Effects of Surface Structure Changes on Reactivity of Scheelite after Mechanical Activation
E. V. BOGATYREVA, A. G. ERMILOV
National Research University of Science and Technology-MISIS, Leninskii pr. 4, Moscow, 119049 Russia
Keywords: вольфрам, шеелитовый концентрат, предварительная механоактивация, содовое выщелачивание, рентгеноструктурный анализ, энергосбережени, wolfram, scheelite concentrate, preliminary mechanical activation, sodium leaching, X-ray structure analysis, energy saving
Abstract
The article illustrates feasibility of prediction of change in energy content and reactivity of scheelite concentrate after mechanical activation based on the data of X-ray structure analysis under onward low-temperature (under 100°С) sodium leaching. The complex nature of change in the energy content and reactivity of mechanically activated scheelite under influence of structural changes in mineral particles is determined. It is confirmed that energy accumulated in the form of surface energy and micro-deformations during mechanical activation affects performance of further leaching. The procedure and criteria developed to estimate efficiency of mechanical activation of scheelite make a technical background for energy-saving technology of scheelite concentrate treatment directly at mining and processing plants.
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