| EVENT | Date | September 27/ 2025 | ||||||||
| Description | Course | |||||||||
| Goal | basic build and operation | |||||||||
| Team | Darrell / Neil | lead | ||||||||
| Darrell / Ben Van-Es | extract | |||||||||
| Neil | measures | |||||||||
| Ben | ore | |||||||||
| Brendan Link | charcoal | |||||||||
| Margret Gissing / Samatha | prep | |||||||||
| Ben | hammer | |||||||||
| Brendan | hammer | |||||||||
| various | records | |||||||||
| all | photos | |||||||||
| FURNACE | Type | standard short shaft | ||||||||
| Material | EPK / sand / horse manure | |||||||||
| Walls | (base / top) | 5 to 4.5 | ||||||||
| OD | (base / top) | 34 to 33 | ||||||||
| ID | (base / top) | 24 | ||||||||
| at tuyere | 24 | |||||||||
| Height | 61 | |||||||||
| Stack | (tuyere to top) | 46 | ||||||||
| Base | 15 | |||||||||
| Plinth | (material / height) | block 19 | ||||||||
| Packing | charcoal fines | yes | ||||||||
| Tuyere | (type / shape) | copper | ||||||||
| ID | 2.5 | |||||||||
| Mounted | (type) | insert | ||||||||
| Angle | 22 | |||||||||
| Distance | (gap / proud) | 5 | ||||||||
| Air System | blower | |||||||||
| Extraction | bottom | |||||||||
| MATERIALS | Tap Slag | (weight) | 2 kg | |||||||
| Gromps | from previous smelts | 18 kg | ||||||||
| Charcoal | (type / bucket weight) | mixed | 53 kg | |||||||
| unknown tropical / oak / maple | 2.0 | 8 kg | ||||||||
| oak (no weight, estimate) | e 1.8 | 39.6 kg | ||||||||
| maple (rough only) | e 1.8 | 5.5 kg | ||||||||
| ELAPSED | RATE | EVENT | AIR | CHARCOAL | ||||||
| UNIT | ||||||||||
| CLOCK | pressure | LpM | bucket | ORE | ||||||
| psi | COUNT | TOTAL | Unit | TOTAL | ||||||
| kg | kg | kg | ||||||||
| 1200 | (work starts) | |||||||||
| 1256 | start wood splints pre-heat | |||||||||
| extended drying required | ||||||||||
| 1513 | gentle air | 100 | ||||||||
| 1523 | 44277 | addition first rough charcoal (maple) | 600 | 1 | 1 | 1.8 | ||||
| 1200 | start smelt sequence | |||||||||
| 1204 | fill with rough charcoal | 2 | 3 | 5.4 | ||||||
| 1213 | start graded (mixed types) | 1 | 4 | 7 | ||||||
| 1221 | increase air | 800 | ||||||||
| 1224 | probe to settle | |||||||||
| 1229 | 16 | top of column ignites | 1 | 5 | 9 | |||||
| 1243 | 14 | 1 | 6 | 11 | ||||||
| 1256 | 13 | 1 | 7 | 13 | ||||||
| 1312 | 16 | shift to oak charcoal | 1 | 8 | 15 | |||||
| 1315 | start addition of tap slag | |||||||||
| 1327 | 15 | 1 | 9 | 16.8 | 1 S | 1 S | ||||
| 1338 | 11 | 1 | 10 | 19.6 | 1 S | 2 S | ||||
| 1342 | start addition of gromps | |||||||||
| 1350 | 12 | 1 | 11 | 21.4 | 1 G | 1 | ||||
| 1359 | 9 | 1 | 12 | 23.2 | 1 | 2 | ||||
| 1407 | 8 | 1 | 13 | 25.0 | 1 | 3 | ||||
| 1416 | 9 | 1 | 14 | 26.8 | 1 | 4 | ||||
| 1426 | 10 | 1 | 15 | 28.6 | 1 | 5 | ||||
| 1435 | 9 | 1 | 16 | 30.4 | 1 | 6 | ||||
| 1447 | 12 | 1 | 17 | 32.2 | 1 | 7 | ||||
| 1456 | 9 | 1 | 18 | 34.0 | 1 | 8 | ||||
| 1507 | 11 | 1 | 19 | 35.8 | 1 | 9 | ||||
| 1522 | 15 | 1 | 20 | 37.6 | 1 | 10 | ||||
| 1535 | 13 | 1 | 21 | 39.4 | 1 | 11 | ||||
| 1549 | 14 | probed to determine bowl shape | 1 | 22 | 41.2 | 1 | 12 | |||
| 1604 | 15 | 1 | 23 | 43.0 | 1 | 13 | ||||
| 1610 | probed to detrmine bowl shape | |||||||||
| 1615 | 11 | 1 | 24 | 44.8 | 1 | 14 | ||||
| 1620 | open base, tapped to lower bowl ? | |||||||||
| slag found extremely thick | ||||||||||
| 1643 | 28 | adjust to lower shaft to 40 / stack 25 | 1 | 25 | 46.6 | 1 | 15 | |||
| 1703 | tuyere rodgered clear | |||||||||
| 1706 | 23 | 1 | 26 | 48.2 | 1 | 16 | ||||
| 1722 | 16 | 1 | 27 | 50.0 | 1 | 17 | ||||
| 1732 | 10 | attempt to lower slag bowl | 1 | 28 | 51.8 | 1 | 18 | |||
| start burn down | ||||||||||
| one last bucket to cover | 1 | 29 | 53.6 | |||||||
| TOTALS | ||||||||||
| Charcoal | (estimate) | 54 | kg | |||||||
| Gromps | 18 | kg | ||||||||
| Bloom | large pieces after sectioning | 11.1 | kg | |||||||
| Yield | (after cut to rough 1/3rds) | 62% | ||||||||
| Gromps | also recovered | 1.8 | kg | |||||||
| cast iron fragments recovered | 584 | gm | ||||||||
| Condition | crumbly | |||||||||
| Quality | sparks like 1095 | |||||||||