中文摘要：

利用压汞仪测定了不同MgO条件下的低硅烧结矿样品的孔隙分布，结合多重分形理论计算了其孔隙分布的分形特征。研究结果表明，随着MgO含量的增加，烧结矿样品水银浸入增量与孔径尺寸之间的关系满足多重分形理论，当MgO含量为2．6％时，孔隙具有较好的分形结构，气孔尺度分布较均匀，气孔大，气孔率较好，有利于冶金性能的改善。适量的MgO含量可以提高低硅烧结矿的冶金性能，改善炉渣的稳定性、流动性，有利于高炉顺行。

英文摘要：

The pore distribution of low silica sinter samples with different MgO was measured by mercury porosimeter,and its fractal characteristics of pore distribution were calculated in combination with the multi-fractal theory. The result shows that with the increase of MgO content in the sinter,the relationship between the increment of mercury immersed and the pore size m~ts the muhi-fractal theory, when the MgO content is 2：6%, the pore has a good fractal structure, with uniform pore size distribution, big pore size and good porosity, which are favorable for improving metallurgical properties. The appropriate amount of MgO content can improve the metallurgical properties of low silica sinter, thereby can improve slag stability and fluidity, which is favorable for smooth operation of the blast furnace.