目前我国高炉装料装置,绝大多数是单室钟式炉顶,大钟寿命、炉顶压力和径向布料,没有满足高炉现代化生产要求。我国当前具体条件是炉料品种杂,原料处理设施水平低,特别对于热矿、湿泥巴矿及大块度附加料等,钟式炉顶相对有较大适应性,且现有高炉斜桥与炉口钢圈间净空都较小,因此尽管无钟炉顶有其优越性,但近期还不能普遍推广。钟式炉顶在我国将较长时期大量存在,改进这种炉顶对提高我国高炉生产效率有重大现实意义。这方面国内已有许多成功经验,例如:大钟采用双折角并增大接触角度;刚性钟配弹性斗;大钟 At present, most of blast furnace loading devices in China are single-chamber bell-tops, big-bell lifespan, top pressure and radial cloth, which do not meet the requirements of modern production of blast furnaces. At present, the specific conditions in our country are the variety of the charge, the low level of the raw material treatment facilities, especially for the hot mines, wet mud mines and large additional materials, and the bell-type top has relative great adaptability. The mouth clearance between the steel rings are smaller, so despite the bell-less roof has its advantages, but the recent can not be generalized. Bell-type roof in our country will be a large number of existence for a long time, to improve the roof to raise the production efficiency of blast furnace of great practical significance. There are many successful experiences in this field in China, such as the use of double bells for large bells and increased contact angles, the rigid bells for flexible buckets, the large bells