Method for measuring ferrous oxide content in iron ore

Abstract

The invention discloses a method for determining the content of ferrous oxide in iron ore. The method comprises steps of a, weighing an iron ore sample, putting the sample into a conical flask, sequentially adding potassium fluoride, sodium bicarbonate and hydrochloric acid, covering with a porcelain cover, putting the flask on an electric furnace, and heating to boiling; b, transferring the diluted solution obtained in the step a into a beaker special for a potentiometric titrator; and c, inserting an indicating electrode and a reference electrode of the potentiometric titrator into the beaker special for the potentiometric titrator in the step b, titrating by adopting potassium dichromate standard solution, starting the potentiometric titrator, and starting titration. The method is advantaged in that problems that reliability of the detection result is easily influenced by indicator end point judgment and subjective judgment of different analysts in the existing measurement, ferrousoxide is extremely easy to oxidize in the decomposition and titration processes, and the analysis result is relatively low can be avoided.

Description

technical field [0001] The invention relates to the technical field of methods for measuring ferrous oxide, in particular to a method for measuring the content of ferrous oxide in iron ore. Background technique [0002] At present, the analysis method of iron ore ferrous oxide mainly adopts the titration method. As a classical chemical analysis method, compared with the instrument analysis method, the titration method is more perfect and lower in cost, but it is limited by the end point of the indicator during the determination process. Judgment and the subjective judgment of different analysts affect the reliability of the test results, and ferrous oxide is easily oxidized during the decomposition and titration process. After the sample is completely decomposed, the solution must be cooled and titrated quickly, otherwise the analysis result will be low. Contents of the invention [0003] For above-mentioned technical problem, the present invention provides a kind of assay...

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Problems solved by technology

[0003] For above-mentioned technical problem, the present invention provides a kind of assay method of ferrous oxide content in the iron ore, can avoid present assay, be subject to indicator endpoint judgment and the subjective judgment of different analysts easily and influence the reliability of detection result, Moreover, ferrous oxide is easily oxidized during the decomposition and titration process, resulting in low analysis results.