Beneficiation method of iron pyrite in lead-zinc flotation tailings

A mineral processing method and flotation tailings technology, applied in flotation, solid separation, etc., can solve the problems of high energy consumption of mineral processing, corrosion of equipment and pipelines, long flotation process, etc., achieve long flotation time, reduce sulfuric acid The amount and power consumption, and the effect of improving the sulfur recovery rate

Inactive Publication Date: 2012-09-05
南京银茂铅锌矿业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the one hand, it is necessary to add a large amount of flotation reagents, especially sulfuric acid, which seriously corrodes equipment and pipelines in flotation production; on the other

Method used

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  • Beneficiation method of iron pyrite in lead-zinc flotation tailings
  • Beneficiation method of iron pyrite in lead-zinc flotation tailings
  • Beneficiation method of iron pyrite in lead-zinc flotation tailings

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Experimental program
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Effect test

Embodiment 1

[0012] In a lead-zinc sulfide ore mine, the raw ore of the lead-zinc sulfide ore contains multiple genera (wt%): Pb 1.5, Zn 2.5, S 31, Fe 25, Ag 88g / t. The sulfur element in the ore mainly exists in the form of pyrite. The flotation process of the concentrator adopts the priority flotation process of lead, zinc and sulfur in sequence. The concentration of sulfur in the lead-zinc floating tailings is about 30%, and the sulfur content is about 31%.

[0013] Take the production lead-zinc flotation tailings sample to do the concentration comparison test, see Table 1, the mass concentration of the lead-zinc flotation tailings is 30% and 50% respectively, add different doses of chemicals, all use the flotation machine for flotation, after A small closed-circuit test was carried out in the laboratory, and the comparison results are shown in Table 1:

[0014] Table 1: Comparative results of selected concentration tests

[0015]

[0016] It can be seen from Table 1 that after conce...

Embodiment 2

[0018] Embodiment 2 selects the ore sample identical with embodiment 1, gets the production lead-zinc flotation tailings sample to do regulator contrast test, see table 2, lead-zinc flotation tailings mass concentration is all 50%, adds different medicaments, all Flotation was carried out by using a flotation machine, and after a small closed-circuit test in the laboratory, the comparison results are shown in Table 2:

[0019] Table 2: Comparative results of modifier tests

[0020]

[0021] It can be seen from Table 2 that for the high-concentration sulfur separation of lead-zinc flotation tailings, the combination of sulfuric acid and ferrous sulfate as a regulator is better than the flotation index of using sulfuric acid or ferrous sulfate alone as a regulator, and can further reduce the amount of sulfuric acid used.

Embodiment 3

[0023] Embodiment 3 selects the ore sample identical with embodiment 1, gets the production lead-zinc flotation tailings sample to do flotation equipment comparative test, see table 3, lead-zinc flotation tailings mass concentration is all 50%, adds identical medicament, The flotation machine and the flotation column were used for flotation respectively. After a small closed-circuit test in the laboratory, the comparison results are shown in Table 3:

[0024] Table 3: Comparison results of flotation equipment tests

[0025]

[0026] It can be seen from Table 3 that compared with the flotation machine, the flotation column produces higher concentrate grades, but the tailings are also high, which has certain limitations.

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Abstract

The invention provides a beneficiation method of iron pyrite in lead-zinc flotation tailings, and by adopting the efficient and clean beneficiation method, the sulfur indexes can be improved, the beneficiation reagent and beneficiation power consumption can be greatly reduced, especially the consumption of sulfuric acid can be reduced, and the corrosion on equipment and pipelines can be relieved. The beneficiation method comprises the following steps: concentrating lead-zinc flotation tailings, adding sulfuric acid, butylxanthate and oil No.2, and carrying out floatation on a first part of soothing concentrate by utilizing a floatation column; adding ferrous sulfate, butylxanthate and oil No.2 into the tailings of the floatation column, and carrying out floatation on a second part of soothing concentrate by utilizing a floatation machine.

Description

technical field [0001] The invention relates to a mineral processing method for pyrite, in particular to an efficient and clean mineral processing method for pyrite in lead-zinc flotation tailings, which can improve the mineral processing index, efficiently utilize the mineral processing agent, and reduce the power consumption of the mineral processing. Background technique [0002] When the traditional lead-zinc sulfide ore flotation tailings recover pyrite, sulfuric acid is often used as the regulator and activator for sulfur selection. After the lead-zinc sulfide ore is flotation lead-zinc sequentially, the flotation concentration of sulfur in the zinc tailings is low. . On the one hand, it is necessary to add a large amount of flotation reagents, especially sulfuric acid, which seriously corrodes equipment and pipelines in flotation production; on the other hand, the flotation process is long and requires multiple flotation machines to ensure sufficient The flotation ti...

Claims

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Application Information

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IPC IPC(8): B03D1/00B03D1/018
Inventor 缪建成刘亚龙马斌胡继华陈如凤范寻
Owner 南京银茂铅锌矿业有限公司
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