Typical process of extracting gold from resin in pulp
2020-09-30 11:14Introduction：Typical process of extracting gold from resin in pulp The resin in pulpprocess is similar to the carbon in pulpprocess for the extraction of gold without filtration. At present, it is mainly used in the traditional cyanidation process cont
Typical process of extracting gold from resin in pulp
The resin in pulp process is similar to the carbon in pulp process for the extraction of gold without filtration. At present, it is mainly used in the traditional cyanidation process containing clay, graphite, asphalt shale, iron oxide and other natural adsorbents, as well as complex gold ores such as arsenic gold ores. There are also two ways of resin pulp leaching. One is to add exchange resin to leaching pulp to adsorb gold after cyanide leaching, the other is to add exchange resin and cyanide to the leaching adsorption tank to extract gold while leaching. At present, Rip is the main way of application, and there are still many difficulties in the application of (RIL).
In addition to the adsorption of gold and silver, a considerable amount of base metals were also adsorbed by the saturated resin loaded with gold. In order to improve the purity of the solution, the gold and silver were separated from these base metals by stepwise elution and the adsorption ability of the exchange resin was restored. Fig. 5-40 shows the process of AM-2B anion exchange resin regeneration with gold bearing saturation in a former Soviet Union. The process is typical for all resin in pulp gold extraction plants in the former Soviet Union. The regeneration process consists of 9 operations, which are sometimes omitted according to the actual situation. When leaching pulp contains a large number of heavy non-ferrous metal ions, the whole regeneration process takes 259 hours, mainly washing (4 hours), cyanide to remove iron and copper (30 hours), acid washing to remove zinc and cobalt (30 hours), and thiourea to desorption gold and silver (about 100 hours), alkali neutralization transition (30 hours) and other operations, each desorption operation has a corresponding washing operation.
