· Medio Ambiente ·
Yasufumi YAMAGUCHI, Shoji KIGUCHI and Hirotoshi Murata
Faculty of Science and Engineering, Kinki University;Naniwa Roki Co.,Ltd. 67th WFC
In the foundry industry, the price of coke rose greatly as well as the
inflationary prices of a recent raw material in these 1 or 2 years. As a
result, it is greatly influenced that the manufacturing cost increases, the
decrease in the competitive edge of the product and the decrease in rate
of profit.
Therefore, it is required to use a cheap material to decrease the ratio of
coke even a little. So far, it has been much reported that the cheaper
smokeless coal or inferior coke is used. However, these inferior materials
can cause trouble in casting defect and in cupola operation.
In this study, it paid attention from effective use of the earth resource and
the viewpoint of environmental problems to a woody biomass. There are
advantages to use the woody biomass that it is easy in the global
environment because of the manufacture cost reduction and control of
generation of carbon dioxide.
Therefore, it is investigated to make the woody biomass a coke
substitution material that manufacturing condition to make the carbonizing
woody biomass like briquette, the material characteristic and the
combustion process.
As a result, the compression stress of the carbonizing woody biomass is
100 MN/m2. This value is very hard compared with compression stress
18.7 MN/m2 of the foundry coke. The calorific density of the carbonizing
woody biomass is 21.0 MJ/kg against calorific density 28.9 MJ/kg of coke.
This value is an enough calorific value to alternate the coke. In fact, coke
and the carbonizing woody biomass were burnt in the carbon crucible. As
a result, the heat temperature of the woody biomass is equal to coke in the
carbon crucible.
