Flotation separation method of refractory lead-zinc sulfide ore and sphalerite inhibitor of refractory lead-zinc sulfide ore

Abstract

The invention discloses a flotation separation method of refractory lead-zinc sulfide ore and a sphalerite inhibitor of the refractory lead-zinc sulfide ore, the sphalerite inhibitor is a composition of calcium hypochlorite and carbonized sodium cyanurate, the mass ratio of calcium hypochlorite to carbonized sodium cyanurate is 1: (2 to 4), and the inhibitor composition can have a strong inhibition effect on sphalerite. The invention further provides a flotation separation method of the refractory lead-zinc sulfide ore, the refractory lead-zinc sulfide ore is subjected to ore grinding and grading treatment and size mixing, a sphalerite activating agent, a flotation collecting agent and a foaming agent are added, then inflation flotation is conducted, lead-zinc bulk concentrate dense underflow is obtained through regrinding and thickening, and the sphalerite inhibitor and a galena collecting agent are added for flotation separation; and the separated lead rough concentrate is subjected to sphalerite inhibition and repeated concentration to obtain lead concentrate, the galena collecting agent is added into the separated lead rough concentrate for repeated lead scavenging to obtain zinc concentrate, and therefore the refractory lead-zinc sulfide ore is economically and efficiently separated and enriched, and the method has wide industrial application prospects.

Description

technical field [0001] The invention relates to the field of mineral processing, and specifically provides a flotation separation method for refractory lead-zinc sulfide ore and a sphalerite inhibitor. Background technique [0002] Lead-zinc metal is widely used in various industries and is an important mineral resource in my country. Lead-zinc sulfide ore is the main industrial mineral raw material for lead-zinc smelting at home and abroad. my country has been a big producer and consumer of lead and zinc metal for many years. To meet the growing domestic demand for lead-zinc metals, it is an important way to improve the development level of my country's lead-zinc metal industry by strengthening the separation effect of lead-zinc flotation of lead-zinc sulfide ore, improving the comprehensive recovery rate of associated precious metals and reducing the cost of beneficiation. [0003] Compared with foreign lead-zinc sulfide mines, my country's lead-zinc sulfide deposits genera...

AI Technical Summary

Problems solved by technology

However, as the development and utilization of easy-to-select lead-zinc sulfide ores are exhausted, the separation effect of lead-zinc is poor when using conventional floating lead-inhibiting zinc technology to treat refractory lead-zinc sulfide ore with dense disseminated and veinlet disseminated ore structures. 1. High zinc mutual content in lead concentrate, large amount of zinc sulfate, fine grinding is necessary to achieve full dissociation of lead-zinc minerals in the process of floating lead and zinc suppression, which leads to high beneficiation costs, and other factors that lead to difficulties in lead-zinc separation include the principle process Suitability, selectivity of collectors for lead minerals, inhibitors for zinc minerals, etc.,

[0004] In recent years, domestic beneficiation workers have done more research on lead-zinc mines, and achieved fruitful results. For example, patent CN109174467A provides a combination agent containing ferricyanide and zinc sulfate to inhibit zinc minerals. Although the inhibitor can effectively improve the Inhibitory effect of sphalerite, but ferricyanide will decompose highly toxic hydrocyanic acid under sunlight or ultraviolet light, which is not conducive to the storage and use of pharmaceuticals, and ferricyanide will leave hydrogen cyanide after use Acid in the waste liquid will pollute the environment and increase the difficulty of treatment

Patent CN112246443A also provides a combination inhibitor of sphalerite using copper sulfate and pectin to strengthen the inhibitor effect on sphalerite, but there is a need for sphalerite that is strongly suppressed by the combined inhibitor because the amount of copper sulfate is too large. Continue to add a large amount of copper sulfate to achieve reactivation and other problems, and excessive copper sulfate has the hidden danger of heavy metal ions exceeding the standard in flotation wastewater, and the inhibitor has limited inhibitory effect on sphalerite, so it is necessary to increase the grinding fineness in the grinding step. degree, the grinding cost is higher

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