The invention belongs to the technical field of
metallurgy, and relates to an
oxygen furnace steel method capable of improving
jet velocity through preheated
oxygen. The method comprises the following steps: the
oxygen flows into a preheating
system from a normal temperature pipeline, the oxygen is preheated by high-temperature
smoke for steel making or heat generated by
electric heating or fuel
combustion system, the oxygen temperature is controlled by adjusting heat input, and the preheated oxygen is subjected to blowing steel making by utilizing supersonic jet generated by an oxygen gun spray head. The method has the characteristics that the oxygen is preheated, and the preheated high-temperature oxygen is blown by the oxygen gun, so that the
jet velocity of the oxygen is remarkably increased, the stirring effect is enhanced, the dynamics condition for reaction of a
molten bath is improved, and the service life of the oxygen gun spray head is prolonged. The oxygen furnace steel method is suitable for steel-making processes of an
electric arc furnace of 30-200 tons and a converter of 30-350 tons, in comparison with the conventional steel making process, the carbon removal speed and the
phosphorus removal speed are remarkably improved, the
smelting period is shortened by more than 2 minutes, the
metal yield is improved by more than 1%, and the
slag consumption is reduced by 10%.