Bourry-box Firing

1
Klockaregården
Saltglazing kiln #1
A.
B.
C.
D.
E.
F.
G.
H.
I.
J.
K.
Primary air 70 x 130
Secondary air 70 x 130
Mouse hole 70 x 56
Lower stoke hole/door 210 x 230
Hobs (for supporting wood)
Bag wall
Flues to chimney 4 x 175 x 220
Throat arch 370/480 x 600
Chimney—height 5.300
Bottom 235 x 900; top 235 x 535
Upper stoke hole/door 210 x 230
Damper
FIG. 3
Klockaregården/
Saltglazing
kiln #2
A.
B.
C.
D.
E.
F.
G.
H.
I.
J.
K.
L.
Primary air 70 x 75
Secondary air 70 x 75
Mouse hole 70 x 75
Lower stoke hole/door 200 x 230
Hobs (for supporting wood)
Bag wall
Flues to chimney 4 x 125 x 140
Throat arch /channels 4 x 115 x 460
Chimney—height 5.000; 750—350 x 235
Upper stoke hole/door 200 x 260
Blocking ramp for primary air slippage
Damper
A.
B.
C.
D.
E.
F.
G.
H.
I.
J.
K.
L.
Primary air 70 x 75
Secondary air 70 x 75
Mouse hole 70 x 75
Lower stoke hole/door 200 x 230
Hobs (for supporting wood)
Bag wall
Flues to chimney 4 x 175 x 200
Throat arch /channels 4 x 115 x 460
Chimney— 5.500; 1.000—750 x 230
Upper stoke hole/door 200 x 260
Blocking ramp for primary air slippage
Damper & damper slot
FIG. 4 Härke-Kiln 1996
FIG. 5 Firing-schedules Kilns # 1 & 2
Loading in upper stoke hole
2—3 saltings
Damper closed
#1
#2
Preheating the kilns by a slow firing
up to 100°C on the evening before
ensures a quick and safe start of the
actual firing
TIME
1
1. Kilns # 1
2. and # 2
2
3. Bourry
box-kiln
built outside Stockholm in
2002
3
1
2
4
3
5
6
1. Kiln # 2,
2. The Härke-kiln (built in 1996) in the north of
sweden at high fire
3. Kiln # 2; strong hydrogen reduction/water ad
dition at high fire
4. Kiln # 1 beeing built in 1987
5. The Härke-kiln during a winter fire 2003
6. Peep-hole view Kiln # 2—”Body of clay—Soul
of fire” . . . .