The Reserves of Molybdenum
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- Category: Molybdenum knowledge
- Published on 30 August 2013
- Written by 陈桂兰
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Molybdenum does not occur free in nature, but in the form of it's ores, the most important of which are molybdenite and wulfenite. It ranks 56th in order of abundance of the elements in the crust of the earth and is an important trace element in soils, where it contributes to the growth of plants.
Although molybdenum is primarily used in steels, its complex and unique properties have proved invaluable in a constantly expanding range of other alloy systems and chemicals.
One of the unique features of Molybdenum, as distinct from other heavy metals, is that laboratory tests have shown its compounds to be of low toxicity.
Molybdenum is only known to occur in a natural state chemically combined with other elements. Although a number of molybdenum-bearing minerals have been identified, the only one of commercial significance is molybdenite (MoS2) - a natural molybdenum sulphide. In ore bodies, molybdenite is generally present in quantities from 0.01- 0.50% and is often associated with thesulphide minerals of other metals, notably copper.
Reserves are mainly located in the western mountain regions of North and South America.
The USA is by far the largest producing country, and also has the largest reserve base of 5.4 millio tonnes, nearly half of the world's total.
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