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平炉用氧后,相当于“卧式转炉”,它既不同于重油平炉,也不同于转炉。在顶吹氧平炉里,钢中的氧同样具有参与传质和传热的双重作用。在冶炼中,降碳速度得到充分保证,但燃料燃烧热及氧化热得不到充分利用,废气和炉体散热约占整个热平衡的40～45％。转炉却完全靠碳、硅氧化放热(占70％)来加热金属至终点温度。平炉前四道工序(补炉、加料、加热、兑铁水)完全依赖于燃料。随着平炉大量用氧以后,平炉原有的矿石沸腾
Open hearth with oxygen, the equivalent of “horizontal converter”, which is different from heavy oil furnace, but also different from the converter. In the top blowing oxygen furnace, the oxygen in the steel also has the dual role of participating in mass transfer and heat transfer. In the smelting, carbon reduction speed is fully guaranteed, but the fuel combustion heat and oxidation heat are not fully utilized, exhaust and furnace heat dissipation accounts for about 40 ~ 45% of the entire heat balance. The converter is entirely carbon, heat of silicon oxidation (70%) to heat the metal to the end temperature. The first four steps of open hearth (make-up, feed, heat, hot metal) depend entirely on the fuel. With a large number of open hearth with oxygen, open hearth original ore boiling