Activating agent for refractory copper oxide ore and application of activating agent

Abstract

The invention discloses an activating agent for refractory copper oxide ore and application of the activating agent, and belongs to the technical field of beneficiation flotation reagents. The activating agent 2-mercaptopyridine is applied to flotation of the refractory copper oxide ore, a coordination reaction and an oxidation-reduction reaction in ore pulp are carried out at the same time, the copper oxide ore is selectively and rapidly activated, and the flotation rate of the copper oxide ore is further increased. The activating agent 2-mercaptopyridine is suitable for treating refractory copper oxide ore which is high in oxidation rate and serious in argillization, in the flotation process, the flotation effect of copper oxide ore can be greatly improved without adding vulcanizing agents such as sodium sulfide, and the flotation efficiency of copper oxide ore is greatly improved. And the flotation rate of the refractory copper oxide ore can be increased by 20% or above on the premise that it is ensured that the copper flotation recovery rate is higher than 80%, and good industrial application prospects are achieved.

Description

Technical Field

[0001] The invention relates to an activator for refractory copper oxide ore and application thereof, belonging to the technical field of ore dressing and flotation reagents. Background Art

[0002] Copper is an important strategic metal resource. Due to its excellent metallic properties, it is widely used in many fields such as industrial manufacturing and military. China has become the world's largest copper consumer, and demand has been growing steadily. As the speed of industrial development is much higher than the self-sufficiency of copper resources, my country's dependence on foreign copper resources exceeds 70%. With the increasing scarcity of copper sulfide and high-quality copper oxide ore resources, the development of my country's copper resources has gradually turned to difficult-to-select copper oxide resources. Refractory copper oxide ores generally have the characteristics of loose structure, fragility, high content of muddy gangue, complex structure and morphology, and fine embedded particle size. Most copper oxide ores are tightly wrapped and intermixed with gangue minerals. In the flotation process of difficult-to-select copper oxide ores, the selectivity and stability of the activator are often considered to reduce the influence of slime, fine-grained minerals and other non-target minerals on the flotation results.

[0003] The main separation methods of copper oxide minerals include flotation, chemical beneficiation and separation-flotation. Among them, the most widely used industrial method is the sulfide-xanthate flotation method. The sulfide-xanthate flotation method first uses sodium sulfide or other sulfiding agents to sulfide the copper oxide ore, and then uses a large amount of high-grade xanthate and other collectors for flotation. This method has a good effect on copper oxide ores with low mud content such as malachite and azurite. However, when the copper oxide ore has a high mud content or exists in the form of silicates, some of the copper oxide minerals cannot be completely sulfided or the sulfide film formed after sulfidation is unstable, resulting in poor floatability and the need to consume a large amount of flotation reagents. Secondly, while sodium sulfide acts as an activator for copper oxide ores, it can also serve as an inhibitor for sulfided copper oxide ores. Therefore, when using the sulfidation-xanthate flotation process, the amount of sulfiding agent must be strictly controlled to avoid the failure of the sulfiding agent due to deliquescence, oxidation and other reactions, resulting in incomplete sulfidation and blockage of oxidation precipitation, and to prevent excessive sulfiding agent from inhibiting the flotation process and reducing flotation efficiency. In order to solve the above problems, many scholars have conducted extensive research on the flotation process, activation and mechanism of action of oxidized copper ore, synthesized and developed many new activators, and have been widely used in the flotation practice of oxidized copper ore.

[0004] In recent years, researchers have found that some organic chelating agents have strong selectivity for metal ions and can increase the active sites on the surface of minerals, such as salicylhydroxyl oxime, benzotriazole, 8-hydroxyquinoline, dithiothiodiazole, etc. These highly selective organic chelating agents are widely used to activate copper oxide minerals. 2-Mercaptopyridine is an organic heterocyclic ligand with a simple structure and diverse coordination forms. It can form stable complexes with a variety of metal ions such as group IIB metal ions, lead, cobalt, manganese, copper, nickel, etc. These complexes often show unique properties such as thermal stability and catalytic properties. The diverse coordination forms and stable complexes of 2-mercaptopyridine make it an important research object in coordination chemistry. Therefore, the present invention applies it to the flotation research of activated copper oxide ores. Summary of the invention

