Application of wavelet transform in curve processing for thermo-gravimetric analysis of iron ore
CHEN Ying-na1, YING Hai-song*1, WANG Yu-he2, LI Fei-zhen3, LI Xue-lian1, YU Chun-hui1
1.Beilun Entry-Exit Inspection & Quarantine Bureau,Ningbo 315800,China; 2. Institute of Economics of the Chinese Academy of Social Sciences,Beijing 100836,China; 3.Ningbo University,Ningbo 315211,China
Abstract：The wavelet transform is an emerging technology in chemometrics, and it has been used in wave spectrum analysis of instrumental determination. The thermo-gravimetric analysis (TGA) is a kind of analysis method which is widely used in material fields. As long as there is mass change in heating of materials, TGA can be used. Therefore, TGA is always applied to the thermal stability and mineral analysis of materials. Sometimes, however, the TGA curve is hardly distinguished due to the interference of unknown factors.The wavelet tool box in MATLAB was used to analyze the TGA curve of iron ores. The noise was filtered and removed by 5-order 2-layer resolution of Daubechies wavelet. The overlapping peaks were separated by wavelet derivative transform. Finally, the resolution ratio of TGA curve could be improved.
陈颖娜, 应海松, 王于鹤, 李斐真, 李雪莲, 余春晖. 小波变换在铁矿热重矿物分析曲线处理的应用[J]. 冶金分析, 2016, 36(10): 30-33.
CHEN Ying-na, YING Hai-song, WANG Yu-he, LI Fei-zhen, LI Xue-lian, YU Chun-hui. Application of wavelet transform in curve processing for thermo-gravimetric analysis of iron ore. , 2016, 36(10): 30-33.
陈贺海,张爱珍,余清,等.铁矿石灼烧减量测试新方法—热重分析法[J].岩矿测试,2010,29(4):399-405.CHEN He-hai,ZHANG Ai-zhen,YU Qing,et al.A new method for the determination of loss on ignition in iron ores-thermogravimetry[J].Rock and Mineral Analysis,2010,29(4):399-405.
[4]
郭豪,张建良,祁成林,等.热重法铁矿粉还原性能的研究[J].矿冶工程,2008,28(6):80-83.GUO Hao,ZHANG Jian-liang,QI Cheng-lin,et al.Study on reduction behavior of iron-ore fine by thermogravimetry[J].Mining and Metallurgical Engineering,2008,28(6):80-83.
[5]
郭兴敏,张允茂,张梅,等. TG-DSC法对莱钢进口铁矿粉烧结性能的研究[J].钢铁,2004,39(8):34-37.GUO Xing-min,ZHANG Yun-mao,ZHANG Mei,et al. Study of TG-DSC method on sintering performance of iron ores imported in Laiwu steel[J].Iron and Steel,2004,39(8):34-37.
[6]
周政,李艳军,陈炳炎,等.铁矿石焙烧动力学研究现状及发展[J].金属矿山,2015(8):100-105.ZHOU Zheng,LI Yan-jun,CHEN Bing-yan,et al.Present situation and prospects of research on kinetics study of iron ore roasting[J].Metal Mine,2015(8):100-105.
应海松,张会红.基于MATLAB的电化学滴定曲线导数变换的实现[J].冶金分析,2010,30(10):16-19.YING Hai-song,ZHANG Hui-hong.Realization of derivative transformation for titration curve of electrochemistry with MATLAB[J].Metallurgical Analysis,2010,30(10):16-19.
[9]
龚武,谭秉和,邵光玓.用普通X射线荧光光谱仪进行铁价态的定量分析[J].光谱学与光谱分析,1998,18(6):734-738.GONG Wu,TAN Bing-he,SHAO Guang-di.Determination of the valence of iron by conventional XRF spectrometer[J].Spectroscopy and Spectral Analysis,1998,18(6):734-738.
