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Flotation method of calcium-oxide-inhibited pyrite

A technology of pyrite and calcium oxide, applied in flotation, solid separation and other directions, can solve the problems of high cost, insufficient environmental protection, poor activation effect, etc.

Pending Publication Date: 2021-06-25
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The main purpose of the present invention is to provide a kind of flotation method of pyrite suppressed by calcium oxide, to solve the prior art when the pyrite suppressed by high calcium and high alkali is carried out, the activation effect is poor, or High cost, not enough environmental protection and other issues

Method used

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  • Flotation method of calcium-oxide-inhibited pyrite

Examples

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Comparison scheme
Effect test

Embodiment 1

[0037] A copper-sulphur mine adopts a strong alkali process to separate copper and sulfur. The copper beneficiation tailings are suppressed pyrite pulp. The weight content of pyrite in the pulp is 15% (calculated as dry ore), and other gangue minerals mainly It is silicate minerals such as quartz and feldspar, and the pH value of the slurry is 12.1. as per figure 1 The flotation process shown is as follows:

[0038] Put the suppressed pyrite pulp in the first mixing tank, add ferrous sulfate to it, the addition amount is 5000g / t pulp dry weight, stir for 4min, the final pulp pH is 8.2, and form an activated pulp;

[0039] Put the primary activated pulp in the second mixing tank, add citric acid in the amount of 400g / t pulp dry weight, stir for 4min, and form the secondary activated pulp;

[0040] Put the secondary activated pulp in the third mixing tank, add copper sulfate to it, the addition amount is 50g / t of pulp dry weight, and add collector butyl xanthate, the addition ...

Embodiment 2

[0043] A lead-zinc-sulphide mine adopts a strong alkali process to suppress pyrite, and the tailings of zinc beneficiation are suppressed pyrite pulp. The content of pyrite in the pulp is 17% (calculated as dry ore), and other gangue minerals are mainly It is silicate minerals such as quartz, feldspar and pyroxene, and the pH value of the pulp is 11.8. as per figure 1 The flotation process shown is as follows:

[0044] Put the suppressed pyrite pulp in the first mixing tank, add ferrous sulfate to it, the addition amount is 4500g / t pulp dry weight, stir for 4min, the final pulp pH is 8.0, and form an activated pulp;

[0045] Put the primary activated pulp in the second mixing tank, add citric acid to it, the addition amount is 450g / t pulp dry weight, stir for 4min, and form the secondary activated pulp;

[0046] Put the secondary activated pulp in the third mixing tank, add copper sulfate to it, the addition amount is 50g / t of pulp dry weight, and add collector butyl xanthat...

Embodiment 3

[0049] A copper-lead-zinc-sulphide mine uses a strong alkali process to suppress pyrite, and the tailings of zinc dressing are suppressed pyrite pulp. The content of pyrite in the pulp is 11% (calculated as dry ore), and other gangue minerals It is mainly silicate minerals such as quartz, feldspar and pyroxene, and the pH value of the pulp is 11. as per figure 1 The flotation process shown is as follows:

[0050] Put the suppressed pyrite pulp in the first mixing tank, add ferrous sulfate to it, the addition amount is 2500g / t pulp dry weight, stir for 4min, the final pulp pH is 8.2, and form an activated pulp;

[0051] Put the primary activated pulp in the second mixing tank, add citric acid to it in an amount of 350g / t pulp dry weight, stir for 4min, and form the secondary activated pulp;

[0052] Put the secondary activated pulp in the third mixing tank, add copper sulfate to it, the addition amount is 50g / t dry weight of the pulp, add collector amyl xanthate, the addition...

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Abstract

The invention provides a flotation method of calcium-oxide-inhibited pyrite. The method comprises the following steps: S1, adding ferrous sulfate into ore pulp of pyrite inhibited by calcium oxide for primary activation to obtain primary activated ore pulp; S2, adding citric acid into the primary activated ore pulp for secondary activation to obtain secondary activated ore pulp; S3, adding copper sulfate into the secondary activated ore pulp for tertiary activation to obtain tertiary activated ore pulp; and S4, performing flotation on the third-time activated ore pulp to obtain pyrite sulfur concentrate. According to the method, the ferrous sulfate, citric acid and copper sulfate composite agents are adopted as activating agents for combined use, and the activating effect is enhanced through sequential adding and step-by-step activation, so that the flotation speed can be effectively increased, and the grade and the recovery rate of the sulfur concentrate are improved. Meanwhile, by selecting the composite agents, the cost is relatively low, ammonia gas and the like are not released, and the environmental protection property is higher.

Description

technical field [0001] The invention relates to the field of hydrometallurgy, in particular to a method for flotation of pyrite inhibited by calcium oxide. Background technique [0002] Pyrite is the most common sulfide mineral distributed in the earth's crust, and it is the main raw material for producing sulfuric acid and sulfur in my country. In addition, pyrite has good application prospects in many fields such as solar cell materials, petrochemical industry and heavy metal wastewater treatment. At the same time, pyrite is the most important cause of the formation of acid mine wastewater, causing a greater burden on the environment. Therefore, pyrite has two attributes of resources and environment, and it is necessary to rationally develop and utilize pyrite resources. [0003] Pyrite is mostly symbiotic with copper, nickel, lead, zinc and other minerals. In the flotation process of non-ferrous metal sulfide ores, the suppression or separation of pyrite is very common ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/00B03D1/002B03D1/008B03D103/02
CPCB03D1/00B03D1/002B03D1/008B03D2203/02
Inventor 刘志国康金星王传龙于传兵宋磊郭素红王亚运王鑫
Owner CHINA ENFI ENGINEERING CORPORATION
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