT 2 | 140 | 0.5 | 50g – 65g |
FIRE ASSAY LEAD BUTTON POURING MOULDS – conic holes – Cast Iron
We have several different sizes to fit every assayer need.
| Reference | L x W x H mm | # Cones | Size of cone mm | Volume of cone ml |
|---|---|---|---|---|
| BM-2 | 160 x 75 x 55 | 2×1 | Ø 51 x 32 | 21 |
| BM-6a | 676 x 105 / 40 x 60 | 6×1 | Ø 75 x 38 | 55 |
| BM-6 | 385 x 60 x 45 | 3×2 | Ø 51 x 28 | 19 |
| BM-12 | 355 x 254 x 46 | 4×3 | Ø 75 x 38 | 55 |
SLAG & LEAD BUTTON POURING MOULDS – Conic hole- Big capacity – Cast iron
We have several different sizes to fit every assayer need.
Here is a guide on how to employ them:
● Pre-heat the mould before pouring to avoid thermal shock breakage
● Empty the whole Crucible charge into one CONICAL SLAG MOULD.
● Pour Slag phase and metal phase in a single crucible tilt.
● Slag phase floats on top & heavier metal phase sinks to bottom
● Paint each cone with a bone ash coating to avoid pitting
● Add / or apply a red release agent to reduce sticking
● Pound solidified conical Pb button to remove sticking slag flecks
| Slag Mould | Cone inside / mm | Top outside Ø / mm | Total height / mm | Brimfull capacity / ml | Weight / kg |
|---|---|---|---|---|---|
| Nº1 | Ø 45 x H 60 | Ø 60 | 85 | 32 | |
| Nº2 | Ø 60 x H 75 | Ø 85 | 105 | 70 | |
| Nº3 | Ø 70 x H 95 | Ø 100 | 120 | 120 | |
| Nº4 | Ø 95 x H 100 | Ø 120 | 155 | 235 |