Oxygen Enrichment and Oil Injection in Blast Furnaces at Wakayama Steel Works

Abstract

Operation data of the blast furnaces at Wakayama Steel Works were analyzed.
Under insufficient heat compensation, the increase of fuel oil results in the decrease of direct reduction, and replacement coefficient is lowered. In this case, top gas ratio, CO/CO2 decreases with the increase of ratio ore/coke, and the decrease of CO/CO2 results in prevention of the decrease of replacement coefficient. It seems, however, that the top gas ratio is limited to certain value.
The oxygen atomized burner were used at Wakayama No 2BF. Much quantity of heavy oil was burned successfuly even under the condition of oxygen excess coefficient (μ) 1.0.(in the case of ordinary type, minimum μ=1.5)