[0005] The invention is based on the problems that when a sulfide xanthate flotation method is used to treat copper oxide, the flotation efficiency is low, the dosage of a sulfide activator is difficult to control, and the ore is sensitive to the properties. The invention provides a high-efficiency activator 2-mercaptopyridine for copper oxide ores with high flotation efficiency, small dosage of reagents, and relatively stable activation products. The activator is used in the flotation recovery of a difficult-to-select copper oxide ores with high mud and high oxidation rate.

[0006] The invention discloses an application of a high-efficiency activator in the difficult-to-select oxidized copper ore. First, the ore pulp after crushing and grinding is sent to a flotation machine. Then, gangue minerals such as chlorite and talc which are easy to float due to hydrophobicity are removed through a pre-de-sludging operation. Then, sodium fluorosilicate is added to inhibit gangue and disperse the ore mud. Then, 2-mercaptopyridine is added to activate the oxidized copper ore and consume copper ions in the ore pulp. Then, a collector is added to hydrophobically modify the ore pulp. Finally, a frother is added to perform flotation recovery.

[0007] The specific steps are as follows:

[0008] (1) Grinding: Grind 500 g of the raw ore to obtain a pulp with a mass percentage of -0.074 mm particle size of 60% to 70%;

[0009] (2) Pre-de-sliming: The slurry in step (1) is transported to an aerated flotation machine, the mass concentration of the slurry is adjusted to 35%, 30-50 g / t of 2# oil is added to the slurry after slurry adjustment, the reagent stirring time is 3 min, and the flotation time is 4-6 min to obtain de-slimed concentrate and de-slimed tailings;

[0010] (3) Roughing: Sodium fluorosilicate 150-300 g / t, 2-mercaptopyridine 400-600 g / t, amyl xanthate 200-400 g / t, butyl ammonium black powder 60-150 g / t, and 2# oil 10-20 g / t are added to the desludging tailings in sequence, the reagent stirring time is 5 min, and the flotation time is 5-7 min to obtain a primary roughing concentrate and a primary roughing tailings;

[0011] (4) Scavenging: 100-180 g / t of amyl xanthate, 30-90 g / t of butyl ammonium black powder, and 10-20 g / t of 2# oil are sequentially added to the primary roughing tailings of step (3), the reagent stirring time is 4 min, and the flotation time is 4-6 min to obtain a primary scavenging concentrate and a primary scavenging tailings; 50-150 g / t of amyl xanthate, 20-60 g / t of butyl ammonium black powder, and 10-20 g / t of 2# oil are sequentially added to the primary scavenging tailings, the reagent stirring time is 3 min, and the flotation time is 3-5 min to obtain a secondary scavenging concentrate and a secondary scavenging tailings; the secondary scavenging concentrate is returned and incorporated into the primary scavenging operation, and the secondary scavenging tailings are flotation tailings;

[0012] (5) Concentration: 100-180 g / t of amyl xanthate, 30-90 g / t of butyl ammonium black powder and 10-20 g / t of 2# oil are added to the primary roughing concentrate of step (2) in sequence, the reagent stirring time is 4 min, and the flotation time is 4-6 min to obtain a primary concentrated concentrate and a primary concentrated tailings; the primary concentrated tailings are combined with the primary scavenging concentrate and returned to the roughing operation, and 50-120 g / t of amyl xanthate, 30-90 g / t of butyl ammonium black powder and 10-20 g / t of 2# oil are added to the primary concentrated concentrate in sequence, the reagent stirring time is 4 min, and the flotation time is 3-5 min to obtain a secondary concentrated concentrate and a secondary concentrated tailings; the secondary concentrated tailings are returned and incorporated into the primary concentrating operation, and the secondary concentrated concentrate is subjected to a third blank concentrating operation with a flotation time of 2-4 min to obtain a third concentrated concentrate and a third concentrated tailings; the third concentrated tailings are returned and incorporated into the secondary concentrating operation, and the third concentrated concentrate is a copper oxide concentrate.

