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style="background-image:url(https://www.thermofisher.com/blog/mining/wp-content/uploads/sites/3/2024/05/iStock-1332728758.jpg)"> </section> <div class="site-inner"><div class="content-sidebar-wrap"><main class="content"><article class="post-13079 post type-post status-publish format-standard has-post-thumbnail category-general tag-mining-2 tag-mining-gangue tag-mining-operations tag-mining-stockpile-feed tag-pgnaa entry" aria-label="Advantages of PGNAA Analysis on Stockpile Feed"><header class="entry-header"><h1 class="entry-title">Advantages of PGNAA Analysis on Stockpile Feed</h1> <span class="post-info-author"> By <a href="https://www.thermofisher.com/blog/author/kevin-gordonthermofisher-com/" title="Posts by Kevin Gordon" rel="author">Kevin Gordon</a> </span> <span class="post-info-date"> 06.04.2024 </span> </header><div class="entry-content"><p>In <a href="https://www.thermofisher.com/us/en/home/industrial/cement-coal-minerals/mining-minerals.html?icid=CAD_blog_mining_2024June">mining operations</a>, stockpile feed refers to the material that is extracted from a mine and stockpiled for further processing or treatment. It typically consists of ore or mineralized material that has been mined and temporarily stored in designated areas on the mine site. Stockpile feed serves as a reserve of material for continuous operations, allowing for a consistent supply of feed material to the processing plant or mill. This helps ensure a steady flow of material to the processing facilities, even when mining operations may experience fluctuations in production or disruptions due to various factors such as weather conditions or equipment maintenance.</p> <p>Stockpile feed management involves proper planning and organization to ensure efficient handling and utilization of the stored material. Factors such as grade variation, mineralogy, and moisture content need to be considered when determining the order and timing of processing the stockpile feed.</p> <p>By maintaining a stockpile of feed material, mining operations can optimize their processing operations, reduce downtime, and ensure a consistent supply of material for further processing, thereby maximizing productivity and overall operational efficiency.</p> <h2>Maintaining Consistent Feed Supply</h2> <p>Stockpile feed in mining operations can exhibit significant variability in terms of quality and grade. This variability poses challenges in maintaining consistent feed supply to the mill. However, with the implementation of Prompt Gamma Neutron Activation Analysis (PGNAA) online analysis, valuable data about the feed can be obtained before it reaches the processing plant. <a href="https://www.thermofisher.com/us/en/home/industrial/cement-coal-minerals/cement-coal-minerals-learning-center/cement-analysis-production-information/pgnaa-pftna-technology.html?icid=CAD_blog_mining_2024June">PGNAA analysis</a> offers a higher level of resolution compared to traditional truck or shovel sensors. By using gamma rays to detect and measure the elemental composition of the material, PGNAA provides more accurate and detailed information about the feed’s quality and grade. Because of the highly penetrating nature of neutrons, PGNAA measures the entire volume of a sample or process stream, rather than just the surface. This deeper analysis and finer resolution enables better decision-making regarding grade control and feed routing, leading to optimized operations.</p> <p>One of the key advantages of PGNAA analysis is its ability to provide feedback to the mine, promptly. “Prompt” is even in the name! Providing results on a minute-by-minute basis as it does enables quick responses to any mis-routings or grade control sampling errors and allows corrective actions to be implemented rapidly. State-of-the-art instruments use specialized, <a href="https://www.thermofisher.com/order/catalog/product/PREBOS?icid=CAD_blog_mining_2024June">advanced software</a> to measure and present relevant metrics, allowing users to access their data even more quickly and apply that information to their process. By identifying and addressing issues early on, mining operations can optimize their processes, minimize inefficiencies, and reduce the risk of producing substandard product.</p> <p>PGNAA analysis also contributes to improved production economics by providing valuable data on potentially mishandled waste and ore. This analysis helps identify undesirable grade material that may inadvertently find their way into the stockpile. By recovering or diverting such materials away from the processing plant, production costs can be minimized, and the overall efficiency of the operation can be enhanced.