Method for detecting total iron content in iron ore

A detection method, iron ore technology, applied in chemical analysis by titration method, material analysis by observing the influence of chemical indicators, analysis by making materials undergo chemical reactions, etc., can solve mercury and chromium pollution, etc. problems, achieve high reduction efficiency, inhibit reduction, and eliminate secondary pollution

Pending Publication Date: 2022-03-08
河南资环矿业科技有限公司
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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

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Embodiment Construction

[0035] The following clearly and completely describes the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0036] A kind of detection method of total iron content in iron ore

[0037] S1. Preprocessing

[0038] Take 0.2g iron ore sample, add 0.5g sodium fluoride, 1g sodium bicarbonate and 10mL hydrochloric acid solution with a concentration of 1.2g / mL in sequence, heat and stir until completely dissolved;

[0039] Add 0.5g sodium bicarbonate again, stir to dissolve and cool to room temperature with running water;

[0040] Utilize the sulfuric acid solution that concentration is 1.84g / mL and the phosphoric acid solution that concentrati...

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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 ...

Claims

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Application Information

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IPC IPC(8): G01N31/16G01N21/78
CPCG01N31/16G01N21/78Y02P10/20
Inventor 周杰强崔向鹤赵炎
Owner 河南资环矿业科技有限公司
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