A method of activation of a chrysocolla mineral and a method of flotation of a high-alkaline copper oxide ore or a copper cobalt oxide ore

Abstract

The application discloses a method for activating chrysotile and a method for floating high-alkaline copper oxide ore or copper cobalt oxide ore, and belongs to the technical field of ore dressing. The method for activating chrysotile is used to solve the problem that chrysotile is difficult to be recovered by flotation due to its strong hydrophilicity by converting the crystal phase and reconstructing the site on the surface of chrysotile to activate the surface of chrysotile and enhance the flotation separation effect. The method for activating chrysotile can also be used for the flotation of complex high-alkaline copper (or copper cobalt) oxide ore. The high-alkaline copper (or copper cobalt) oxide ore is treated by the process of positive and reverse combined flotation, so that the recovery rate of copper and cobalt in the high-alkaline copper (or copper cobalt) oxide ore is greater than 90%, and the removal rate of calcium and magnesium is greater than 70%. Compared with the existing flotation process of copper (copper cobalt) oxide ore, the method has the advantages of simple process, strong adaptability, low toxicity, low cost, high economic benefit and easy industrial popularization and application.

Description

Technical Field

[0001] This invention relates to a method for activating chrysocolla minerals and a flotation method for highly alkaline copper oxide (or copper-cobalt) ore, belonging to the field of mineral processing technology. Background Technology

[0002] Copper and cobalt are important strategic mineral resources, serving as essential raw materials for national economic and social development, and are widely used in defense, power, communications, construction, transportation, and other fields. With rapid economic development, my country has become the world's largest consumer of copper and cobalt, and its demand for these minerals is increasing daily. Currently, with the exploitation of these resources, sulfide copper ores and easily beneficiated copper-cobalt oxide ores are decreasing, while complex and difficult-to-benefit copper-cobalt oxide ores are increasingly being exploited. Due to their high oxidation rate, high content of alkaline calcium-magnesium gangue minerals, and complex structure, these ores are difficult to separate and enrich using traditional flotation techniques. Furthermore, their high cost and significant pollution make direct wet leaching unsuitable. Therefore, researching and developing new flotation technologies and processes for handling complex and highly alkaline copper-cobalt oxide ores is particularly urgent and of great significance for the efficient utilization of strategic mineral resources.

[0003] In the case of complex, highly alkaline copper oxide or copper-cobalt oxide ores, Chinese patent (publication number: CN119034949A) discloses the application and flotation method of ammonium fluoride as an activator and alkylamide as a collector in the flotation of copper oxide ores. Specifically, it discloses the use of ammonium fluoride to directionally activate malachite, and the use of hexylamide to generate a bidentate chelate collector with copper ions, thereby improving the grade and recovery rate of malachite. However, this method requires sophisticated equipment and has high toxicity. Chinese patent (publication number: CN113909154B) discloses a beneficiation method for copper oxide ores containing malachite and malachite. This method, based on the difference between the characteristic colors of malachite and malachite and the gangue colors, uses a process of "raw ore crushing - ultrasonic washing - classification - color sorting roughing - color sorting cleaning - color sorting" to beneficiate the ore. This method can obtain high-grade color sorted concentrate and tailings, but its production cost is high, making it difficult to apply on an industrial scale. Chinese Patent (Publication No.: CN118186209A) discloses a combined leaching method for copper-cobalt oxide ores with high acid consumption and easy bubbling. This method involves pre-leaching with concentrated sulfuric acid and high-copper raffinate, followed by leaching with concentrated sulfuric acid, but this method is costly. Chinese Patent (Publication No.: CN109201312A) discloses a beneficiation method for copper-cobalt oxide ores containing easily floatable gangue. This method introduces easily floatable gangue collectors and inhibitors to separate gangue minerals from valuable minerals, but the process flow is complex. Chinese Patent (Publication No.: CN118807990A) discloses a flotation method for high-calcium-magnesium copper-cobalt oxide ores. This method introduces a combination of xanthate and salicylhydroxyxamic acid collectors, achieving good performance indicators, but the reagent cost is high, and the separation of valuable minerals from gangue minerals is limited. Summary of the Invention

[0004] In order to solve the problems of existing technologies such as difficulty in flotation of chrysocolla in complex high-alkalinity copper oxide (or copper-cobalt) ores, low copper-cobalt recovery rate, high production cost and high leaching acid consumption.

