Method for detecting total iron content in iron ore

Abstract

The invention belongs to the technical field of total iron content detection, and discloses a method for detecting the total iron content in iron ore, which comprises the following steps: S1, taking an iron ore sample, sequentially adding sodium fluoride, sodium bicarbonate and a hydrochloric acid solution, heating and stirring until the sodium fluoride, the sodium bicarbonate and the hydrochloric acid solution are completely dissolved; adding sodium bicarbonate again, stirring and dissolving, and synchronously cooling to room temperature by flowing water; sequentially adding sulfur-phosphorus mixed acid and a manganese sulfate solution, and uniformly mixing to obtain a pretreatment solution; s2, heating the pretreatment solution, adding a zinc chloride solution while stirring until the pretreatment solution becomes light yellow, and then continuously heating for 2 minutes; cooling the pretreated solution to room temperature with flowing water, dropwise adding a sodium tungstate solution, and adding a titanium trichloride solution while stirring until tungsten blue appears in the pretreated solution to obtain a sample solution; s3, taking the sample solution in which tungsten blue disappears, dropwise adding an indicator sodium diphenylaminesulfonate, then titrating with a potassium permanganate standard solution, and recording the consumed volume V of the potassium permanganate standard solution when the sample solution becomes purple and does not fade within 30 seconds; and S4, calculating a result.

Description

technical field [0001] The invention belongs to the technical field of total iron content detection, and in particular relates to a detection method for total iron content in iron ore. Background technique [0002] At present, the determination of total iron content in iron ore generally adopts the potassium dichromate titration method of mercuric chloride. This method has strong applicability and high accuracy, but the mercury and chromium used in this method are toxic substances. It will cause serious environmental pollution and even affect the health of measuring personnel. [0003] In recent years, there have been more and more reports on mercury-free detection methods, among which zinc powder reduction potassium dichromate titration method is a typical mercury-free detection method, but this method has not completely eliminated the application and pollution of chromium, so in The invention provides a mercury-free and chromium-free green detection method. Contents of ...

AI Technical Summary

Problems solved by technology

[0004] In view of this, in order to solve the pollution problem of mercury and chromium in the existing detection method, the object of the present invention is to provide a kind of detection method of total iron content in iron ore