The combustion principle and the process flow about the GCI technology were introduced . In additional , according to the Laigang steel's GCI technology , the maturity and feasibility was illustra-ted.The advantage of GCI technology was shown , for example the lower investment , lower energy combustion , handing safety , lower operation cost , and should be used widely in making iron industry.%介绍了高炉喷吹粒煤的燃烧机理、粒煤喷吹的工艺流程，莱钢1880 m3高炉粒煤喷吹技术的生产实践，说明该技术是成熟可行的，同时阐述了粒煤喷吹技术具有投资省、能耗低、操作安全、运行成本低等优点，具有很好的推广使用价值。
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