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首页> 外文会议>Asia steel international conference >Improvement in Reaction Rate and Decrease in Reaction Temperature of Iron Ore-Carbon Composite by Increasing Pressure
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Improvement in Reaction Rate and Decrease in Reaction Temperature of Iron Ore-Carbon Composite by Increasing Pressure

机译：通过增加压力改善反应速率和铁矿碳复合材料反应温度的降低

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Reduction behavior of the composite of iron ore and carbonaceous materials has been studied by many researchers to use as a potential burden for suppressing CO2 emission from the ironmaking process.So far,however,its usage seems to be limited under a standard condition of the blast furnace.In this study,the effect of elevated pressure,up to 8.0MPa,on the reduction of the composite was examined.Hematite,iron ore and graphite reagents were used for the preparation of the composite samples.The composite sample was put into the electric furnace in a high pressure chamber and then heated at a heating rate of 10K/min.Target temperature and pressure were varied.Weight loss fraction (WLF) was obtained by the difference between sample masses before and after reduction,and reduction degree of iron oxide and gasification degree of carbon were calculated by the chemical analysis.Under higher pressures,there was a remarkable increase in WLF of composite sample heated to the temperature higher than 1123K.Further,reduction and gasification reactions tended to proceed at lower temperature with increasing pressure.These can be attributed to a promotion effect of the high pressure on the heat transfer inside the composite.
机译：许多研究人员研究了铁矿石和碳质材料复合物的减少行为，以用作抑制来自炼铁过程的二氧化碳排放的潜在负担。然而，它的使用似乎在爆炸的标准条件下受到限制炉子本研究中，研究了高达8.0MPa的升高，高达8.0MPa在复合材料的还原中。光磷灰石，铁矿石和石墨试剂用于制备复合样品。复合样品被放入在高压室中的电炉，然后以10k / min的加热速率加热。变化温度和压力变化。通过在减少之前和之后的样品质量之间的差异和铁的差异而获得重量损失级分（WLF）。通过化学分析计算氧化碳和气化度。在压力较高时，将复合样品的WLF加热至高于高于1123K.Further，减少和气化反应倾向于在较低的温度下进行，随着压力的增加。这些可归因于高压对复合材料内的热传递的促进作用。

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