Flotation method for recovering copper oxide ore in whole size fraction

Abstract

The invention relates to a flotation method for recovering copper oxide ore in a whole-size fraction mode, and belongs to the technical field of mineral processing. According to the invention, the composite grinding aid is adopted to reduce the surface hardness and compressive strength of copper oxide ore particles, reduce the agglomeration of the ore particles and the adhesion of the ore particles on a mill lining plate and an ore grinding medium, and improve the ore grinding performance, dispersion behavior and fraction composition of the ore; the composite regulator realizes selective activation of copper oxide minerals and selective inhibition of gangue minerals in the ores by regulating and controlling the ore pulp environment and the surface characteristics of the minerals; the composite collecting agent can achieve selective enhancement of surface hydrophobicity of copper oxide minerals of different size fractions, and the ore loading effect of foam and the ore sorting property are improved; the newly added fine scavenging operation avoids repeated circulation and accumulation of the copper-containing middlings in roughing and fine scavenging operations, and effectively eliminates the adverse effects of the copper-containing middlings on flotation indexes. According to the method, the whole process of ore grinding, size mixing, collecting and middling circulation is integrally regulated and controlled, and the whole-size-fraction flotation recovery of the copper oxide ore difficult to treat is achieved.

Description

Technical Field

[0001] The invention relates to a flotation method for recovering copper oxide ore in all particle sizes, belonging to the technical field of mineral processing. Background Art

[0002] Flotation is the main method for separating and enriching copper oxide ores. However, due to the strong hydrophilicity of the surface of copper oxide minerals, the high content of soluble salts in the ore, and the complex mosaic relationship with gangue minerals, it is difficult to efficiently recover them using conventional mineral processing methods.

[0003] The particle size of copper oxide ore has a great influence on its recovery index during flotation, so the grinding process control of copper oxide ore is very important. During the grinding process of copper oxide ore, as the ore particles are refined, its surface area gradually increases, and the surface of the ore particles is charged due to bond breaking. The ore particles adsorb each other and agglomerate, which reduces the grinding efficiency. Therefore, adding a certain amount of grinding aids during the grinding process can not only prevent the ore particles from agglomerating, but also improve the fluidity of the ore during the grinding process, thereby improving the grinding efficiency, shortening the grinding time, reducing the grinding energy consumption, optimizing the ore particle size composition, and reducing the muddiness of the ore. In addition, the properties of copper oxide ore are complex, and it is difficult to effectively recover copper minerals of various particle sizes using conventional flotation agents, especially fine-grained copper oxide minerals. It is often necessary to use efficient adjusters and collectors to selectively control the pulp environment and mineral surface properties, so as to achieve effective separation and enrichment of copper oxide minerals and gangue minerals.

[0004] However, the existing grinding aids, regulators and collectors are not suitable for the flotation process of copper oxide ore, resulting in unsatisfactory flotation recovery of copper oxide minerals, which seriously affects the efficient utilization of copper ore resources and the economic benefits of enterprises.

[0005] Therefore, it is urgent to develop a mineral processing method that integrates grinding, slurry preparation and capture to achieve full-size flotation recovery of difficult-to-treat copper oxide ores. Summary of the invention

[0006] In view of the large difference in selectivity of copper oxide minerals of different particle sizes, which are difficult to recover synchronously and seriously affect the efficient utilization of copper ore resources, the present invention proposes a flotation method for recovering copper oxide ore in all particle sizes, adopts a composite grinding aid to improve the grinding performance, dispersion behavior and particle size composition of the ore, a composite regulator to achieve selective activation of copper oxide minerals and selective inhibition of gangue minerals in the ore, a composite collector to improve the ore-carrying effect of the foam and the sorting property of the ore, and at the same time, a new fine sweeping operation is added to avoid repeated circulation and accumulation of copper-containing middlings in roughing and concentrating operations, thereby effectively eliminating its adverse effects on flotation indicators.

