EVENT Date October (31) 2020
Description Icelandic stone block
Goal 65 for 65' large volume smelt
Team Darrell Markewitz
Neil Peterson
Rey Cogswell
Bram Porter
stricker Richard Schwitzer
photos+ Kelly Probyn-Smith
FURNACE Type Norwegian / Icelandic
Material granite block, clay fill
Interior 25
Height 100
Stack 70
Base 15
Packing wood ash 15
Tuyere standard copper
Diameter 2
Angle -22.5
Proud 2
Air System standard electric blower
Extraction dismantle to tuyere level
MATERIALS Ore Lexington / hematite / DD1
Charcoal Oak
CLOCK ELAPSED EVENT AIR CHARCOAL ORE
actual UNIT COUNT TOTAL Unit TOTAL
pressure LpM bucket kg kg kg
psi 1.85
7:35 start wood splints pre-heat
9:03 1:28 gentle air 
9:12 25 increase air 200
9:29 seal arch
9:35 start adding ungraded (maple) 1 1
9:39 T 2:04 fill with ungraded 800 4 5
9:46 probed to settle
9:51 probed to settle 1 6 11.10
10:00 probed to settle 1 7 12.95
10:11 probed to settle 900 1 8 14.80
tape over plate air leak
10:24 13 mixed maple / oak 1 9 16.65
10:30 T : 51 top ignition
main sequence start
10:35 11 oak  1 10 18.50
10:44 9 start slag additions 1 11 20.35
10:55 11 1 12 22.20 1 S 1 S
11:07 12 1 13 24.05 1 S 2 S
11:18 11 total 3 kg (6.5 lbs) iron slag 1 14 25.90 1 S 3 S
11:29 11 (poor) Virginia Limonite 1 15 27.75 1 L 1
11:39 10 1 16 29.60 1 L 2
11:50 11 1 17 31.45 1 L 3
12:03 13 1 18 33.30 1.5 L 4.5
12:14 11 1 19 35.15 1.5 L 6
12:26 12 .5 Limonite + 1 Hematite grit 1 20 37.00 1.5 7.5
12:37 11 1 21 38.85 1.5 H 9
12:50 13 1 22 40.70 1.5 H 10.5
13:03 13 1 23 42.55 1.5 H 12
13:15 12 .5 Hematite + 1.5 Analog 1 24 44.40 2 14
13:28 13 .5 Hematite + 1.5 Analog 1 25 46.25 2 16
13:40 12 all Analog 1 26 48.10 2 18
13:54 14 1 27 49.95 3 21
14:07 13 1 28 51.80 2 23
14:20 13 1 29 53.65 3 26
14:32 12 1 30 55.50 2 28
14:46 14 1 31 57.35 3 31
14:58 12 1 32 59.20 3 34
15:13 15 1 33 61.05 3 37
15:25 12 1 34 62.90 2 39
15:38 13 1 35 64.75 3 42
15:51 13 2.5 Analog + .5 Limonite 1 36 66.60 3 45
16:02 13 Gromps 1 37 68.45 1.5 46.5
16:15 13 1 38 70.30 1.5 48
16:30 15 1 39 72.15 1.5 49.5
16:42 12 1 40 74.00 2 51.5
16:54 12 Limonite 1 41 75.85 3 54.5
17:08 14 1 42 77.70 3 57.5
17:23 15 1 43 79.55 3 60.5
17:37 14 1 44 81.40 3 63.5
17:50 13 1 45 83.25 1.5 65
18:02 12 last charcoal to cover 1 46 85.10
start burn down
start extraction
TOTALS
Charcoal 85 kg
Ore plus 3 kg tap slag 65 kg
Bloom 15.9 kg
Gromps included in ore weight kg
Yield 24 %
Condition
Quality