Due to the recent recession in the coal tar industry in this country, Nippn Kokan K. K. naturally dicided to use economical crude tar instead of heavy oil in the blast furnace operation.
We performed test operations at No.4 B. F. Kawasaki Iron Works and achieved, as well, fundamental experiments at the research lavoratory in 1962.
The results of that test operation showed the superiority of crude tar, being less expensive than heavy oil, as an auxiliary fuel for blast furnace so far as it is used with appropriate precautions
It was therefore decided to operate with full-scale crude tar injection,
At present the crude tar injecting operation is effected on Kawasaki No.4, No.5 B. F. and Fukuyama No.1 B. F. without any trouble.
This paper presents how the operation was carried out and especially contain issues as follows:
1. Difficulties of coal tar injection
2. Equipments and their operation
