Tungsten oxide is yellow powder with stable
chemical property and anti acid ability. But it can be dissolved in alkali
solution such as NaOH, KOH, Ca(OH)2 which will become tungstate.
Calcium hydroxide chemical formula is
Ca(OH)2, it is white powder. Also called as slaked lime, hydrated lime.
Tungsten trioxide and calcium hydroxide reaction is as following：
WO3+Ca(OH)2=CaWO4+H2O
Ca2WO4 is calcium tungstate which is also
called artificial scheelite. It is important chemical raw material and mainly
be used to produce APT, WO3, ferro tungsten, steel alloy, tungsten carbide,
tungsten products, tungsten wire, tungsten alloy and other tungsten products.
Besides that, other emerging industry such as fluorescent paint, screen pipe
for shoot, X-ray and day light.
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