电磁在线检测再生铝铸造流程中夹杂物的浓度与粒径分布  

Electromagnetic on-line detection of inclusions concentration and particle size distribution in recycled aluminum casting process

作　　者：鄢浩 吴云飞 王佳豪 那贤昭[2] 王晓东 YAN Hao;WU Yunfei;WANG Jiahao;NA Xianzhao;WANG Xiaodong(College of Materials Science and Opto-Electronic Technology,University of Chinese Academy of Sciences,Beijing 100049,China;State Key Laboratory of Advanced Steel Processes and Products,Central Iron and Steel Research Institute Co.,Ltd.,Beijing 100081,China)

机构地区：[1]中国科学院大学材料科学与光电技术学院,北京100049 [2]钢铁研究总院有限公司先进钢铁流程及材料国家重点实验室,北京100081

出　　处：《中国冶金》2024年第6期136-143,共8页China Metallurgy

基　　金：北京市科学技术委员会资助项目(Z201100008420010)。

摘　　要：再生铝由于其绿色、环保、可循环利用等优点成为铝工业未来重要的发展方向,如何实现再生铝中夹杂物的检测和控制成为再生铝技术的研究重点。为研究再生铝铸造流程中夹杂物粒径和浓度变化趋势,通过基于电敏感区法的测量方法对再生铝铸造流程中的夹杂物进行了测量。该方法具有实时、在线、定量测量的特点和优势。设计了可用于再生铝熔体夹杂物检测的测量装置,通过对采样管中凝固的铝液进行金相检测,验证该装置对夹杂物的“捕获”能力,并利用该装置对铸造流程中的夹杂物进行测量。结果表明,夹杂物的粒径分布范围由熔炼前的[20,70]μm降低至过滤后的[10,40]μm;熔炼后浓度最高的粒径由49μm(1.39×103个/kg)下降至静置后的39μm(1.03×103个/kg)以及过滤后的21μm(0.74×103个/kg);过滤后夹杂物的N20~N60指标较熔炼后分别下降了76%、91%、97%、98%、98%。研究结果对再生铝铸造流程及工艺的优化具有参考价值。Recycled aluminum has become an important development direction of the aluminum industry in the future due to its advantages of green,environmental protection and recyclability,and how to realize the detection and control of inclusions in recycled aluminum is the focus of research on recycled aluminum technology.In order to study the trend of inclusion particle size and concentration in the recycled aluminum casting process,the inclusions in the recycled aluminum casting process were measured by the measurement method based on the electrical sensing zone method.This method has the characteristics and advantages of real-time,online,and quantitative measurement.A measuring device for the detection of recycled aluminum melt inclusions was designed,and the ability of the device to"capture"the inclusions was verified by metallographic detection of the solidified molten aluminum in the sampling tube,and the inclusions in the casting process were measured by the device.The results show that the particle size distribution range of the inclusions decreases from[20,70]μm before melting to[10,40]μm after filtration,the particle size with the highest concentration after melting decreases from 49μm(1.39×103/kg)to 39μm(1.03×103/kg)after standing and 21μm(0.74×103/kg)after filtration,and the N20-N60 indexes of filtered inclusions decrease by 76%,91%,97%,98%and 98%,respectively.The research results have reference value for the optimization of the recycled aluminum casting process.

关 键 词：再生铝 铸造流程 夹杂物 电敏感区 电磁测量 

分 类 号：TG292[金属学及工艺—铸造] TG115.284