What is the process for extracting silver from lead-zinc ores?

Before extracting silver from lead-zinc ore using heap leaching, it is necessary to identify whether the ore is a sulfide ore or an oxide ore. Ore, or insoluble deep red silver ore, light red silver ore, selenium silver ore, sulfur antimony copper silver ore.
 
After clarifying the phases of the above minerals, determine the leaching conditions for cyanide. If it is zinc oxide ore, zinc is easy to dissolve in the cyanide solution, especially smithsonite (ZnCO3), zincite (ZnO), Hydrozincite (3ZnCO3·2H2O) is particularly easy to dissolve in cyanide solution, consumes a large amount of cyanide, and the generated Zn(CN)2 will be deposited on the surface of gold particles to hinder the dissolution of silver. If the ore contains a small amount of lead, it is beneficial to the cyanidation of gold and silver. Lead can eliminate the harmful effects of alkali metal sulfides in the cyanide solution. When leaching argentite (AgS), lead salts can form S2-precipitates into PbS in Na2S, thus promoting the dissolution of silver in cyanide solution, but for complex silver sulfate ores, it does not play the above role. Excessive lead has a certain influence on the leaching rate of gold and silver, and the leaching rate of gold and silver will decrease with the increase of lime dosage.
 
The following measures can be taken to deal with silver-bearing ore:
 
One is leaching with high-concentration cyanide solution (0.2-0.6% NaCN) to ensure the dissolution of silver.
 
Second, the heap leaching ore should have good permeability and porosity to provide the oxygen needed for dissolving silver.