The wet method has the highest recovery rate, extracting \"gold\" from circuit board waste, and this method has a recovery rate of 98%.
The hydrometallurgical process allows the recovery and purification of specific metals from multi-element solutions using techniques such as selective leaching, solvent extraction, electrolytic extraction, the use of chelating resins and precipitation.
In addition, hydrometallurgy has a more selective metal recovery capability compared to fire metallurgy, with the added benefit of reducing gas emissions to the environment, and without any significant investment and operating costs.
Answer, the use of wet extraction method its extraction gold content can generally reach 97 to 98%, wet extraction can be separated solvent extraction and electrolytic extraction, etc., the advantage is that the extraction efficiency is high, environmental pollution is small, low cost. The above is the answer to the above question.