Pricing of Tungsten Concentrate

Prices for tungsten concentrates produced by mines and the intermediate tungsten powers made by the secondary processors are quoted in metric tonne units (mtu). An mtu is made up of 10kg of WO3, as contained within the particular material in question, concentrates or APT (this relationship conveniently lead to the fact that a 1% resource grade is equal to 1 mtu). The two materials for which prices are quoted widely and reported in mtu of WO3 are listed as following:

1.tungsten trioxide, WO3, (containing 79.3% tungsten metal), as the critical constituent in the minerals in mine concentrates

2.ammonium paratungstate, APT, the main secondary downstream product made from concentrates.

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