Rapid analysis method of high-content harmful element in blast furnace iron material

Abstract

The invention provides a rapid analysis method of a high-content harmful element in a blast furnace iron material. The method comprises the following steps: determining an instrument analysis condition; searching a standard sample drawing working curve; analyzing a sample; determining the sample which is out of an analysis range of the working curve during detection of the sample to be a harmful element sample with high content; determining a dilution standard sample from a harmful element sample with low content; mixing, diluting and melting the harmful element sample with high content by using the dilution standard sample to be made into plates; detecting through an X-ray fluorescence spectrophotometer, and calculating to acquire the content of the harmful element in the harmful element sample with high content. Compared with the traditional atomic absorption spectrometry, the rapid analysis method has the advantages that the sample is not needed to be dissolved in water solutions, and the dilution for many times is not needed, and therefore, the method is easy to operate and accurate in evaluation; moreover, the using mount of high-pure reagents is saved, and the cost is greatly reduced. Poor and impure iron materials are reasonably added for enterprises so as to prevent circulating enrichment of the harmful elements in a furnace, thus reducing the production cost and improving the economic benefit.

Description

technical field [0001] The invention belongs to the technical field of spectral analysis, and in particular relates to a rapid analysis method for high-content harmful elements in blast furnace iron materials. Background technique [0002] Potassium oxide, sodium oxide, lead, zinc, and arsenic are harmful elements in blast furnace ironmaking production. An increase in the load of harmful elements will lead to problems such as poor air permeability of the blast furnace charge column, increased shutdown rate, increased coke ratio, and reduced molten iron quality. , bringing challenges to blast furnaces running smoothly and improving blast furnace efficiency. In the current situation where the domestic steel market continues to slump, the contradiction between supply and demand is intensified, and the steel industry is facing extremely severe challenges, in order to turn losses into profits and enhance the competitiveness and viability of enterprises, it is necessary to adjust ...

AI Technical Summary

Problems solved by technology

[0003]At present, atomic absorption spectrometry is used to detect harmful elements in blast furnace iron materials. This method is cumbersome and takes a long time. It takes more than 240 minutes to detect one sample. The production efficiency is low, which affects the continuity of production, limits the blast furnace operation rate, and the labor intensity of the operators is high, which has a great impact on the cost of ironmaking, which greatly limits the application in production. The scope of extraction and element content is relatively strict, and it is widely used in the determination of low-content elements at present; and the preparation and detection of sample solutions take a long time, which cannot meet the timeliness requirements for the detection of harmful elements in iron materials, and the detection data of harmful elements can guide production limited role

However, when X-ray fluorescence spectroscopy is used for detection, it is difficult to collect high-level standard samples used for drawing curves. Therefore, the detection and analysis method for samples with high content of harmful elements beyond the analysis range of the working curve is still blank. If X-ray fluorescence spectroscopy is used The detection of high content of harmful elements in blast furnace iron will cause a large error between the detected value and the real value, which is inaccurate, and the exact content of harmful elements in the sample cannot be obtained. Compared with traditional wet chemical analysis, the sample needs to be dissolved into Aqueous solution, and high dilution is required, the demand for dissolving reagents is large, and the operation is cumbersome

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