公开(公告)号：US06423115B1

公开(公告)日：2002-07-23

申请号：US09478750

申请日：2000-01-06

申请人： Carolyn McCarthy ,  Rodney James Dry ,  Peter Damian Burke ,  Robin John Batterham

发明人： Carolyn McCarthy ,  Rodney James Dry ,  Peter Damian Burke ,  Robin John Batterham

IPC分类号： C21B1100

CPC分类号： C21B13/0026 ,  C21B11/00 ,  C21B13/0013 ,  Y02P10/136

摘要： A direct smelting process for producing metals from a metalliferous feed material is disclosed. The process includes forming a molten bath having a metal layer (15) and a slag layer (16) on the metal layer in a metallurgical vessel, injecting metalliferous feed material and solid carbonaceous material into the metal layer via a plurality of lances/tuyeres (11), and smelting metalliferous material to metal in the metal layer. The process also includes causing molten material to be projected as splashes, droplets, and streams into a top space above a nominal quiescent surface of the molten bath to form a transition zone (23). The process also includes injecting an oxygen-containing gas into the vessel via one or more than one lance/tuyere (13) to post-combust reaction gases released from the molten bath, whereby the ascending and thereafter descending splashes, droplets and streams of molten material in the transition zone facilitate heat transfer to the molten bath, and whereby the transition zone minimises heat loss from the vessel via the side walls in contact with the transition zone. The process is controlled by maintaining a high slag inventory and by reducing the heat loss from the vessel through the side walls being continuously splashed by the transition zone.

摘要翻译： 公开了一种用于从含金属进料中生产金属的直接熔炼方法。 该方法包括在冶金容器中在金属层上形成具有金属层（15）和熔渣层（16）的熔池，通过多个喷枪/风口将含金属进料和固体含碳材料注入金属层（ 11），并将含金属材料熔炼到金属层中的金属。 该过程还包括使熔融材料作为飞溅，液滴和流投射到熔融浴的标称静止表面上方的顶部空间中以形成过渡区（23）。 该方法还包括通过一根或多于一根的喷枪/风口（13）将含氧气体注入到容器中，以便将从熔融浴释放的反应气体后燃烧，由此上升和随后下降的熔融液滴和液流 过渡区域中的材料促进热量传递到熔池，并且由此过渡区域最小化与过渡区域接触的侧壁从容器的热损失。 该过程通过保持高渣量库存并通过减少由过渡区域连续飞溅的侧壁的船舶的热损失来控制。