Abstract: Apparatus for atomizing and injecting fuel into a furnace, such as a blast furnace, in which two concentric tubes form a dual passage injection apparatus, the discharge end of the outer tube extending beyond the discharge end of the inner tube to form an atomization chamber. The central passageway conducts liquid fuel to its discharge end and the annular passageway conducts an atomizing fluid to its discharge end. A spray nozzle is mounted on the discharge end of the inner tube and has a plurality of atomizing passages inclined toward the longitudinal axis of the concentric tubes whereby the liquid fuel is atomized completely within the length of the outer tube.