Use of discrete element modelling to evaluate the parameters of the sampling theory in the feed grade sampler of a sulphide gold plant - Magalhães, Marcus Félix; Chieregati, Ana Carolina; Ilic, Dusan; Carvalho, Rodrigo Magalhães de; Lemos, Mariana Gazire; Delboni Júnior, Homero (Minerals, 2021)