Copper-sulfur separation inhibitor, lime-free copper-sulfur flotation separation method and application thereof

A copper-sulfur separation and separation method technology, applied in flotation, solid separation and other directions, can solve the problems of difficult filtration of concentrates, high environmental protection pressure, large fluctuations in addition amount, etc., to overcome the low grade of copper concentrates and ensure the quality and recovery rate, the effect of strong inhibition ability

Pending Publication Date: 2021-04-06
BEIJING MINING & METALLURGICAL TECH GRP CO LTD +1
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AI-Extracted Technical Summary

Problems solved by technology

However, there are major disadvantages in the use of lime. First, lime needs to be prepared into lime milk before it can be used. The workload is large and there are potential safety hazards in strong alkalinity. Second, it is easy to scale during use, block pipes, and the amount of addition fluctuates greatly, which leads to industrial production. The index fluctuates greatly; the third is that after adding a large amount of lime, the flotation foam becomes sticky, the pipeline transportation is difficult, and the concentrate filtration is difficult; the fourth is that after the lime is used, the tailings have high alkalinity, and the pH is even greater than 10, which cannot be discharged outside, and the environmental...
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Abstract

The invention provides a copper-sulfur separation inhibitor, a lime-free copper-sulfur flotation separation method and an application thereof, and relates to the technical field of mineral treatment. The copper-sulfur separation inhibitor comprises sodium carbonate, ammonium sulfate, calcium chloride and sodium hydroxide raw materials, the copper-sulfur separation inhibitor prepared from the raw materials according to a specific dosage ratio has the characteristics of strong inhibition capability, good selectivity and the like, and a good inhibition effect can be achieved by using a small dosage in the copper-sulfur beneficiation process; the copper-sulfur separation inhibitor can replace a traditional lime inhibitor, environment-friendly and efficient recovery of copper-sulfur resources is achieved under the lime-free condition, and the defects that due to the fact that lime is adopted as the inhibitor, foam becomes sticky, the grade of copper concentrate is not high, pipelines and equipment are calcified and corroded, the pH value of tailing water is high, and the environment is polluted are overcome. The invention further provides the lime-free copper-sulfur flotation separation method. In the flotation process of the copper-sulfur raw ore, the specific copper-sulfur separation inhibitor and a collecting agent are adopted, so that efficient separation of copper and sulfur is achieved.

Application Domain

Flotation

Technology Topic

Sodium acid carbonateAmmonium sulfate +7

Image

  • Copper-sulfur separation inhibitor, lime-free copper-sulfur flotation separation method and application thereof
  • Copper-sulfur separation inhibitor, lime-free copper-sulfur flotation separation method and application thereof
  • Copper-sulfur separation inhibitor, lime-free copper-sulfur flotation separation method and application thereof

Examples

  • Experimental program(18)
  • Comparison scheme(16)