[0007] A flotation method for recovering copper oxide ore in full particle size, the specific steps are as follows: (1) mixing the copper oxide ore and the composite grinding aid, and then grinding until the copper oxide mineral monomers are dissociated, adding water to adjust the slurry to a slurry mass percentage concentration of 28-38%, to obtain a copper oxide slurry; (2) adding a composite adjusting agent, a composite collecting agent and a frother to the ore slurry obtained in step (1) in sequence, and performing a roughing operation to obtain a roughing concentrate and a roughing tailing; (3) adding a composite adjusting agent, a composite collecting agent and a frother to the primary roughing tailings obtained in step (2) in sequence, and performing a secondary roughing operation to obtain a secondary roughing concentrate and a secondary roughing tailings; (4) adding a composite adjusting agent, a composite collecting agent and a frother in sequence to the secondary roughing tailings obtained in step (3), and performing scavenging operations to obtain scavenging concentrate and scavenging tailings; (5) combining the primary roughing concentrate obtained in step (2) and the secondary roughing concentrate obtained in step (3), adding a composite adjusting agent and a composite collecting agent, and performing a primary concentration operation to obtain a primary concentrated concentrate and a primary concentrated tailings; (6) The primary concentrated concentrate obtained in step (5) is subjected to secondary concentration operation to obtain copper concentrate I and secondary concentrated tailings; (7) the scavenging concentrate obtained in step (4), the primary concentrated tailings obtained in step (5) and the secondary concentrated tailings obtained in step (6) are combined to form a mixed middling, a composite adjusting agent and a composite collecting agent are sequentially added to the mixed middling, and fine scavenging operation is performed to obtain copper concentrate II and fine scavenging tailings, wherein the fine scavenging tailings are returned to the scavenging operation; (8) The copper concentrate I obtained in step (6) and the copper concentrate II obtained in step (7) are combined to obtain a copper concentrate, and the scavenging tailings obtained in step (4) are copper tailings; The composite grinding aid is a mixture of triethanolamine, diethylene glycol and polyether alcohol amine, the composite adjusting agent is a mixture of sodium sulfide, ammonium phosphate, carboxymethyl cellulose and phosphonocarboxylic acid copolymer, and the composite collector is a mixture of sodium isopentyl dithiocarbonate, sodium diisopropyl dithiophosphate and octyl hydroxamic acid.

[0008] Preferably, the mass percentage content of copper in the copper oxide ore in step (1) is 0.7-1.9%.

[0009] Preferably, the amount of the composite grinding aid added in step (1) is 260-540 g per ton of copper oxide ore.

[0010] Preferably, per ton of copper oxide ore, 1800-2600 g of composite adjusting agent, 520-840 g of composite collecting agent and 40-80 g of foaming agent are added to the ore pulp of the primary roughing operation in step (2).

[0011] Preferably, per ton of copper oxide ore, 900-1300 g of composite adjusting agent, 260-420 g of composite collecting agent and 20-40 g of foaming agent are added to the ore pulp of the secondary roughing operation in step (3).

[0012] Preferably, per ton of copper oxide ore, 450-650 g of composite adjusting agent, 130-210 g of composite collecting agent and 10-20 g of foaming agent are added to the ore pulp of the scavenging operation in step (4).

[0013] Preferably, per ton of copper oxide ore, 225-325 g of the composite regulator and 65-105 g of the composite collector are added to the slurry of the primary concentration operation in step (5).

[0014] Preferably, per ton of copper oxide ore, 600-860 g of the composite regulator and 100-160 g of the composite collector are added to the ore pulp in the fine sweeping operation of step (7).

