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Quantitative analysis method for total iron and alkalinity in sinter

A quantitative analysis and sintering technology, which is applied in the field of spectral quantitative analysis, can solve the problems that the single-variable correction model cannot satisfy the quantitative analysis, and achieve the effect of improving production line capacity, avoiding too slow correction speed, and broad market application prospects

Inactive Publication Date: 2018-07-10
NANJING UNIV OF INFORMATION SCI & TECH
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Problems solved by technology

Due to laser energy fluctuations, sample inhomogeneity, and matrix effects, the univariate calibration model cannot meet the needs of quantitative analysis

Method used

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  • Quantitative analysis method for total iron and alkalinity in sinter
  • Quantitative analysis method for total iron and alkalinity in sinter
  • Quantitative analysis method for total iron and alkalinity in sinter

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Embodiment 1

[0031] The laser-induced breakdown spectroscopy system in this example includes a Q-switched Nd:YAG laser with a wavelength of 1064nm, a laser repetition rate of 1Hz, a pulse width of 1ns, and a laser pulse energy of 150mj; a delayer with a delay accuracy of 10ns; a three-channel fiber optic spectrometer , the wavelength range is 200-500nm, the resolution is 0.07nm, tablet press. During the experiment, in order to obtain the spectrum with good signal-to-noise ratio, each spectrum is obtained by 20 signal accumulations. In order to prevent the detection of bremsstrahlung pulsed laser, the optimized laser energy is 80mJ, and the delay time is 3μs.

[0032] 1) Sample preparation: select 30 sinter samples with known composition content (Shigang Jingcheng Equipment Technology Co., Ltd.), each sinter sample is ground by a ball mill and passed through a 200-mesh sieve. In order to facilitate the experimental measurement, each sample was made into a thin slice with a thickness of abo...

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Abstract

The invention discloses a quantitative analysis method for total iron and alkalinity in sinter, and particularly relates to a quantitative analysis method for the total iron and alkalinity in sinter on the basis of a nuclear extreme learning machine combined with laser induced breakdown spectroscopy. The method comprises the steps of sample preparation, laser spectroscopy data obtaining, extreme learning machine correction model building, nuclear extreme learning machine model building, to-be-detected sinter sample detection and the like. The method is high in analysis speed and high in accuracy and has great significance for guidance on the steel making process.

Description

technical field [0001] The invention belongs to the technical field of spectral quantitative analysis, and relates to a quantitative analysis method for total iron and alkalinity in sintered ore, specifically a method for analyzing total iron and alkalinity in sintered ore based on nuclear extreme learning machine combined with laser-induced breakdown spectrum quantitative analysis method. Background technique [0002] Sinter is the main raw material for blast furnace smelting (more than 80%), and its quality is of great significance to the continuous and stable development of the iron and steel industry. It is sintered on the sintering equipment after mixing various iron-containing raw materials, auxiliary materials and appropriate fuels and solvents according to the process requirements. Total iron is an important control element in blast furnace smelting, and its content plays a decisive role in the quality of sinter. Alkalinity is an important indicator of the sinterin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/63G01N1/28
CPCG01N1/28G01N21/63
Inventor 丁宇陈海秀严飞
Owner NANJING UNIV OF INFORMATION SCI & TECH
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