青岛特钢2×1800m^3高炉喷煤系统工艺设计

Process Design of 2×1800m^3 BF Pulverized Coal Injection System of Qingdao Special Steel Plant

分析了青岛特钢2×1 800m^3高炉喷煤系统的工艺设计特点。该喷煤系统采用烟气自排式制粉工艺流程,二罐并列、单总管加炉前双分配器直接喷吹工艺。在设计中采用了定量圆盘配煤、共用煤粉仓、圆盘旋转给料喷吹及煤粉喷吹泄压返粉等先进技术。一年多的生产实践表明,该喷煤系统生产运行稳定,已基本达到设计指标,为高炉的稳定顺行创造了有利条件。

The paper analyzes the characteristics of process design of 2×1 800 m^3 BF pulverized coal injec-tion system of Qingdao Special Steel Plant, which adopted fume self exhaust type pulverized coal preparation flow process, two parallel hopper charging and direct injection process with single manifold and double dis-tributors at cast house floor. Some advanced technologies were adopted in the design such as qualitative disc coal blending, common coal silo, disc type rotary feeding and injection and pulverized coal return with pres-sure relief. Over one yearns production practice showed the pulverized coal injection system ran stably and ba-sically reached design specification, creating favorable conditions for the stable operation of blast furnace.