[0015] Preferably, based on the mass fraction of the composite grinding aid being 100%, triethanolamine accounts for 50-60%, diethylene glycol accounts for 30-40%, and polyether alcohol amine accounts for 5-15%; Taking the mass fraction of the composite regulator as 100%, sodium sulfide accounts for 45-55%, ammonium phosphate accounts for 20-30%, carboxymethyl cellulose accounts for 10-20%, and phosphonocarboxylic acid copolymer accounts for 5-15%; Taking the mass fraction of the composite collector as 100%, sodium isopentyl dithiocarbonate accounts for 40-60%, sodium diisopropyl dithiophosphate accounts for 20-40%, and octyl hydroxamic acid accounts for 10-30%.

[0016] Preferably, the foaming agent is pine oil.

[0017] The beneficial effects of the present invention are: (1) The present invention fully utilizes the synergistic effect of flotation reagents and selectively regulates the pulp environment and mineral surface characteristics through integrated control of the entire process of grinding, slurry adjustment, capture, and intermediate ore circulation, thereby economically and efficiently solving the problem of large differences in selectivity and difficulty in synchronous recovery of copper oxide minerals of different particle sizes in the ore, thus opening up a new path for the efficient separation and enrichment of complex and difficult-to-treat copper ore resources; (2) The present invention adds a composite grinding aid during the ore grinding process to effectively reduce the surface energy of the ore particles, reduce the surface hardness and compressive strength of the copper oxide ore particles, weaken the agglomeration of the ore particles and their adhesion to the mill liner and the grinding medium, improve the grinding performance, dispersion behavior and particle size composition of the ore, thereby improving the grinding efficiency of the copper oxide ore and preventing the ore from being severely muddied; (3) The combined use of the composite regulator and the composite collector of the present invention can not only realize the selective activation of copper oxide minerals and the selective inhibition of gangue minerals in the ore, but also realize the selective enhancement of the surface hydrophobicity of copper oxide minerals of different particle sizes, enhance the difference in floatability between copper oxide minerals and gangue minerals, improve the ore-carrying effect of the foam and the sorting property of the ore, and promote the flotation recovery of all particle sizes of difficult-to-treat copper oxide ores; (4) The present invention adds a fine scavenging operation in the flotation process of oxidized copper ore to centrally process the middlings produced by the concentrating and scavenging operations, so that they do not return to the roughing and concentrating operations, thereby avoiding repeated circulation and accumulation of copper-containing middlings and fine mud in the roughing and concentrating operations, effectively eliminating their adverse effects on flotation indicators, solving the problems of bubble control and mud suppression in the flotation process of oxidized copper ore, and greatly improving the utilization rate of copper ore resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a process flow chart of the present invention. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below in conjunction with specific implementation modes, but the protection scope of the present invention is not limited to the described contents.

[0020] In the following embodiments of the present invention, the composite grinding aid is a mixture of triethanolamine, diethylene glycol and polyether alcohol amine, the composite adjusting agent is a mixture of sodium sulfide, ammonium phosphate, carboxymethyl cellulose and phosphonocarboxylic acid copolymer, and the composite collector is a mixture of sodium isopentyl dithiocarbonate, sodium diisopropyl dithiophosphate and octyl hydroxamic acid.

