Abstract
In Japan, 4-5 sets of blast furnaces, using charcoal as fuel and reduc-ing agent, produces about 40, 000 t of special pig iron, that is charcoal pig iron, which needs about 24, 000t of charcoal aunually.A great amount of charcoal used for special pig iron is the domestic one, which needs no special properties.However, the anthor describes its desirable properties for the charcoal blast furnaec together with its behavi-our in the blast furnace.
