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γ射线检测在跳汰选煤中的应用研究
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摘要
本文提出了基于γ射线密度检测原理的跳汰机床层密度动态检测方法。
     在对跳汰机分层理论、γ射线检测物料密度机理和γ射线计数原理研究的基础上,确定了床层密度检测系统的设计方案;在实验室里,通过一系列的相关实验,确定了检测系统中甄别器的阈值电压及相关参数;在实验室内对γ射线检测系统进行测试,结果表明,用γ射线检测法,能够真实地检测到跳汰机床层的密度值,可以较准确地反映跳汰机的床层状态。
     在邢台东庞矿洗煤厂运行γ射线检测系统,对现场采集的数据进行分析,得到如下结论,γ射线用于跳汰机床层密度检测,有良好的精度,在跳汰机床层不同层面所测的的密度值,包含了丰富的信息,这些信息可以为跳汰机的给煤、风、水、排料的优化控制提供依据。
In this thesis, a dynamic way to density detecting of the jigging coal bed based on the theory of γ-ray in density detecting is proposed.
    Based on the research into the theory of jigging delamination,the mechanism of the y-ray in material density detecting and the theory of γ-ray in counting numbers, the design project of the detecting system of the coal bed density is confirmed; in the laboratory, a series of relative experiments are made to obtain the gating voltage and relative parameters of the discriminating ware in the detecting system. The laboratorial test of the y-ray detecting system shows: γ-ray detection can get the true density of the jigging bed layer and reflect the state of the jigging bed layer correctly, both in a considerable level.
    As the y-ray detecting system running in DongPang Coal Mine in XingTai, real-time data is collected and analyzed, a conclusion is reached: the way of γ-ray in detecting the density
    of jigging bed layer has considerable precision. The density values detected in different bed layer schlep abundance information, which can provide evidence to the optimizing
    
    
    control of the coal-delivering, wind, water and eduction.
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