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目前,多数水泥厂采用磷酸溶样—重铬酸钾容量法快速测定生料氧化铁的含量,但其空白值的测定方法很不一致,本文就有关问题谈点浅见。供同行们参考。一、原理重铬酸钾法测铁的空白值不能按通常的方法测定,其主要原因是:重铬酸根直接氧化指示剂(二苯胺或二苯胺磺酸)的反应很慢,将消
At present, most cement plants use phosphoric acid solution-potassium dichromate volumetric method to quickly determine the content of iron oxide in raw meal, but the method for determining the blank value is very inconsistent. For colleagues for reference. First, the principle of potassium dichromate method measured iron blank value can not be determined by the usual method, the main reason is: dichromate direct oxidation indicator (diphenylamine or diphenylamine sulfonic acid) reaction is very slow, will eliminate