Flotation separation method for high-sulfur copper-zinc ore
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A high-sulfur copper-zinc separation method technology, applied in flotation, solid separation, etc., can solve the problems of difficult to effectively suppress zinc minerals, waste of resources, sticky copper flotation foam, etc., to increase the mineralization effect and reduce mechanical Entrainment, solve the effect of foam stickiness
Inactive Publication Date: 2021-09-03
NORTHWEST RES INST OF MINING & METALLURGY INST
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Problems solved by technology
In actual production, there are often problems that the zinc content of copper concentrate is too high or the copper content of zinc concentrate exceeds the standard.
In addition, in the actual production of the dressing plant, most of the dressing plants also have some problems in the application of backwater. The tailings backwater is used repeatedly for a long time, and the Cu in the backwater 2+ , Ca 2+ 、Na + The content of metal ions and other metal ions increases year by year, which eventually leads to sticky copper flotation foam, and it is difficult for zinc minerals to be effectively suppressed. The loss in the mine is relatively large, and the sorting index gradually deteriorates, resulting in a serious waste of resources
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Embodiment 1
[0058] A copper-zinc ore in Xinjiang contains 1.38% Cu, 3.17% Zn, 17.13% S, and 32.14g / t silver. The pyrite content in the mineral content of the ore reaches more than 20%. The recyclable elements in the ore are Cu, Zn and Ag, which belong to high-sulfur associated gold-silver-copper-zinc sulfide ores. Metal minerals are mainly pyrite, followed by chalcopyrite, sphalerite, pyrrhotite and so on. Most of the metal minerals have a simple intercalation relationship, some chalcopyrite is finely grained and wrapped by pyrite, sphalerite and gangue; a small amount of pyrite is disseminated and dispersed in the gangue, and the cracks are filled with chalcopyrite, sphalerite and gangue. Sphalerite, etc.; the particle size distribution of pyrite, chalcopyrite, and sphalerite is basically uniform; the distribution of silver minerals is extremely uneven, and the particle size is generally less than 0.05mm, mainly occurring in chalcopyrite. The closed-circuit test results of Example 1 are...
Embodiment 2
[0079] A copper-zinc ore in Tibet contains 0.43% Cu, 2.33% Zn, 15.50% S, and 6.10g / t silver. The recyclable elements in the ore are Cu, Zn and Ag, which belong to high-sulfur copper-zinc sulfide ores. The metal minerals are mainly pyrite, pyrrhotite, chalcopyrite and sphalerite. Gangue minerals are mainly epidote, calcite, quartz, sericite, and plagioclase. The particle size distribution of chalcopyrite is uneven, and it belongs to fine-grained intercalation; sphalerite is the main zinc-bearing mineral, and it is closely related to pyrite, chalcopyrite, and pyrrhotite intercalation, and some of them are encased and contiguous. Difficult to monomer dissociation. The closed-circuit test results of Example 1 are shown in Table 2.
[0080]The specific process is as follows:
[0081] ⑴ Grinding:
[0082] The crushed high-sulfur copper-zinc raw ore and water are added to a ball mill for grinding at a mass ratio of 1:1, and lime (a) 800g / t is added according to the dry ore weigh...
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Abstract
The invention relates to a flotation separation method for high-sulfur copper-zinc ore, which comprises the steps of (1) grinding crushed high-sulfur copper-zinc raw ore to obtain ore pulp; (2) under the condition that the pH value of the ore pulp is 7-8, adding inhibitors, namely, sodium sulfite and zinc sulfate, a collecting agent, namely, butyl xanthate and a collecting foaming agent, namely, ester-23 for copper roughing, and respectively obtaining copper rough concentrate ore pulp and roughing tailing ore pulp; (3) enabling the copper rough concentrate pulp to be subjected to three-time concentration operation, and obtaining copper concentrate; (4) conducting copper scavenging operation on the roughing tailing pulp twice, and obtaining copper scavenging tailings; (5) sequentially adding lime, copper sulfate, butyl xanthate serving as a collecting agent and 2 # oil into the copper scavenging tailings for zinc roughing, and respectively obtaining zinc rough concentrate ore pulp and zinc roughing tailing ore pulp; (6) carrying out three times of concentration operation on the zinc rough concentrate pulp to obtain zinc concentrate; and (7) conducting zinc scavenging operation on the zinc roughing tailing pulp twice, and obtaining zinc scavenging tailings. Efficient flotation separation of copper and zinc is achieved, and copper flotation return water and zinc flotation return water are recycled.
Description
technical field [0001] The invention relates to the technical field of non-ferrous metal beneficiation, in particular to a flotation separation method for high-sulfur copper-zinc ore. Background technique [0002] The research on the flotation of copper-zinc sulfide ore is a topic that mineral processing workers have paid more attention to in recent years. Since most copper-zinc sulfide ores have the characteristics of low grade, complex symbiosis and fine particle size, the separation of copper and zinc is difficult, and the ore dressing is difficult. Because the flotation separation of copper-zinc ores is relatively difficult, there are various conventional flotation processes at home and abroad, such as priority, mixing, partial priority or mixed flotation, etc. At the same time, in order to fully dissociate copper-zinc minerals, multi-stage mills are used. Mine and zinc inhibitors also use a variety of combined agents, and some also use oxidation, heating and other meth...
Claims
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