Identification and classification method for phosphorite in different grades on basis of Raman spectrum and PCA-HCA (Principal Component Analysis-Hierarchical Cluster Analysis)

Abstract

The invention discloses an identification and classification method for phosphorite in different grades on the basis of Raman spectrums and PCA-HCA (Principal Component Analysis-Hierarchical Cluster Analysis) and belongs to the technical field of spectrum application. The method comprises the following steps: acquiring Raman spectrum original information of different samples of phosphorite of different grades by using a Raman spectrometer; preprocessing the acquired Raman spectrum original information, establishing an identification model according to the preprocessed Raman spectrum original information together with principal component analysis (PCA) and hierarchical cluster analysis (HCA), so as to classify the samples of phosphorite to be tested. The method is capable of simplifying pretreatment steps of samples, avoiding tedious chemical processes and shortening the detection time, has the advantages of rapidness, high accuracy, nondestructiveness and the like, has significant promotion functions on identification on phosphorite of different grades, provides a novel idea for rapid, real-time and on-line detection in wells, and has great significances in improving phosphorite exploitation efficiency, reducing exploitation cost and protecting the environment.

Description

technical field [0001] The invention relates to the field of spectrum application technology, in particular to a method for identifying and classifying phosphate rocks of different grades based on Raman spectroscopy and PCA-HCA. Background technique [0002] Phosphate rock is an important strategic resource in my country. It is not only an important mineral raw material for various phosphorus products, but also the material basis for food safety and fine phosphorus chemical industry. The total reserves of phosphate rock in my country are abundant, but there are few rich ores. The grade of 90% of the phosphate rock is lower than 26%, and the average grade is only 16.85%. Most of the ore needs to be processed before it can be used. Evaluating the grade of phosphate rock is an important link in the beneficiation process. In my country, the grade of phosphate rock refers to the content of P2O5 in phosphate rock. Through the determination of effective P2O5 content, the primary sc...

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Problems solved by technology

However, most of these methods need to be carried out in the laboratory, and the detection process is relatively cumbersome. Some methods require complex pretreatment of samples, which cannot be well adapted to today's rapid detection of a large number of samples, especially for on-site detection and analysis in mines. need

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