PROCEDIMIENTO PARA PRECONCENTRAR MINERALES NIQUELIFEROS OXIDADOS DE ORIGEN LATERITICO.

摘要

A process for upgrading the nickel content of a nickeliferous ore of lateritic origin comprises subjecting the ore to controlled attrition to liberate the friable portions in the ore particles without breaking the harder portions, such that the d90:d10 ratio of the ore (where d90 is the smallest size of mesh passing 90% by weight of the ore and d10 is the smallest size of mesh passing 15% by weight of the ore) subjected to attrition is at least twice the d90:d10 ratio of the original ore, and classifying the ore particles according to their size, those having a size below a certain value being recovered as the upgraded ore of higher nickel content.