Flotation separation technology for high-sulfur and low-grade lead-zinc ore

Abstract

The invention discloses a flotation separation technology for a high-sulfur low-grade lead-zinc ore. The technology is provided against the characteristics of low galena and sphalerite content and extremely high pyrite content of the high-sulfur and low-grade lead-zinc ore and serious unbalance of the proportions of the lead-zinc mineral content and the pyrite mineral content in the ore. The principle flow of floatability of sulfur and the like is adopted in the lead-zinc-sulfur flotation separation process flow design to make a part of pyrite with good floatability preferentially float upwards together with galena, lead-sulfur separation is carried out, a part of pyrite with poor floatability and sphalerite in tailings are subjected to flotation, and then zinc-sulfur separation is carriedout. The technology avoids strong pressure and strong tension of a large amount of pyrite, reduces the use amounts of medicaments and also reduces the loss of lead-zinc ore in pyrite. Compared with atraditional lead-zinc-sulfur full-priority flotation process, a lead-sulfur mixed separation-lead-sulfur separation-tailing zinc separation process, a priority lead separation-tailing zinc-sulfur mixed separation-zinc-sulfur separation process or other derived processes, the technology of the invention has the advantages of good index, stable process, low medicament consumption and the like.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to a flotation separation process of high-sulfur and low-grade lead-zinc ore. Background technique [0002] The beneficiation process of sulfur-containing lead-zinc ore mainly includes lead-sulfur mixed separation-lead-sulfur separation-tailings zinc separation process, lead-zinc-sulfur full priority flotation process, priority selection of lead-zinc-sulfur mixed separation-zinc-sulfur separation process And other processes derived from the above three processes. In general, the order of floatability of minerals is: galena > sphalerite > pyrite, but in some ores, the floatability of pyrite is better than sphalerite. The selection of beneficiation process should be based on the difference and order of buoyancy among the main metal minerals in the ore, make full use of the difference in buoyability of each mineral, and minimize strong pressure and pulling...

AI Technical Summary

Problems solved by technology

In the process of forcibly inhibiting pyrite, there are disadvantages that the main metal minerals are easily inhibited and cause loss under the condition of large amount of inhibitor and excessive inhibitor, especially high-sulfur and low-grade lead-zinc ore. When the ratio is seriously unbalanced, the forced suppression of pyrite causes the loss of main metals to be more obvious

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