A blast furnace (BF) is the dominant process for making iron in the world. The BF is charged with metallurgical coke and iron burden materials including iron ore pellets, sinter, and lump ore. While descending in the BF the charge materials reduce. The iron‐bearing materials should reduce fast and remain in the solid form until as high a temperature as possible to ensure reaction contact with reducing gas and iron oxides. Herein, the reducibility of the iron ore pellet, sinter, and lump ore in the BF shaft are focused on. The experiments are conducted isothermally with a blast furnace simulator (BFS) high‐temperature furnace at four different temperatures (700, 800, 900, and 1000 °C) for 300 min. The experimental atmosphere consists of CO, CO₂, H₂, H₂O, and N₂ simulating the conditions in the BF shaft. It is found that lump ore has lowest reduction rate in all test conditions, and at lower temperatures iron ore pellets reduce faster than sinter, and this is reversed at higher temperatures. Furthermore, the reduction rate of sinter and iron ore pellets begins to resemble each other at higher temperatures.

中文翻译：

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在模拟高炉条件下减少铁矿石球团，烧结矿和块矿

高炉（BF）是世界上主要的炼铁工艺。高炉装有冶金焦炭和铁矿物质，包括铁矿石球团矿，烧结矿和块矿。在BF中下降时，装料减少。含铁材料应快速还原，并保持固态，直到尽可能高的温度，以确保反应与还原性气体和氧化铁接触。在此，着眼于高炉中的铁矿石球团矿，烧结矿和块矿的还原性。实验是使用高炉模拟器（BFS）高温炉在四个不同温度（700、800、900和1000°C）下等温进行300分钟。实验气氛由CO，CO ₂，H ₂，H ₂ O和N组成₂模拟高炉轴中的条件。发现块状矿石在所有测试条件下还原率最低，并且在较低温度下铁矿石球团的还原速度比烧结矿快，而在较高温度下则相反。此外，在较高温度下，烧结矿和铁矿石球团的还原率开始彼此相似。