Method for measuring contents of Nb and P in ferroniobium ball
A measuring method and technology for ferroniobium balls, which are applied in the field of analysis and measurement, can solve the problems of inability to accurately measure ferroniobium balls, etc., and achieve the effect of accurate measurement
Pending Publication Date: 2021-07-30
JIANGSU YONGGANG GROUP CO LTD
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Problems solved by technology
[0003] Aiming at the problem that the existing technology cannot accurately measure the Nb and P content in the ferroniobium ball, the present invention proposes a quantitative analysis method for determining the Nb and P content in the ferroniobium ball by using an inductively coupled plasma emission spectrometer
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[0023] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0024] The application principle of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0025] (1) Sample solution preparation:
[0026] Niobium-iron balls are crushed step by step by jaw crusher and roller crusher to less than 1mm, mixed and shrunk to about 200g, and ground to less than 0.125mm by vibrating mill.
[0027] Weigh about 0.40g of the sample, accurate to 0.0001g, place it in a 100mL polytetrafluoroethylene beaker, moisten it with a small amount of water, add 20mL of hydrochloric acid-hydrofluoric acid mixed solution (the volume ratio of hydrochloric acid, hy...
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The invention discloses a method for measuring the contents of Nb and P in ferroniobium balls, which comprises the following steps of preparing a sample solution, a blank solution and a calibration series solution based on an internal standard method, wherein the calibration series solution comprises M calibration solutions containing Nb and P, and the concentrations of Nb or P in any calibration solution are different, determining the calibration series solution by adopting an inductively coupled plasma emission spectrometer, and drawing a standard curve, and determining the blank solution and the sample solution by adopting an inductively coupled plasma emission spectrometer, and calculating the contents of Nb and P in the sample solution based on the drawn standard curve. According to the method, an ICP method is adopted for testing, and in the testing process, calibration series standard samples are prepared from ferrocolumbium standard samples, ferrophosphorus standard samples and spectrum pure iron powder which are different in mass. The sample and the calibration series standard sample are dissolved in the same way to prepare a solution. According to the content of Nb and P in the ferroniobium ball, the gradient concentration and range of the calibration series solution are reasonably configured, and the content of Nb and P in the ferroniobium ball can be rapidly and accurately measured.
Description
technical field [0001] The invention belongs to the field of analysis and measurement, and in particular relates to a method for determining the contents of Nb and P in ferroniobium balls. Background technique [0002] When smelting 400MPa rebar, ferroniobium balls (Nb41P5.5) are used instead of ferroniobium alloys (Nb60P0.3) as niobium additives in steelmaking production, which can significantly reduce the cost per ton of steel. Due to the low niobium content and high phosphorus content of ferroniobium balls, they do not meet the applicable scope of the national standard detection method for ferroniobium alloys, so they cannot be tested according to the standard method. In the steelmaking production process, accurate niobium and phosphorus content are needed to determine the amount of ferroniobium balls added, so as to control the chemical composition of molten steel. Therefore, it is urgent to find a method for quickly and accurately measuring the content of Nb and P in fe...
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IPC IPC(8): G01N21/73
CPCG01N21/73
Inventor 崔晓盟赵洁陈海燕侯兴辉
Owner JIANGSU YONGGANG GROUP CO LTD