A method for enriching and separating lead-zinc mixed concentrate from gold concentrate cyanidation tailings

Abstract

The invention relates to a method for enriching and separating lead and zinc mixed concentrates from gold concentrate cyaniding tailings. The method comprises the following steps: 1) enrichment of thelead and zinc mixed concentrates: cyaniding tailings are pulped by using water after extraction of gold, silver and copper; then, an activating agent is added in the pulp for stirring and activatingby 20-40 min; isopropyl ethyl thiamate is added for flotation; the flotated concentrates are the lead and zinc mixed concentrates; and the remains are sulfur concentrates; and 2) separation of the lead and zinc mixed concentrates: the lead and zinc mixed concentrates are pressed, filtered and dehydrated to prepare filter cakes; the filter cakes are mixed with the water for pulping; activated carbons, zinc sulfate and sodium thiosulfate are added in the pulp for stirring by 90-120 min to inhibit zinc; finally, ethyl nitrogen is added for flotation; the flotated matters are lead concentrates; and the remains are zinc concentrates. The method can further effectively recover gold, silver and copper from the gold concentrate cyaniding tailings, improves comprehensive utilization of resources, and reduces resource wastes.

Description

technical field

[0001] The invention relates to a method for enriching and separating lead-zinc mixed concentrate from gold concentrate cyanidation tailings, which belongs to the technical field of gold smelting and flotation beneficiation, and relates to the technical field of comprehensive utilization of smelting tailings resources. Background technique

[0002] In the gold concentrate suitable for direct cyanidation system treatment (referring to gold ore with an average gold grade of 50-60g / t), in addition to gold and silver, it also contains a certain amount of valuable metals such as copper, lead, and zinc. Due to the regional differences of gold concentrates and their complex sources, the contents of lead and zinc in gold concentrates are different. The high lead content can reach about 10%, and the high zinc content can reach about 15%. In the prior art, after the gold concentrate is directly cyanided to extract gold and silver, the cyanidation tailings are successiv...