High Voltage Pulsed Power Fragmentation System

高压脉冲功率破碎系统

• 批准号: 502345461
• 金额: --
• 依托单位: Eberhard Karls Universität Tübingen
• 依托单位国家: 德国
• 项目类别: Major Research Instrumentation
• 财政年份: 2022
• 资助国家: 德国
• 起止时间: 2021-12-31 至 无数据
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/502345461?language=en
• 关键词: Voltage; Pulsed; Power; Fragmentation; System

A fundamental step in many geochemical and geological analyses is fragmentation, or disaggregation, of rocks into their constitutive components for analysis of individual minerals, grain size variations, or other constituents (e.g. fossils). Unfortunately, conventional techniques such as jaw crushing are time consuming and often lead to low sample recovery. However, new technological advances such as pulsed power fragmentation provide a superior way to circumvent this problem. In this proposal, a new departmentally accessible core piece of equipment is requested for the recently constructed ‘Geo- und Umweltforschungszentrum’ (GUZ, ~21,000 m2) at the University of Tübingen. This equipment will replace traditional fragmentation instruments (jaw crushers) and provide higher sample throughput and yield, increase sample quality, and eliminates carcinogenic silicate dust production. High voltage pulsed power fragmentation (or electrical fragmentation) works for a large variety of composite materials including typical rock types (e.g. granite, gneiss, sandstone). The fragmentation and liberation of components is obtained by high voltage discharges generated between two electrodes. The material to be disaggregated is brought in-between the electrodes in a water-filled vessel. The discharge travels between the electrodes along grain boundaries and liberates individual grains without breaking them. From this process, the original grain-size of the composite material is preserved and because the process is conducted within water, silicate dust liberation does not occur.Rock fragmentation and mineral/fossil liberation is the basis for a variety of scientific methods in the geosciences and is also useful in other fields since any cohesive composite material can be disintegrated with electrical fragmentation. Within the GUZ and the Geoscience department a large number of researchers within geology, geochemistry, sedimentology, mineralogy, petrology and paleontology will benefit from this equipment. The main user of the electrical fragmentation system is the Earth System Dynamics Research Group (ESD-RG) at the University of Tübingen, consisting of ~40 people. The group investigates hypotheses centered around how plate tectonic, Earth surface, atmospheric, and biologic processes interact to determine the form and evolution of Earth's topography over geologic timescales. We do this using a variety of geochemical, high-performance computing, and remote sensing techniques. A key aspect of our research is in the innovative application of geo- and thermochronological techniques (e.g., U-Pb, (U-Th)/He and fission track dating, cosmogenic isotopes) to date geologic events and constrain the rate at which different tectonic and surface processes occur. These analytical techniques, when combined with state-of-the-science modeling techniques, allow the determination of spatial and temporal variations in erosion, deformation, and paleo topography.

许多地球化学和地质分析的基本步骤是岩石中的碎片或分割，用于分析各个矿物质，晶粒尺寸变化或其他一致性（例如化石）的组成部分。不幸的是，诸如下颌碎屑之类的传统技术很耗时，通常会导致样本回收率较低。但是，诸如脉冲功率碎裂之类的新技术进步为解决这个问题提供了一种更好的方法。在此提案中，要求最近建造的“ Geo-und umweltforschungszentrum”（Guz，约21,000平方米）的新部门可访问的核心设备。该设备将取代传统的破碎仪器（颌骨破碎机），并提供更高的样品吞吐量和产量，提高样品质量并消除致癌硅粉尘的产生。高压脉冲功率碎片（或电碎片化）适用于各种复合材料，包括典型的岩石类型（例如花岗岩，片麻岩，砂岩）。组件的碎裂和解放是通过两个电极之间产生的高压排放获得的。要分开的材料在充满水的容器中的电极之间带来。放电沿晶界之间的电极在电极之间行驶，并在不破坏它们的情况下释放单个晶粒。从此过程中，保留了复合材料的原始晶粒大小，并且由于该过程是在水中进行的，因此不会发生硅胶粉尘释放。岩石碎片和矿物/化石释放是地球科学中各种科学方法的基础，并且在其他领域也很有用，因为任何粘性复合材料都会因电碎片而分散。在GUZ和地球科学部门内，地质，地球化学，沉积学，Mineraology，Petrology和古生物学中的大量研究人员将从该设备中受益。电碎片系统的主要用户是Tübingen大学的地球系统动力学研究小组（ESD-RG），其中约40人。该小组研究了围绕板构造，地面，大气和生物过程如何相互作用的假设，以确定地质时间刻度上地球地形的形式和进化。我们使用各种地球化学，高性能计算和遥感技术来做到这一点。我们研究的一个关键方面是在地质和裂变轨道约会（u-th）/He和裂变轨道约会，宇宙同位素上的创新应用（例如，u-pb，（u-th）/He和fission轨道轨道同位素）迄今为止，并限制了发生不同的构造和表面过程的速度。这些分析技术与最先进的建模技术结合使用，可以确定侵蚀，变形和古地形的空间和临时变化。