摘要
研究红土镍矿中铁的测定方法,对其含量进行快速准确测定具有重要的现实意义。采取碱融分解样品,在盐酸介质中,用氯化亚锡-三氯化钛还原Fe3+,以二苯胺磺酸钠为指示剂,重铬酸钾直接滴定测定红土镍矿中的全铁含量。确定了最佳的样品处理及测定条件,考察了含量较高的杂质元素对测定的影响。方法操作简单,流程短,干扰少,具有较好的精密度和准确度,能够满足红土镍矿中全铁含量的测定要求。
It is very important to study on determinating the total iron in laterite nickel ore fast and accurately.The flux Na2O2 is used for sample decomposition.In HCl medium,Fe3＋ is reduced by tin chloride-titanium trichloride.The total iron in nickel-bearing laterite is titrated by potassium dichromate standard solution with sodium diphenylamine sulfonate as indicator.The optimal analytical conditions are determined.The influence of high content coexist ions is investigated.The method is of following characteristics： simple operation,short process,less interference,and good precision and accuracy,which can meet the requirements of laterite nickel ore in the determination of total iron.
出处
《矿冶》
CAS
2011年第4期113-115,共3页
Mining And Metallurgy
关键词
红土镍矿
重铬酸钾
全铁
滴定法
laterite nickel ore
potassium dichromate
total iron
titrimetry