[0021] Example 1: In this example, based on the mass fraction of the composite grinding aid as 100%, triethanolamine accounts for 50%, diethylene glycol accounts for 35%, and polyether alcohol amine accounts for 15%; based on the mass fraction of the composite adjusting agent as 100%, sodium sulfide accounts for 45%, ammonium phosphate accounts for 25%, carboxymethyl cellulose accounts for 20%, and phosphonocarboxylic acid copolymer accounts for 10%; based on the mass fraction of the composite collector as 100%, sodium isopentyl dithiocarbonate accounts for 40%, sodium diisopropyl dithiophosphate accounts for 40%, and octyl hydroxamic acid accounts for 20%; like Figure 1 As shown, a flotation method for recovering copper oxide ore in all particle sizes, the specific steps are as follows: (1) The copper oxide ore and the composite grinding aid are mixed, and then added into a mill and ground until the copper oxide ore monomers are dissociated, and water is added to adjust the slurry to a slurry mass percentage concentration of 28% to obtain a copper oxide slurry; 260g of the composite grinding aid is added into the mill per ton of the copper oxide ore; wherein the mass percentage content of copper in the copper oxide ore is 0.7%; (2) Adding a composite regulator, a composite collector and a frother in turn to the slurry obtained in step (1), and performing a roughing operation to obtain a roughing concentrate and a roughing tailing; per ton of copper oxide ore, 1800 g of the composite regulator, 520 g of the composite collector and 40 g of the frother are added to the slurry of the roughing operation; (3) Adding a composite regulator, a composite collector and a frother in turn to the primary roughing tailings obtained in step (2), and performing a secondary roughing operation to obtain a secondary roughing concentrate and a secondary roughing tailings; per ton of copper oxide ore, 900 g of the composite regulator, 260 g of the composite collector and 20 g of the frother are added to the slurry of the secondary roughing operation; (4) Adding a composite regulator, a composite collector and a frother in turn to the secondary roughing tailings obtained in step (3), and performing scavenging operations to obtain scavenging concentrates and scavenging tailings; per ton of copper oxide ore, 450 g of the composite regulator, 130 g of the composite collector and 10 g of the frother are added to the slurry of the scavenging operation; (5) the primary roughing concentrate obtained in step (2) and the secondary roughing concentrate obtained in step (3) are combined, and a composite adjusting agent and a composite collecting agent are added to perform a primary concentration operation to obtain a primary concentrated concentrate and a primary concentrated tailings; per ton of copper oxide ore, 225 g of the composite adjusting agent and 65 g of the composite collecting agent are added to the slurry of the primary concentration operation; (6) The primary concentrated concentrate obtained in step (5) is subjected to secondary concentration operation to obtain copper concentrate I and secondary concentrated tailings; (7) The scavenging concentrate obtained in step (4), the primary concentrated tailings obtained in step (5) and the secondary concentrated tailings obtained in step (6) are combined to form a mixed middling ore, a composite regulator and a composite collector are sequentially added to the mixed middling ore, and fine scavenging operation is performed to obtain copper concentrate II and fine scavenging tailings, wherein the fine scavenging tailings are returned to the scavenging operation; per ton of oxidized copper ore, 600 g of the composite regulator and 100 g of the composite collector are added to the slurry of the fine scavenging operation; (8) The copper concentrate I obtained in step (6) and the copper concentrate II obtained in step (7) are combined to obtain a copper concentrate, and the scavenging tailings obtained in step (4) are copper tailings; The flotation recovery rate of copper in this embodiment is 81.8%.

