Flotation separation method of high grade lead-sulfur mixed concentrate

Abstract

The invention relates to a flotation separation method of a high grade lead-sulfur mixed concentrate, and belongs to the technical field of metal mineral processing. The flotation separation method includes the following steps that (1) a high-grade lead-zinc-sulfur raw ore is ground through a ball mill, ethyl xanthogenate, zinc sulfate and second flotation oil are added for mixed flotation of leadand sulfur, and the lead-sulfur concentrate is obtained; (2) an sodium hydroxide, sodium sulfite, sodium thiosulfate, fulvic acid compound inhibitor is added, the size mixing time is greater than orequal to 5 minutes, and the ore pulp condition achieves that ore pulp electric potential is less than or equal to -260 mV(SHE), pH is greater than or equal to 12, and ore pulp dissolved oxygen is lessthan or equal to 4.5 mg/L; and (3) the purposes of flotation and separation of galena and pyrite are achieved through once roughing, twice concentration (concentration twice supplementation and compound inhibitor) and twice scavenging separation and flotation operation. The flotation separation method is low in cost and high in metal recovery rate, pressure of upstream and downstream operation and water treatment operation can be reduced, adaptability to flotation and separation of a high grade lead-sulfur mixed concentrate difficult to separate is strong, the effect is significant, and industrial production requirements can be met.

Description

technical field [0001] The invention belongs to the technical field of metal mineral processing, and specifically relates to a method for recovering high-grade galena from high-grade lead-sulfur mixed concentrates based on chemical potential regulation and control flotation. Background technique [0002] The lead-sulfur mixed concentrate flotation separation process is mainly a lime high-alkali process, which uses a large amount of lime to suppress pyrite. The lime is not easy to dissolve, and it is easy to settle and block the chemical pipe during the transportation process. It is difficult to add chemicals and the process stability is poor. It is not easy to recycle the continuous organisms, the lead grade in the sulfur concentrate is high, and the lead loss is large; at the same time, the hardness of the return water of the mineral processing is high, the scale of the tank pipe is serious, and the calcium ion in the mixed floating stage greatly reduces the floatability of ...

AI Technical Summary

Problems solved by technology

[0002] The lead-sulfur mixed concentrate flotation separation process is mainly a lime high-alkali process, which uses a large amount of lime to suppress pyrite. The lime is not easy to dissolve, and it is easy to settle and block the chemical pipe during the transportation process. It is difficult to add chemicals and the process stability is poor. It is not easy to recycle the continuous organisms, the lead grade in the sulfur concentrate is high, and the lead loss is large; at the same time, the hardness of the return water of the mineral processing is high, the scale of the tank pipe is serious, and the calcium ion in the mixed floating stage greatly reduces the floatability of the pyrite, resulting in pyrite. Mine is easy to be crossed, thereby reducing the quality of zinc concentrate, resulting in excessive consumption of flotation reagents, and high pressure on environmental protection; for ores with high oxidation rates, the inhibition effect is not ideal, and the dosage of reagents is too large, and it is even difficult to inhibit pyrite to achieve the purpose of lead-sulfur separation.