返滴定法测定钢包渣改质剂中总铝  

Determination of Total Aluminum in Ladle Slag Modifier by Back Titration Volumetric Method

作　　者：叶融 Ye Rong(Fujian Metallurgical Industry Design institute Co.,LTD.,Fuzhou 350011;,Fujian 2.Fujian Minye energy conservation and Environmental Protection Science and Technology Co.,Ltd.,Fuzhou 350011;,Fujian 2.Fuj)

机构地区：[1]福建省冶金工业设计院有限公司,福州350011 [2]福建闽冶节能环保科技有限公司,福建福州350011

出　　处：《福建冶金》2023年第6期52-54,共3页Fujian Metallurgy

摘　　要：本文采用混合熔剂高温熔融试样,六次甲基四胺溶液和强碱分离除去干扰元素,使用EDTA-氟盐取代返滴定法测定钢包渣改质剂中的总铝含量。讨论了溶样方法、氧化钙含量、干扰消除、EDTA用量对试验的影响。该方法测定结果相对标准偏差(RSD)0.4%~0.6%,已应用于日常检测工作中。This article uses a mixed flux high-temperature melting sample,hexamethylenetetramine solution and strong alkali separation to remove interfering elements,and uses back titration method of EDTA-fluoride salt substitution to determine the total aluminum content in the ladle slag modifier.This article also discusses the influence of sample dissolution method,calcium oxide content,interference elimination,and EDTA dosage on the experiment.The relative standard deviation(RSD)of the measurement results by this method is 0.4%~0.6%.This method has been applied in daily testing work.

关 键 词：容量法 钢包渣改质剂 铝含量 返滴定 

分 类 号：TF769[冶金工程—钢铁冶金] O655.2[理学—分析化学]