Development Trends of High-Silicon Low-silicon Sintering Technology

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 SiO₂ decreases, especially when the content of SiO₂ 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.