[0013] The principle of the present invention is as follows:

[0014] (1) Coordination reaction: 2-mercaptopyridine is a simple tautomer and proton transfer compound. Its protonation can exist on the N atom or the S atom, and its existence form depends on the physical state and solvent environment. In the flotation solution system, the thiol -SH of the reagent is dominant, and the sulfur atom in -SH has a larger atomic radius and lower electronegativity than the nitrogen atom in -NH. Therefore, the thiol in 2-mercaptopyridine is more likely to provide lone pair electrons to react with Cu on the mineral surface. 2+ Form coordination bonds to generate stable cyclic compounds adsorbed on the mineral surface. These compounds can serve as the collector's aiming points, enhancing the collector's adsorption effect on the mineral surface.

[0015] (2) Redox reaction: On the basis of coordination, -SH in 2-mercaptopyridine can further react with Cu dissolved in the slurry. 2+Redox reaction occurs, and the highly active Cu2S component produced can be quickly adsorbed on the surface of copper oxide minerals, providing more active sites for the adsorption of collectors; the thiol group is oxidized into a relatively stable disulfide. The formation of disulfide bonds not only enhances the hydrophobicity of the mineral surface, but also strengthens the adsorption of collector molecules on the mineral surface, which can effectively prevent the collector from falling off and redepositing during flotation, thereby improving the flotation recovery rate.

[0016] Beneficial effects of the present invention:

[0017] (1) The activator provided by the present invention is used in the separation of oxidized copper ore, and can reduce the nonspecific adsorption of ore mud on the mineral surface through selective chelation, and provide a large number of active sites for the mineral surface through coordination reaction and redox reaction, so that the collector can form a continuous adsorption layer, which significantly improves the recovery rate and flotation efficiency of the oxidized copper ore.

[0018] (2) The activator provided by the present invention performs slurry adjustment and activation on the ore pulp, and reduces the activation energy required for the adsorption reaction of the collector through the redox reaction. Under the premise of ensuring that the flotation recovery rate is higher than 80%, the flotation rate of the difficult-to-select oxidized copper ore can be increased by more than 20%.

[0019] (3) The activator provided by the present invention has a reinforcing effect on the adsorption of the collector in the actual application of flotation of copper oxide ore, weakens the shedding and redeposition of the collector, and avoids the deterioration of the flotation environment. Its own foaming property also reduces the consumption of the activator, and has good industrial application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a process flow chart of the present invention. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below in conjunction with specific embodiments. The embodiments are only used to specifically illustrate the present invention, but the protection scope of the present invention is not limited to the contents described.

[0022] The activator of the present invention is applied to the roughing operation. In order to more intuitively reflect the effect of the activator of the present invention on efficiently activating the difficult-to-select copper oxide ore, in the following embodiments, the roughing operation in the process flow of the present invention is selected as the conditional experimental process of the activator action time, the flotation time is 7 minutes, and the foam concentrate product is collected every 1 minute for analysis and testing.

[0023] Example 1: A difficult-to-select oxidized copper ore in Yunnan has an oxidation rate of 77.75%, the original ore contains 2.63% copper, free oxidized copper accounts for 49.13%, combined oxidized copper accounts for 28.62%, secondary copper sulfide accounts for 6.42%, and primary copper sulfide accounts for 14.09%; the copper minerals in the original ore mainly include malachite, azurite and chrysocolla, the ore is finely embedded, mostly in star-shaped and unevenly impregnated distribution, and is closely symbiotic with gangue minerals such as mica, quartz, feldspar, chlorite, dolomite, calcite, etc., and the mud content of the ore is about 28.45%.

