工程科学学报，第40卷，第3期：321-329,2018年3月 Chinese Journal of Engineering,Vol.40,No.3:321-329,March 2018 DOI:10.13374/j.issn2095-9389.2018.03.008:http://journals.ustb.edu.cn 铁矿粉液相流动性的主要液相生成特征因素解析 吴胜利”，苏博2四，齐渊洪2》，李园”，杜斌斌” 1)北京科技大学治金与生态工程学院，北京1000832)钢铁研究总院先进钢流程及材料国家重点实验室，北京100081 ☒通信作者，E-mail:usth_subo@163.com 摘要烧结矿是我国高炉炼铁的主要原料，烧结矿质量将直接影响高炉治炼及炼铁工序的经济技术指标.因此，基于铁矿 粉的高温特性进行优化配矿从而改善烧结矿的产质量对于炼铁工序节能增效具有十分重要的现实意义·铁矿粉的液相流动 性是非常重要的烧结高温特性指标，适宜的液相流动性可以使烧结矿获得较高的固结强度.本文模拟实际烧结黏附粉层中铁 矿粉颗粒与钙质熔剂质点的接触状态，采用FastSage热力学计算和微型烧结可视化试验方法研究了固定CaO配比条件下铁 矿粉的液相流动性及其主要的热力学液相生成特征影响因素.研究结果表明，采用固定C0配比与固定碱度的熔剂配加方式 下，铁矿粉的液相流动性规律明显不同.铁矿粉的液相生成量是影响其液相流动性的最主要液相生成特征因素，液相生成量 越多则铁矿粉的液相流动性指数越大.铁矿粉液相流动性的配合性机制是基于其液相生成量的线性叠加原则.脉石矿物含 量将在一定程度上影响铁矿粉的液相流动性，随着SO,含量的升高铁矿粉的液相生成量减少，从而导致液相流动性指数显著 降低：而A12O含量增加，液相流动性指数略有升高. 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 分类号TF046.4 Major melt formation characteristic factor analysis of iron ore liquid phase fluidity during the sintering process WU Sheng-i,SU Bo,QI Yuan-hong?,LI Yuan),DU Bin-bin) 1)School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China 2)State Key Laboratory of Advanced Steel Processes and Products,Central Iron and Steel Research Institute,Beijing 100081,China Corresponding author,E-mail:usbt_subo@163.com ABSTRACT Sinter ore is one of the main materials of blast furnaces in China,and the productivity of the blast furnace and the eco- nomic 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 en- ergy 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 simu- lating the contact state of the iron ore particles and the calcareous flux particles in the actual sintering adhering fines,the FactSage ther- modynamic 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 condi- tions.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 收稿日期：2017-07-30工程科学学报，第 40 卷，第 3 期: 321--329，2018 年 3 月 Chinese Journal of Engineering，Vol． 40，No． 3: 321--329，March 2018 DOI: 10． 13374 /j． issn2095--9389． 2018． 03． 008; http: / /journals． ustb． edu． cn 铁矿粉液相流动性的主要液相生成特征因素解析 吴胜利1) ，苏 博1，2) ，齐渊洪2) ，李 园1) ，杜斌斌1) 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 通信作者，E-mail: ustb_subo@ 163． com 摘 要 烧结矿是我国高炉炼铁的主要原料，烧结矿质量将直接影响高炉冶炼及炼铁工序的经济技术指标． 因此，基于铁矿 粉的高温特性进行优化配矿从而改善烧结矿的产质量对于炼铁工序节能增效具有十分重要的现实意义． 铁矿粉的液相流动 性是非常重要的烧结高温特性指标，适宜的液相流动性可以使烧结矿获得较高的固结强度． 本文模拟实际烧结黏附粉层中铁 矿粉颗粒与钙质熔剂质点的接触状态，采用 FastSage 热力学计算和微型烧结可视化试验方法研究了固定 CaO 配比条件下铁 矿粉的液相流动性及其主要的热力学液相生成特征影响因素． 研究结果表明，采用固定 CaO 配比与固定碱度的熔剂配加方式 下，铁矿粉的液相流动性规律明显不同． 铁矿粉的液相生成量是影响其液相流动性的最主要液相生成特征因素，液相生成量 越多则铁矿粉的液相流动性指数越大． 铁矿粉液相流动性的配合性机制是基于其液相生成量的线性叠加原则． 脉石矿物含 量将在一定程度上影响铁矿粉的液相流动性，随着 SiO2含量的升高铁矿粉的液相生成量减少，从而导致液相流动性指数显著 降低; 而 Al2O3含量增加，液相流动性指数略有升高． 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 分类号 TF046. 4 收稿日期: 2017--07--30 Major melt formation characteristic factor analysis of iron ore liquid phase fluidity during the sintering process WU Sheng-li1) ，SU Bo1，2)  ，QI Yuan-hong2) ，LI Yuan1) ，DU Bin-bin1) 1) School of Metallurgical and Ecological Engineering，University of Science and Technology Beijing，Beijing 100083，China 2) State Key Laboratory of Advanced Steel Processes and Products，Central Iron and Steel Ｒesearch Institute，Beijing 100081，China Corresponding author，E-mail: usbt_subo@ 163． com ABSTＲACT Sinter ore is one of the main materials of blast furnaces in China，and the productivity of the blast furnace and the eco￾nomic 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 en￾ergy 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 simu￾lating the contact state of the iron ore particles and the calcareous flux particles in the actual sintering adhering fines，the FactSage ther￾modynamic 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 condi￾tions． 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