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Raman spectrum quantitative determination method applicable to carbon sources in blast furnace gas dust

A quantitative detection method, blast furnace gas ash technology, applied in Raman scattering, material excitation analysis, etc., can solve the problems of heavy workload, laborious, large errors, etc.

Inactive Publication Date: 2014-01-22
WUHAN IRON & STEEL (GROUP) CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the workload of this method is quite large, it is very laborious to practice, the operability is not strong, and the error is often large, so it is not suitable for a commonly used method.

Method used

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  • Raman spectrum quantitative determination method applicable to carbon sources in blast furnace gas dust
  • Raman spectrum quantitative determination method applicable to carbon sources in blast furnace gas dust
  • Raman spectrum quantitative determination method applicable to carbon sources in blast furnace gas dust

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Embodiment 1

[0037] 1) Grind the collected coal samples and coke samples to a particle size range of 150-202um, dry the ground coal powder samples and spread them on a corundum porcelain boat, place them in a tube furnace, and pass them into Nitrogen forms an inert atmosphere, and then starts the heating process to produce coal char and coke that have been heat-treated at different high temperatures. This is to better reflect the difference in carbon structure of samples under different conditions in the Fourier transform Raman spectrum. Due to the different heat treatment temperatures, different durations have no difference in the final sample spectra. That is, the heat treatment lasting for 30 minutes has completely affected the carbon structure of the carbonaceous material, and a longer heating time has no effect on the carbon structure. The heat treatment process of this technology is to raise the temperature in the heating furnace to a temperature range of 800-2000 ° C at a certain h...

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Abstract

The invention provides a quantitative determination method for carbon sources in blast furnace gas dust. The quantitative determination method comprises calibration and detection steps, wherein the calibration step comprises the steps: obtaining Raman spectrums of various coke samples with different coke mass ratios and determining a D peak and G peak strength ratio ID / IG according to the Raman spectrums, and a trough lowest point V peak and G peak strength ratio IV / IG between a D peak and a G peak, and taking the D peak and G peak strength ratio ID / IG and the trough lowest point V peak and G peak strength ratio IV / IG as evaluation indexes to establish a mapping relation between the ratio of carbon-containing substances in coal of the sample or a coke sample and the evaluation indexes; the detection step comprises the steps: carrying out a Raman spectrum analysis on the blast furnace gas dust to be detected and determining the ID / IG and the IV / IG; matching on the established mapping relation according to the two strengths; and determining the ratio of the carbon-containing substances of the coal or the coke of the blast furnace gas dust to be detected so as to obtain the carbon sources. According to the quantitative determination method for the carbon sources in the blast furnace gas dust, the ratio of the carbon-containing substances of the coal or the coke can be quantitatively analyzed based on the Raman spectrum analysis; the method is reliable, simple and rapid to operate, strong in applicability and low in cost.

Description

technical field [0001] The invention belongs to the field of coal component measurement, and more specifically relates to a quantitative detection method for carbon sources in blast furnace gas ash. Background technique [0002] It is an important direction for the sustainable development of blast furnace production to reduce the amount of coke used and increase the amount of pulverized coal injection in the ironmaking process. With the increase of the amount of coal injection, due to the limited combustion space in the tuyere area of ​​the blast furnace, incomplete combustion of pulverized coal will occur to varying degrees, and the carbon content in the blast furnace dust will increase accordingly, and the utilization efficiency of pulverized coal will be limited. Therefore, how to better organize the combustion process after coal injection in the blast furnace and provide guidance for increasing the amount of coal injection in the blast furnace and improving the replaceme...

Claims

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Application Information

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IPC IPC(8): G01N21/65
Inventor 陈令坤孙路石薛改凤肖英邹祖桥
Owner WUHAN IRON & STEEL (GROUP) CORP
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