硅钡铁合金中钡的测定

• 作 者: 刘娟 王兰山 鞠锋 朴金哲
• 机 构: 大连企荣铸铁管有限公司理化中心,大连企荣铸铁管有限公司理化中心,大连企荣铸铁管有限公司理化中心,大连企荣铸铁管有限公司理化中心 大连116031,大连116031,大连116031,大连116031
• 出 处: 理化检验(化学分册)
• 发表日期: 1999年02期
• 关键词: 球墨铸铁管 盐酸介质 孕育剂 管模 稀硫酸 钡标准溶液 重量法测定 铸管 抗坏血酸溶液 盐酸用量

硅钡铁合金在离心球墨铸铁管生产中用作管模粉和孕育剂,其中钡的含量直接影响铸管的质量。目前,国内还未见有合适的测定方法,本文研究了在盐酸介质中,用抗坏血酸还原Fe~(3+)为Fe~(2+),消除其干扰,以稀硫酸为沉淀剂,重量法测定硅钡铁合金中钡的含量,试验了最佳的测定条件。本法操作简便、快速、准确度高、精密度高;已用于厂标生产中钡的测定。

Silicon barium ferroalloy is used as mold powder and inoculant in the production of centrifugal ductile iron pipe, in which the content of barium directly affects the quality of the pipe. At present, there is no suitable measurement method in our country. In this paper, we studied the reduction of Fe ~ (3 +) to Fe ~ (2+) with ascorbic acid in hydrochloric acid medium to eliminate the interference. The dilute sulfuric acid was used as precipitant, The content of barium in the barium iron alloy was measured and the best test conditions were tested. This method is simple, fast, high accuracy, high precision; has been used for the determination of barium production in the factory standard.