Method for quickly measuring ultra-low carbon and ultra-low sulfur in steel by atomic emission spectrometry

Abstract

The invention discloses a method for quickly measuring ultra-low carbon and ultra-low sulfur in steel by the atomic emission spectrometry, which comprises the following steps of: (1) preparing a spectrum sample control demo by an ultra-low carbon and ultra-low sulfur steel billet, and carrying out a homogeneity test on the prepared spectrum sample control demo on an atomic emission spectrometer; (2) preparing the spectrum sample control demo into a steel scrap sample on a drilling machine, and valuing the content of carbon and sulfur in the steel scrap sample of the drilled steel scrap sample by a corrected infrared carbon sulfur instrument; (3) regulating the atomic emission spectrometer before the atomic emission spectrometer is used, and correcting by a valued spectrum control sample after a working curve is corrected; and (4) preparing an analysis sample with a milling method, and detecting by the corrected atomic emission spectrometer to measure the content of the ultra-low carbon and the ultra-low sulfur in the analysis sample. The method is combined with the characteristic of high accuracy of an infrared absorption method, and stokehole steelmaking ultra-low carbon and ultra-low sulfur can be quickly and accurately measured in a mode of valuing the spectrum control sample with the infrared absorption method.

Description

technical field [0001] The invention relates to a metal chemical analysis method, in particular to a method for quickly measuring ultra-low carbon and ultra-low sulfur in steel by atomic emission spectrometry. Background technique [0002] The accurate analysis of ultra-low carbon (generally considered to be ≤100ppm) will provide a strong analytical guarantee for the development of high value-added products in furnace steelmaking and smelting, but it has always been one of the difficult problems in the international and domestic analysis circles. The commonly used infrared carbon-sulfur analyzer has the disadvantages of long analysis period, great influence on sample preparation, and is not suitable for rapid and accurate determination before steelmaking furnace. The analysis of ultra-low carbon and ultra-low sulfur by atomic emission spectrometer has the following difficulties: 1. Restrictions on spectral standard samples: there are no ultra-low carbon and ultra-low sulfur ...

AI Technical Summary

Problems solved by technology

The commonly used infrared carbon-sulfur analyzer has the disadvantages of long analysis period and great influence on the sample preparation process, which is not suitable for rapid and accurate determination before the steelmaking furnace

The analysis of ultra-low carbon and ultra-low sulfur by atomic emission spectrometer has the following difficulties: 1. Restrictions on spectral standard samples: there are no ultra-low carbon and ultra-low sulfur spectral standard samples available in China, and foreign ultra-low carbon and ultra-low sulfur spectral standard samples are due to organizational structure, The composition structure and other reasons are not very suitable for rapid analysis in front of the furnace; Second, the analysis conditions are relatively strict: argon purity, argon pressure, electrodes, sample preparation, working curves, etc.

Images