EVENT Date September (4) 2021
Description Hals Icelandic Phase 3 B
Goal simulated Icelandic clay mix- reuse
Team Dave Cox (M)
Neil Peterson
Rey Cogswell (extraction)
Marcus Burnham
Richard Schwitzer (hammer)
records Darrell Markewitz
FURNACE Type Icelandic turf build
Material Wareham sod / Icelandic clay
Walls cylinder / clay+sand+horse 4.5
Interior 28
Height 70
Stack 43
Base 30
Packing charcoal fines 16
Tuyere standard copper
Diameter 2
Angle -22.5
Proud 5
Air System standard electric blower
Extraction bottom via arch
MATERIALS Ore DD 1 (red) 51% Fe
Charcoal Oak 1.97 kg
CLOCK ELAPSED EVENT AIR CHARCOAL ORE
UNIT COUNT TOTAL Unit TOTAL
meter to LpM LpM bucket kg kg kg
1.97
845 start wood twigs pre-heat
910 start gentle air 100
1007 T 1:27 start fill ungraded
1011 filled, full air blast 700 4 4 7.9
1015 air increase 900 1 5 9.9
1024 9 900 1 6 11.8
1034 10 1 7 13.8
1044 10 graded charcoal 1 8 15.8
1056 12 poked to settle 1 9 17.7
1104 8 1 10 19.7
1114 10 1 11 21.7
1119 first addition tap slag
air meter 11.5 864
1123 9 reduce air 552 700 1 12 23.6 1 S 1 S
1135 12 1 13 25.6 1 S 2 S
1150 15 1 14 27.6 1 S 3 S
1155 high slag bowl, vertical probe to drop
1200 10 air increase 800 1 15 29.6 .33 S 3.3 S
1212 burn through - above tuyere
1216 16 1 16 31.5 1 S 4.3 S
1222 probe to drop 8.8 660
1225 probe to drop
1231 15 first ore addition 1 17 33.5 1 O 1 O
1236 increase air 900
1244 13 open arch, rake - to drop bowl 9.6 720 1 18 35.5 1 2
1257 13 1 19 37.4 1 3
1306 9 1 20 39.4 1 4
1317 11 1 21 41.4 1.5 5.5
1330 13 1 22 43.3 1.5 7
1342 12 1 23 45.3 1.5 8.5
1354 12 1 24 47.3 2 10.5
1402 8 1 25 49.3 2 12.5
1415 13 1 26 51.2 2 14.5
1426 11 1 27 53.2 2 16.5
1435 9 1 28 55.2 2 18.5
1446 11 1 29 57.1 3 21.5
1500 14 uncertain time 1 30 59.1 3 24.5
1507 9 with above 1 31 61.1 1.5 26
start burn down
1515 8 remainder slag 1 32 63.0
NR 1 33 65.0
start extraction
TOTALS
Charcoal 65 kg
Ore 26 kg
iron slag added 4.3 kg
Bloom 8.2 kg
Gromps
Yield 32 %
Condition spongy looking, additional slag
Quality
Slag  all left in place as erosion
Main sequence time 1231 1507 156 minutes
Charcoal rate 27.6 5.7 MpK
Ore rate 26 6.0 MpK