| 摘要 |
<p><PICT:0983844/C6-C7/1> Iron, particularly phosphorus-bearing iron, is refined or converted into steel with oxygen in a tandem reactor process by treating a bath of the molten iron in a reactor A by injecting at least part of the oxygen required for refining as a stream 3, e.g. from a lance POL, from one end of the reactor at an acute angle, e.g. between 35 and 50 degrees, to the bath surface and with such high velocity, e.g. 1.2-3 mach, that the stream is finely dispersed within the bath without striking the bottom, the resultant hot gases passing from the reactor A at its other end into a second reactor B to preheat, melt and control the temperature of input material, such as pig iron, scrap, ores, coolants, fluxes and slag formers, charged into the reactor B whilst refining is effected in reactor A. After tapping the refined or converted material in reactor A, the process is reversed by refining or converting the material in reactor B in like manner with oxygen and passing the resultant hot gases into reactor A which is being charged with fresh input material. Additional oxygen or air may be injected, e.g. through auxiliary lance b (or a, in reversed process), into the other reactor to burn CO in the hot effluent gases to CO2 to cause a further increase in the temperature of the input material; for reducing the temperature, steam, nitrogen, argon or other neutral gas may be introduced. At least one of the reactors may be operated with negative pressure.</p> |
