A clean production technology for tungsten hydrometallurgy

摘要

A new clean production technology for tungsten hydrometallurgy, i.e. technology of caustic soda leaching - direct extraction of tungsten with organic solvent - APT (ammonium paratungstate) crystallization by evaporation, has been porposed. The experimental basis of the new technology has been expounded, and a systematical analysis for the new technology has been given. The result shows that, compared with traditional technology, the new one can reduce greatly the volume of discharged wastewater, and environmental pollution is diminished. At the same time the procedure can be shortened, and the consumption of raw chemical material can be reduced greatly.