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.
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.
Dry high intensity magnetic separator is mainly used in rougher selection of mild magnetic mineral. Dry high intensity magnetic separator includes roll type high intensity magnetic separator and drum magnetic separator. Magnetic systems are made of high quality ferrite materials or rare earth magnets.
Wet high intensity magnetic separator can be used to recycle tungsten minerals grain with size 0.01mm~3mm. Compared to dry magnetic separator, it is used to recycle fine grains, so it is usually sued in the process of tungsten tailings elimination or tungsten slime rougher selection.
Mechanical agitated flotation machine is the use of impeller + stator system as a mechanical stirrer to achieve the filling and stirring flotation machine, is the most commonly used tungsten scheelite flotation equipment.
Tungsten scheelite associated ore can be divided into sulphide ore and gangue minerals. Sulphide ore has metal element, is easy to separate and has economic value. Gangue minerals contain calcium, only flotation method can separate it.
In flotation mineral slurry, activator distribution is important for flotation. Metal ion attached on the surface of mineral can improve its electric potential, ion collector and targeted mineral can ding better.