Abstract
As one of the methods for reducing the blast furnace coke rate, there is the technique of injection auxiliary fuels from the tuyers.
Operating problems have been encountered when injecting coal as an auxiliary blast furnace fuel. These must be overcome before coal injection will receive widespred application.
It is possible by such a simple measure as imprving the fuel oil injection equipment somewhat to obtain a slurry injection of 30wt% coal concentration; but at such a high concentration as 50wt%, the burner is liable to be clogged. It is thus necessary to contrive the injection equipment in such a way as to make the injection volumes even for all the tuyeres. By completing such an equipmene, we have been injected slurry of 50wt% coal concentration with satisfactory results.
