Method for determining nickel, chromium, silicon, manganese and phosphor in nickel-containing pig iron

Abstract

The invention relates to a method for determining nickel, chromium, silicon, manganese and phosphor in nickel-containing pig iron. The method is characterized in that five iron samples are taken in each batch of material, one spot is drilled on each iron sample, the drilled iron scraps are ground and pass through a 60-80-mesh target standard sieve; 10 ml of distilled water, 5 ml of concentrated nitric acid (65%) and 5 ml of concentrated hydrochloric acid (37%) are added in order in a 100 ml volumetric flask filled with 0.5000 g of the iron scrap sample for solving the sample, insoluble carbide is filtered and volume is metered to 100 ml; 0.4000 g of a pure iron matrix is added in a standard series solution; an inductively coupled plasma atomic emission spectrometry is used for determining the content of the elements of Ni, Cr, Si, Mn and P in the nickel-containing pig iron for analysis, an optimal analytical line for each element can be selected; spectrum interference of each coexisted element to the analytical line is inspected, and correction of an interference line in the analytical line can be carried out. The method is capable of shortening analysis period, mitigating labor intensity, increasing control capability and detection capability of the analysis result, reducing an application amount of a chemical reagent, reducing the waste liquid discharge, and reducing the analysis cost.

Description

technical field [0001] The invention belongs to the technical field of inspection and testing, and in particular relates to an analysis and determination method for the contents of Ni, Cr, Si, Mn and P in nickel-containing pig iron. Background technique [0002] For the determination of Ni, Cr, Si, Mn, and P in general pig iron, the existing technology is GB / T20125-2006 and Japanese Industrial Standard JIS_G1258-1-2007, but for the analysis of chromium content greater than 3.0 by inductively coupled plasma atomic emission spectrometry There are no corresponding technical standards and methods for nickel-containing pig iron. However, the existing technology has defects such as long analysis period, high labor intensity, poor quality control ability of analysis results, large amount of chemical reagents used, large amount of waste liquid discharge, and high analysis cost. Contents of the invention [0003] The invention provides a method for measuring the contents of Ni, Cr...

AI Technical Summary

Problems solved by technology

[0002] For the determination of Ni, Cr, Si, Mn, and P in general pig iron, the existing technology is GB / T20125-2006 and Japanese Industrial Standard JIS_G1258-1-2007, but for the analysis of chromium content greater than 3.0 by inductively coupled plasma atomic emission spectrometry There are no corresponding technical standards and methods for nickel-containing pig iron

However, the existing technology has defects such as long analysis cycle, high labor intensity, poor quality control ability of analysis results, large amount of chemical reagents used, large amount of waste liquid discharge, and high analysis cost.