The bell valve and fire duct are important equipments to guarantee the production of blast furnace in the first iron mill of Jinan Iron and Steel Group Co. the life span becomes bottleneck of conditioning technique and economic target to elevate in the blast furnace .

济钢第一炼铁厂高炉料 钟、 放散 阀、火管是维系高炉生产的重要设备，其寿命成为制约高炉技术经济指标提高的瓶颈。

Analysis and resolution of the hydraulic system trouble in the top of HY bell ─ valve blast furnace

HY型 钟 阀炉顶液压系统的故障分析和排除方法