[0005] The first objective of this invention is to provide a method for activating chrysocolla mineral. This method involves introducing an activator to transform the crystal phase and reconstruct the sites on the surface of chrysocolla, thereby exposing more copper active sites on the surface of chrysocolla and enhancing the adsorption of the collector on the surface of chrysocolla. This achieves effective flotation of chrysocolla in a green, low-dosage, and low-cost manner.

[0006] The second objective of this invention is to provide a flotation method for highly alkaline copper oxide ore or copper-cobalt oxide ore. This method employs a "combined forward and reverse flotation" process to treat highly alkaline copper oxide (or copper-cobalt) ore, achieving a copper and cobalt recovery rate of over 90% and a calcium and magnesium removal rate of over 70% in the highly alkaline copper oxide (or copper-cobalt) ore.

[0007] To achieve the above-mentioned technical objectives, the present invention provides a method for activating chrysocolla mineral. The method involves grinding and adjusting the raw chrysocolla ore to obtain a slurry, adding water-soluble copper salt and water-soluble carbonate to the slurry for activation, and then proceeding to the flotation process.

[0008] The key to this invention lies in utilizing water-soluble copper salts and water-soluble carbonates to induce phase transformation and site reconstruction on the surface of chrysocolla, thereby exposing more copper active sites and improving its flotation performance. Because chrysocolla has a highly hydrophilic surface with very few exposed copper active sites, collector adsorption can only occur within the pores of the chrysocolla surface, and the adsorption is extremely weak, leading to difficult flotation and high reagent consumption. The technical solution of this invention is based on the principle of geochemical mineralization. From the perspective of mineral crystal structure and physicochemical properties, it introduces water-soluble copper salt and water-soluble carbonate to provide copper ions and carbonate ions, respectively. In the flotation solution, copper carbonate precipitate is generated and adheres to the surface of chrysocolla. Cu²⁺ ions have a strong coordination ability and react with hydroxyl compounds on the surface of chrysocolla to produce a more stable basic copper carbonate complex. This causes chrysocolla to undergo a crystal phase transformation similar to malachite, exposing more copper active sites on the surface. This allows the collector to be firmly adsorbed on the surface of chrysocolla, enhancing the hydrophobicity of the chrysocolla surface, thereby achieving efficient flotation of chrysocolla.

[0009] As a preferred embodiment, the concentration of the slurry is 30-60 mg / L.

[0010] As a preferred embodiment, the amount of water-soluble copper salt added is 10~50 mg / L. The water-soluble copper salt primarily provides Cu²⁺; theoretically, any compound capable of ionizing Cu²⁺ in water meets the requirements. As a more preferred embodiment, the water-soluble copper salt includes at least one of anhydrous copper sulfate, copper sulfate pentahydrate, and copper nitrate. The concentration of the water-soluble copper salt needs to be controlled within an appropriate range. If the concentration is too low, it will be difficult to effectively activate the malachite mineral; if the concentration is too high, the reagent consumption cost will be high, and excessive dosage will lead to a decrease in the coordination stability between malachite and copper ions, resulting in a reduction in the adsorption performance of the collector.

[0011] As a preferred embodiment, the amount of water-soluble carbonate added is 10-50 mg / L. Water-soluble carbonate primarily provides carbonate ions; theoretically, any compound capable of ionizing into carbonate ions in water meets this requirement. As a more preferred embodiment, the water-soluble carbonate includes at least one of sodium carbonate and sodium bicarbonate. The concentration of the water-soluble carbonate is preferably matched to the concentration of the water-soluble copper salt.

