Replacing gold wire with zinc recovered from the gold-containing solution more expensive, is zinc wire in substitution box. Its technical operation is as follows:
1. Zinc wire addition   The zinc wire should be loosely and evenly laid on the screen inside the box, and the through hole cannot be left. And add an appropriate amount of zinc wire to each shift to supplement consumption. In order to keep the zinc wire loose, the handle should be shaken up and down frequently, so that the gold mud adhering to the surface of the zinc wire sinks to the bottom of the box, so that the zinc wire exposes the fresh surface, and at the same time, the hydrogen gas can be discharged in time, and the replacement process can be smoothly carried out.
2. Production inspection   Production should always observe any abnormal, if zinc wire surface appears white precipitate, should be appropriate to add cyanide; zinc wire surface was found that red and yellow, with a high copper content description, measures should be discharged interference copper; if zinc wire The surface is covered with mud, indicating that there is too much suspended matter in the precious liquid, and the purification operation should be strengthened. In addition, it is also possible to judge whether the reaction speed is normal by the surface change of the newly added zinc wire.
3. Extracting gold mud   Before the gold mud is extracted, the precious liquid should be stopped first, and then the gold mud should be extracted. It is best to supply the lean liquid to the tank after stopping the supply of precious liquid, so as to push out the precious liquid which is not replaced in the tank. When the tank is filled with the lean liquid, the gold mud is extracted after a while.
The extraction of gold mud should be carried out before and after. First use a siphon to withdraw the supernatant from the gap, and then remove the zinc wire and the screen. All zinc filaments are cleaned with aspirated supernatant, and finally the gold mud is discharged from the gold sludge discharge port and the tank is rinsed clean. Gold mud should pass 3 ×
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