未燃煤粉对高炉炉渣流动性的影响  

Influence of Unburned Coal Powder on Fluidity of Blast Furnace Slag

作　　者：于春梅[1] 李燕江 梁旺 YU Chunmei;LI Yanjiang;LIANG Wang(School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083

出　　处：《有色金属工程》2024年第4期97-104,149,共9页Nonferrous Metals Engineering

基　　金：国家自然科学基金资助项目(52074029)。

摘　　要：高炉喷吹煤粉技术是降低炼铁生产成本、优化高炉操作的主要技术手段,在高喷煤比条件下未能在风口回旋区燃尽的残炭颗粒以未燃煤粉形式进入料柱,过多的未燃煤粉会对炉渣性能产生不利影响。为了研究未燃煤粉对高炉炉渣流动性的影响,通过X射线衍射分析、扫描电子显微镜和能谱分析仪等分析手段研究了未燃煤粉在炉渣中的存在状态及对炉渣性能的影响。结果表明,未燃煤粉颗粒呈均匀状分布于炉渣中,添加未燃煤粉前后炉渣黏度与温度的关系均满足阿伦尼乌斯方程,并且黏度值随着温度降低均呈现出增大趋势。随着未燃煤粉固体颗粒质量分数增加,炉渣黏度呈线性增大趋势,并且炉渣中未燃煤粉含量越多,转速对非均相熔体黏度的影响越明显。Pulverized coal injection technology is the main way to reduce the production cost of iron making and optimize the operation of blast furnace.Under the condition of high coal injection ratio,the residual carbon particles that are not burned out in the tuyere raceway enter the charge column in the form of unburned coal powder,and too much unburned coal powder will adversely affect the performance of slag in order to study the influence of unburned coal powder on the fluidity of blast furnace slag,X-ray diffraction analysis,scanning electron microscope and energy spectrum analyzer were used to study the state of unburned coal powder in the slag and its influence on slag performance.The results show that the coal powder particles are uniformly distributed in the slag.The relationship between slag viscosity and temperature before and after adding unburned coal powder satisfies the Arrhenius equation,and the viscosity value shows an increasing trend with the decrease of temperature.With the increase of the mass fraction of unburned coal powder solid particles,the slag viscosity showed a linear increase trend,and the more unburned coal powder content in the slag,the more obvious the influence of rotation speed on the viscosity of heterogeneous melt.

关 键 词：未燃煤粉 炉渣 黏度 非均相熔体 

分 类 号：TF534.1[冶金工程—钢铁冶金]