[0012] The present invention also provides a flotation method for highly alkaline copper oxide ore or copper-cobalt oxide ore, comprising the following steps:

[0013] 1) The raw ore of high-alkalinity oxidized copper or high-alkalinity oxidized copper-cobalt ore is crushed, ground, and prepared into a slurry;

[0014] 2) Add flotation reagents, including sulfiding agents and xanthate collectors, to the slurry to perform flotation I of malachite or malachite-cobalt oxide ore to obtain froth concentrate I and tailings I;

[0015] 3) The tailings I are activated by water-soluble copper salt and water-soluble carbonate, and then flotation reagents including sulfiding agents and xanthate collectors are added to carry out chrysocolla flotation II to obtain froth concentrate II and tailings II.

[0016] 4) Add flotation reagents, including fatty acid collectors, to the tailings II to carry out dealkalization of calcium-magnesium gangue minerals III to obtain bottom concentrate III;

[0017] 5) Combine foam concentrate I, foam concentrate II and bottom flow concentrate III to obtain copper oxide concentrate or copper-cobalt oxide concentrate.

[0018] This invention addresses the high-alkalinity copper oxide (or copper-cobalt) ore, which has a high grade of alkaline calcium and magnesium and a strong surface hydrophilicity. However, existing positive flotation processes result in low copper (or copper-cobalt) recovery rates, high acid consumption during direct leaching, and high production costs. This invention proposes a "combined forward and reverse flotation" process. First, copper-cobalt minerals are flotated to recover valuable minerals, mainly malachite and cobalt. The tailings mainly contain hydrophilic malachite. Water-soluble copper salts and carbonates are used to transform the crystal phase and reconstruct the sites on the surface of malachite, exposing more copper active sites. This fully activates the malachite, allowing it to be efficiently separated by flotation using a common "sulfide-xanthate" reagent system, solving the technical problem of difficult malachite flotation. The flotation tailings are then used for reverse flotation to separate alkaline gangue minerals. This effectively solves the problem of copper-cobalt resource loss in existing forward flotation technology and achieves efficient separation of alkaline gangue minerals such as calcium and magnesium, significantly reducing acid consumption in subsequent leaching operations.

[0019] As a preferred embodiment, the calcium and magnesium grades in the high-alkalinity copper oxide ore or high-alkalinity copper oxide cobalt ore are both greater than 8%. The copper oxide cobalt ore involved in this invention has high calcium and magnesium grades and high content of alkaline gangue minerals.

[0020] As a preferred embodiment, the grinding process ensures that the mass percentage of particles with a particle size of -0.074 mm is 50% to 80%. Grinding to an appropriate particle size facilitates the complete dissociation of minerals.

[0021] As a preferred embodiment, the slurry preparation is performed to achieve a slurry concentration of 20-40 wt%.

[0022] As a preferred embodiment, flotation I comprises two roughing processes: the first roughing process uses a reagent regime of 600-800 g / t of sulfiding agent, 500-800 g / t of xanthate collector, and 20-50 g / t of frother; the second roughing process uses a reagent regime of 100-200 g / t of sulfiding agent and 300-400 g / t of xanthate collector. Flotation I primarily recovers malachite and cobalt oxide minerals, employing a conventional sulfidation-xanthate reagent regime.

[0023] As a preferred embodiment, Flotation II comprises two roughing processes: the first roughing process uses a reagent regimen of 50-80 g / t water-soluble copper salt, 50-80 g / t water-soluble carbonate, 30-50 g / t sulfiding agent, and 100-200 g / t xanthate collector; the second roughing process uses a reagent regimen of 40-80 g / t xanthate collector. Flotation II introduces an activator to induce phase transformation and site reconstruction on the surface of malachite, exposing more copper active sites. This fully activates the malachite and enhances the adsorption of the collector on the malachite surface, allowing for the flotation separation of malachite using the existing conventional sulfidation-xanthate reagent regimen.

