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在不妨碍冲天炉熔炼效果的条件下,为了提高其热效率,开发了向熔化带附近输入流体燃料燃烧气的新式炉及其操作方法。其结果,即使焦炭比为6～7%,耗煤油量为30～35升/小时·吨的条件下,出铁温度可达1350℃以上,熔化效率超过40%。另外,熔化的金属液质量与以往冲天炉熔化的金属液比较,也能保持在足够的水平上。另外,采用此种操作方法,硫、氮的氧化物及灰尘的排出量也可显著地降低。
In order not to hinder the cupola melting effect conditions, in order to improve its thermal efficiency, developed into the vicinity of the melting zone into the fluid fuel combustion gas furnace and its operation method. As a result, even when the coke ratio is 6 to 7% and the kerosene amount is 30 to 35 liters / hour · ton, the tapping temperature can reach 1,350 ° C or higher and the melting efficiency exceeds 40%. In addition, the quality of molten metal molten metal cup and the previous cupola melting compared to, but also can be maintained at a sufficient level. In addition, with this method of operation, sulfur, nitrogen oxides and dust emissions can also be significantly reduced.