| EVENT | Date | October (30) 2021 | |||||||||
| Description | Standard Short Shaft on plinth | ||||||||||
| Goal | Long term erosion / air volume tests | ||||||||||
| Team | Darrell Markewitz | ||||||||||
| Neil Peterson (extracts) | |||||||||||
| Richard Schwitzer | |||||||||||
| FURNACE | Type | standard with taller shaft | |||||||||
| Material | EPK | ||||||||||
| Walls | cylinder / clay+sand+horse | 6 to 3 | |||||||||
| Interior | 28 | ||||||||||
| Height | 77 | ||||||||||
| Stack | 50 | ||||||||||
| Base | 15 | ||||||||||
| Packing | charcoal fines | 13 | |||||||||
| Tuyere | standard copper | ||||||||||
| Diameter | 2 | ||||||||||
| Angle | 20 | ||||||||||
| Proud | 4 | ||||||||||
| Air System | standard electric blower + smelt bellows | ||||||||||
| Extraction | bottom via arch | ||||||||||
| MATERIALS | Ore | DD 1 (red) | 51% Fe | ||||||||
| Charcoal | Oak | ||||||||||
| EVENT | AIR | CHARCOAL | ORE | ||||||||
| CLOCK | ELAPSED | UNIT | COUNT | TOTAL | Unit | TOTAL | |||||
| pressure | LpM | Gauge | Total | bucket | kg | kg | kg | ||||
| inch H2O | plate | flow | volume | 1.9 | |||||||
| 1200 | start wood splints pre-heat | ||||||||||
| 1230 | 30 | gentle air | - | ||||||||
| 1340 | T 1:40 | start rough charcoal | 3 | 800 | 3 | 3 | 5.7 | ||||
| 1348 | 8 | start computer recording | 11.4 | 655 | 1 | 4 | 7.6 | ||||
| 1352 | probe to settle | 11.4 | 653 | 1 | 5 | 9.5 | |||||
| temps | A - 1170/930/780/550/320/250 | ||||||||||
| 1402 | B - 1180/1030/1190/800/780/610 | ||||||||||
| 1405 | 13 | last rough / probed to settle | 3.3 | 11.4 | 656 | 1 | 6 | 11.4 | |||
| 1417 | 12 | switch to graded charcoal | 11.4 | 655 | 1 | 7 | 13.3 | ||||
| 1430 | 13 | 11.4 | 656 | 1 | 8 | 15.2 | |||||
| temps | A - 1135/1040/840/800/650/460 | ||||||||||
| 1439 | B - 1180/1030/1190/800/780/610 | ||||||||||
| 1445 | 15 | 11.4 | 657 | 1 | 9 | 17.1 | |||||
| 1458 | 13 | 11.5 | 659 | 1 | 10 | 19.0 | |||||
| 1459 | start bellows - Richard (1500.30) | 9.4 | 541 | ||||||||
| 1505 | start bllows - Neil (1506.30) | 2.5 to 3 | 8.5 | 491 | |||||||
| 1510 | start bellows - Darrell (1511.30) | 8.3 | 477 | ||||||||
| ( return to blower) | |||||||||||
| 1512 | return to blower /increased (varies) | 4 | 900 | 12.8 | 735 | ||||||
| 1515 | 17 | effect of bellows use? | 14 | 802 | 1 | 11 | 20.9 | ||||
| 1521 | temps | A - 1210/1190/1190/1000/905/715 | |||||||||
| B - 1315/1350/ overload problem | |||||||||||
| 1531 | 16 | 13.9 | 798 | 1 | 12 | 22.8 | |||||
| 1544 | 13 | start addition of iron slag | 13.8 | 793 | 1 | 13 | 24.7 | .75 S | .75 S | ||