[0024] It should be noted that the current industrial processing method for copper oxide (or copper-cobalt) ore is often a combined beneficiation and smelting process, that is, beneficiation followed by wet leaching. Since the flotation concentrate is to enter the wet leaching operation, the grade requirement of the flotation concentrate is not very high. The main considerations are acid consumption and production costs. Therefore, there is no need to add a beneficiation operation to the flotation process.

[0025] As a preferred embodiment, the vulcanizing agent includes at least one of sodium sulfide and sodium hydrosulfide. Sodium sulfide is a more preferred vulcanizing agent.

[0026] As a preferred embodiment, the xanthate collector includes at least one selected from propyl xanthate, butyl xanthate, and pentyl xanthate. A further preferred xanthate collector is pentyl xanthate.

[0027] As a preferred embodiment, the foaming agent comprises No. 2 oil.

[0028] As a preferred embodiment, the water-soluble copper salt includes at least one of anhydrous copper sulfate, copper sulfate pentahydrate, and copper nitrate.

[0029] As a preferred embodiment, the water-soluble carbonate includes at least one of sodium carbonate and sodium bicarbonate.

[0030] As a preferred embodiment, flotation III includes a primary roughing stage; the reagent formulation for the roughing stage is: 500-800 g / t of fatty acid collector. The fatty acid collector may be, for example, oleic acid or oleic acid derivatives.

[0031] The copper oxide concentrate or copper-cobalt oxide concentrate of the present invention is subjected to wet leaching.

[0032] Compared with the prior art, the beneficial technical effects of the technical solution of the present invention are as follows:

[0033] (1) This invention employs a "phase transformation and site reconstruction" method to activate flotation malachite. By introducing water-soluble copper salts (such as copper sulfate) and water-soluble carbonates (such as sodium carbonate), the active sites on the surface of malachite are directionally regulated, exposing more copper active sites, enhancing the hydrophobicity of the malachite surface, and strengthening the adsorption of the collector on the malachite surface, thereby achieving effective flotation separation of malachite. Compared with existing conventional malachite flotation separation methods, this method has the advantages of low dosage, low cost, low toxicity, and good flotation effect. It is also highly adaptable, requires no changes to the flotation process, and is easy to promote and apply in industry.

[0034] (2) This invention provides a “positive and negative combined flotation” method applicable to complex high-alkalinity copper oxide (or copper-cobalt) ores. First, malachite and cobalt-containing minerals that are easy to float are floated by positive flotation. Then, the flotation of siliceous malachite is enhanced by “crystal phase transformation and site reconstruction” method. Finally, alkaline calcium-magnesium gangue minerals are removed by reverse flotation. Compared with the existing positive flotation process for copper oxide cobalt ores, this process can solve the problem of tailings in positive flotation of copper-cobalt resources. The copper and cobalt recovery rates are increased by 10% or more. It also enables efficient separation of calcium-magnesium gangue minerals from useful minerals and has a simple process.

[0035] (3) The flotation technology and method provided by the present invention can not only achieve effective flotation recovery of malachite, but also significantly reduce acid consumption and cost in the wet leaching process, solving the problems of difficult separation of malachite, high acid consumption, low leaching rate and high production cost in the existing process. Attached Figure Description

[0036] Figure 1 This is a flotation flowchart of Embodiment 1 of the present invention.

[0037] Figure 2 The images show the XRD patterns of the raw malachite ore and flotation concentrate from Example 1 of this invention.

[0038] Figure 3 This is a comparison chart of flotation results in Embodiment 1 of the present invention.

[0039] Figure 4 This is a comparison chart of the flotation results in Embodiment 2 of the present invention.

[0040] Figure 5 This is a flowchart of the actual flotation process for complex, highly alkaline copper (cobalt) oxide ore according to the present invention. Detailed Implementation

[0041] The following specific embodiments are intended to further illustrate the content of this invention, rather than to limit the scope of protection of the claims. Unless otherwise specified, all pharmaceutical agents used are commercially available conventional products.