Example Embodiment

[0055]As a preferred embodiment of the present invention, the copper sulfur primary mine is grinded to prepare a slurry.
[0056]Since the copper sulfur mine is mostly a block or granular shape, it is not conducive to the subsequent flotation process, so it needs to be polished.
[0057]As a preferred embodiment of the present invention, in step (a), copper sulfur mine is ground to fineness -0.074 mm accounted for 50-85%.
[0058]As a preferred embodiment of the present invention, in step (a), the mass concentration of the slurry is 30-45%.
[0059]The mass concentration of the slurry is too low, and it is easy to cause large drug consumption and affect the recovery of copper concentrate; the mass concentration of the slurry is too high, it is easy to cause inclusion, affecting concentrate position. Therefore, the mass concentration of the slurry needs to be controlled within a particular range. Typical but non-limiting minerals have a mass concentration of 30%, 32%, 34%, 35%, 38%, 40%, 42%, 44% or 45%.
[0060]As a preferred embodiment of the present invention, the amount of inhibitor is from 80 to 500 g / t during the coarse selection of the inhibitor.
[0061]The amount of inhibitor added has a certain effect on the separation effect. When the amount of the inhibitor is too low (less than 80 g / t), it is easy to cause sulfur to suppress, with the copper float, affect the copper concentrate, when inhibition When the amount of the agent is too (higher than 500 g / t), it is easy to cause partial copper to be suppressed, affecting the recovery of copper concentrates, so the amount of inhibitor needs to be controlled within a particular value range. The inhibitor is typically used in step (a), but non-limiting amount is 80 g / t, 100 g / t, 1200 g / t, 150 g / t, 1800 g / t, 200 g / t, 220 g / t, 250 g / t, 280 g / t 300g / t, 320 g / t, 350 g / t, 380 g / t, 400 g / t, 420 g / t, 450 g / t, 480 g / t or 500 g / t.
[0062]As a preferred embodiment of the present invention, the mass ratio of ethiramine, isobuta, diesel, diesel and fatty alcohol polyoxyethyl ether is (2.5): (2.5) :( 2.5-5) :( 2.5-5) :( -5): (1-1.8): 1, preferably 4: 4: 1: 1.
[0063]As a preferred embodiment of the present invention, the mass calculation of the copper sulfur mine is calculated according to the capture agent, and the amount of charge in the step (a) is from 10 to 60 g / t.
[0064]Step (a) The type of capture agent is typical but non-limiting of 10 g / t, 20 g / t, 30 g / t, 40 g / t, 50 g / t or 60 g / t during the crude selection process.
[0065]As a preferred embodiment of the present invention, in step (a), the foaming agent includes any one or at least two combinations of pine alcohol oil, isobutanol or methyl isobutyl methanol, preferably pine alcohol. oil.
[0066]As a preferred embodiment of the present invention, according to the mass calculation of the copper sulfur ore, the bubble agent in the step (a) is 5-20 g / t in the step (a).
[0067]Step (a) The foaming agent is typical but non-limiting amount of 5 g / t, 8 g / t, 18 g / t, 12 g / t, 18 g / t, 12 g / t, 18 g / t, or 20 g / t, 18 g / t, 12 g / t, 15 g / t, 18 g / t, 12 g / t, and.
[0068]By limiting the amount of the inhibitor, the catching agent, and the foaming agent, the sulfur in the copper sulfur mine is selectively inhibited, and does not affect the upper float of copper, thereby achieving high-efficiency copper sulfur separation.
[0069]As a preferred embodiment of the present invention, in step (a), at least one coarse selection is performed. Copper coarse concentrate obtained after coarse selection is a foam product.
[0070]It should be noted that the amount of inhibitors, cavities, and foaming agents during the coarse selection process is the total amount of each agent added, for example, two coarse sections, and the total amount of joining in the two coarse sections is 10-60g / t.
[0071]As a preferred embodiment of the present invention, the coarse selection tail obtained in step (a) is subjected to at least two cleaning. The coarse tailings is used for multiple selection, so that the flotation time of copper is sufficiently long, increase the upper probability of copper, thereby increasing the recovery of copper.
[0072]The medium deposits obtained by multiple sweep can be selected to return to the previous job.
[0073]As a preferred embodiment of the present invention, the coarse selection obtained in the step (a) is subjected to twice (i.e., scans I and scans II).
[0074]Preferably, the capture agent is added during the scanning process, and the amount of the charge of the copper sulfur mine is added, and the amount of the capture agent in I and the cleaning II is independently independently of 3-15 g / t.
[0075]That is, the amount of the capture agent is typically renewed in the I process is 3 g / t, 5 g / t, 8 g / t, 10 g / t, 13 g / t, or 15 g / t. Typical but non-limiting dosage of 3 g / t, 5 g / t, 8 g / t, 10 g / t, 13 g / t, or 15 g / t during the cutting II.
[0076]Preferably, the catching agent added during the scans include ethioxamine, isobutane, diesel, diesel and fatty alcohol polyoxyethylene ether, ethioxamine, isobutane, diesel and fatty alcohol polyoxification. The mass ratio of vinyl ether is (2-6): (2-6): (1-2): 1.
[0077]As a preferred embodiment of the present invention, in step (b), the amount of inhibitor is 10-60 g / t according to the mass calculation of the copper sulfur mine.
[0078]Step (b) The inhibitor is typically used in the selection process of 10 g / t, 20 g / t, 30 g / t, 40 g / t, 50 g / t, and 60 g / t.
[0079]By defining the amount of inhibitor dosage during the selection, sulfur can be better inhibited, and copper can be floated, and the effect of copper sulfur separation is ensured.
[0080]As a preferred embodiment of the present invention, in step (b), the copper coarse selection concentrate is selected at least three, for example, 4 times, 5 times, 6 or 7 times, etc., should be specifically based on the actual situation. select. In general, the middle mine obtained after the selection will return to the previous job, such as the selected medium mine returns the selected operation.
[0081]Preferably, in step (b), the copper coarse selection is performed three selection (ie, selected I, select II and selected III). According to the mass calculation of the copper sulfur mine, the amount of inhibitor in the II is 5-30 g / t, and the amount of inhibitor in the selection II is 4-20 g / t, and the amount of inhibitor in the selection III is 1-10 g / t.
[0082]A typical but non-limiting amount of inhibitors is selected from 5 g / t, 10 g / t, 15 g / t, 20 g / t, 25 g / t, or 30 g / t. The selection II inhibitor is typically, but non-limiting amounts are 4 g / t, 6 g / t, 8 g / t, 11 g / t, 14 g / t, 17 g / t, or 20 g / t. The presented III inhibitors typically but non-limiting amounts of 1 g / t, 3 g / t, 5 g / t, 7 g / t, 8 g / t, and 10 g / t.
[0083]It will also be noted that the amount of inhibitor is 10-60 g / t during the selection process 10-60 g / t, for example, three selected, and the total amount of inhibitor is 10-60 g / t during the three selection.
[0084]According to a third aspect of the invention, the application of the above copper sulfur separation inhibitor or no lime condition copper sulfur flotation separation method is also provided.
[0085]In view of the above copper sulfur separation inhibitor or no lime-free conditional copper sulfur flotation separation method, it has a good application in the field of mineral processing treatment.
[0086]The present invention will be further described below in conjunction with specific embodiments and comparative examples.

Example Embodiment

[0087]Example 1
[0088]This embodiment provides a copper sulfur separation inhibitor, including the following raw materials: sodium carbonate, ammonium sulfate, calcium hydroxide, and sodium hydroxide, and no lime;
[0089]Among them, sodium carbonate, ammonium sulfate, calcium hydroxide and sodium hydroxide is 2: 2: 2: 1.

Example Embodiment

[0090]Example 2
[0091]This embodiment provides a copper sulfur separation inhibitor, including the following raw materials: sodium carbonate, ammonium sulfate, calcium hydroxide, and sodium hydroxide, and no lime;
[0092]Among them, sodium carbonate, ammonium sulfate, calcium chloride and sodium hydroxide is 1: 1: 1: 1.
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