Tungstate consists of wolframate radical or poly tungsten acid radical. Ammonium ions, alkali metals, alkaline earth metals and many heavy metal cations can form tungstates. Apart from alkali metal, ammonium and magnesium salts, most tungstate is insoluble in water.

After artificial beneficiation, tungsten concentrate will enter gravity separation process. Crush means crushing tungsten concentrate into same specification before it goes to the next step. This needs to be completed with crusher.

Tungsten powder is usually produced by hydrogen reducing tungsten oxide method in industry. The reduced tungsten powder grain shape is irregular, powder property is not so active, piling density is low. With development of technology, spherical tungsten powder has been paying much attention due to its advanced properties.

Painting is indispensable material in industrial equipment, aerial space and our daily life. Coating it on the surface of project will form continuous membrane, which is wear resisting, high temperature resisting and good looking. With development of technology, traditional painting can no longer meet requirement of construction, medical and military industry.

Quantum dot, which is semiconductor nano crystal has diameter smaller or closed to Exciton Bohr radius. It is a kind of quasi - zero wiener material composed by few atoms. Quantum dots due to the quantum confinement of electrons and holes, the continuous band structure becomes a discrete level structure with molecular properties that can fluoresce when excited.

Heteropolyacid with Keggin structure is one of the most active catalysts used in acid-catalyzed reactions and redox reactions. For the hydration and esterification of olefins, the etherification of epoxides, the condensation reaction of olefins and aldehydes, the alkylation of olefins and the epoxidation of olefins and alkylaromatics have good catalytic performance. 

Tungsten disulfide is newly developed material which can reduce friction and save power, its property is better than graphite and molybdenum disulfide. The friction coefficient is 0.03, dry friction property is better than any other material, can be used under high temperature and pressure.

Phosphotungstic acid (H3PW12O40·nH2O) has wide application in heteropolyacids, it is also the most typical catalyst. For the hydration and esterification of olefins, the etherification of epoxides, the condensation reaction of olefins and aldehydes, the alkylation of olefins and the epoxidation of olefins and alkylaromatics have good catalytic performance.

Tungsten is important strategic metal resource, ammonium paratungstate is significant tungsten chemical products. There is strict requirement for ammonium paratungstate purity. Impurity content requirement for APT-0 is potassium, sodium and sulfide content respectively lower than 0.001%, 0.001%, 0.0008%. 

Wolf Minerals Ltd (ASX: WLF)(LON: WLFE) has released a quarterly update on operations at its Drakelands tungsten mine in Devon, England.