Method for determining phosphorus content of silicon ferrovanadium

The invention provides a method for determining the phosphorus content of silicon ferrovanadium. The method mainly includes the following steps: resolving silicon ferrovanadium by using nitric acid and hydrofluoric acid; volatilizing and removing silicon and getting rid of hydrofluoric acid in a sam...

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Bibliographic Details
Main Author TANG SHILU
Format Patent
LanguageChinese
English
Published 16.01.2013
Subjects
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
TESTING
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Summary:The invention provides a method for determining the phosphorus content of silicon ferrovanadium. The method mainly includes the following steps: resolving silicon ferrovanadium by using nitric acid and hydrofluoric acid; volatilizing and removing silicon and getting rid of hydrofluoric acid in a sample by means of sulfuric acid smoking, and then enabling phosphorus in a silicon ferrovanadium test solution to form a yellow complex, namely bismuth phosphomolybdenum yellow, together with bismuth and ammonium molybdate in a sulfuric acid medium through preparing a color developing solution; reducing the bismuth phosphomolybdenum yellow to bismuth phosphomolybdenum blue by using ascorbic acid; measuring the absorbance of the color developing solution at 700 nm of a spectrophotometer; and calculating mass fraction of phosphorus in silicon ferrovanadium by using a formula according to phosphorus mass obtained through a drawn working curve. The method can eliminate interference on determining the content of phosphoru
Bibliography:Application Number: CN20121362972