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Method of determining silicon content in ferro-silico aluminum through silico-molybdenum blue colorimetric method

A silicon-molybdenum blue colorimetric method and a technology of silicon content, applied in the direction of color/spectral characteristic measurement, etc., can solve the problems of slow operation and long process, achieve the effect of shortening the operation process, accurate and reliable data, and reducing labor expenditure

Inactive Publication Date: 2016-01-06
INNER MONGOLIA BAOTOU STEEL UNION
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Problems solved by technology

[0004] In order to solve the problem of long process and slow operation when the existing method is used to measure silicon in silicon-aluminum-iron, and at the same time speed up the operation and reduce costs, the invention provides a more rapid, accurate and efficient method for determining the silicon content in silicon-aluminum-iron Methods

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Embodiment Construction

[0024] The above-mentioned and other technical features and advantages of the present invention will be described in more detail below in conjunction with the embodiments.

[0025] 1. Method summary:

[0026] This method uses sodium hydroxide solution to dissolve most of the samples, then add dilute hydrochloric acid-nitric acid to dissolve the remaining samples, heat until the samples are completely dissolved, cool to room temperature, transfer to a 250mL volumetric flask, divide 10mL into a 100mL volumetric flask, Ammonium molybdate is added to form silicon molybdenum yellow, oxalic acid is added to mask interfering elements, ferrous ammonium sulfate is added to form silicon molybdenum blue, and the absorbance of the solution is measured with a spectrophotometer. The standard sample with the same species and similar content along with the sample is converted to the sample content value.

[0027] 2. Reagents:

[0028] 2.1 Nitric acid (density 1.42g / mL)

[0029] 2.2 Hydroch...

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Abstract

The invention discloses a method of measuring silicon content in ferro-silico-aluminum through a silico-molybdenum blue colorimetric method and aims at providing the method which is faster, more accurate and more efficient in determining silicon content in ferro-silico aluminum. According to the method, a sodium hydroxide solution is adopted to dissolve most test samples; next, diluted hydrochloric acid-nitric acid is added for dissolving remaining test samples; the test samples are heated, dissolved completely, cooled to room temperature and transferred to a volumetric flask; a certain amount of the solution is taken out and placed into another volumetric flask, ammonium molybdate is added to generate silico-molybdenum yellow, oxalic acid is added to cover interference elements, ammonium ferrous sulfate is added to generate silico-molybdenum blue, and the absorbance of the solution is determined through a spectrophotometer; conversion of the content value of the test samples is conducted through standard samples with similar content of the same variety as the test samples.

Description

technical field [0001] The invention relates to the technical field of ferroalloy analysis, in particular to a method for measuring silicon content in silicon-aluminum-iron by using a silicon-molybdenum blue colorimetric method. Background technique [0002] Ferrosilicon is a compound deoxidizer used in steelmaking production. The density of ferrosilicon is higher than that of pure aluminum, and it is easier to enter molten steel. It is used to improve the shape of inclusions and reduce the content of gas elements in molten steel. It is an effective new technology for quality, cost reduction, and aluminum saving. The use of silicon-aluminum-ferroalloy in the steelmaking process is more efficient than using pure aluminum alone as a deoxidizer. Deoxidation with silicon-aluminum-iron alloy can form products with low melting point, which are easy to float and improve steel quality, especially suitable for deoxidation requirements of continuous casting molten steel. Practice has...

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Application Information

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IPC IPC(8): G01N21/31
Inventor 戴文杰常欢王宴秋刘建华刘钢耀
Owner INNER MONGOLIA BAOTOU STEEL UNION
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