| 1600 | 16 | 13.8 | 793 | 1 | 14 | 26.6 | .75 S | 1.5 S | |||
| 1613 | 13 | start addition of ore | 13.8 | 791 | 1 | 15 | 28.5 | 1 O | 1 O | ||
| 1629 | 16 | 13.8 | 794 | 1 | 16 | 30.4 | 1 | 2 | |||
| 1644 | 15 | 4 | 13.8 | 794 | 1 | 17 | 32.3 | 1 | 3 | ||
| 1658 | 14 | 4.5 | 13.8 | 791 | 1 | 18 | 34.2 | 1 | 4 | ||
| 1705 | bellows - Richard (1706.30) | 2 to 4 | 9.6 | 549 | |||||||
| 1709 | bellows - Neil (1710.30) | 2 to 3.5 | 9.7 | 559 | |||||||
| 1712 | bellows - Darrell (1712.30) | 2 to 3 | 9.4 | 542 | |||||||
| 1713 | return to blower / increased (1713.40) | 5 | 1000 | 16.1 | 924 | ||||||
| 1716 | 18 | temp A bottom only 1280 | 15 | 860 | 1 | 19 | 36.1 | 1 | 5 | ||
| 1729 | 13 | 14.6 | 840 | 1 | 20 | 38.0 | 1.5 | 6.5 | |||
| 1737 | first slag tap (no visible air change) | ||||||||||
| 1742 | 13 | 14.6 | 839 | 1 | 21 | 39.9 | 1.5 | 8 | |||
| 1755 | 13 | 14.6 | 837 | 1 | 22 | 41.8 | 1.5 | 9.5 | |||
| 1802 | slag tap (no visible air change) | ||||||||||
| 1806 | 11 | 14.6 | 840 | 1 | 23 | 43.7 | 1.5 | 11 | |||
| 1821 | 15 | 14.5 | 834 | 1 | 24 | 45.6 | 2 | 13 | |||
| 1835 E | 14 E | 14.5 | 833 | 1 | 25 | 47.5 | 2 | 15 | |||
| 1849 | 14 E | large self tap (no visible air change) | 14.4 | 828 | 1 | 26 | 49.4 | 2 | 17 | ||
| 1900 | 11 | 14.5 | 835 | 1 | 27 | 51.3 | 2 | 19 | |||
| 1916 | 16 | 14.4 | 829 | 1 | 28 | 53.2 | 2 | 21 | |||
| 1920 | major self tap (no visible air change) | 6 | |||||||||
| 1929 | 13 | 5 | 13.1 | 758 | 1 | 29 | 55.1 | 2 | 23 | ||
| 1940 | 11 | final addition of ore | 14.5 | 833 | 1 | 30 | 57.0 | 1.3 | 24.3 | ||
| 1944 | bellows - Richard (1944.15) | 1 to 3 | 9.3 | 532 | |||||||
| 1945 | bellows - Neil (1946.00) | 2 to 3 | 8.5 | 487 | |||||||
| bellows - Darrell 1947.45) | 8.7 | 501 | |||||||||
| 1948 | 8 | start burn down | 5 | 1000 | 14.8 | 851 | 1 | 31 | 58.9 | ||
| 2000 | reduce air (2000.30) | 3 | 800 | 11.1 | 640 | ||||||
| 2008 | reduce air (2009.19) | 2 | 700 | 7.3 | 421 | ||||||
| 2020 | additional charcoal to cover | 6.9 | 396 | 0.5 | 31.5 | 59.9 | |||||
| start extraction | |||||||||||
| air reduced (2048.14) | 200 | 4.1 | 236 | ||||||||
| TOTALS | |||||||||||
| Charcoal | total | 60 | kg | ||||||||
| average : minutes per kg | 8 | ||||||||||
| Ore | total | 24.3 | kg | ||||||||
| average : minutes per kg | 9 | ||||||||||
| iron slag added | 1.5 | kg | |||||||||
| Bloom | 7.6 | kg | |||||||||
| Gromps | |||||||||||
| Yield | 31 | % | |||||||||
| Condition | a bit spongy | ||||||||||
| Quality | |||||||||||
| Slag | all left where deposited | kg |