Extraction of Tungsten from Tungsten Fine Mud by Caustic Soda Autoclaving.

After the 12th cycle, the concentrations of Mo and As in the caustic leaching solution increased from 0.015 to 0.078 g/L and from 1.60 to 10.64 g/L, respectively. Si and P showed a trend of first increasing and then decreasing with an increasing number of cycles, with the decreasing trend starting after the seventh and third cycles, respectively.

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