[0042] Example 1

[0043] The test sample was pure chrysocolla mineral, which was crushed, ceramic ball-milled, and sieved to obtain powder samples with a particle size of 37-74 µm. Elemental analysis was performed using XRF, and the results are shown in Table 1. The results indicate that its purity meets the requirements for pure chrysocolla mineral. 2 g of chrysocolla sample was weighed and added to 40 mL of deionized water for flotation. The flotation process is as follows: Figure 1 As shown. ① Copper sulfate pentahydrate 40 mg / L, sodium carbonate 40 mg / L, and sodium oleate collector 60 mg / L were added sequentially. The frothing time was 3 min. The flotation concentrate and tailings were dried and weighed, and the recovery rate was calculated. Phase analysis was performed on the chrysocolla ore and flotation concentrate. The results are shown below. Figure 2 As shown, the results indicate that malachite phase was detected in the flotation concentrate, suggesting that siliceous malachite has been transformed into easily beneficiated malachite by the precursor reagent phase; ② No calcium sulfate pentahydrate or sodium carbonate activator was added, only sodium oleate collector 60 mg / L was added. The experimental results are as follows... Figure 3 As shown, the results indicate that the recovery rate of the reagent with the precursor is 85.32%, while the recovery rate of malachite without the addition of calcium sulfate pentahydrate and sodium carbonate activator is only 1.45%.

[0044]

[0045] Example 2

[0046] The test sample was pure malachite mineral, which was crushed, ball-milled in a ceramic mill, and sieved to obtain a powder sample with a particle size of 37–74 µm. 2 g of the malachite sample was weighed and added to 40 mL of deionized water for flotation. The flotation process was as follows: Figure 1 As shown in the diagram. ① Copper sulfate pentahydrate 30 mg / L, sodium carbonate 30 mg / L, and sodium oleate collector 80 mg / L were added sequentially. The frothing time was 3 min. The flotation concentrate and tailings were dried, weighed, and the recovery rate was calculated. ② Copper sulfate pentahydrate 30 mg / L and sodium oleate collector 80 mg / L were added sequentially. The frothing time was 3 min. The flotation concentrate and tailings were dried, weighed, and the recovery rate was calculated. ③ Sodium carbonate 30 mg / L and sodium oleate collector 80 mg / L were added sequentially. The frothing time was 3 min. The flotation concentrate and tailings were dried, weighed, and the recovery rate was calculated. ④ Only sodium oleate collector 80 mg / L was added. The experimental results are as follows. Figure 4 As shown in the figure. The results indicate that malachite can only be effectively floated under condition ①.

[0047] Example 3

[0048] Compared to Example 1, the only difference is that the collector, sodium oleate, is replaced with a "sodium hydrosulfide-pentyl xanthate-2# oil" reagent system, i.e., sodium hydrosulfide dosage is 80 mg / L, pentyl xanthate dosage is 80 mg / L, and 2# oil dosage is 5 mg / L. All other conditions and parameters are the same as in Example 1. Experimental results show a recovery rate of 86.15%, indicating that introducing an activator into the "sulfide-xanthate" system can also induce a phase transformation in chrysocolla, achieving effective flotation of chrysocolla.

[0049] Example 4

[0050] For a complex and difficult-to-process high-alkaline oxidized copper ore in Yunnan Province, with copper grade of 1.26%, calcium grade of 9.28%, and magnesium grade of 8.33%, its main components are malachite and chrysocolla. The gangue minerals are mainly quartz, dolomite, and calcite, with an oxidation rate greater than 90%, of which chrysocolla content is approximately 40%. The flotation test procedure is as follows: Figure 5 As shown, the specific flotation experiment steps are as follows:

[0051] (1) Grinding and slurry preparation: Grind the crushed copper oxide ore to a fineness of -0.074 mm, accounting for 65%, and then add water to adjust the slurry concentration to 30wt%.

