今年3月23到26日,美国矿冶工程学会钢铁协会在华盛顿举行第39届炼铁和63届炼钢学术年会。作为中国金属学会派出参加会议代表之一,我有机会和美国及其他国家一些生产技术及研究工作者交流和座谈,感到他们有些经验,成就和观点可供我们借鉴。 1.优先发展球团矿还是烧结矿六十年代以来,我国推广球团矿有几次起落,中小型厂稍好,大企业未达到预期效果,观点不同。据美国、日本的研究,虽然球团矿冷态下粒度整齐,气孔度大,冷强度也好,但按壳缩(拓扑)方式还原的球团矿在还原过程中期常常生成一层阻碍中心还原的铁壳,球中心留下大量浮氏体到高温区熔化成粘稠物,有的通过铁壳的薄弱地点冒出到球 March 23 to 26 this year, the United States Society of Mining and Metallurgical Engineering Iron and Steel Association held in Washington, the 39th ironmaking and 63 annual steelmaking academic annual meeting. As one of the representatives sent by China Metallurgical Society to attend the conference, I have had the opportunity to exchange and hold discussions with some production technicians and researchers from the United States and other countries and find that some of their experiences, achievements and perspectives are available to us for reference. 1. Give priority to the development of pellets or sinter Since the 1960s, China’s promotion of pellets have several ups and downs, slightly better for small and medium-sized factories, large enterprises did not achieve the desired results, different perspectives. According to the research of the United States and Japan, although the pellets have the advantages of granularity in cold state, large porosity and cold strength, the pellets reduced by shell contraction (topological) often generate a layer of hindered central reduction during the reduction process Of the iron shell, leave a lot of ball center of the body to the high temperature melting zone viscous material, and some through the weak point of the shell emerge to the ball