| 摘要 |
<p>PURPOSE:To improve the using efficiency of soot and to facilitate the production of sponge iron briquette by removing and recovering the soot sticking to the surface of sponge iron for preventing the development of cluster in a shaft furnace by inert gas recycling having a dust remover at the time of producing the sponge iron by reducing iron ore in the shaft furnace. CONSTITUTION:The granular iron ore 1 is charged in the shaft furnace 2 and by blowing the high temp. reducing gas generating from a reducing gas generator 7 from a tuyere 14 to produce the sponge iron 1a by solid reduction of the iron ore. In this case, the soot generated by incompletely burning the natural gas in a soot generator 20, is blown in the furnace from the tuyere 14, to prevent the development of cluster by sticking to the surface of iron ore. The sponge iron with soot stuck to the surface is flowed down from the upper inlet of lower discharging hopper 15b and then, by blowing N2 gas of N2 gas recycling piping 23 having the dust remover 25 from a nozzle 21a, the soot on the sponge iron surface is removed and recovered by the dust remover 25, to be reutilized in the shaft furnace. The sponge iron after removing the soot is easily made into briquette by a briquette machine.</p> |
