Page 536 - Dust Explosions in the Process Industries

Assessment of lgnitability 503

65) ,,GOOBERT-GREENWALD FURNACE

400 I I
1 10 TEST NUMBER 20
@ FLAME U F THE WRNACE
@ FLAME IN THE FURNACE
8 NO FLAME

Figure 7.28 Comparison of results from determination of the minimum ignition temperature of
American lycopodium by two different furnaces, dust sample dispersedin each test is 1.6 cm3 (Private
communication from Leuschke, BAM, Berlin, 1975).

-
Dispersion
receptacle
0 5 IO
Scale, crn Figure 7.29 Newer 1.2 liter US.Bureau of
Mines furnace for determination of the min-
imum ignition temperature of dust clouds
(From Conti et al., 1983).

temperature of dust clouds. Conti et al. (1983) showed that, for organic materials and
coals, the new fuirnace gave minimum ignition temperatures from 15-90°C lower than
those from the Godbert-Greenwald furnace. Closer agreement with the BAM furnace
would be expected for some dusts.