Method for testing niobium content in niobium-iron alloy

Abstract

The invention discloses a method for testing niobium content in a niobium-iron alloy. The method comprises the steps of dissolving a niobium-iron alloy sample, depositing the niobium in the niobium-iron alloy in a niobium pentaoxide sediment mode, and weighing the mass of the niobium pentaoxide; preparing a niobium pentaoxide sediment solution, and preparing a standard solution, wherein the standard solution comprises a titanium standard solution and a tantalum standard solution; introducing the solution into which the niobium pentaoxide sediment is dissolved into an inductively coupled plasma atom emission spectrometer so as to test the spectral line intensity of the titanium and the tantalum, and obtaining the content of the titanium and the tantalum in the niobium pentaoxide sediment according to the spectral line intensity which is tested from the standard solution with known concentration; and subtracting the content of the titanium and the tantalum from the content of the niobium pentaoxide so as to obtain the content of the niobium in the niobium-iron alloy. By utilizing the technical scheme of the invention, the content of the titanium and the tantalum which are deposited together with the niobium in the niobium-iron alloy can be rapidly and accurately tested, thereby accomplishing the precise calculation on the niobium in the niobium-iron alloy.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgical analysis, in particular to a method for measuring niobium content in ferroniobium alloys. Background technique [0002] Ferro-niobium alloy is mainly added to the steelmaking process as an alloying raw material in iron and steel smelting, and it is expensive. Therefore, accurate analysis of niobium content is of great significance for raw material settlement, addition amount and cost control. [0003] At present, the analysis methods of niobium, titanium and tantalum in ferroniobium alloys are: GB / T3654.8-1983 Ferroniobium chemical analysis method-chromotropic acid photometric method for determination of titanium content; GB / T3654.1-1983 Ferroniobium chemical analysis method: on paper Chromatographic gravimetric determination of niobium and tantalum content and CSM 04 10 73 01-2001 Determination of ferroniobium-tantalum content-crystal violet benzene extraction photometry. Th...

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Problems solved by technology

The disadvantages of these methods are: only the content of all titanium and tantalum in ferroniobium alloy can be determined, and when measuring the niobium content in ferroniobium alloy, the titanium and tantalum in the obtained niobium pentoxide precipitation are only a part of ferroniobium alloy, so using The results measured by the above method cannot represent the content of titanium and tantalum in the precipitated niobium pentoxide, so the content of niobium in ferro-niobium alloy cannot be accurately calculated

Moreover, the traditional method can only measure one element at a time, and the operation steps are cumbersome. At the same time, it consumes a lot of chemicals, which is not environmentally friendly and energy-saving.

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