Applying the Novel Cross-Belt Neutron Activation Analysis for Real-Time Analysis of Elements and Mineralogy in Copper Ore
摘要
In the copperCopper miningMining industry, it has become critical in the past decade to applyReal-time analysis real-time analysisAnalysis of the elemental analytical and mineralogyMineralogy of the copper oreCopper ore, which can provide fast and reliable ore information to improve process controlProcess control, for better mineMine planning and process assessment. Generally, there are some technical challenges, such as frequent calibration and maintenance, significant operational costs, and unsatisfying analysisAnalysis accuracy, in the application of a real-time analyzer in practice. Recently, a novel cross-belt Neutron ActivationNeutron Activation Analyzer (NAA), i.e., Prompt Gamma NAA or Pulsed Fast Thermal NAA, has been applied to directly measure the elementsElements and the mineralogyMineralogy of copper oreCopper ore. NAA uses Americium-Beryllium Industrial Neutron Sources, which not only saves the isotope replacementReplacement, but provides high energy to use neutron inelastic scatter and thermal neutron capture reactions for the direct measurement of the elementsElements of carbonCarbon (C), oxygen (O), and fluorine (F), which are difficult to be accurately measured by using other available real-time analyzers. In the present study, a cross-belt NAA was applied to analyze the elementsElements and mineralogyMineralogy of various copper oreCopper ore samples. The analyzer was calibrated by implementing the site reference standard and the mineralogical reference standard. The results are compared to those obtained with inductively coupled plasma mass spectrometry and atomic absorption spectroscopy. The measured mineralogyMineralogy results are compared to those obtained with X-ray fluorescence and QEMSCAN. Findings show that NAA has the advantages of (1) reducingReducing operationOperation costs, (2) analyzing the elementsElements of C, O, and F, and (3) analyzing the mineralogyMineralogy with high accuracy and reliabilityReliability, all of which make a cross-belt NAA very promising to be widely applied in copperCopper miningMining industry.