鞍钢高炉喷吹燃料的综合特性分析

Comprehensive analysis on characteristics of injection fuel in Ansteel blast furnace

为了充分掌握大喷煤条件下高炉喷吹不同燃料的可行性,对几种可用于鞍钢高炉喷吹的不同煤级煤种进行了深入研究,主要包括喷吹煤种的工业分析、元素分析,灰成分、发热量、可磨性、着火点和爆炸性、灰熔特性、燃烧性、反应性分析等。同时,结合动力学计算来表征不同煤种的化学反应特性差异。结果表明,随着煤级的升高,煤的软化温度逐渐提高,这主要和氧化钙的作用相关;提质煤和兰炭具有优异的燃烧和气化特性,并且其价格优势明显,安全爆炸性和可磨性符合高炉喷吹要求,搭配混合燃料进行高比例喷吹时有利于燃料结构优化和喷吹成本控制。

In order to fully grasp the feasibility of blast furnace injection with different fuels under the condition of large coal injection, a deeply study on several coals with different coal ranks that could be used for injection in Ansteel blast furnace was conducted. The main research included proximate analysis, ultimate analysis, ash composition, heat value, grindability, ignition point and explosiveness, ash melting characteristics, combustion characteristic, reaction of coals, and so on. Kinetic calculation was also combined to characterize the difference in chemical reactions of different coals. The results show that with the increase of coal rank, the softening temperature of coal gradually increases, which is mainly related to the effect of calcium oxide. Upgraded coal and blue charcoal both have excellent combustion and gasification characteristics, and their price advantages are obvious. The safety performance and grindability of them meet the requirements of blast furnace injection. When used as a mixed fuel, its high proportion injection is beneficial to the optimization of fuel structure and cost control.