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A lithium ore grade measurement based on the neutron & X-ray bi-modal imaging system
Yangyi Yu1, Yuxuan Lai1, Zhi Zhang1
1Department of Engineering Physics, Tsinghua University, Qinghuayuan No. 1, Beijing, 100084, PR China; Key Laboratory of Particle & Radiation Imaging (Tsinghua University), Ministry of Education, Qinghuayuan No. 1, Beijing, 100084, PR China.
Abstract:
The grades of the minerals significantly affects the energy consumption and chemical pollution along with the beneficiation process for extracting lithium element from the ores. Based on the large neutrons' macro cross section of the Li2O cluster inside the ores, the grades of lithium ores could be analyzed by the thermal neutron penetrating information. In this work, a bimodal imaging method, which utilizes both the information of penetrating neutrons and X-rays delivered by the same electron linear accelerator driven photoneutron system, was proposed to investigate the lithium concentration of each ore. A linearity R-square value of 0.991 between the results obtained with this method and those from the chemical method has been achieved. The average error in lithium concentration estimation is approximately 0.2 wt percent (wt%). The underlying principles and the experimental results will be elaborated on in this study.
