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Flotation method for copper-molybdenum sulfide ore

A copper-molybdenum sulfide and copper-molybdenum ore technology, applied in flotation, solid separation and other directions, can solve the problems of large consumption, easy oxidation of sodium sulfide, and inability to stably control the reduction potential of pulp, and achieve the effect of reducing the amount and achieving excellent results.

Active Publication Date: 2020-05-19
NANHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of this method is that sodium sulfide is easily oxidized in the air, the reduction potential of the pulp cannot be stably controlled, and the consumption is large.
However, the disadvantage of this method is that the flotation method is complex and cumbersome, and the separation effect of copper and molybdenum has not been greatly improved.

Method used

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  • Flotation method for copper-molybdenum sulfide ore
  • Flotation method for copper-molybdenum sulfide ore
  • Flotation method for copper-molybdenum sulfide ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Copper-molybdenum sulfide mineral raw materials: chalcopyrite and molybdenite, containing 27% copper and 0.54% molybdenum. Its flotation method comprises the steps:

[0041] S1. Pretreatment: Crushing and grinding the raw copper-molybdenum ore until the fineness is -74+45 μm and the content accounts for 85%, and then performing desliming pretreatment to prepare copper-molybdenum ore slurry with a concentration of 35%.

[0042] S2. Mixed flotation: adjust the copper-molybdenum ore pulp with HCl and / or NaOH to adjust the pH value to 9, and add 0.2 kg / t of kerosene collector and 0.1 kg / t of terpineol oil as a foaming agent , carry out a mixed flotation process (such as figure 1 Shown), to obtain copper-molybdenum mixed concentrate.

[0043] S3. Separation of copper and molybdenum: the copper-molybdenum mixed concentrate is made into a mixed pulp with a concentration of 30%, and the pH value is adjusted to 10. The mixed pulp is added to the externally controlled potential...

Embodiment 2-3

[0051] The difference from Example 1 is that the first pH value in the mixed flotation is different, and other steps are the same as in Example 1, and will not be repeated here.

[0052] Table 2 is the setting of the first pH value in the mixing flotation of embodiment 1-3

[0053] Example Mixed Flotation First pH Example 1 9 Example 2 8 Example 3 10

[0054] In the present invention, chalcopyrite and molybdenite have a higher flotation recovery rate in a slightly alkaline environment. In the embodiment of the present invention, collector kerosene and foaming agent terpineol oil have been added to play a strengthening role, which can strengthen the flotation collection effect of chalcopyrite and molybdenite, so that the floating rate of chalcopyrite and molybdenite All reached more than 95%.

Embodiment 4-6

[0056] The difference from Example 1 lies in the difference between the external control potential and the second pH value in the separation and flotation of copper and molybdenum, and other steps are the same as those in Example 1, and will not be repeated here.

[0057] Table 3 is the setting of the external control potential and the second pH value in the separation flotation of copper and molybdenum in embodiment 1 and embodiment 4-6

[0058]

[0059] Under the external control potential, both chalcopyrite and molybdenite have good buoyancy in weak alkaline environment, but molybdenite has better floatability than chalcopyrite. Therefore, the externally controlled reduction potential flotation in a weakly alkaline environment is beneficial to the flotation separation of chalcopyrite and molybdenite, and the pH value of separation flotation is preferably 11.

[0060] Both the buoyancy of chalcopyrite and molybdenite are affected by the externally controlled reduction pot...

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Abstract

The invention provides a flotation method for copper-molybdenum sulfide ore. The method comprises the following steps: carrying out crushing, ore grinding and desliming pretreatment on raw copper-molybdenum ore to prepare copper-molybdenum ore pulp with a concentration of 30-40%; adding the copper-molybdenum ore pulp into a flotation device, adding a collecting agent kerosene and a foaming agent terpenic oil under the condition of a preset pH value, and carrying out a bulk flotation process of sequentially returning middlings through first roughing, second concentration and second scavenging to obtain copper-molybdenum bulk concentrate; and finally preparing mixed ore pulp with a concentration of 25-35% from the copper-molybdenum bulk concentrate, adjusting to a preset pH value and a preset external control potential, adding a copper inhibitor and / or a collecting agent kerosene, and carrying out a flotation process of sequentially returning middlings through first roughing, fourth concentration and second scavenging, and separating to obtain copper concentrate and molybdenum concentrate. According to the method, the copper-molybdenum separation flotation process is carried out by combining an external control potential flotation mode with a copper inhibitor, so that the process is stable and controllable, the recovery rate of copper-molybdenum resources in raw ore is high, andthe copper-molybdenum separation effect is remarkable.

Description

technical field [0001] The invention relates to the technical field of mineral processing, in particular to a flotation method for copper-molybdenum sulfide ore. Background technique [0002] Both copper and molybdenum are important strategic resources of our country, and they play an irreplaceable role in our national economy and people's lives. With the development of the economy, the demand for copper and molybdenum resources is increasing, but copper molybdenum sulfide ore has more lean ore and less rich ore, serious co-association, many other components, molybdenite and copper sulfide ore have similar buoyancy, etc. Problems make it difficult to separate copper and molybdenum, so the development of copper and molybdenum resources is becoming more and more difficult. [0003] At present, the flotation of copper-molybdenum sulfide ore mainly adopts the beneficiation process of "copper-molybdenum mixed flotation + copper-molybdenum separation". Since copper sulfide ore an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/04B03B1/00
CPCB03B1/00B03D1/04
Inventor 刘永罗鑫尧单启伟薛永明戴兵
Owner NANHUA UNIV
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