| 摘要 |
A process for upgrading waste powders of the mining industry containing iron oxides is described, which comprises the steps of preparing a mixture comprising powder based on iron oxides, an aqueous dispersion of a thermosetting resin and optionally also carbon powder, and a catalyst of acidic nature; kneading the mixture at a temperature comprised between 5 and 100 °C to form a homogeneous paste, and granulating such homogeneous paste at a temperature comprised between 100 and 300 °C, thus obtaining granules comprising powder based on iron oxides and optionally carbon powder bound by said resin that has been polymerized. |
