高炉喷吹半焦及其性能分析

Performance Analysis of Semi-coke for Blast Furnace Injection

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.

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.