ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Gasification Rate Analysis of Unburnt Pulverized Coal in Blast Furnace
Yuji Iwanaga
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1991 Volume 31 Issue 5 Pages 500-504


Some fundamental experiments were carried out concerning the combustion reaction of PC (Pulverized Coal) blown into the tuyeres of a blast furnace and the effects of resultant unburnt PC on in-furnace reactions. The main results obtained are as follows:
(1) The gasification reaction rate of UPC is about 7 times as fast as that of coke. The presence of H2 promotes the reaction, while CO works oppositely.
(2) As UPC (Unburnt Pulverized Coal) is gasified more quickly than lump coke, the degradation of coke in the raceway becomes less.
In this way, PC blown into the blast furnace without burning was found to be effectively consumed.

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