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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。
In order to improve the low-temperature reduction and pulverization performance of iron ore in the furnace to adapt to various ironmaking conditions, the sinter ore, pellet ore and lump ore, which are commonly used in ironmaking, were studied to control the composition and temperature of reducing gas Way, investigated and compared the different types of iron ore in the blast furnace ironmaking process and COREX non-blast furnace iron-making process under the conditions of two kinds of low-temperature reduction powderization behavior. The experimental results show that the degree of reduction and reduction of sinter, pellet and lump ore are quite different under the same reduction atmosphere and temperature, and the sensitivity of various iron ores to the nature and temperature of gas Different. This is more practical and reference value for more comprehensive examination and evaluation of the characteristics of low temperature reduction pulverization of different types of iron ore, thereby improving the metallurgical properties of iron ore and optimizing the parameters of ironmaking.