Recovery Process for Valuable Metals in Tungsten Residues

The invention provides a recovery process for valuable metals in tungsten residues.

The tungsten residue treatment method comprises the following steps of: boiling tungsten residues and 15%-25% of hydrochloric acid for acid dissolution, further adding NaF and sodium nitrate, and filtering to obtain filtrate after the end of the reaction; then extracting tungsten from the filtrate by adopting N235, and evaporating, crystallizing and drying a stripping solution to obtain APT (ammonium paratungstate); and performing alkali dissolution on filtration residues, and performing pressure filtration to directly recover Ta, Nb and Sn valuable metals. Tungsten, scandium, iron, manganese, tin, copper, tantalum and niobium valuable elements and the like in the tungsten residues can be comprehensively recovered, thus the recovery cost is reduced.

The recovery process disclosed by the invention further has the advantages of good environmental benefits and low cost. According to the recovery process disclosed by the invention, the acid is adopted for dissolving the tungsten residues, the tungsten and the scandium are recovered under acid conditions, the other elements are simultaneously recovered, and the process is simple.


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