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自1976年广东省钢铁研究所试验研究外热竖炉煤基直接还原法至今,已完成了探索性试验、竖炉连续小试验和扩大试验。外热竖炉煤基直接还原法具有工艺与设备流程简单、操作控制简便、原燃料适应范围广、海绵铁性能稳定、无污染与噪音、全面技术经济指标较好、生产能力起点低和一次投资少等特点,特别适合于地方中小型钢铁企业。
Since 1976, the Guangdong Institute of Iron and Steel Institute pilot study of external thermal shaft coal-based direct reduction method so far, has completed the exploratory test, shaft furnace continuous small test and expansion test. The coal-based direct reduction method of external thermal shaft furnace has the advantages of simple process and equipment flow, simple operation and control, wide range of raw fuel adaptability, stable performance of sponge iron, no pollution and no noise, good overall technical and economic indicators, low starting point of production capacity and one investment Less features, especially for small and medium-sized local iron and steel enterprises.