A Full-Process Quantitative Analysis Method of the Content of Antimony Sulfide Based on Raman Spectrum

The content of antimony sulfide is an important index in the antimony flotation process, which directly determines the amount of reagent added and the parameters of control equipment in the process of antimony flotation. Chemical detection methods are mainly used for analysis at present time, and the operation is so complicated that the detection process takes a long time, which cannot meet the requirements of real-time during the flotation process. Based on the analysis technology of Raman spectroscopy, the purpose of this article is to propose a full-process quantitative analysis method of the Raman spectra of antimony contents in the raw ore samples based on Raman spectroscopy. Several strategies were proposed to establish the best model: these strategies included preprocessing methods (de-nosing, baseline correction), selecting characteristic wavelength for the quantitative analysis of antimony sulfide, and building a multivariate calibration model. According to the content of antimony sulfide in the main steps of antimony flotation, a multivariate calibration model of antimony sulfide content based on LWMKPLS for quantitative analysis is proposed. This model trains and tests the model separately by dividing the data of antimony sulfide contents in the raw ore samples into a training set and a validation set, which proves that the method can improve the accuracy of prediction of the quantitative analysis model. This method provides a new way for the quantitative analysis of the content of antimony sulfide minerals.