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Method for measuring content of sulfur in coal by utilizing energy chromatic dispersion X-ray fluorescence analysis

A technology of energy dispersion and fluorescence analysis, which is applied in the field of analysis and detection, can solve the problem of low sensitivity of sulfur element, and achieve the effect of quantitative analysis, fast measurement and cost saving

Inactive Publication Date: 2014-12-17
SHENYANG NORMAL UNIV
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Problems solved by technology

[0003] Based on the deficiencies of the energy dispersive X-ray fluorescence analysis technology in the measurement of sulfur elements, the present invention provides a reasonable and effective energy dispersive X-ray fluorescence analysis for the problem of low sensitivity of detecting sulfur elements by energy dispersive X-ray fluorescence spectroscopy Applied to the measurement method of sulfur content

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  • Method for measuring content of sulfur in coal by utilizing energy chromatic dispersion X-ray fluorescence analysis
  • Method for measuring content of sulfur in coal by utilizing energy chromatic dispersion X-ray fluorescence analysis
  • Method for measuring content of sulfur in coal by utilizing energy chromatic dispersion X-ray fluorescence analysis

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Embodiment Construction

[0013] The experiment refers to the Ashka method in the national standard GB / T 214-2007 "Determination of total sulfur in coal" to pretreat the coal sample. The specific implementation process is as follows figure 1 Shown:

[0014] ①Weigh 1g of dry coal sample with a particle size less than 0.2mm and 2g of Ashka reagent (mixed with magnesium oxide and anhydrous sodium carbonate at a mass ratio of 2:1) in a 30ml porcelain dry pot and mix evenly, then use 1g of Ashka The reagent is covered on the coal sample;

[0015] ② Move the dry pot containing the coal sample into a well-ventilated muffle furnace, and gradually heat it from room temperature to 840°C in 1.5 hours. Must be kept at this temperature for 2h. Using the temperature programming control device of the muffle furnace, the temperature of the muffle furnace was slowly raised from room temperature to 840° C. in the course of 1.5 h. The sample is burned in the muffle furnace, and its reaction formula mainly includes:

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Abstract

The invention relates to a method for measuring the content of sulfur in coal by utilizing energy chromatic dispersion X-ray fluorescence analysis, and mainly solves the problem that the sensitivity and the efficiency for detecting a sulfur element in the coal are low in the prior art. The method comprises the following steps of firstly pre-treating a coal sample, and preparing a standard sample and a test sample; measuring a barium element in the test sample by utilizing an energy chromatic dispersion X-ray fluorescence analyzer, detecting the fluorescent number of the barium element, and substituting the detected fluorescent number of the barium element in a calibration curve to obtain the percentage composition of the barium element in the test sample; and calculating the percentage composition of the sulfur element in the coal sample according to a chemical number relation between the sulfur and barium in the sample. The measurement of the sulfur content in the coal is realized by adopting an indirect measuring method. The method has characteristics of rapidness in measurement and easiness in operation.

Description

technical field [0001] The invention relates to a method for measuring sulfur content in coal by using energy dispersive X-ray fluorescence analysis, belonging to the technical field of analysis and detection. Background technique [0002] At present, the methods for detecting the content of light elements in substances mainly include chemical analysis and instrumental analysis. Chemical analysis methods can be divided into specific measurement methods such as burning lamp method, tube furnace method, gravimetric method, neutralization titration method, colorimetric method and volumetric method for different elements and sample types. Simple use of ordinary chemical methods can accurately quantitatively analyze light elements, but the steps are cumbersome, time-consuming, and require operators to have relatively rich chemical knowledge and high experimental quality, which makes the instrumental analysis method more difficult. Increasingly favored by analytical users. At pr...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/223
Inventor 邓玉福黄丹马跃刘宏军项亚威谷珊
Owner SHENYANG NORMAL UNIV
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