In an Aluminium production facility the process is complex wherein the flow of activities include extraction of metallic aluminium from minerals followed by reprocessing through different facilities, where we for see several type of furnaces in the production of aluminium semi-finished products. It is in these Re-melting stages that our advanced refractory products are utilized while the primary aluminium production relies on refractory bricks. MPR Refractories offer solutions for the entire aluminium industry. Products for primary aluminium are mainly shaped products such as Fireclay bricks, Insulating bricks and Alumina bricks, which can be supplied by us. Aluminium having strong affinity for oxygen, results to different mechanisms of oxidation of molten aluminium alloys. The bath surface passivation stops the process at the interface with the furnace atmosphere, but the reaction can proceed at the surface of refractory or in its burden layers. This results in the development of corundum, which can be prevented by the correct use of our refractories. There are two main areas where corundum may be formed: First at the bath surface because of direct oxidation: 4Al (melt) + 3 O2 ->2 Al2O3 In the refractory starting from the liquid contact surface (under the bath level), because of the higher affinity to oxygen of metallic aluminium diffused from the bath into refractory according to the reaction:

4 Al (diff) + 3 SiO2 ->2 Al2O3 + 3 S