EVENT Date August - 27 - 2023
Description Caherconnell Furnace Festival
Goal Irish Hematite ore test
Team Daniel Jeffery (lead)
Darrell Markewitz
Coilin O Dubhghail
FURNACE Type short shaft
Material Irish local clay + sand
Walls slightly oval cylinder, rounded base n/r
Interior 30 x 35
Height 69
Stack 55
Base 11
Packing ash and fines 10
Tuyere provided (5mm?) copper
Diameter 2
Angle 20
Proud 4.5
Air System provided vacuum blower
Extraction cold - bottom via arch
MATERIALS Ore Irish Hematite, roasted 41% Fe
Charcoal ash
CLOCK ELAPSED EVENT AIR CHARCOAL ORE
UNIT COUNT TOTAL Unit TOTAL
pressure LpM bucket kg kg kg
psi 1
1100 start wood splints pre-heat touch
1205 T 65 first charcoal to light 1 1 1.00
1208 fill 25% 4 5 5.00
1215 air increased
1219 11 1 6 6.00
1226 7 1 7 7.00
1234 8 1 8 8.00
1242 8 1 9 9.00
1253 11 1 10 10.00
1300 7 first ore 500 bog / 500 hematite 1 11 11.00
as 250 gm additions, spread
1306 6 1 12 12.00 1 1
1312 6 all hematite 1 13 13.00 1 2
1322 10 1 14 14.00 1 3
1329 7 1 15 15.00 1 4
1335 6 1 16 16.00 1 5
1344 9 as 3 x 500 gm 1 17 17.00 1.5 6.5
1350 6 1 18 18.00 1.5 8
1356 6 1 19 19.00 1.5 9.5
1402 6 1 20 20.00 2 11.5
1410 8 1 21 21.00 2 13.5
1416 6 1 22 22.00 2 15.5
1427 11 1 23 23.00 2 17.5
1436 9 1 24 24.00 2 19.5
1445 9 1 25 25.00 2 21.5
1452 7 1 26 26.00 2 23.5
1502 10 1 27 27.00 2 25.5
1512 10 final to cover 1 28 28.00
start burn down
no time for extraction
TOTALS
Charcoal 28 kg
Ore 25.5 kg
Bloom 1437 gm
Gromps 1025 gm
Yield 6 %
Condition fragmented, spongy
Quality
Main Sequence 122 min
Ore 4.8 min/kg
Charcoal 7.6 min/kg