Calcium Tungstate Manufacturing Process
The following methods is for calcium tungstate manufacturing process:
1.Mix sodium tungstate and sodium sulfide and dissolve into water, then add zinc chloride aqueous solution. After filtration, treat filtrate with calcium chloride, and then we can get calcium tungstate.
2.Calcium oxide/calcium hydroxide reacts with tungsten oxide/tungsten tetrahydroxide in alkali hydroxide/carbonate solution, and then calcium tungstate is obtained.
3.Burning tungsten trioxide and calcium carbonate in 1070℃ or treatment between sodium tungstate solution and calcium chloride solution or processing scheelite.
Related Products:
Calcium tungstate is a self activated phosphor. It is an effective luminescent material under the excitation of X ray, electron beam and ultraviolet.
Tungsten trioxide exists in the form of hydrate in nature, including mineral forms: wolfram (WO3? H2O), water tungsten oxide (WO3.2H2O) and water tungsten oxide.
Tungsten carbide powder (WC) is the main raw material for producing cemented carbide, chemical formula WC. Tungsten carbide powder is a black six square crystal with metallic luster and hardness similar to diamond. It is a good conductor of electricity and heat.
Tungsten is a parent stone element, mainly in the form of wolframite in pegmatite and hydrothermal deposits; there are about 15 known tungsten ores, of which there are mainly two wolframite and scheelite.