Phosphotungstic heteropoly acid is a kind of heteropoly tungstate, is also called keggin type phosphotungstic or dodecaphosphotungstic acid. It is a kind of solid strong acid, can be used as catalyst in organic catalytic reaction. It has excellent catalytic property.
After artificial beneficiation, tungsten concentrate will enter gravity separation. In grinding and tungsten slime recovery process need fine grinding, the equipment is ball mill.
After artificial beneficiation, tungsten concentrate will enter gravity separation process. Grinding process is coarse grinding. Rod mill is to grind tungsten concentrate for the jigging separation in next step.
Centrifugal separator, also known as centrifugal chute, it is the use of mineral particle size and density differences in the high-intensity centrifugal force field, can achieve separation of useful minerals and gangue minerals.
Emulsion ahs three types, water-in-oil type, oil-in-water type, intermediate state double continuous phase microemulsion. In the preparation of tungstate, the oil chemicals commonly used are n-butanol and cyclohexane.
Tungstic acid is an important chemical product of tungsten, it has wide application, chemical formula is mWO3?nH2O. Tungstic acid is poly chemical compound of combination with WO3 and water by different ratio, the common seen tungstic acid includes yellow tungstic acid, white tungstic acid and metatungstate.
Calcium tungstate is also called artificial scheelite, chemical formula is CaWO4, they have same composition but different ding. Tungsten scheelite is original mineral without processing, calcium tungstate is chemical products of tungstate.
Electric separation utilizes different conductivity of mine and vein mineral grain, can process electric classification and separation in high voltage electric field. It is effective method to separate tungsten and tin in tungsten scheelite. But it is also used in tungsten concentrate gravity separation.
Tungsten scheelite is non-conducting but tin is conductive. Use power classification can separate them effectively. So tungsten scheelite electric separation is invented.
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.