Combined inhibitor and micro-fine particle copper-zinc bulk concentrate flotation separation method

Abstract

The invention relates to the field of mineral flotation reagents, and concretely relates to a combined inhibitor and a micro-fine particle copper-zinc bulk concentrate flotation separation method. The method comprises the following steps: stirring the copper-zinc bulk concentrate to remove a reagent, then grinding the copper-zinc bulk concentrate, and adding a combined inhibitor in the grinding process; and then sequentially adding a collecting agent and a foaming agent for flotation separation to obtain copper concentrate and zinc concentrate. The combined inhibitor comprises one of three combined inhibitors including citric acid + sodium pyrosulfite, citric acid + sodium thiosulfate, and citric acid + sodium pyrosulfite + sodium thiosulfate, and the dosage of each combined inhibitor is as follows: citric acid + sodium pyrosulfite: (60-180 g / t) + (800-2000 g / t), citric acid + sodium thiosulfate: (60-180 g / t) + (800-2000 g / t), and citric acid + sodium pyrosulfite + sodium thiosulfate: (60-180 g / t) + (800-2000 g / t) + (800-2000 g / t). The method has the advantages of being simple in technological process, free of toxicity and pollution, environmentally friendly, high in applicability and the like, and bulk concentrate of the micro-fine-particle copper-zinc sulfide ore can be effectively separated.

Description

technical field [0001] The invention relates to the field of mineral flotation reagents, in particular to a combined depressant. In addition, the invention relates to the technical field of separation of copper-zinc sulfide minerals. Background technique [0002] Copper-zinc metal is widely used in today's society, and it is an indispensable raw material for my country's strategic security and national economic development. With the rapid development of the national economy, the consumption of copper-zinc metal is also increasing rapidly. my country has a lot of copper-zinc mineral resources, but most of them are refractory ores with high sulfur content and complex structure. Due to the ore is easy to oxidize, dense symbiosis, sphalerite is easy to be destroyed by Cu 2+ Ion activation, high sulfur content and other reasons usually cause difficulties in flotation and separation of copper and zinc minerals in the beneficiation process of copper sulfide zinc ore. [0003] In ...

AI Technical Summary

Problems solved by technology

my country has a lot of copper-zinc mineral resources, but most of them are refractory ores with high sulfur and complex structure

Due to the ore is easy to oxidize, dense symbiosis, sphalerite is easy to be destroyed by Cu 2+ Ion activation, high sulfur content and other reasons usually cause difficulties in flotation and separation of copper and zinc minerals in the beneficiation process of copper sulfide zinc ore

[0003] In the current production practice, the flotation process of copper and zinc separation generally adopts the method of zinc suppression and floating copper. Zinc inhibitors mainly include zinc sulfate, sodium sulfite, sodium sulfide, cyanide, etc., among which cyanide is a toxic substance , inconvenient operation and management, greater harm to the environment, and difficult to treat flotation wastewater, so it is rarely used

However, non-toxic inhibitors such as zinc sulfate and sodium sulfite have a weak inhibitory effect on zinc, and the flotation effect is not good. The grade of the separated concentrate is not high, and the metal mutual content rate is high.

Due to the many problems in the current copper-zinc separation process, the flotation separation effect of copper-zinc mixed concentrate in my country is not good, and it is difficult to obtain high-grade copper concentrate and zinc concentrate. Therefore, it is urgent to find a non-toxic, harmless, A selective inhibitor and flotation separation process that is safe, environmentally friendly, easy to use, and has a strong separation effect

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