EDTA滴定法测定钢包钙铝合金包芯线中铝  

Determination of Aluminum in Ca-Al Alloy Cored Wire Fed to Ladle by EDTA Titration

作　　者：王成林[1] 董丙成[1] 王航民[1] 

机构地区：[1]莱芜钢铁集团有限公司技术中心

出　　处：《莱钢科技》2010年第6期72-73,共2页Laigang Science & Technology

摘　　要：试验了钙铝合金包芯线中铝的分析方法及测定铝的最佳条件。试样用盐酸、过氧化氢溶解,在氯化铵存在下经氨水沉淀分离钙,强碱氢氧化钠沉淀分离铁、锰、钛后,在PH5的弱酸性介质中加入EDTA络合铝,以PAN为指示剂,用硫酸铜标准溶液滴定过量的EDTA,加入氟化铵络合铝并释放出相应当量的EDTA,再用硫酸铜标准溶液滴定EDTA。根据硫酸铜标准溶液消耗的体积,计算出铝的质量分数。The analytical method of aluminum in Ca-Al alloy cored wire and the optimum condition of determinating aluminum were obtained by experiments.The samples were dissolved by hydrochloric and hydrogen peroxide,after the calcium was precipitated and separeted using ammonia and iron manganese and titanium were precipitated and separeted using sodium hydroxide,EDTA was added into PH=5 weak acidic medium to complex with aluminum,excessive EDTA was titrated with CuSO4 standard solution using PAN as indicator,and ammonium fluoride was added to complex with aluminum with the corresponding amount of EDTA released,then EDTA is titrated with CuSO4 standard solution.According to the volume of CuSO4 standard solution used,the mass ratio of Aluminum was calculated.

关 键 词：钙铝合金包芯线 氯化铵 氨水 氢氧化钠 EDTA滴定法 

分 类 号：TQ134.11[化学工程—无机化工]