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

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...

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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 also difficult to meet the timeliness of industrial control

As the automation level of the cement production line increases year by year and the production scale increases day by day, the above two detection methods cannot reflect the changes in the content of cement raw materials in a timely manner, resulting in a lag in the adjustment of raw material ratios and large fluctuations in cement quality.

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