Abstract: The present invention relates to a method and a fluid injection device for quick replacement, even in the red hot conditions, in a metallurgical reactor. The method comprises the external extraction of the injection device which is composed of an inner extractable blowing element and wear resistant block, element the blowing element secured in the wear resistant block and forming together the injection device. The quick interchange is first performed by extracting the inner blowing element, then installing a special extractor device in the space where the blowing element was and then extracting the wear resistant block by applying a force, in the opposite direction of the gas flow, through the bottom end of the extractor device. The extractor device has a special design so, when a force is applied at its bottom end, an expansive occurs at the upper end making the external extraction of said wear resistant block easier.

Abstract: A mechanism and flow conduits for introducing and transporting a set of separated fluids and a stream of solid fines through passageway in a rotating metallurgical converter for introducing such fluids and solid fines into a liquid metal contained in the converter.Stationary conduits from flow sources connect to a non rotative sleeve which forms the external portion of a rotary joint able to introduce a set of separated fluids into the rotating converter passageways. Each separated stationary fluid conduit connects to port holes in the fixed sleeve to lead the flow to the interior of the sleeve, and connects a circumferential channel formed in rotating rings located between a rotating shaft affixed to the converter vessel trunnion pin and the static sleeve with a seal between each adjacent ring and corresponding channel. A port hole is located in each rotating channel ring for leading the fluid through internal flow paths inside and along the axis of the shaft body.

Abstract: This invention relates to a device used in the selection between two fluids that are to be injected into a liquid metal contained in a metallurgical converter: an oxidizing gas and another gas conveying powdered carbonaceous material; both fluids arrive through different conduits to a selecting valve located at the bottom of a metallurgical converter just before a single conduit tuyere for leading one of the fluids to the liquid metal by means of the selective mechanism in such valve.