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A technology of pyrrhotite and sphalerite, applied in flotation, solid separation, etc., can solve the difficult problems of flotation and separation of lead-zinc sulfide ore, and achieve the effect of guaranteed grade and high recovery rate
Inactive Publication Date: 2008-06-04
CENT SOUTH UNIV
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[0010] In order to overcome the fatal shortcomings of the flotation of complex lead-zinc sulfide ores containing iron-containing sphalerite and pyrrhotite in the existing flotation process of lead-zinc sul
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Embodiment 1
[0028] A complex lead-zinc-silver sulfide ore containing iron-bearing sphalerite and pyrrhotite in Yunnan. The main metal minerals of this ore are galena, sphalerite and pyrrhotite. The main gangue minerals are quartz, calcite and so on. The oxidation rate of lead in the ore is 11.87%, and the oxidation rate of zinc is 4.87%. The results of multi-element analysis of the ore are shown in Table 1.
[0029] Table 1 Multi-element analysis of raw ore
[0030]
[0031] use as figure 1 Shown technological process, concrete technological parameter is as follows:
[0032] ① Grinding process: lime consumption is 1000g / t raw ore, and the particle size of the grinding overflow product is -0.074mm, accounting for 60%. The dosage is 800g / t raw ore, the slurry potential is kept at 320mV (relative to the hydrogen standard potential), and the slurry pH is 9.0.
[0033] ②The first flotation of lead: the flotation concentration is 30%, the dosage of sodium diethyldithioamidophosphate is 2...
Embodiment 2
[0038] A complex lead-zinc-silver sulfide ore containing iron-bearing sphalerite and pyrrhotite in Inner Mongolia. The main metal minerals of this ore are galena, sphalerite, pyrrhotite, and arsenopyrite. The main gangue minerals are feldspar, quartz, calcite and so on. The oxidation rate of lead in the ore is 9.66%, and the oxidation rate of zinc is 5.31%. The results of multi-element analysis of the ore are shown in Table 2.
[0039] Table 2 Multi-element analysis of raw ore
[0040]
[0041] use as figure 1 The process flow is shown, and the specific process parameters are;
[0042] ① Grinding process: lime consumption is 1000g / t raw ore, and the particle size of the grinding overflow product is -0.074mm, which accounts for 75%; The dosage is 1000g / t, the pulp potential is kept at 280mV (relative to the hydrogen standard potential), and the pulp pH is 10.0.
[0043]②The first flotation of lead: the flotation concentration is 30%, the dosage of sodium diethyldithioami...
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Abstract
The invention discloses a lead and zinc flotation method to ferreous blende and pyrrhotite typed complex lead zinc silver sulphide ore, mainly comprising lead ore branch flotation which controls the electrochemical conditions of the flotation and the zinc and sulfur flotation separation which controls the electrochemical conditions of the flotation. The invention has the advantages of implementing the lead-zinc sulfur separation by adopting twice branch flotation, carrying out fast flotation to the lead ore by using a novel composite catching agent to the galena and silver ore with easy floating coarse grains under the conditions of higher ore pulp potential and low pH; the normal flotation of the lead ore with difficultly floated fine grains is carried out under the conditions of lower ore pulp potential and high pH. The pH of the ore pulp is adjusted to more than 12 by lime for the gangue after the lead is floated; the iron blende is activated by bluestone; the iron blende is recovered by the catching agent with the same type of the lead sulfide floatation, thus leading the property of the lead flotation waste water to be basically consistent with that of the zinc flotation waste water and being beneficial for the circular application of floatation waste water.
Description
technical field [0001] The invention relates to the field of mineral flotation, in particular to a method for performing lead-zinc flotation on iron-containing sphalerite and pyrrhotite type complex lead-zinc-silver sulfide ores. Background technique [0002] Most of the lead-zinc mines in my country are polymetallic sulfide ores, which are generally divided into two types. One is the ore whose main purpose minerals are galena, sphalerite and pyrite, such as Guangdong Fankou lead-zinc mine, Qinghai Xitieshan lead-zinc mine; another ore with galena, sphalerite and pyrrhotite as the main target minerals has a high lead oxidation rate, and the galena contained in the ore, due to the embedded Particle size, oxidation and other reasons have different flotation properties, some are easy to float, and the coarse-grained and easy-floating galena has a high content of metallic silver. For example, the lead-zinc mine in the mining area in southern Yunnan is called iron-bearing sphalerit...
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