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Copper alloys are metal alloys that have copper as their principal component. They have high resistance against corrosion . Of the large number of different types, the best known traditional types are bronze , where tin is a significant addition, and brass , using zinc instead.
Hiduminium or R.R. alloys (2% copper, iron, nickel): used in aircraft pistons; Hydronalium (up to 12% magnesium, 1% manganese): used in shipbuilding, resists seawater corrosion; Italma (3.5% magnesium, 0.3% manganese): formerly used to make coinage of the Italian lira; Magnalium (5-50% magnesium): used in airplane bodies, ladders, pyrotechnics ...
Subsequent roasting converts the ores to cobalt sulfate, and the copper and the iron are oxidized to the oxide. Leaching with water extracts the sulfate together with the arsenates. The residues are further leached with sulfuric acid, yielding a solution of copper sulfate. Cobalt can also be leached from the slag of copper smelting. [95]
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It is the most abundant oxidised cobalt mineral in the Katanga Copperbelt, a region in the Democratic Republic of the Congo. [3] About 70% of known heterogenite is located in the DRC. [4] The name heterogenite came from Greek, "of another kind", as the mineral differs in composition from similar minerals. [5]
Following is a list of minerals that serve as copper ores in the copper mining process: [1] Image Name Formula % Copper when pure Chalcopyrite: CuFeS 2: 34.5 Chalcocite:
Its name stems from the contained element cobalt, whose name is attributed to the German term Kobold, referring to an "underground spirit" or "goblin". The notion of "bewitched" minerals stems from cobaltite and other cobalt ores withstanding the smelting methods of the medieval period, often producing foul-smelling, poisonous fumes in the process.
The Browns polymetallic ore deposit is a large ore deposit located at Mount Fitch, near Batchelor, 64 kilometres south of Darwin, Northern Territory, Australia.. The Browns deposit consists of a sizeable, +80 million tonne deposit of nickel-copper-cobalt, with some poorly defined zones of uranium, and extensive zones of lead-zinc mineralization having been discovered in recent years.