[0052] (2) Direct flotation operation: ① Sulfide flotation of malachite: In the first roughing operation, 600 g / t of sulfide agent NaHS, 800 g / t of collector pentyl xanthate, and 20 g / t of No. 2 oil are added in sequence, and flotation is carried out for 5 min; In the second roughing operation, 200 g / t of sulfide agent NaHS and 400 g / t of collector pentyl xanthate are added in sequence, and flotation is carried out for 5 min; ② Activated flotation of silica malachite: In the third roughing operation, 60 g / t of copper sulfate, 60 g / t of sodium carbonate, 50 g / t of sulfide agent NaHS, and 100 g / t of collector pentyl xanthate are added in sequence, and flotation is carried out for 5 min; In the fourth roughing operation, 50 g / t of collector pentyl xanthate is added, and flotation is carried out for 5 min; The concentrates from the four roughing operations are mixed together to form concentrate I, and the tailings are then subjected to reverse flotation.

[0053] (3) Reverse flotation operation: Reverse flotation is carried out on the tailings of the four positive flotation to remove alkaline calcium magnesium gangue minerals. The amount of sodium oleate collector is 500 g / t, and the flotation is 5 min. The bottom product in the reverse flotation cell is mixed with concentrate I to form copper oxide concentrate, and the froth product is tailings.

[0054] On the other hand, as a comparative example, no malachite activator was added in the third stage of positive flotation, and the remaining conditions and parameters were the same as in Example 4. The results are shown in Table 2.

[0055]

[0056] The flotation method of the present invention has higher copper recovery rate, calcium and magnesium removal rate and malachite recovery rate than existing flotation methods.

[0057] Example 5

[0058] For a complex, highly alkaline oxidized copper-cobalt deposit in the Democratic Republic of Congo, Africa, with copper grade of 1.75%, cobalt grade of 0.22%, calcium grade of 9.11%, and magnesium grade of 8.54%, the main copper-bearing minerals are malachite and chrysocolla, while the gangue minerals are mainly quartz and dolomite, with an oxidation rate greater than 90%. The chrysocolla content is approximately 45%. The flotation test procedure is as follows: Figure 5 As shown, the specific flotation experiment steps are as follows:

[0059] (1) Grinding and slurry preparation: Grind the crushed copper oxide ore to a fineness of -0.074 mm accounting for 70%, and then add water to adjust the slurry concentration to 33wt%.

[0060] (2) Direct flotation operation: ① Sulfide flotation of malachite: In the first roughing operation, 600 g / t of sulfide agent NaHS, 800 g / t of collector pentyl xanthate, and 20 g / t of No. 2 oil are added sequentially, and the flotation is carried out for 5 min; In the second roughing operation, 200 g / t of sulfide agent NaHS and 400 g / t of collector pentyl xanthate are added sequentially, and the flotation is carried out for 5 min; ② Activation flotation of silica malachite: In the third roughing operation, 50 g / t of copper sulfate, 50 g / t of sodium carbonate, 40 g / t of sulfide agent NaHS, and 100 g / t of collector pentyl xanthate are added sequentially, and the flotation is carried out for 5 min; In the fourth roughing operation, 50 g / t of collector pentyl xanthate is added, and the flotation is carried out for 5 min; The concentrates from the four roughing operations are mixed together to form concentrate I, and the tailings are then subjected to reverse flotation.

[0061] (3) Reverse flotation operation: Reverse flotation is carried out on the tailings from the four positive flotation to remove alkaline calcium magnesium gangue minerals. The amount of sodium oleate collector is 600 g / t, and the flotation time is 5 min. The bottom product in the reverse flotation cell is mixed with concentrate I to form copper oxide concentrate, and the froth product is tailings.

[0062] On the other hand, as a comparative example, no malachite activator was added in the third stage of positive flotation, and the remaining conditions and parameters were the same as in Example 5. The results are shown in Table 3.

[0063]

[0064] The flotation method of the present invention outperforms existing flotation methods in terms of copper-cobalt recovery rate, calcium-magnesium removal rate, and malachite recovery rate.

