Rapid reduction of low grade iron ore and effective energy conversion of low rank coal by enhancing a solid-solid reaction

这项工作旨在提高钢铁行业的高炉操作效率。为此，提出了一种促进最慢固-固反应的实用方法--焦炭本身还原铁矿石。首先，以纳米Fe_2O_3颗粒为模型铁矿石，证明了固-固反应实际上是在低至600℃下进行的。其次，研究了在高炉内实现快速固-固反应的方法。研究发现，将低品位煤制备的热塑性炭质材料通过水化作用嵌入到低品位铁矿石中形成的纳米孔中，可以有效地实现快速固-固反应。

This works aimed at increasing the efficiency of blast furnace operation in steel industry. To do so, a practical method to promote the slowest solid-solid reaction, reduction of iron ore by coke itself, was proposed. First, it was shown that the solid-solid reaction actually proceeds at as low as 600 C by using nano sized Fe2O3 particles as a model iron ore. Next, a method to realize the rapid solid-solid reaction in blast furnace was examined. It was found that inserting thermo-plastic carbonaceous materials prepared from low rank coal into nano-sized pores formed in a low grade iron ore by hydration is effective to realize the rapid solid-solid reaction.