高铁低硅烧结技术发展动态

Development Trends of High-Silicon Low-silicon Sintering Technology

近年来,随着我国高炉炼铁技术的不断进步,对入炉矿品位的要求也不断提高。目前高铁低硅烧结技术的研究已经成为烧结技术发展的一大进步。应用高铁低硅烧结可进一步提高入炉品位,达到提铁、降硅、节焦及降低生铁成本的目的。此技术也对改善高炉冶炼条件和相应的技术经济指标具有非常重要的意义,并且响应国家号召,实现炼铁工艺的节能降耗。然而随着烧结矿中铁品位的提高,SiO_(2)含量的降低,特别是当SiO_(2)含量低于5%时,烧结过程中液相量的减少,粘结相的不足等问题势必会影响烧结矿的强度和产、质量。所以解决这些问题,成为高铁低硅烧结技术能够持续创新发展的不竭动力。本文主要是对高铁低硅烧结技术在国内外的发展现状所做的一个归纳总结,以及根据生产实际出现的问题提出相应的解决措施,同时对该技术未来发展趋于智能化所做出的一些设想。

In recent years,with the continuous progress of China's blast furnace ironmaking technology,the requirements for the grade of ore into the furnace have also increased.At present,the research on high-speed and low-silicon sintering technology has become a great progress in the development of sintering technology.The application of high-speed and low-silicon sintering can further improve the quality of the furnace,and achieve the purposes of iron lifting,silicon reduction,coke reduction and pig iron cost reduction.This technology is also of great significance for improving blast furnace smelting conditions and corresponding technical and economic indicators,and the corresponding state has called for the energy saving and consumption reduction of the ironmaking process.However,with the increase of iron grade in sintered ore,the content of SiO_(2) decreases,especially when the content of SiO_(2) is less than 5%,the liquid phase volume decreases during the sintering process,and the problems of insufficient bonding phase are bound to affect the strength and sintered ore,production and quality.Therefore,solving these problems has become an inexhaustible motive force for the continuous innovation and development of high-speed low-silicon sintering technology.This article is mainly a summary of the current development status of high-speed low-silicon sintering technology at home and abroad,as well as corresponding solutions based on actual production problems.At the same time,some ideas for the future development of the technology are becoming intelligent.