Determination of High Grade Iron in Geological Experimental Testing
This paper introduces a new method for measuring iron——potassium dichromate method.Using hydrochloric acid to heat and decompose the sample,the iron in the iron ore is transformed into iron oxide.Using Tin(II)chloride to convert Fe3+ into Fe2+,using sodium tungstate as the indicator reagent,and then using Titanium(III)chloride to convert a small part of the remaining Fe3+ into Fe2+ until the color becomes tungsten blue.Then,using the standard solution of potassium dichromate to oxidize it until the blue turns pale to colorless.The iron content in iron ore was analyzed and calculated by adding the prepared mixed acid of sulfur and phosphorus,sodium diphenylamine sulfonate as the indicator reagent,and titrating with potassium dichromate solution.By conducting data statistical analysis on the accuracy and precision of the experimental results,and conducting method comparison experiments,the results showed that the method was simple to operate,fast in analysis speed,high in sensitivity,and had good accuracy and precision.There was no significant difference between the measurement results of this experimental method and the national standard method.
万方数据
维普