</p> <h2>Tracking Gangue Minerals</h2> <p>In addition to assessing the ore grade, <a href="https://www.thermofisher.com/us/en/home/industrial/cement-coal-minerals/cement-coal-minerals-learning-center/cement-analysis-production-information/pgnaa-pftna-technology.html?icid=CAD_blog_mining_2024June">PGNAA analysis</a> also enables the tracking of gangue minerals through light element analysis. Gangue materials refer to the unwanted or economically insignificant minerals or rocks that are found alongside the valuable ore or mineral deposit being extracted. These materials have little or no commercial value and are typically separated and discarded during the ore processing or beneficiation process. Gangue materials often differ in composition from the desired ore and can vary depending on the specific mineral deposit being mined. They may include various minerals, rocks, or even non-mineral materials such as clay, shale, or organic matter. The specific gangue minerals present can vary widely, but common examples include quartz, calcite, feldspar, mica, and pyrite.</p> <p>This tracking capability with <a href="https://www.thermofisher.com/order/catalog/product/CBOMNIAGILE?icid=CAD_blog_mining_2024June">PGNAA analyzers</a> allows for a deeper understanding of the mineral composition of the feed material. By identifying and quantifying gangue minerals, mining operations can optimize their processing techniques, leading to improved recovery rates and reduced waste. By providing insights into the variability of ore grades from the mine to the mill, PGNAA analysis enables mining operations to take proactive measures to reduce variability. This reduction in variability ensures a more stable and consistent feed supply to the processing plant. For end-of-month mine/mill reconciliation purposes, having PGNAA analysis on the mill feed provides a much more “provable” point of issue as compared to attempts at reconciling mine to flotation feed. (In the latter situation, the issue is often difficult to identify and often the flotation feed sampler or weightometers are “blamed,” requiring expenditures of time and resource to either prove or disprove the accusation.) By optimizing the performance of the concentrator and minimizing fluctuations in feed quality, PGNAA analysis of stockpile feed can significantly reduce production costs and improve the overall business model of the mine.</p> <h2>Summary</h2> <p>To summarize, PGNAA analysis offers several distinct advantages over other types of analyses when it is applied to stockpile feed in mining operations. Its ability to provide finer resolution, rapid feedback, and insights into the variability of ore grades allows for optimized operations, which leads to improved production economics and enhanced plant performance. By leveraging the benefits of PGNAA analysis, mining companies can achieve greater efficiency, cost-effectiveness, and long-term success in their operations.</p> <h2>Additional Resources</h2> <ul> <li>Application note,<a href="https://assets.thermofisher.com/TFS-Assets/CAD/Application-Notes/cb-omni-bulk-ore-sorting-app-note.pdf?icid=CAD_blog_mining_2024June"> Bulk Ore Sorting in Base and Precious Metal</a>s</li> <li>Application note, <a href="https://assets.thermofisher.com/TFS-Assets/CAD/Application-Notes/AN-Ore-Sorting-Clean-Energy.pdf?icid=CAD_blog_mining_2024June">Ore sorting: Helping make clean energy greener</a></li> <li><a href="https://assets.thermofisher.com/TFS-Assets%2FCAD%2FSchematics-%26-Diagrams%2Fperiodic-table-pgnaa-detection-limit-guidelines.pdf?icid=CAD_blog_mining_2024June">PGNAA Detection Limit Guidelines</a></li> <li>eBook, <a href="https://www.thermofisher.com/us/en/home/global/forms/industrial/pgnaa-pftna-technology-ebook-registration-form.html?icid=CAD_blog_mining_2024June">Guide to PGNAA and PFTNA technology for non-scientists</a></li> </ul> <aside class="mashsb-container mashsb-main "><div class="mashsb_above_buttons">Share this article </div><div class="mashsb-box"><div class="mashsb-count mash-large" style="float:left"><div class="counts mashsbcount">43</div><span class="mashsb-sharetext">SHARES</span></div><div class="mashsb-buttons"><a class="mashicon-facebook mash-large mashsb-noshadow" href="https://www.facebook.com/sharer.php?u=https%3A%2F%2Fwww.thermofisher.com%2Fblog%2Fmining%2Fadvantages-of-pgnaa-analysis-on-stockpile-feed%2F" target="_top" rel="nofollow"><span class="icon"></span><span class="text">Facebook</span></a><a class="mashicon-linkedin mash-large mashsb-noshadow" 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