The Method for Sodium Tungstate

Brief description of this technology:
By supplying an oxidant constituted by sodium nitrate or sodium nitrite, the tungsten-containing material and an oxidant contact with each other in an oxygen-containing atmosphere. Furthermore they can continuously generate a reaction product,  so as to the method for sodium tungstate. This method  can be used  to collect tungsten and the apparatus of the preparation of sodium tungstate.


The invention also provides  a method of preparing an aqueous solution of sodium tungstate.  After placing  the reducing agent into a solution containing the above reaction product, the melt is dissolved in water.And this method is the good way to  collect the tungsten.



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