... 4.Thicken the surface It is not only widely applied on separating Gold, Tungsten, Tin, Manganese, Iron, Titanium, Zircon, ... Tantalum, Barium, Chrome, Lead, Zinc, Mercury, Copper, Aluminum ,and other rare metals and the noble metal ... this cover its strength reaches as high as 70% of steel, the features of this design are stronger, wear-resistant, Corrosion-resistant ...