[0024] The activator of the present invention is applied to the flotation of a difficult-to-select copper oxide ore in Yunnan. The test flow chart of this embodiment is as follows: Figure 1 As shown, the specific steps are as follows:

[0025] (1) Grinding: Grind 500 g of the raw ore to obtain a pulp with a mass percentage of -0.074 mm particle size accounting for 70%;

[0026] (2) Pre-de-sliming: The slurry in step (1) is transported to an aerated flotation machine, the mass concentration of the slurry is adjusted to 35%, 30 g / t of 2# oil is added to the slurry after slurry adjustment, the reagent stirring time is 3 min, and the flotation time is 4 min to obtain de-slimed concentrate and de-slimed tailings;

[0027] (3) Roughing: 150 g / t of sodium fluorosilicate, 400 g / t of 2-mercaptopyridine, 200 g / t of amyl xanthate, 60 g / t of butyl ammonium black powder, and 10 g / t of 2# oil were added to the desludging tailings in sequence. The reagent stirring time was 5 min, and the flotation time was 5 min to obtain a primary roughing concentrate and a primary roughing tailings.

[0028] (4) Scavenging: 100 g / t of amyl xanthate, 30 g / t of butyl ammonium black powder, and 10 g / t of 2# oil were added to the primary roughing tailings of step (2) in sequence, the reagent stirring time was 4 min, and the flotation time was 4 min, to obtain a primary scavenging concentrate and a primary scavenging tailings; 50 g / t of amyl xanthate, 20 g / t of butyl ammonium black powder, and 10 g / t of 2# oil were added to the primary scavenging tailings in sequence, the reagent stirring time was 3 min, and the flotation time was 3 min, to obtain a secondary scavenging concentrate and a secondary scavenging tailings; the secondary scavenging concentrate was returned and incorporated into the primary scavenging operation, and the secondary scavenging tailings were the flotation tailings;

[0029] (5) Concentration: 100 g / t of amyl xanthate, 30 g / t of butyl ammonium black powder and 10 g / t of 2# oil were added to the primary roughing concentrate of step (2) in sequence, the reagent stirring time was 4 min, and the flotation time was 4 min to obtain a primary concentrated concentrate and a primary concentrated tailings; the primary concentrated tailings were combined with the primary scavenging concentrate and returned to the roughing operation, and 50 g / t of amyl xanthate, 30 g / t of butyl ammonium black powder and 10 g / t of 2# oil were added to the primary concentrated concentrate in sequence, the reagent stirring time was 4 min, and the flotation time was 3 min to obtain a secondary concentrated concentrate and a secondary concentrated tailings; the secondary concentrated tailings were returned and incorporated into the primary concentration operation, and the secondary concentrated concentrate was subjected to a third blank concentration operation, and the flotation time was 2 min to obtain a third concentrated concentrate and a third concentrated tailings; the third concentrated tailings were returned and incorporated into the secondary concentration operation, and the third concentrated concentrate was a copper oxide concentrate; the test results of this embodiment are shown in Table 1, and the test results of the conditions of the activator action time of this embodiment are shown in Table 3.

[0030] Comparative Example 1: The refractory copper oxide ore treated in this example is consistent with that in Example 1, and the treatment process is consistent with that in Example 1, except that the activator is sodium sulfide. The test results of this comparative example are shown in Table 2, and the conditional test results of the activator action time of this comparative example are shown in Table 4.

[0031] Example 2: A difficult-to-select oxidized copper ore in Xinjiang has an oxidation rate of 78.04%, the original ore contains 2.87% copper, free oxidized copper accounts for 48.59%, combined oxidized copper accounts for 29.45%, secondary copper sulfide accounts for 8.54%, and primary copper sulfide accounts for 10.60%; the copper minerals in the original ore mainly include malachite, azurite and chrysocolla, the ore is finely embedded, mostly in star-shaped and unevenly impregnated distribution, and is closely associated with gangue minerals such as quartz, chlorite, sericite, serpentine, calcite, talc, etc., and the mud content of the ore is about 32.56%.

