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Developing Applications of Mineral-Specific X-ray Diffraction

开发矿物特异性 X 射线衍射的应用

基本信息

批准号：
ST/N000218/1
负责人：
Graeme Hansford
金额：
$ 10.93万
依托单位：
University of Leicester
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2015
资助国家：
英国
起止时间：
2015 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=ST%2FN000218%2F1
关键词：
Developing Applications Mineral Specific ray

项目摘要

Dr Graeme Hansford has invented a novel X-ray diffraction (XRD) technique which enables the enhancement of the diffraction signal from a specific mineral within a mixture. This technique has multiple potential commercial applications, primarily in metallurgy and mining. It can be implemented using relatively low-cost X-ray technology as a handheld or portable device or in a production line configuration. The technique is suited to applications in which the user is interested in one key mineral or phase, such as an important impurity. The method can be used to determine the presence or absence of this phase, and for quantification.The primary targeted application at this stage is the quantification of retained austenite in steel production. The heat treatment of steels is mainly aimed at producing martensite which is an iron phase supersaturated with carbon. Martensite has generally desirable properties for steel applications, for example it is has a high tensile strength. Any austenite which does not convert to martensite (hence 'retained') may have benefits to the intended application or, more commonly, it may be deleterious. Measurement of the amount of retained austenite is therefore crucial for process and quality control purposes in the manufacture of steel. XRD methods are standard for retained austenite quantification, but current instruments cost in excess of £100k and either require destructive preparation of the sample or have a cumbersome measurement head which must be carefully positioned relative to the analysis area. In contrast, an instrument based on the phase-specific XRD technique can have a point-and-shoot format similar to handheld X-ray fluorescence instruments and is likely to cost ~£30k. This novel technique has the potential to disrupt the existing market in retained austenite measurement.Another application example is the detection and quantification of quartz in iron ores. Quartz is commonly present as an impurity in iron ores and determines the optimum processing method because it is a hard mineral. A quick and accurate estimate of the quartz content in ores would allow rapid decision making at mines and mineral processing plants, saving costs through streamlining of operations and avoiding costly and wasteful errors. The mineral-specific XRD technique offers a compact and low-cost method of making such measurements.

Graeme Hansford 博士发明了一种新型 X 射线衍射 (XRD) 技术，该技术能够增强混合物中特定矿物的衍射信号。该技术具有多种潜在的商业应用，主要是在冶金和采矿领域。它可以使用相对低成本的 X 射线技术作为手持式或便携式设备或在生产线配置中实现。该技术适合用户对一种关键矿物或相（例如重要杂质）感兴趣的应用。该方法可用于确定该相是否存在并进行定量。此阶段的主要目标应用是钢铁生产中残余奥氏体的定量。钢的热处理主要是为了产生马氏体，马氏体是碳过饱和的铁相。马氏体通常具有钢应用所需的性能，例如具有高拉伸强度。任何不转变为马氏体（因此“保留”）的奥氏体可能对预期应用有益，或更常见的是，它可能是有害的。因此，残余奥氏体含量的测量对于钢制造过程和质量控制至关重要。 XRD 方法是残留奥氏体定量的标准方法，但目前的仪器成本超过 10 万英镑，并且要么需要对样品进行破坏性制备，要么具有笨重的测量头，必须相对于分析区域小心定位。相比之下，基于相特定 XRD 技术的仪器可以具有类似于手持式 X 射线荧光仪器的傻瓜式格式，并且可能花费约 3 万英镑。这项新技术有可能颠覆现有的残余奥氏体测量市场。另一个应用示例是铁矿石中石英的检测和定量。石英通常作为铁矿石中的杂质存在，并且由于它是一种坚硬的矿物，因此决定了最佳的加工方法。快速准确地估计矿石中的石英含量将使矿山和选矿厂能够快速做出决策，通过简化操作来节省成本，并避免代价高昂且浪费的错误。特定矿物 XRD 技术提供了一种紧凑且低成本的测量方法。