CHARACTERIZATION OF LOW-GRADE MAGNESIUM OXIDE BY-PRODUCTS FOR ENVIRONMENTAL SOLUTIONS

摘要

During the calcination of natural magnesite, several by-products are generated. The main differences between these by-products are chiefly a function of the process in which these are involved, conditioning the chemical and physical characteristics as well as the potential reutilization where these can stand out. After extraction from ore, the natural mineral is taken to classifiers and collectors for sieving, and the selected minerals are fed to the kiln for calcination. The combustion gases generated at the outlet of the kiln are taken to fabric filters where a great quantity of solid particles is retained. These are encompassed as cyclone dust (CD) and it is widely known as Low-Grade MgO (LG-MgO). Its great heterogeneity complicates the post-treatment and without any reclaiming it is stored at the open.