[0032] The activator of the present invention is applied to the flotation of a difficult-to-select oxide copper ore in Xinjiang. The test flow chart of this embodiment is as follows: Figure 1 As shown, the specific steps are as follows:

[0033] (1) Grinding: Grind 500 g of the raw ore to obtain a pulp with a mass percentage of -0.074 mm particle size accounting for 65%;

[0034] (2) Pre-de-sliming: The slurry in step (1) is transported to an aerated flotation machine, the mass concentration of the slurry is adjusted to 35%, 40 g / t of 2# oil is added to the slurry after slurry adjustment, the reagent stirring time is 3 min, and the flotation time is 5 min to obtain de-slimed concentrate and de-slimed tailings;

[0035] (3) Roughing: 230 g / t of sodium fluorosilicate, 500 g / t of 2-mercaptopyridine, 300 g / t of amyl xanthate, 100 g / t of butyl ammonium black powder, and 15 g / t of 2# oil were added to the desludging tailings in sequence. The reagent stirring time was 5 min and the flotation time was 6 min to obtain a primary roughing concentrate and a primary roughing tailings.

[0036] (4) Scavenging: 140 g / t of amyl xanthate, 60 g / t of butyl ammonium black powder, and 15 g / t of 2# oil are sequentially added to the primary roughing tailings of step (3), the reagent stirring time is 4 min, and the flotation time is 5 min, to obtain a primary scavenging concentrate and a primary scavenging tailings; 100 g / t of amyl xanthate, 40 g / t of butyl ammonium black powder, and 15 g / t of 2# oil are sequentially added to the primary scavenging tailings, the reagent stirring time is 3 min, and the flotation time is 4 min, to obtain a secondary scavenging concentrate and a secondary scavenging tailings; the secondary scavenging concentrate is returned and incorporated into the primary scavenging operation, and the secondary scavenging tailings are the flotation tailings;

[0037] (5) Concentration: 140 g / t of amyl xanthate, 60 g / t of butyl ammonium black powder and 15 g / t of pine oil were added to the primary roughing concentrate of step (2) in sequence, the reagent stirring time was 4 min, and the flotation time was 5 min to obtain a primary concentrated concentrate and a primary concentrated tailings; the primary concentrated tailings were combined with the primary scavenging concentrate and returned to the roughing operation, and 90 g / t of amyl xanthate, 60 g / t of butyl ammonium black powder and 15 g / t of 2# oil were added to the primary concentrated concentrate in sequence, the reagent stirring time was 4 min, and the flotation time was 4 min to obtain a secondary concentrated concentrate and a secondary concentrated tailings; the secondary concentrated tailings were returned and incorporated into the primary concentration operation, and the secondary concentrated concentrate was subjected to a third blank concentration operation, and the flotation time was 3 min to obtain a third concentrated concentrate and a third concentrated tailings; the third concentrated tailings were returned and incorporated into the secondary concentration operation, and the third concentrated concentrate was a copper oxide concentrate; the test results of this embodiment are shown in Table 1, and the test results of the conditions of the activator action time of this embodiment are shown in Table 3.

[0038] Comparative Example 2: The refractory copper oxide ore treated in this example is consistent with that in Example 2, and the treatment process is consistent with that in Example 2, except that the activator is sodium sulfide. The test results of this comparative example are shown in Table 2, and the conditional test results of the activator action time of this comparative example are shown in Table 4.

[0039] Example 3: A refractory oxidized copper ore in Tibet has an oxidation rate of 81.27%, the original ore contains 3.46% copper, free oxidized copper accounts for 50.13%, combined oxidized copper accounts for 31.14%, secondary copper sulfide accounts for 7.72%, and primary copper sulfide accounts for 11.27%; the copper minerals in the original ore mainly include malachite, azurite and chrysocolla, the ore is finely embedded, mostly in star-shaped and unevenly impregnated distribution, and is closely associated with gangue minerals such as quartz, chlorite, sericite, serpentine, calcite, talc, etc., and the mud content of the ore is about 35.47%.

