Method for measuring content of silicon in ferromanganese

Abstract

The invention discloses a method for measuring content of silicon in ferromanganese. A standard curve method is adopted, and the measuring method comprises the following steps: heating and dissolving a sample in a water bath by adopting nitric acid and hydrofluoric acid, adding carbamide to decompose and destroy interference of nitrogen oxides, complexing excessive fluorinion by using saturated boric acid, and allowing silicic acid and molybdic acid to yellow silicon molybdenum heteropoly acid under the acidity that c(H<+>) is equal to 0.1-0.6mol / L; adding a sulphosate mixed acid to eliminate interference of phosphorus and arsenic, reducing silicon molybdenum yellow into silicon molybdenum blue by using ascorbic acid, and finally measuring the absorbance. According to the method, after the ferromanganese is dissolved, the interference is eliminated by utilizing various reagents, the silicon is generated into silicon molybdenum blue, the corresponding absorbance is measured, and the content of silicon is obtained. The experiment proves that the method is easy, convenient and rapid to operate, the measured silicon content result is high in accuracy and high in precision, and measurement of silicon in high / medium / low-carbon ferromanganese can be met. The method does not need precious instruments or reagents and has the characteristics of low analysis cost, accuracy and practicality.

Description

technical field [0001] The invention relates to a method for determining alloy components, in particular to a method for determining silicon content in ferromanganese. Background technique [0002] The national standard for the determination of silicon content in ferromanganese is the perchloric acid gravimetric method. Due to the cumbersome operation of the gravimetric method, the analysis period is long, and the silicon content in ferromanganese is low, which will be lost after repeated filtration and washing. , the result is low. It is also useful to use inductively coupled plasma emission spectrometry for determination. Although it saves time, the cost of equipment, spare parts, and argon gas consumption is high, and the plasma spectrometer needs to be operated by a special person. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for measuring silicon content in ferromanganese with simple operation, ...

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Problems solved by technology

[0002] The national standard for the determination of silicon content in ferromanganese is the perchloric acid gravimetric method. Due to the cumbersome operation of the gravimetric method, the analysis period is long, and the silicon content in ferromanganese is low, which will be lost after repeated filtration and washing. , the result is low

It is also useful to use inductively coupled plasma emission spectrometry to measure. Although it saves time, the cost of equipment, spare parts, and argon gas consumption is high, and the plasma spectrometer needs to be operated by a special person.

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