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高含量的钨矿石及钨精矿中三氧化钨的测定,长期以来,国内外一般选用重量法,用得较多的是钨酸铵灼烧重量法.这类方法虽然具有一定的准确度,但也受一些干扰元素的影响,而且流程复杂、速度慢、成本高,还需使用昂贵的铂皿.本文用酸碱滴定法测定,获得了较满意的结果.实验证明,该方法简便、快速、准确度较高、成本低,干扰元素分离较净,消除了很难分离的钼、铌、钽的影响,能适用于高含量的白钨矿及黑钨矿的分析.对易分解的白钨矿可用酸溶
The determination of tungsten oxide in high content of tungsten ore and tungsten concentrates has long been the gravimetric method used at home and abroad, and the most commonly used method is the gravimetric method of burning with ammonium tungstate.Although this kind of method has a certain degree of accuracy, But it is also affected by some disturbing elements, and the process is complicated, slow and costly, and an expensive platinum dish is also required. In this paper, the acid-base titration method is used to obtain the satisfactory results. Experiments show that the method is simple and fast , High accuracy, low cost, interference element separation than the net, eliminating the difficult separation of molybdenum, niobium, tantalum, can be applied to the analysis of high levels of scheelite and wolframite on the easy decomposition of white Tungsten ore available acid solution