The concentration and chemical bonding state of carbon in direct-reduced iron (DRI) might affect DRI melting temperature and rate. The effects of carbon bonding state and concentration were evaluated with high-temperature confocal microscopy, differential scanning calorimetry, and by monitoring the carbon monoxide generation rate from reaction between DRI pellets and a laboratory slag-steel melt. In industrial steelmaking, DRI melting is likely controlled by heat transfer; the concentration and bonding state of carbon play secondary roles.

中文翻译：

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碳键状态对直接还原铁的熔化影响很小

直接还原铁 (DRI) 中碳的浓度和化学键状态可能会影响直接还原铁 (DRI) 的熔化温度和速率。通过高温共聚焦显微镜、差示扫描量热法和监测 DRI 球团与实验室钢渣熔体之间反应的一氧化碳生成速率，评估了碳键合状态和浓度的影响。在工业炼钢中，直接还原铁熔炼可能受传热控制；碳的浓度和键合状态起次要作用。