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Analysis method of phosphorus content in phosphoric pig iron

A technology of phosphorus content and pig iron, applied in the direction of electrical excitation analysis, thermal excitation analysis, material excitation analysis, etc., can solve the problems of long time-consuming detection method and large error of detection results, shorten detection time, increase strength and avoid loss Effect

Inactive Publication Date: 2018-07-06
LIUZHOU IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a detection method of phosphorus content in pig iron, which can solve the problems of long time consumption and large error of detection results in existing detection methods

Method used

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  • Analysis method of phosphorus content in phosphoric pig iron
  • Analysis method of phosphorus content in phosphoric pig iron
  • Analysis method of phosphorus content in phosphoric pig iron

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Embodiment 1~embodiment 3 is the embodiment that makes working curve, and only the size of calibration sample is different in embodiment 1, embodiment 2 and embodiment 3, all the other features are the same;

[0055] Example 1

[0056] Take the pig iron from the previous batch, and select a small block with an analysis surface area of ​​30mm×30mm and a height of 30 mm on the pig iron as a calibration sample. The analysis surface of the calibration sample has no shrinkage cavity, no inclusions, and no cracks, and then the analysis surface Polish with a 40-grit disc emery cloth;

[0057] The standard sample was determined by ICP spectrometry, and then measured by the spark source atomic emission spectrometer according to the above-mentioned working parameters, and the interference of the element on the phosphorus content was corrected according to formula 1, and the correction coefficient KCr=-0.618 was obtained, and after regression Obtain the working curve of phosphoru...

Embodiment 2

[0059] The analytical surface area of ​​the calibration sample in Example 2 is 30 mm×45 mm, and the height is 50 mm; other features are the same as in Example 1.

Embodiment 3

[0061] The analysis surface area of ​​the calibration sample in Example 3 is 50 mm×50 mm, and the height is 10 mm; other features are the same as in Example 1.

[0062] What needs to be explained is that once the working curve is made, it can be used for a long time without requiring a working curve for each detection of the sample to be tested, and it is not necessary to process the calibration sample for each detection.

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Abstract

The invention discloses an analysis method of phosphorus content in phosphoric pig iron, and relates to the technical field of component analysis of pig iron. According to the method, a method utilizing spark source atomic emission spectrometer is used for detecting, so that the relative standard deviation is small, and the accuracy is high; compared with an inductively coupled plasma atomic emission spectrometry with high accuracy, the method has the advantages that the accuracy in detecting phosphorus content in phosphoric pig iron is high; and the requirement of detection on outsourced pigiron is met.

Description

technical field [0001] The invention relates to the technical field of pig iron component analysis, in particular to a method for detecting phosphorus content in pig iron. Background technique [0002] Pig iron is an iron-carbon alloy with a carbon content greater than 2.11%. It is a product of iron ore smelted in a blast furnace. The carbon content in industrial pig iron is generally 2.11%-4.3%. According to the different forms of carbon in pig iron, it can be Divided into steelmaking pig iron and foundry pig iron. In addition to iron, pig iron also contains elements such as Si, Mn, phosphorus, S, As, Ni, Cr, Cu, V, Ti, etc. These elements have a certain impact on the performance of pig iron; the phosphorus content in pig iron is a harmful element. The existence of phosphorus increases the hardness and brittleness of pig iron, which affects the quality of pig iron. The higher the phosphorus content, the worse the quality of pig iron; in actual production, pig iron with hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/67G01N21/73
CPCG01N21/67G01N21/73
Inventor 刘向阳陈海牛芬罗玉华韦向东蒙成志陈忠超
Owner LIUZHOU IRON & STEEL
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