EVENT Date June (20) 2021
Description Hals Icelandic Phase 3 A
Goal simulated Icelandic clay mix
Team Darrell Markewitz (M)
Neil Peterson
Rey Cogswell
Kay Burnham
Richard Schwitzer
records Kelly Probyn-Smith
photos Travis Sweet
FURNACE Type Icelandic turf build
Material Wareham sod / Icelandic clay
Walls cylinder / clay+sand+horse 4.5
Interior 28
Height 75
Stack 50
Base 15
Packing charcoal fines 14
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
CLOCK ELAPSED EVENT AIR CHARCOAL ORE
UNIT COUNT TOTAL Unit TOTAL
pressure LpM bucket kg kg kg
psi 1.8
1200 start wood splints pre-heat touch
1300 T 60 fill with rough charcoal 700 3 3 5.40
1314 14 1 4 7.20
1329 15 1 5 9.00
1338 9 1 6 10.80
1352 14 1 7 12.60
1400 8 1 8 14.40
1407 T 1:07 start graded charcoal
1200 main sequence start
1205 12 1 9 16.20
1217 12 1 10 18.00
1228 11 start addition of iron slag 1 11 19.80
1245 13 1 12 21.60 1 S 1 S
1257 12 last 2/3 as slug 1 13 23.40 1 S 2 S
1310 13 1 14 25.20 1 S 3 S
1322 12 1 15 27.00 1 S 4 S
1335 13 1 16 28.80 1 S 4 S
1350 15 ore addition 1 17 30.60 1 O 1 O
1405 15 slag tap 1 29 52.20 1 2
charcoal fines removed -  lower bowl
17 E record missed 1 30 54.00 1 3
1440 17 E 1 31 55.80 1 4
1455 15 1 22 39.60 1 5
1507 12 1 23 41.40 1 6
1526 19 1 24 43.20 1 7
air increase 800
1545 19 1 25 45.00 1 8
1600 15 1 26 46.80 1 9
1613 13 1 27 48.60 1 10
1628 15 remainder slag 1 28 50.40 1 11
1644 16 1 29 52.20 1.5 12.5
1700 16 1 30 54.00 1.5 14
1715 15 1 31 55.80 1.5 15.5
1733 18 1 32 57.60 2 17.5
slag tap
17 E record missed 1 33 59.40 1.5 19
1807 17 E slag tap 1 34 61.20 2 21
1817 10 1 35 63.00 1.5 22.5
14 E record missed 1 36 64.80 1.5 24
1845 14 E slag tap 1 37 66.60 1.5 25.5
1858 13 start burn down 1 38 68.40
1930 extra to cover, at about one remains 0.5 38.5 69.30
start extraction
TOTALS
Charcoal 69 kg
Ore 25.5 kg
iron slag added 4 kg
Bloom 8.9 kg
Gromps
Yield 35 %
Condition varies, dense to fragmented
Quality
Slag  tap slag collected 7.9 kg
bowl during extraction 2.5 kg
bowl from re-set 3 kg
TOTAL 13.4 kg
INPUT 29.5 kg
OUTPUT 22.3 kg
BALANCE -7.2 kg