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On-line X-ray diffraction for quantitative phase analysis: Application in the Portland cement industry

机译：在线X射线衍射定量相分析：在硅酸盐水泥工业中的应用

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摘要

The aim of this work was to design, construct, install, and commission an on-line, X-ray diffraction (XRD) analyzer capable of continuously monitoring phase abundances for use in process plant control. This has been achieved through a joint project between CSIRO Minerals and Fuel & Combustion Technology Pty. Ltd. with an instrument designed for use in a Portland cement manufacturing plant. Key factors in tailoring such an instrument to the cement industry were (ⅰ) the handling and presentation of a dry sample and (ⅱ) the development of an analytical method suitable for the complex suite of phases contained within Portland cement. The instrument incorporates continuous flow of sample through the diffractometer using a purpose-built sample presentation stage. The XRD data are collected simultaneously using a wide range 120° 2θ) position sensitive detector, thus enabling rapid collection of the full diffraction pattern. The data are then analyzed using a Rietveld analysis method to obtain a quantitative estimate of each of the phases present. The instrument is controlled by a PC linked to the diffractometer through a purpose built interface. The phase abundance information is then transmitted to the central computer in the cement plant where it can be used for the control of mill parameters such as temperature and retention times as well as gypsum feed rate.
机译：这项工作的目的是设计，构造，安装和调试在线X射线衍射（XRD）分析仪，该分析仪能够连续监控过程工厂控制中使用的相丰度。这是通过CSIRO Minerals与Fuel＆Combustion Technology Pty.Ltd。的联合项目实现的，该项目使用的仪器设计用于波特兰水泥制造厂。针对水泥行业量身定制此类仪器的关键因素是（ⅰ）处理和展示干燥样品，以及（ⅱ）开发适用于波特兰水泥内复杂相的分析方法。该仪器使用专门设计的样品展示台，使样品连续不断地流经衍射仪。使用宽范围120°2θ）位置敏感检测器可以同时收集XRD数据，从而可以快速收集完整的衍射图样。然后使用Rietveld分析方法对数据进行分析，以获得每个存在相的定量估算值。该仪器由通过专用接口连接到衍射仪的PC控制。然后将相丰度信息传输到水泥厂的中央计算机，该计算机可以将其用于控制​​轧机参数，例如温度和停留时间以及石膏进料速率。

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