Claims

1. A method for activating chrysocolla mineral, characterized in that: The raw chrysocolla ore is ground and slurry is prepared to obtain a slurry. Water-soluble copper salt and water-soluble carbonate are added to the slurry for activation before it enters the flotation process.

2. The method for activating chrysocolla mineral according to claim 1, characterized in that: The concentration of the slurry is 30~60 g / L; The amount of water-soluble copper salt added is 10~50 mg / L; The amount of water-soluble carbonate added is 10~50 mg / L.

3. The method for activating chrysocolla mineral according to claim 1 or 2, characterized in that: The water-soluble copper salt includes at least one of anhydrous copper sulfate, copper sulfate pentahydrate, and copper nitrate; The water-soluble carbonate includes at least one of sodium carbonate and sodium bicarbonate.

4. A flotation method for highly alkaline copper oxide ore or copper-cobalt oxide ore, characterized in that: Includes the following steps: 1) The raw ore of high-alkalinity oxidized copper or high-alkalinity oxidized copper-cobalt ore is crushed, ground, and prepared into a slurry; 2) Add flotation reagents, including sulfiding agents and xanthate collectors, to the slurry to perform flotation I of malachite or malachite-cobalt oxide ore to obtain froth concentrate I and tailings I; 3) The tailings I are activated by water-soluble copper salt and water-soluble carbonate, and then flotation reagents including sulfiding agents and xanthate collectors are added to carry out malachite flotation II to obtain froth concentrate II and tailings II. 4) Add flotation reagents, including fatty acid collectors, to the tailings II to carry out dealkalization of calcium-magnesium gangue minerals III to obtain bottom concentrate III; 5) Combine foam concentrate I, foam concentrate II and bottom flow concentrate III to obtain copper oxide concentrate or copper-cobalt oxide concentrate.

5. The flotation method for highly alkaline copper oxide ore or copper-cobalt oxide ore according to claim 4, characterized in that: The calcium and magnesium grades in the high-alkalinity copper oxide ore or high-alkalinity copper-cobalt oxide ore are both greater than 8%.

6. The flotation method for highly alkaline copper oxide ore or copper-cobalt oxide ore according to claim 4, characterized in that: The grinding process is performed to ensure that the mass percentage of particles with a particle size of -0.074 mm is 50% to 80%. The slurry is prepared to achieve a slurry concentration of 20-40 wt%.

7. A flotation method for highly alkaline copper oxide ore or copper-cobalt oxide ore according to any one of claims 4 to 6, characterized in that: The flotation I process includes two roughing stages: The reagent formulation for the first roughing selection was as follows: 600-800 g / t of sulfiding agent, 500-800 g / t of xanthate collector, and 20-50 g / t of frother. The reagent regime for the second roughing selection was: 100-200 g / t of sulfiding agent and 300-400 g / t of xanthate collector; The flotation II process includes two roughing stages: The reagent regimen for the first roughing selection was as follows: 50-80 g / t of water-soluble copper salt, 50-80 g / t of water-soluble carbonate, 30-50 g / t of sulfiding agent, and 100-200 g / t of xanthate collector. The reagent formulation for the second preliminary selection was: xanthate collector 40~80 g / t.

8. The flotation method for highly alkaline copper oxide ore or copper-cobalt oxide ore according to claim 7, characterized in that: The vulcanizing agent includes at least one of sodium sulfide and sodium hydrosulfide; The xanthate collector includes at least one of propyl xanthate, butyl xanthate and pentyl xanthate; The foaming agent includes No. 2 oil; The water-soluble copper salt includes at least one of anhydrous copper sulfate, copper sulfate pentahydrate, and copper nitrate; The water-soluble carbonate includes at least one of sodium carbonate and sodium bicarbonate.

9. The flotation method for highly alkaline copper oxide ore or copper-cobalt oxide ore according to claim 4, characterized in that: The flotation III process includes a primary roughing stage; The reagent regimen for the rough selection is as follows: 500-800 g / t of fatty acid collector.

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