工程科学学报2018，Vol.40Issue(3)：321-329,9.DOI:10.13374/j.issn2095-9389.2018.03.008
铁矿粉液相流动性的主要液相生成特征因素解析
Major melt formation characteristic factor analysis of iron ore liquid phase fluidity during the sintering process
吴胜利 1苏博 1齐渊洪 2李园 2杜斌斌1
作者信息
- 1. 北京科技大学冶金与生态工程学院,北京100083
- 2. 钢铁研究总院先进钢流程及材料国家重点实验室,北京100081
- 折叠
摘要
Abstract
Sinter ore is one of the main materials of blast furnaces in China, and the productivity of the blast furnace and the economic and technical indicators of the ironmaking process are directly influenced by sinter yield and quality. Therefore, the ore-blending process should be optimized based on the high-temperature characteristics of iron ore to improve the sinter yield and quality and the energy efficiency of the ironmaking process. The liquid phase fluidity of iron ore is a vital characteristic of high-temperature sintering, since a suitable liquid phase fluidity of blended ores produces a sintered body with a stronger bonding strength. In this paper, by simulating the contact state of the iron ore particles and the calcareous flux particles in the actual sintering adhering fines, the FactSage thermodynamic calculation and the visible micro-sintering tests were conducted to study the liquid phase fluidity indexes of different iron ores and the major melt formation characteristic factors that influenced the liquid phase fluidity of iron ore under fixed CaO ratio conditions. The results show that the rule of liquid phase fluidity of iron ores under a fixed CaO ratio is different from the rule of liquid phase fluidity of iron ores with fixed alkalinity. According to the fitting relationship between the calculation results by Factsage software and the testing results of liquid phase fluidity index of the 9 kinds of iron ores, the formed melt content of iron ore is the most important melt formation characteristic factor that affects liquid phase fluidity. The formed melt content and the liquid phase fluidity index are directly related, and the coordination mechanism of liquid phase fluidity of iron ore is based on the principle of linear superposition of the formed melt content. Furthermore, the content of gangue minerals affects the liquid phase fluidity of iron ore to some extent. The liquid fluidity index decreases greatly with increased SiO2 content, leading to lower formed melt content, while the liquid fluidity index slightly increases with increased Al2 O3 content.关键词
铁矿粉烧结/黏附粉/液相流动性/热力学计算/液相生成特征Key words
iron ore sintering/adhering fines/liquid phase fluidity/thermodynamic calculation/melt formation characteristics分类
矿业与冶金引用本文复制引用
吴胜利,苏博,齐渊洪,李园,杜斌斌..铁矿粉液相流动性的主要液相生成特征因素解析[J].工程科学学报,2018,40(3):321-329,9.
