A method for comprehensive recovery of gold, antimony and lead from flotation tailings

Abstract

The invention provides a method for comprehensively recovering gold, antimony and lead from flotation tailings, belonging to the technical field of resource comprehensive utilization. The method first removes the slime in the flotation tailings by gravity, then grinds the gravity concentrate and carries out mixed flotation of gold, antimony and lead, and then grinds the concentrate of mixed flotation to suppress antimony and float gold and lead The obtained concentrate is subjected to gold-lead separation flotation, and the obtained tailings are subjected to activated antimony separation to finally obtain gold concentrate, lead concentrate and antimony concentrate. This method pre-enriches coarse-grained minerals through the gravity-selection open-circuit process, throws away a large amount of slime in the flotation tailings, and avoids the adverse effect of the sludge on the subsequent flotation; the mixed flotation full-open-circuit process is beneficial to The continuous body enters the concentrate, which greatly improves the recovery rate of gold, antimony and lead, and at the same time prevents the secondary slime formed by grinding from entering the concentrate. This method has important economic value and environmental protection for the reuse of flotation tailings. benefit.

Description

technical field [0001] The invention relates to the technical field of resource comprehensive utilization, in particular to a method for comprehensively recovering gold, antimony and lead from flotation tailings. Background technique [0002] Pyrite, arsenopyrite, stibnite, galena, etc. are often the carrier minerals of gold. The minerals have similar floatability and are difficult to separate in the flotation process. The nature of gold-bearing polymetallic ores in a certain area in Northwest China is complex, the valuable minerals gold, antimony, and lead are embedded with fine particle size, and the content of easily muddy substances such as mica and chlorite is high, and flotation is difficult, resulting in The high content of gold, antimony and lead has caused a great waste of resources in mines. [0003] ZL201210521689 discloses a method for flotation separation of antimony-gold sulfide minerals. The antimony-gold ore is processed. The antimony-gold ore is firstly gro...

AI Technical Summary

Problems solved by technology

The nature of gold-bearing polymetallic ores in a certain area in Northwest China is complex, the valuable minerals gold, antimony, and lead are embedded with fine particle size, and the content of easily muddy substances such as mica and chlorite is high, and flotation is difficult, resulting in The high content of gold, antimony and lead has caused a great waste of resources to the mine

[0003] ZL201210521689 discloses a method for flotation separation of antimony-gold sulfide minerals. The antimony-gold ore is processed. The antimony-gold ore is firstly ground and then mixed for flotation. Antimony floating process, to obtain gold concentrate and antimony concentrate, the existing problems are high cost of activated carbon drug removal, poor process stability

[0004] "Experimental Research on Flotation Separation of Polymetallic Sulfide Ore Containing Gold, Antimony and Arsenic" records a method of flotation separation of antimony and gold and arsenic. Sodium sulfide and sodium carbonate inhibit stibnite and realize the separation of gold and antimony. The existing problems are that sodium sulfide is easy to oxidize and the cost of chemicals is high.

[0005] "Study on the Flotation Separation of Mixed Concentrates of Galena and Styropyrite" describes a method for the separation of galena and stypyronite, which deals with the separation of galena and stypyronite Mix the concentrate, use activated carbon to remove the drug, and use sodium sulfide, calcium hypochlorite and lime to suppress the brittle stipyronite to obtain lead concentrate and antimony concentrate. There are problems such as high cost of activated carbon drug removal and difficulty in controlling the amount of sodium sulfide

[0006] "Process Exploration of Separation of Lead and Gold" records a method for separating galena and gold, which deals with lead-containing gold ore, suppresses pyrite with lime, sodium carbonate and zinc sulfate, and preferentially selects lead to suppress gold, and obtains Lead concentrate and gold concentrate have the problems of large dosage of chemicals and incomplete separation of gold and lead

[0007] In summary, there is currently no report on the comprehensive recovery of gold, antimony and lead from flotation tailings using the process of gravity separation-grinding-mixed flotation-regrinding-gold, antimony and lead separation

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