Petrov S. V., Senior Research Officer, Candidate of Engineering Sciences, e-mail: svpetrov@mail.ru; Petrov V. F., Head of Department, Candidate of Engineering Sciences, ph.: +7 (3952) 33-07-71, Joint Stock Company “Irkutsk Research Institute of Precious and Rare Metals and Diamonds” (Irgiredmet).

On the base of two dual-industrial devices of gold heap leaching, the migration of mineral particles with different grain size in pile body has been researched. It has been established, that reduction of filtration coefficient, induced by sedimentological occurrences depends on mineral raw material content and technology of ore preparation. The expediency of implementation of pelletizing operations for ores, contained minerals, disposed to slime formation has been experimentally confirmed.