[0040] The activator of the present invention is applied to the flotation of a difficult-to-select oxide copper ore in Xinjiang. The test flow chart of this embodiment is as follows: Figure 1 As shown, the specific steps are as follows:

[0041] (1) Grinding: Grind 500 g of the raw ore to obtain a pulp with a mass percentage of -0.074 mm particle size accounting for 60%;

[0042] (2) Pre-de-sliming: The slurry in step (1) is transported to an aerated flotation machine, the mass concentration of the slurry is adjusted to 35%, 50 g / t of 2# oil is added to the slurry after slurry adjustment, the reagent stirring time is 3 min, and the flotation time is 6 min to obtain de-slimed concentrate and de-slimed tailings;

[0043] (3) Roughing: 300 g / t of sodium fluorosilicate, 600 g / t of 2-mercaptopyridine, 400 g / t of amyl xanthate, 150 g / t of butyl ammonium black powder, and 20 g / t of 2# oil were added to the desludging tailings in sequence. The reagent stirring time was 5 min and the flotation time was 7 min to obtain a primary roughing concentrate and a primary roughing tailings.

[0044] (4) Scavenging: 180 g / t of amyl xanthate, 90 g / t of butyl ammonium black powder, and 20 g / t of 2# oil were added to the primary roughing tailings of step (3) in sequence, the reagent stirring time was 4 min, and the flotation time was 6 min, to obtain a primary scavenging concentrate and a primary scavenging tailings; 150 g / t of amyl xanthate, 60 g / t of butyl ammonium black powder, and 20 g / t of 2# oil were added to the primary scavenging tailings in sequence, the reagent stirring time was 3 min, and the flotation time was 5 min, to obtain a secondary scavenging concentrate and a secondary scavenging tailings; the secondary scavenging concentrate was returned and incorporated into the primary scavenging operation, and the secondary scavenging tailings were the flotation tailings;

[0045] (5) Concentration: 180 g / t of amyl xanthate, 90 g / t of butyl ammonium black powder and 20 g / t of pine oil were added to the primary roughing concentrate of step (2) in sequence, the reagent stirring time was 4 min, and the flotation time was 6 min to obtain a primary concentrated concentrate and a primary concentrated tailings; the primary concentrated tailings were combined with the primary scavenging concentrate and returned to the roughing operation, and 120 g / t of amyl xanthate, 90 g / t of butyl ammonium black powder and 20 g / t of 2# oil were added to the primary concentrated concentrate in sequence, the reagent stirring time was 4 min, and the flotation time was 5 min to obtain a secondary concentrated concentrate and a secondary concentrated tailings; the secondary concentrated tailings were returned and incorporated into the primary concentration operation, and the secondary concentrated concentrate was subjected to a third blank concentration operation, with a flotation time of 4 min to obtain a third concentrated concentrate and a third concentrated tailings; the third concentrated tailings were returned and incorporated into the secondary concentration operation, and the third concentrated concentrate was a copper oxide concentrate; the test results of this embodiment are shown in Table 1, and the test results of the conditions of the activator action time of the roughing operation of this embodiment are shown in Table 3.

[0046] Comparative Example 2: The refractory copper oxide ore treated in this example is consistent with that in Example 2, and the treatment process is consistent with that in Example 2, except that the activator is sodium sulfide. The test results of this comparative example are shown in Table 2, and the conditional test results of the activator action time of this comparative example are shown in Table 4.

[0047] Table 1 Example flotation test results

[0048]

[0049]

[0050] Table 2 Comparative Example Flotation Test Results

[0051]

[0052] From the data in Table 2 and the data in Table 1, it can be seen that in the flotation process of difficult-to-select oxidized copper ore, Table 1 uses 2-mercaptopyridine as an activator, the grade of oxidized copper concentrate is above 20%, and the recovery rate is above 80%. Its flotation index is compared with the flotation process in Table 2 using sodium sulfide as an activator. The recovery rate is increased by about 20%, and the grade is increased by 7 to 8 percentage points, achieving effective recovery of high oxidation rate, high mud difficult-to-select oxidized copper ore.

