基于不同炼铁工艺的铁矿石低温还原粉化特征

 为改善铁矿石在炉内的低温还原粉化性能以适应多样的炼铁生产条件，以炼铁生产常用的烧结矿、球团矿以及块矿为研究对象，通过控制还原气体成分和温度的方式，考察并比较了不同种类铁矿石在高炉炼铁工艺和COREX非高炉炼铁工艺2种煤气条件下的低温还原粉化行为。试验结果表明，相同的还原气氛和温度条件下，烧结矿、球团矿以及块矿的还原粉化形式、程度有较大差异，而各类铁矿石对煤气性质、温度变化的敏感性也各不相同。这对更为全面地考察和评价不同类型铁矿石的低温还原粉化特征，进而改善铁矿石冶金性能和优化炼铁工艺参数具有一定的实用性和参考价值。

Low Temperature Reduction Degradation Characteristics of Iron Ores Based on Different Ironmaking Processes

In order to improve low temperature reduction degradation characteristics of iron ores and adapt to various ironmaking conditions, sinter, pellet, and lump ore which are commonly used in ironmaking production were studied on their low temperature reduction degradation characteristics under different conditions of gas in blast furnace and COREX by controlling the gas composition and temperature. The results show that under the same reduction atmosphere and temperature condition, the reduction degradation characteristics and degrees of different ores are quite different, the sensitivities of which to reducing gas composition and temperature differs from one to another. This study has a certain practicability and reference value for investigating and evaluating low temperature reduction degradation characteristics of different iron ores which is beneficial to improving metallurgical properties of iron ores and optimizing the parameters in different ironmaking processes.