由于传统的高炉炼铁方式投资大、能耗高、流程长、污染严重，所以高炉的炼铁发展受到了很大的限制。为了克服高炉炼铁的种种缺点，人们研究开发了多种非高炉炼铁法，这些方法包括直接还原法和熔融还原法。
分析了主要的熔融还原炼铁流程。
COREX法是目前世界上成功地投入工业生产的唯一的熔融还原炼铁法。
COREX process is considered to be the only coal-based melting -reduction ironmaking process which has been successfully put into industrial operation presently in the world.
与高炉炼铁相比，熔融还原有利于获得较低磷含量的生铁。
The pig iron with low content of the phosphorous can be obtained by the smelting reduction in comparison with the blast furnace.
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