The background,innovation highlights,specific work and practical effect of the integration and inno- vation in Baosteel No.4 BF's PCI project.The innovation highlights of the project are as follows:the project's e- quipment scale and design indicators have reached the world top grade;special equipments have been localized;and independent integration of facilities for the project have been realized.All these greatly reduced the investment to the project.In the innovation process,the principles of paying attention to the fundamental research,integrating theory with practice and combining design with production were followed;spot investigation and combining design with pro- duction closely were emphasized;simulating tests in laboratories and on-the-spot industrial tests were focused;tech- nological investment was strengthened;powerful design teams were organized;and decisions were made on the work- ing site so as to facilitate the construction.Practice has proved that integration and innovation of Baosteel's PCI tech- nology for No.4 BF was a great success.

Through the introduction of a good many historical facts of “the first”,such as the first set of PCI device,the first rich oxygen injection,the first dense state transport and the first breakthrough of 200kg/t PCI,the PCI history of China blast furnaces has been reviewed briefly.

为了改善3号高炉煤粉输送,提高煤粉燃烧率,中钢在煤粉燃烧试验的基础上,开发了能够防止喷枪堵塞侵蚀的双气冷同轴喷枪系统,通过采取布料改善、理论燃烧温度调节以及渣量减少等措施,在较高生产率条件下,使喷煤比从130kg/t增至160kg/t.

高炉喷煤技术已有160余年的发展历史,至少有七八种成熟的喷煤工艺被广泛用于工业化生产,而且都有过吨铁喷煤200kg以上的生产实绩.目前,仅日本、中国和荷兰的一些高炉拥有月均吨铁喷煤超过250kg的世界级实绩.未来3～5年,世界一流水准的吨铁喷煤指标应在240～260kg左右,个别高炉可能会达到280～300kg,而且使用的仍然是现有的喷吹流程,但在控制和检测方面将会有较大改进.

印度京德勒钢公司正在建造一座"绿色"钢厂,目的是使热轧卷年产量达到160万t.该工程的技术核心是两台由奥钢联提供的、可向炼钢厂供应优质铁水的COREX装置,其中一台于1999年8月投产,已体现出生产灵活性以及在生产率、产品质量和操作成本诸方面的高标准.第二台装置也于2001年投产.