EVENT Date October (11) 2020
Description Icelandic stone block
Goal course
Team Darrell Markewitz
Bram Porter
records Darrell Markewitz
FURNACE Type Norwegian / Icelandic
Material granite block, clay fill
Interior 25
Height 100
Stack 70
Base 20
Packing charcoal fines 10
Tuyere standard copper
Diameter 2
Angle 25
Proud 5
Air System standard electric blower
Extraction bottom via arch
MATERIALS Ore DD 2 (red + 16% scale)
Charcoal Oak
CLOCK ELAPSED EVENT AIR CHARCOAL ORE
absolute UNIT COUNT TOTAL Unit TOTAL
pressure LpM bucket kg kg kg
psi 1.8
1035 start wood twig pre-heat
1043 very gentle air (green branches)
1140 increase air 250
1200 T 1:25 seal arch, charcoal to tuyere 400 1
1205 main sequence start - fill with rough 4 5 9.00
1208 air increased 800
1223 start graded fuel
1229 probed to settle 2 7 12.60
1241 12 1 8 14.40
1257 16 1 9 16.20
1306 9 1 10 18.00
1327 21 1 11 19.80
1332 15 air increased 1000 1 12 21.60
1400 28 add slag, air increased (possible +2?) 1200 1 13 23.40 1 S 1 S
1414 14 1 14 25.20 1 S 2 S
1428 14 1 15 27.00 1 S 3 S
1443 15 1 16 28.80 1 S 4 S
1457 14 first ore added (4 x 250 gm) 1 17 30.60 1 1
1510 13 1 18 32.40 1 2
1523 13 1 19 34.20 1 3
1537 14 ore increase (3 x 500 gm) 1 20 36.00 1.5 4.5
1605 28 * possible two additions * 1 21 37.80 1.5 6
1620 15 1 22 39.60 1.5 7.5
1637 13 ore increase (4 x 500 gm) 1 23 41.40 2 9.5
1650 13 1 24 43.20 2 11.5
1700 10 1 25 45.00 2 13.5
1718 18 ore increase (3 x 1000 gm) 1 26 46.80 3 16.5
1734 16 ore additions alternate 1 27 48.60 2 18.5
1748 14 1 28 50.40 3 21.5
1759 11 1 29 52.20 2 23.5
1816 17 1 30 54.00 3 26.5
1826 10 last ore addition 1 31 55.80 2 28.5
1836 10 charcoal to cover 1 32 57.60
1846 10 1 33 59.40
start burn down
TOTALS
Charcoal 59 kg
Ore plus 4 kg tap slag 28.5 kg
Bloom 5.5 kg
Gromps (recovered after cutting) 1 kg
Yield 19 %
Condition very crumbly (may be temperature)
Quality