SYSTEM FOR PREPARING GAS FUEL FOR BLAST FURNACE Russian patent published in 1998 - IPC

FIELD: ferrous metallurgy. SUBSTANCE: system contains fuel gas, inert gas, and oxygen pipelines, collecting canal with pipelines to supply gas into air lances and, and mixing chamber. Pipelines are provided with locking, protecting, measuring, and controlling facilities. Mixing chamber contains, perpendicularly to its longitudinal axis, tube with blind end and discharge openings in the wall connected with oxygen pipeline. Inlet port of mixing chamber is connected with fuel gas pipeline, and outlet port with collecting canal, proportion of areas of these ports to chamber cross-section area being respectively 0.05 to 0.5 and 0.005 to 0.35. Tube walls in the mixing chamber oriented against and in direction of gas travel in chamber are solid and define tube sectors with angles 20-120 and 60-120 deg., respectively, and diameter of tube is 0.2-0.8 chamber cross-section. EFFECT: facilitated gas supply operation. 2 cl, 3 dwg