40 Metal, ore and mineral refining and purifying services, namely, aluminum, iron, zinc, copper, gold, silver, molybdenum, cobalt, magnesium, lithium, manganese, nickel, palladium, platinum, thorium, phosphorus, uranium, titanium, silica, rare earth elements, gallium, salts and various chemicals and derivatives thereof, namely, oxides, hydroxides, chlorides, sulfates, sulfides, alloys refining and purifying; material processing, namely, obtaining metals from native earth materials, ores, minerals, and waste materials