Method for determining oxide component content of cement raw meal by near infrared diffuse reflection spectrum

A technology of near-infrared spectrometer and cement raw material, which is applied in the direction of material analysis through optical means, material analysis using wave/particle radiation, and measuring devices, etc. It can solve the problems of large fluctuations in cement quality, long time consumption, and adjustment of raw material ratio. Hysteresis and other problems can be eliminated to achieve the effects of eliminating noise and useless information, accurate measurement results, and improving prediction performance

Active Publication Date: 2018-12-25
SHANDONG UNIV +1
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Problems solved by technology

[0003] Chemical analysis method and X-ray fluorescence method are commonly used inspection methods in the cement industry. The process of chemical analysis method is complicated and time-consuming. X-ray fluorescence method must be equipped with special sample preparation equipment, which is costly, radioactive, and harmful to health. Although the measurement speed Relatively fast (30-60min), it is

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  • Method for determining oxide component content of cement raw meal by near infrared diffuse reflection spectrum
  • Method for determining oxide component content of cement raw meal by near infrared diffuse reflection spectrum
  • Method for determining oxide component content of cement raw meal by near infrared diffuse reflection spectrum

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Embodiment 1

[0082] Described in this embodiment is a kind of near-infrared diffuse reflectance spectroscopy combined with cooperative interval partial least squares method to quickly determine the main components of cement raw meal (CaO, SiO 2 、Al 2 o 3 , Fe 2 o 3 ) content, the method comprises the following steps:

[0083] (1) Collect cement raw meal samples;

[0084] Collect powdered cement raw material samples from the production line of Shandong Qufu Zhonglian Cement Plant through the automatic sampler at the material sampling port;

[0085] (2) Determination of the main components (CaO, SiO, 2 、Al 2 o 3 , Fe 2 o 3 ) content, to provide standard data for subsequent modeling using the cooperative interval partial least squares method;

[0086] Deeply grind the powdered cement raw meal sample; take 100g of the ground cement raw meal sample and put it into a mold to press it into a cake; put the pressed cake sample into an X-ray fluorescence analyzer to measure the amount of t...

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Abstract

The invention discloses a method for determining oxide component content of cement raw meal by near infrared diffuse reflection spectrum. The method comprises the following steps of: determining the main oxide component content of the collected cement raw meal sample by adopting an X-ray fluorescence method to obtain the standard of each sample component; dividing the whole cement raw meal sampleinto a calibration set and a verification set to obtain the near infrared diffuse reflection spectrum thereof; performing smoothing processing on the near infrared diffuse reflection spectrum, establishing a calibration model by adopting a cooperation interval partial least square method, and determining the relation between the each sample content and the near infrared diffuse reflection spectrum; and performing external verification on the calibration model by using the verification set sample, comprehensively judging the model performance based on the calibration set correlation coefficient, the cross validation root mean square error, the verification set correlation coefficient, and the predicted root mean square error, and analyzing the correlation between a predicted value and a real value.

Description

technical field [0001] The invention relates to a method for measuring the content of oxide components in cement raw meal by near-infrared diffuse reflectance spectroscopy. Background technique [0002] Cement is an indispensable basic material in modern economic construction, and its quality is closely related to the safety of human life and property. In the cement production process, the ratio of various raw materials (clay, limestone, steel slag, etc.) directly determines the quality of cement. Cement is mainly composed of CaO, SiO 2 、Al 2 o 3 and Fe 2 o 3 Therefore, in industrial production, it is necessary to control the ratio of raw materials by detecting the content of these oxides in cement raw materials to ensure the quality of cement. [0003] Chemical analysis method and X-ray fluorescence method are commonly used inspection methods in the cement industry. The process of chemical analysis method is complicated and time-consuming. X-ray fluorescence method mu...

Claims

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Application Information

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IPC IPC(8): G01N21/359G01N23/223
CPCG01N21/359G01N23/223G01N2021/3595G01N2201/129
Inventor 姜明顺杨振发隋青美肖航张雷冯德军张法业王孝红路士增
Owner SHANDONG UNIV
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