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Copper ore flotation method

A technology for minerals and flotation reagents, applied in flotation, solid separation and other directions, can solve the problems of reducing the floatability of copper sulfide minerals, easy decomposition and failure of vulcanizing agents, long vulcanization reaction time, etc. Stabilize the fluctuation of pulp pH and enhance the effect of hydrophobicity

Active Publication Date: 2021-01-08
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, if the vulcanization reaction time is long, a thick sulfide film is formed on the surface of the mineral, which is beneficial to the flotation of the mineral, but if the vulcanization reaction time is too long, the vulcanizing agent is easy to decompose and fail
In addition, excessive stirring after prolonging the vulcanization time may also easily cause the vulcanization film to fall off
Therefore, in the same flotation system of copper-containing oxide minerals, the addition of vulcanizing agent has both activation and inhibition effects. Using a vulcanizing agent to vulcanize the performance of copper oxide minerals can improve its hydrophobicity and play the role of activated flotation. However, the addition of excessive sulfuration activator will reduce the buoyancy of copper sulfide minerals at the same time, showing a more significant inhibitory effect.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A mixed copper ore, in which the copper grade is 1.82%, the oxidation rate is 32.6%, and the binding rate is 11.5%.

[0045] (1) Grinding and pulping

[0046] After the mixed copper ore is wet-ground, the ore is ground to -74μm, accounting for 90%, the mass concentration of the pulp is adjusted to 33%, and it is added to the copper ore flotation machine and stirred evenly;

[0047] (2) Sulfidation and activation of copper oxide ore to form copper mineral film

[0048] Hydrazine hydrate and sodium hydrosulfide are 1:20 configuration mass concentration to be 5% vulcanization activator solution with mass ratio, add vulcanization activator in the ore pulp of step (1) gained, vulcanization activator add-on is based on dry ore dry agent weight The dosage is 50g / t, the slurry is fully stirred, vulcanized and activated for 6 minutes, and a copper mineral film is formed;

[0049] (3) Selective collection adjustment of copper mineral thin film

[0050] Add 30g / t butyl xanthate...

Embodiment 2

[0065] A certain copper oxide ore has a copper grade of 0.82%, an oxidation rate of 93.6%, and a binding rate of 4.5%.

[0066] (1) Grinding and pulping

[0067] The copper oxide ore is wet-ground, and the ore is ground to -74μm, accounting for 90%. The mass concentration of the pulp is adjusted to 33%. The pulp is added to the flotation machine and stirred evenly;

[0068] (2) Sulfidation and activation of copper oxide ore to form copper mineral film

[0069] Ascorbic acid and sodium sulfide are configured into a vulcanization activator solution with a mass concentration of 10% with a mass ratio of 1:10, and the vulcanization activator is added to the flotation pulp. 300g / t, fully stir the pulp, vulcanize and activate for 6min to form a copper mineral film;

[0070] (3) Selective collection adjustment of copper mineral thin film

[0071] Add 100g / t of sodium hexametaphosphate to the pulp in step (2) as a gangue mineral inhibitor, stir and react for 3min, add 80g / t butyl xa...

Embodiment 3

[0083] A certain copper oxide ore has a copper grade of 2.22%, an oxidation rate of 78.2%, and a binding rate of 16.3%.

[0084] (1) Grinding and pulping

[0085] The copper oxide ore is wet-ground, and the ore is ground to -74μm, accounting for 85%. The mass concentration of the pulp is adjusted to 28%. The pulp is added to the flotation machine and stirred evenly;

[0086] (2) Sulfidation and activation of copper oxide ore to form copper mineral film

[0087] Hydroxylamine hydrochloride, ammonium sulfide and ammonium sulfate are configured into a vulcanization activator solution with a mass concentration of 20% according to a mass ratio of 1:15:5, and the vulcanization activator is added to the flotation pulp. By weight, the dosage is 600g / t, fully stir the pulp, vulcanize and activate for 4 minutes, and form a copper mineral film;

[0088] (3) Selective collection adjustment of copper mineral thin film

[0089]Add 400g / t of water glass to the pulp in step (2) as a gangue...

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Abstract

The invention discloses a flotation method for copper minerals. The flotation method comprises the following steps: a, grinding and pulping copper minerals to obtain ore pulp; b, adding a vulcanization activating agent into the ore pulp in the step a, and uniformly stirring, wherein the vulcanization activating agent comprises a reducing active agent and a vulcanizing agent according to a mass ratio of 1:10-20; c, adding a flotation reagent into the mixed material obtained in the step b; and d, carrying out foam flotation on the mixed material obtained in the step c, and separating to obtain copper concentrate and flotation tailings. According to the method, the forming process of the sulfide film on the surface of the copper ore can be improved, regulated and controlled, the vulcanizing agent can be reasonably used, and the purpose of efficient flotation and enrichment of the mixed copper ore and the copper oxide ore is achieved.

Description

technical field [0001] The invention belongs to the technical field of ore flotation, and in particular relates to a copper mineral flotation method. Background technique [0002] At present, the sulfidation flotation process is still the main flotation enrichment technology for mixed copper ore and copper oxide ore. The vulcanizing agents used in the vulcanization flotation process of copper-containing oxide minerals mainly include sodium sulfide, sodium hydrosulfide, ammonium sulfide, calcium sulfide and sodium polysulfide, etc. These vulcanizing agents can react with copper ions on the surface of copper oxide minerals to form hydrophobic Sulfide film activates the flotation of copper oxide ore, but when it is used as an activator for copper mineral flotation, if it is not used properly, it will inhibit copper sulfide minerals or sulfided copper oxide minerals. However, mixed copper ore and copper oxide ore are usually mixed with oxygen-sulfur-copper minerals, and it is d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/00B03D1/018B03D101/00B03D103/04
CPCB03D1/00B03D1/018B03D2201/00B03D2203/04
Inventor 康金星王传龙王亚运宋磊于传兵吕东郭素红刘志国王鑫
Owner CHINA ENFI ENGINEERING CORPORATION
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