Abstract: Based on the physical and process properties of 2 kinds of pulverized coal and 3 kinds of semi-coke, including ash fusion point, grindability index, ignition point, explosibility and combustibility, all the properties of bituminite, anthracite and semi-coke are evaluated, and eventually reasonable solutions of coal blending are established. The results showed that pulverized coal injection with addition of semi-coke, the blended coal grindability increased, explosibility weakened, ignition point decreased, the ash fusion point rose and their combustion rates were both above 85%. Moreover when the semi-coke ratio reached 40%, the blended coal for blast furnace injection was viable and would obtain more excellent metallurgical properties.

Key words: blast furnace, semi-coke, injection, coal blending, combustibility

摘要： 对2种高炉喷吹用煤和3种半焦的可磨性指数、着火点、爆炸性、灰熔点及燃烧性进行了研究，考察了5种原料的冶金性能及配煤对高炉喷吹性能的影响，确定了合理的配煤方案. 结果表明，高炉喷吹煤粉配加半焦后，混合煤的可磨性增加，爆炸性减弱，着火点降低，灰熔点提高，燃烧率约为85%. 半焦配比达40%时，混合煤用于高炉喷吹可行，并可获得更优良的冶金性能.

关键词: 高炉, 半焦, 喷吹, 配煤, 燃烧性