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我队曾成功地制订了钒钛磁铁矿中钛和铁的连续容量测定的方法,完成了大量的生产任务。方法是用锌片还原,液体石腊或苯保护,次甲基兰为指示剂,用重铬酸钾先滴定钛,再用二苯胺磺酸钠为指示剂,继续滴定铁。提高了工作效率,并避免了钛对铁的可能干扰。但第一终点掌握的难度较大,锌粒还原的速度稍慢。针对这种情况,本文作了如下的改进:采用铝片进行了还原;用饱和硫酸铵及装有饱和碳酸氢钠水
Our team has successfully developed a method for the continuous capacity determination of titanium and iron in vanadium-titanium magnetite and completed a large number of production tasks. Method is to use zinc reduction, liquid paraffin or benzene protection, methylaniline as an indicator, first titration with potassium dichromate titanium, then sodium diphenylamine sulfonate as an indicator to continue titration of iron. Improve work efficiency and avoid possible interference of titanium with iron. However, the difficulty of mastering the first end, zinc reduction slower. In view of this situation, this article made the following improvements: The use of aluminum sheet was reduced; with saturated ammonium sulfate and saturated with sodium bicarbonate water