National University of Science and Technology «MISiS» (Russia):

Smaylova A. B., Engineer
Smaylov B. B., Engineer
Dumov A. M., Ph. D. in Engineering Sciences, Associate Professor, adminopr@misis.ru
Muraitov D., Engineer

The current trend in prediction of beneficiation processes consists in application of quantitative mineralogical analysis data. In this context, products are represented as a composition of types of particles – liberated phases and intergrowths, differing in size, mineral composition, character of mineral intergrowth, etc. The task of grinding operation prediction consists in determination of types of particles and masses of types of particles in ground product, on the basis of types of particles and their masses in feed of respective operation, taking into consideration grinding conditions. This work presents the results of lead-zinc ore main minerals liberation kinetics study, the ore in question being distinguished by complex mutual dissemination of galena, sphalerite and pyrite. It was established, that size fraction distribution with respect to types of intergrowths for the ore in question depends only on fraction size, but does not depend on its yield, and is constant during grinding. Yields of types of particles are calculated on the basis of size fractions yields (calculated by a tried-out model), as well as yields of types of intergrowths from each size fraction and their mineral content (determined through quantitative mineralogical analysis of size fractions in laboratory grinding products). The calculation results, based on tried-out models, will include detailed data on ground material. These data may be used in processing circuits modeling on the basis of feed description as multi-phase and multi-component material, including detailed characteristics of mineral particles intergrowths morphology.

The work was performed with the financial support from the Federal Targeted Programme of the Ministry of Education and Science of the Russian Federation for the Project No. RFMEFI57514X0085.

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