The hydrometallurgy of tungsten mainly focuses on the whole production process of preparing tungsten trioxide from wolframite concentrate: It is divided into 6 sections: crushing alkali boiling, purification, and impurity removal, synthesis of scheelite, decomposition of hydrochloric acid, ammonia solution crystallization, drying, and calcination. The main production equipment of hydrometallurgy is a ball mill, jacketed alkali boiling mixing tank, filter press, purification tank, synthesis tank, drum vacuum filter, enamel reaction pot, calciner, etc.
Broken alkali boiling:
Fe(Mn)WO4+2NaOH=Na2WO4+Fe(Mn)(OH)2↓
The key to this process is how to improve the decomposition rate of tungsten in concentrate and the recovery rate of tungsten in iron-manganese slag.
