电感耦合等离子体原子发射光谱法测定电渣预熔渣中氧化铝含量  

Determination of Al2O3 in Premelted Slag for Electroslag Remelting Process by Inductively Coupled Plasma Atomic Emission Spectrometry

作　　者：段双 朱智 董文博 金小成 高鹏 DUAN Shuang;ZHU Zhi;DONG Wen-bo;JIN Xiao-cheng;GAO Peng(Shenyang Research Institute of Foundry Co.,Ltd.,State Key Laboratory of Light Alloy Foundry Technology for High-End Equipment,Shenyang 110022,Liaoning,China)

机构地区：[1]沈阳铸造研究所有限公司,高端装备轻合金铸造技术国家重点实验室,辽宁沈阳110022

出　　处：《铸造》2020年第11期1176-1179,共4页Foundry

摘　　要：电渣预熔渣在电渣冶金领域发挥着极其重要的作用,而其中氧化铝的含量直接影响渣料的电导率、脱硫效果和重熔稳定性,故快速、准确地测定电渣预熔渣中氧化铝含量对研究渣料体系和电渣重熔技术有重要意义。试验提出样品经高温灼烧除碳,在铂坩埚中用碳酸钠-硼酸混合熔剂熔融,以(1+1)盐酸浸出熔融物稀释至一定体积,选择Al 394.401 nm作为分析线,使用电感耦合等离子体原子发射光谱法(ICP-AES)测定电渣预熔渣中氧化铝含量。试验没有明显的基体效应。铝质量浓度在5.00~50.0μg/mL范围内与其发射强度呈线性关系,线性相关系数大于0.999;方法检出限为0.069%,测定下限为0.23%。依试验方法分别测定三种标准样品中氧化铝含量,其结果的相对标准偏差(RSD, n=11)为0.64%~0.87%。Premelted slag for electroslag remelting process plays an important role in metallurgical industry. The content of Al2O3 directly affects the conductivity, desulfurization effect and remelting stability of premelted slag. To determine the content of Al2O3 rapidly and accurately has great significance in researching premelted slag system for electroslag remelting process and electroslag remelting technology. In the experiment, the sample in a platinum crucible with sodium carbonate + boracic acid mixed flux was burned at a high temperature furnace to remove carbon and fused completely;the fusion in the crucible was soaked out with(1+1) hydrochloric acid solution, and then was diluted with distilled water. Subsequently, the content of Al2O3 in the premelted slag was determined by using the inductively coupled plasma atomic emission spectrometry(ICPAES) with Al 394.401 nm as the analytical line. There is no obvious matrix effect in the experiment. The mass concentration of aluminum in the range of 5.00~50.0 μg/mL was a linear relation with the corresponding emission intensity. The linear correlation coefficient of calibration curve of aluminum was higher than 0.999. The detection limit of this method was 0.069% and the low limit of detection was 0.23%. The proposed method was applied to the determination of Al2O3 in all the three samples. The relative standard deviation(RSD, n=11) of detection results were between 0.64% and 0.87%.

关 键 词：内电感耦合等离子体原子发射光谱 电渣预熔渣 氧化铝 

分 类 号：TG115.33[金属学及工艺—物理冶金]