公开(公告)号：US06514310B2

公开(公告)日：2003-02-04

申请号：US09912533

申请日：2001-07-26

申请人： Bruno Allemand ,  Christel Champinot ,  Stéphane Melen ,  Jean-Claude Vuillermoz ,  Sabastien Flichy ,  Jacky Laurent

发明人： Bruno Allemand ,  Christel Champinot ,  Stéphane Melen ,  Jean-Claude Vuillermoz ,  Sabastien Flichy ,  Jacky Laurent

IPC分类号： C21C7072

CPC分类号： C21C5/5217 ,  C21C5/4606 ,  Y02P10/143 ,  Y02P10/216

摘要： The electric arc furnace is equipped with a supersonic injector comprising a so-called Laval nozzle arranged at a certain distance above the bath. The dimensions of the nozzle are calculated as a function of the desired flow rate of oxygen and the desired velocity of the jet, and the pressure of the oxygen at the intake of the nozzle is such that the static pressure of the jet at the exit of the injector is substantially equal to the pressure of the surrounding atmosphere. Preferably, the injector comprises an annular channel for injection of natural gas, and can be used in burner mode at the start of the melting of scrap iron. The velocity of the oxygen is then subsonic.

摘要翻译： 电弧炉配备有超音速喷射器，其包括布置在浴上方一定距离处的所谓拉瓦尔喷嘴。 喷嘴的尺寸根据期望的氧气流速和喷射的期望速度计算，并且喷嘴入口处的氧气的压力使得喷嘴出口处的喷嘴的静压力 喷射器基本上等于周围大气的压力。 优选地，喷射器包括用于喷射天然气的环形通道，并且可以在废铁熔化开始时以燃烧器模式使用。 然后氧气的速度是亚音速。