Comprehensive recovery process of silver, lead, zinc and sulfur-containing bulk concentrate

Abstract

The invention discloses a comprehensive recovery process of silver, lead, zinc and sulfur-containing bulk concentrate. The specific process comprises the following steps of: concentrating the silver,lead, zinc and sulfur-containing bulk concentrate serving as a raw material until the solid content percentage concentration is 60-70% to obtain a material a; adding a sphalerite inhibitor and a pyrite inhibitor into the material a, and carrying out ore grinding, scrubbing and reagent removal to obtain a material b; adding a lead-silver collecting agent into the material b, performing lead-zinc sulfur separation flotation including two-stage roughing, two-stage scavenging and three-stage concentration to obtain lead concentrate c and a two-stage lead-zinc sulfur scavenging material d; and adding a pyrite inhibitor and a sphalerite activating agent into the two-stage lead-zinc sulfur scavenging material d, fully stirring for 3-5 minutes to obtain a material e, adding a sphalerite collectingagent into the material e, and performing zinc-sulfur separation flotation including one-stage roughing, two-stage scavenging and two-stage concentration to obtain zinc concentrate f and sulfur concentrate g. Through optimization and improvement of a flotation process and effective use of an inhibitor, loss of silver minerals is effectively avoided, and high separation performance of lead, zinc and iron is achieved.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a comprehensive recovery process of silver-containing lead-zinc-sulfur mixed concentrate. Background technique [0002] Lead-zinc-silver metal is an irreplaceable heavy metal (among which silver is a precious metal) in the current industrial development process. It is widely used in my country's light industry and heavy industry, and is an indispensable important material for national economic development. With the development of world industry, the demand for lead and zinc metals in countries around the world is increasing. China has the largest and most complete manufacturing industry in the world, so its lead and zinc industry plays a pivotal role in the world industry. Although my country's lead-zinc industry has a relatively large production capacity, the level of sorting and processing of existing lead-zinc mines is relatively insufficient compared with many...

AI Technical Summary

Problems solved by technology

When the mixed concentrate is separated by flotation, due to the large amount of reagents left in the mixed flotation, when the lead, zinc, silver and sulfur are separated, the final concentrate product contains serious mutual content, and the effect of efficient separation cannot be achieved.

In the past, a large number of scholars' studies have shown that the floatability of lead sulfide, zinc sulfide and pyrite is not much different. Therefore, there is an urgent need for efficient separation inhibitors to solve the problem of low recovery rate of comprehensive utilization of resources in production.

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