Classification of coal gangue and identification of coal type based on first-derivative of mid-infrared spectrum

IF 3.1 3区 物理与天体物理 Q2 INSTRUMENTS & INSTRUMENTATION Infrared Physics & Technology Pub Date : 2024-08-31 DOI:10.1016/j.infrared.2024.105537
Zekun Li , Leiying Xie , Ruonan Ji , Yuanping Chen , Shaowei Wang
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Abstract

Efficiently sorting coal gangue and identifying coal types are vital operations in coal preparation, yet they are traditionally resource-consuming, labor-intensive, and potentially hazardous. This work puts forward an straightforward method employing mid-infrared spectroscopy with first derivative spectrum to address these issues. The proposed technique focuses on the delineation and enhancement of characteristic spectra to detect subtle differences among samples. The method utilizes just a few characteristic spectra of 3740–3700 cm−1, 1790–1750 cm−1, 1615–1583 cm−1, 1580–1540 cm−1, 1550–1440 cm−1, 1270–1210 cm−1 and 867–854 cm−1 to achieve 100 % high-accuracy classification of coal gangue and identification of coal types with total 250 spectra, such as bituminite, anthracite, lignite, roof sandstone and gangue, without the need for secondary sample processing or the assistance of machine learning algorithms, simplifying the process considerably. Such a strategy not only significantly improves the efficiency of coal sorting but also endorses real-time on-site detection. It offers a theoretical foundation for advanced coal separation technology and its implementation in real-world mining operations.

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基于中红外光谱一次衍射的煤矸石分类和煤炭类型鉴定
有效分拣煤矸石和识别煤炭类型是煤炭制备过程中的重要操作,但这些操作历来耗费资源、劳动密集型和潜在危险性。本研究提出了一种采用中红外光谱一阶导数光谱的直接方法来解决这些问题。所提出的技术侧重于特征光谱的划分和增强,以检测样品之间的细微差别。该方法仅利用 3740-3700 cm-1、1790-1750 cm-1、1615-1583 cm-1、1580-1540 cm-1、1550-1440 cm-1、1270-1210 cm-1 和 867-854 cm-1 这几个特征光谱,就实现了 100%的高精度煤矸石分类,并利用总计 250 个光谱识别煤炭类型,如沥青、无烟煤、褐煤、顶板砂岩和煤矸石,而无需二次样品处理或机器学习算法的辅助,大大简化了流程。这种策略不仅大大提高了煤炭分选的效率,还支持实时现场检测。它为先进的煤炭分选技术及其在实际采矿作业中的应用奠定了理论基础。
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来源期刊
CiteScore
5.70
自引率
12.10%
发文量
400
审稿时长
67 days
期刊介绍: The Journal covers the entire field of infrared physics and technology: theory, experiment, application, devices and instrumentation. Infrared'' is defined as covering the near, mid and far infrared (terahertz) regions from 0.75um (750nm) to 1mm (300GHz.) Submissions in the 300GHz to 100GHz region may be accepted at the editors discretion if their content is relevant to shorter wavelengths. Submissions must be primarily concerned with and directly relevant to this spectral region. Its core topics can be summarized as the generation, propagation and detection, of infrared radiation; the associated optics, materials and devices; and its use in all fields of science, industry, engineering and medicine. Infrared techniques occur in many different fields, notably spectroscopy and interferometry; material characterization and processing; atmospheric physics, astronomy and space research. Scientific aspects include lasers, quantum optics, quantum electronics, image processing and semiconductor physics. Some important applications are medical diagnostics and treatment, industrial inspection and environmental monitoring.
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