EVENT Date 13-Oct-24
Description Pulsing Air Test
Goal Compare with previous 2 tests
Team Darrell Markewitz lead
Neil Peterson extract
Neil measures
Tyler Hinkey ore
Daniel Khan Hefnier charcoal
Tyler hammer
Daniel hammer
hammer
Darrell records
Darrell / Neil photos
FURNACE Type short shaft on plinth (partial re-use)
Material broken furnace / manure cobb / block
Walls (base / top) 5 +
OD (base / top) 33 +
ID (base / top) 23
at tuyere 23
Height 61
Stack (tuyere to top) 43
Base 18
Plinth (material / height) 19
Packing charcoal fines Y
Tuyere (type / shape) copper
ID 2.5
Mounted (type) insert
Angle 22
Distance (gap / proud)  5
Air System electric blower via sliding gate
Extraction bottom
MATERIALS Ore 1 Ore 1 (type / weight) DD1 (% Fe)
Ore 2 Ore 2 (type / weight)
Tap Slag Tap Slag (weight) 3
Gromps Gromps (weight)
Charcoal Charcoal (type / bucket weight) - ash / oak 1.57 1.8?
CLOCK ELAPSED BURN EVENT AIR CHARCOAL ORE
min/kg UNIT COUNT TOTAL Unit TOTAL
pressure LpM bucket kg kg kg
psi 1.8
835 start wood splints pre-heat
1125 170 equipment fail / modifications
1130 2/3 fill with rough charcoal (oak) 600 2 2 3.60
1132 fill with rough charcoal 1 3 5.40
air gate repairs, gate mostly open 800
1218 new drive, adjusted to 1 / sec 1000 0.00
(charcoal count uncertain)
1220 48 sequence resumes 1 4 7.20
1226 short electrical disconnect
1228 top touches off - start graded (ash)
1235 repair tight linkage problem
1245 25 14 1 5 8.77
1308 23 13 1 6 10.34
1325 poked to settle
1332 24 13 1 7 11.91
1336 start first slag addition
1402 30 17 1 8 13.48 1S 1S
1433 31 17 1 9 15.05 1S 2S
1500 27 15 1 10 16.62 1S 3S
1536 36 20 1 11 18.19 1 1
1620 44 24 1 12 19.76 1 2
1639 19 11 1 13 21.33 1 3
1715 36 20 1 14 22.90 1 4
1749 24 13 1 15 24.47 1.5 5.5
1827 38 21 1 16 26.04 1.5 7
1906 39 22 1 17 27.61 2 9
1915 major blockage of tuyere
1930 dropped slag bowl, angle to 15 down
1942 36 20 1 18 29.18 2 11
2020 38 21 1 19 30.75 2 13
last ore addition (time error?) 1 20 32.32 2 15
2105 ? set steel pipe tuyere ID 4 cm, angle 15 0.75 20.75 33.50
start burn down
2115 start extraction
2148 finish compaction
TOTALS
Charcoal 34 kg
Ore 15 kg
tap slag added 3 kg
gromps added
Bloom 3302 (2361 + 941) kg
Gromps
Yield 22 %
Condition large, typical cupped / dense 
Quality small, high slag