低温冶金技术理论和技术发展

低温冶金通过细化铁矿粉、并运用催化等手段来研究加快铁矿粉在较低反应温度下的还原速度的理论和方法，为开发低能耗、低碳排放、高效的非高炉炼铁新工艺提供理论基础。低温还原理论方面的研究成果，包括细微铁矿粉具有纳米晶粒、储能的铁矿粉能够提高还原气体的利用效率、细粒度改善反应效率、催化剂提高反应速度、改善低温冶金反应的传输条件、多级循环流化床的流化规律以及低温还原冶炼粒铁等理论。在低温还原冶金新技术方面包括改进的熔融还原炼铁工艺、优质海绵铁和粒铁的低温还原工艺。低温还原工艺有望实现节能、低碳、高效和低成本冶金，并能应用于低品位铁矿、含铁冶金渣、赤泥以及钒铁磁铁矿、钛精矿等的综合利用。

Progress of Low-Temperature Metallurgy

Low-temperature metallurgy is to study the theories and methods of accelerating reduction of iron ore at a lower temperature by refining iron ore,using catalyst and other means,and provide theoretical basis for the development of the alternative ironmaking process with low energy consumption,low carbon emission,and high efficiency.The research results of low-temperature reduction theory including: fine iron ores have nanograins;energy storage of fine iron ore can improve the utilization efficiency of reducing gas;reaction efficiency can be improved by size refining;the reaction rate can be increased with catalyst;the transmission conditions of the low-temperature reaction are improved;the fluidization mechanism of the multi-stage circulating fluidized bed is studied;and iron nuggets are smelted at a lower temperature.The new technologies of the low-temperature metallurgy including: the improved smelting reduction ironmaking process;low-temperature reduction process of high-quality sponge iron and iron nuggets.Low-temperature reduction process is expected to achieve the energy saving,low-carbon,efficient and low-cost metallurgy,and can be applied to the comprehensive utilization of low-grade iron ore,ferrous metallurgical slag,red mud and vanadium titano magnetite,ilmenite,etc.