[0053] Table 3 Conditional test results of the activator action time of the embodiment

[0054]

[0055]

[0056] Table 4 Comparative Example Activator Action Time Condition Experimental Results

[0057]

[0058]

[0059] From the data in Table 3, it can be seen that when 2-mercaptopyridine is applied to the roughing operation of high oxidation rate, high mud and difficult to select oxidized copper ore, the cumulative Cu recovery rate of copper concentrate can reach more than 60% when the flotation time is 5 minutes; from the data in Table 4, it can be seen that when sodium sulfide is used as an activator, the Cu cumulative recovery rate of copper concentrate can reach about 60% when the flotation time is 7 minutes. By comparing the experimental data in Table 3 and Table 4, it can be seen that within the flotation time range of 5 to 7 minutes, 2-mercaptopyridine has a high selectivity and can significantly improve the flotation rate of oxidized copper minerals, and increase the floating rate of oxidized copper ore by more than 20% when the content of mud minerals is high.

[0060] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. All modifications of various equivalent forms based on the technical essence of the present invention made by those skilled in the art shall fall within the scope defined by the claims attached to this application.

Claims

1. An activator for refractory copper oxide ore, characterized in that: The activator is 2-mercaptopyridine.

2. The use of the activator for refractory copper oxide ore according to claim 1, characterized in that: The specific steps are as follows: (1) Crushing and grinding: After crushing the raw ore, a pulp with a mass percentage of -0.074 mm particle size of 60% to 70% is obtained; (2) Pre-de-sliming: The slurry in step (1) is transported to an aerated flotation machine, the mass concentration of the slurry is adjusted to 35%, 30-50 g / t of 2# oil is added to the slurry after slurry adjustment, the reagent stirring time is 3 min, and the flotation time is 4-6 min to obtain de-slimed concentrate and de-slimed tailings; (3) Roughing: Sodium fluorosilicate 150-300 g / t, 2-mercaptopyridine 400-600 g / t, amyl xanthate 200-400 g / t, butyl ammonium black powder 60-150 g / t, and 2# oil 10-20 g / t are added to the desludging tailings in sequence, the reagent stirring time is 5 min, and the flotation time is 5-7 min to obtain a primary roughing concentrate and a primary roughing tailings; (4) Scavenging: 100-180 g / t of amyl xanthate, 30-90 g / t of butyl ammonium black powder, and 10-20 g / t of 2# oil are sequentially added to the primary roughing tailings of step (3), the reagent stirring time is 4 min, and the flotation time is 4-6 min to obtain a primary scavenging concentrate and a primary scavenging tailings; 50-150 g / t of amyl xanthate, 20-60 g / t of butyl ammonium black powder, and 10-20 g / t of 2# oil are sequentially added to the primary scavenging tailings, the reagent stirring time is 3 min, and the flotation time is 3-5 min to obtain a secondary scavenging concentrate and a secondary scavenging tailings; the secondary scavenging concentrate is returned and incorporated into the primary scavenging operation, and the secondary scavenging tailings are flotation tailings; (5) Concentration: 100-180 g / t of amyl xanthate, 30-90 g / t of butyl ammonium black powder and 10-20 g / t of 2# oil are added to the primary roughing concentrate of step (2) in sequence, the reagent stirring time is 4 min, and the flotation time is 4-6 min to obtain a primary concentrated concentrate and a primary concentrated tailings; the primary concentrated tailings are combined with the primary scavenging concentrate and returned to the roughing operation, and 50-120 g / t of amyl xanthate, 30-90 g / t of butyl ammonium black powder and 10-20 g / t of 2# oil are added to the primary concentrated concentrate in sequence, the reagent stirring time is 4 min, and the flotation time is 3-5 min to obtain a secondary concentrated concentrate and a secondary concentrated tailings; the secondary concentrated tailings are returned and incorporated into the primary concentrating operation, and the secondary concentrated concentrate is subjected to a third blank concentrating operation with a flotation time of 2-4 min to obtain a third concentrated concentrate and a third concentrated tailings; the third concentrated tailings are returned and incorporated into the secondary concentrating operation, and the third concentrated concentrate is a copper oxide concentrate.

3. The use of an activator for refractory copper oxide ore according to claim 2, characterized in that: The oxidation rate of the refractory oxidized copper ore is above 77%. The copper minerals in the ore are mainly malachite, azurite and chrysocolla. The ore is finely embedded, mostly in star-shaped and unevenly impregnated distribution, closely coexists with a variety of gangue minerals, and contains more than 28% mud.

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