Aluminum naturally forms an oxide layer on ... Chemically, this is the sodium salt of sulphuric acid, and you can dispose of it safely after neutralizing it with baking soda.

and aluminium products. The Copper segment is the manufacture and sale of copper cathode, continuous cast copper rods, sulphuric acid, DAP and complexes, gold, silver, and other precious metals.

Aluminum, Iron Ore, Power, and Oil and Gas. The Copper segment focuses in custom smelting and also include a copper smelter, a refinery, a phosphoric acid plant, a sulphuric acid plant ...