合理选择二次精炼技术,推进高效率低成本“洁净钢平台”建设

Selecting secondary refining technology properly and pushing forward construction of high efficient and low cost "clean steel platform"

世界金融危机使国内外钢铁工业受到严峻的挑战。中国钢铁工业调整和振兴的重点之一,是以科技进步调整、优化产品和工艺。加快推进高效率、低成本"洁净钢平台"建设已成为当前钢铁厂科技创新的重要任务之一。中国炉外精炼技术的发展经历了起步、推广和优化3个重要阶段,已有了明确的指导思想,达到了一定的规模和水平、积累了经验和掌握了许多关键技术;但精炼比低、合理选择和应用精炼功能等方面尚待改进。研究总结长材、热卷、中厚板、冷轧材等代表钢种炉外精炼高效、优化的工艺,可为各企业提供参考经验。深化对不同类型炉外精炼功能的理解并合理选择,有利于使不同类型产品的基本精炼工艺规范化,有利于加快我国高效率、低成本"洁净钢平台"的建设步伐。

The iron and steel industry at home and abroad is now tacing a very sertous challenge of the worldwide financial crisis today. One of the key points for readjustment and rejuvenation of the iron and steel industry of China is to adjust and optimize the products and processes by means of scientific and technological progress and in the meanwhile acceleratedly pushing forward the construction of the high efficient and low cost ＂clean steel platform＂ has become one of the current scientific and technological in- novative tasks of the iron and steel works. The development of secondary refining tech- nology in China has already gone through three important phases, namely initial step, popularization and optimization and uptodate with a very clearcut guiding principle it has grown up to a certain level and scale and has accumulated experience and taken hold of quite a number of key technologies. However certain problems such as low refining rati- o,incompetency of properly selection and application of the refining functions still need to be further improved. The high efficient and optimal technological processes of the sec- ondary refining for such a few typical steel grades as the long products, hot rolled coils, medium plate and cold rolled sheets have to be studied and summarized in order to pro- vide some referential experience for enterprises of the various kind. Deepening our un- derstanding of the functions o~ different types of the secondary refining and properly se- lecting them will be propitious to the standardization of the basic secondary refining processes for different types of products as well as be beneficial to expedite the construc- tion of the high efficient and low cost ＂clean steel platform＂.