Abstract: An apparatus for injecting gas into a metallurgical vessel is disclosed. The apparatus comprises a gas flow duct, an elongate central tubular structure extending within the gas flow duct, a plurality of flow directing swirl vanes, inflow and outflow cooling water passages within the central structure, and a nose portion provided with one or more water cooling passages. The flow directing vanes are provided with internal water cooling vane passages. In use, water flow is communicated through the vane passages from the water inflow passage in the central structure to the water flow passage in the nose portion of the central structure such that at least some of the inflowing water will pass successively through the vane passages and the nose passage or passages and thence to the outflow passage.

Abstract: An apparatus for injecting gas into a metallurgical vessel supporting a metallurgical process is disclosed. The apparatus includes a gas flow duct, an elongate central structure extending within the gas flow duct, and a plurality of flow directing swirl vanes disposed about the central tubular structure adjacent the forward end of the duct. The flow directing vanes are formed with internal water flow passages for flow of cooling water internally along each vane. The elongate central structure is formed with a cooling water supply passage for supply of cooling water to the internal water flow passages in the vanes and a water return passage for outflow of cooling water which has passed through the internal water flow passages in the vanes.

Abstract: An apparatus for injecting gas into a metallurgical vessel is disclosed. The apparatus comprises a gas flow duct, an elongate central tubular structure extending within the gas flow duct, a plurality of flow directing swirl vanes, inflow and outflow cooling water passages within the central structure, and a nose portion provided with one or more water cooling passages. The flow directing vanes are provided with internal water cooling vane passages. In use, water flow is communicated through the vane passages from the water inflow passage in the central structure to the water flow passage in the nose portion of the central structure such that at least some of the inflowing water will pass successively through the vane passages and the nose passage or passages and thence to the outflow passage.

Abstract: An apparatus for injecting gas into a metallurgical vessel supporting a metallurgical process is disclosed. The apparatus comprises a gas flow duct, an elongate central structure extending within the gas flow duct, and a plurality of flow directing swirl vanes disposed about the central tubular structure adjacent the forward end of the duct. The flow directing vanes are formed with internal water flow passages for flow of cooling water internally along each vane and the elongate central structure is formed with a cooling water supply passage for supply of cooling water to the internal water flow passages in the vanes and a water return passage for outflow of cooling water which has passed through the internal water flow passages in the vanes.