[0022] Example 2: In this example, based on the mass fraction of the composite grinding aid as 100%, triethanolamine accounts for 55%, diethylene glycol accounts for 40%, and polyether alcohol amine accounts for 5%; based on the mass fraction of the composite adjusting agent as 100%, sodium sulfide accounts for 50%, ammonium phosphate accounts for 30%, carboxymethyl cellulose accounts for 15%, and phosphonocarboxylic acid copolymer accounts for 5%; based on the mass fraction of the composite collector as 100%, sodium isopentyl dithiocarbonate accounts for 50%, sodium diisopropyl dithiophosphate accounts for 20%, and octyl hydroxamic acid accounts for 30%; like Figure 1As shown, a flotation method for recovering copper oxide ore in all particle sizes, the specific steps are as follows: (1) The copper oxide ore and the composite grinding aid are mixed, and then added into a mill and ground until the copper oxide ore monomers are dissociated, and water is added to adjust the slurry to a slurry mass percentage concentration of 33% to obtain a copper oxide slurry; 400 g of the composite grinding aid is added into the mill per ton of the copper oxide ore; wherein the mass percentage content of copper in the copper oxide ore is 1.3%; (2) Adding a composite regulator, a composite collector and a frother in turn to the slurry obtained in step (1), and performing a roughing operation to obtain a roughing concentrate and a roughing tailing; per ton of copper oxide ore, 2200 g of the composite regulator, 680 g of the composite collector and 60 g of the frother are added to the slurry of the roughing operation; (3) Adding a composite regulator, a composite collector and a frother in turn to the primary roughing tailings obtained in step (2), and performing a secondary roughing operation to obtain a secondary roughing concentrate and a secondary roughing tailings; per ton of copper oxide ore, 1100 g of the composite regulator, 340 g of the composite collector and 30 g of the frother are added to the slurry of the secondary roughing operation; (4) Adding a composite regulator, a composite collector and a frother in turn to the secondary roughing tailings obtained in step (3), and performing scavenging operations to obtain scavenged concentrates and scavenged tailings; per ton of copper oxide ore, 550 g of the composite regulator, 170 g of the composite collector and 15 g of the frother are added to the slurry of the scavenging operation; (5) the primary roughing concentrate obtained in step (2) and the secondary roughing concentrate obtained in step (3) are combined, and a composite adjusting agent and a composite collecting agent are added to perform a primary concentration operation to obtain a primary concentration concentrate and a primary concentration tailings; per ton of copper oxide ore, 275 g of the composite adjusting agent and 85 g of the composite collecting agent are added to the slurry of the primary concentration operation; (6) The primary concentrated concentrate obtained in step (5) is subjected to secondary concentration operation to obtain copper concentrate I and secondary concentrated tailings; (7) The scavenging concentrate obtained in step (4), the primary concentrated tailings obtained in step (5) and the secondary concentrated tailings obtained in step (6) are combined to form a mixed middling ore, a composite regulator and a composite collector are sequentially added to the mixed middling ore, and fine scavenging operation is performed to obtain copper concentrate II and fine scavenging tailings, wherein the fine scavenging tailings are returned to the scavenging operation; per ton of copper oxide ore, 730 g of the composite regulator and 130 g of the composite collector are added to the slurry of the fine scavenging operation; (8) The copper concentrate I obtained in step (6) and the copper concentrate II obtained in step (7) are combined to obtain a copper concentrate, and the scavenging tailings obtained in step (4) are copper tailings; The flotation recovery rate of copper in this embodiment is 84.2%.

[0023] Example 3: In this example, based on the mass fraction of the composite grinding aid as 100%, triethanolamine accounts for 60%, diethylene glycol accounts for 30%, and polyether alcohol amine accounts for 10%; based on the mass fraction of the composite adjusting agent as 100%, sodium sulfide accounts for 55%, ammonium phosphate accounts for 20%, carboxymethyl cellulose accounts for 10%, and phosphonocarboxylic acid copolymer accounts for 15%; based on the mass fraction of the composite collector as 100%, sodium isopentyl dithiocarbonate accounts for 60%, sodium diisopropyl dithiophosphate accounts for 30%, and octyl hydroxamic acid accounts for 10%; like Figure 1 As shown, a flotation method for recovering copper oxide ore in all particle sizes, the specific steps are as follows: (1) The copper oxide ore and the composite grinding aid are mixed, and then added into a mill and ground until the copper oxide ore monomers are dissociated, and water is added to adjust the slurry to a slurry mass percentage concentration of 38% to obtain a copper oxide slurry; per ton of copper oxide ore, 540 g of the composite grinding aid is added into the mill; wherein the mass percentage content of copper in the copper oxide ore is 1.9%; (2) Adding a composite regulator, a composite collector and a frother in turn to the slurry obtained in step (1), and performing a roughing operation to obtain a roughing concentrate and a roughing tailing; per ton of copper oxide ore, 2600 g of the composite regulator, 840 g of the composite collector and 80 g of the frother are added to the slurry of the roughing operation; (3) adding a composite regulator, a composite collector and a frother in sequence to the primary roughing tailings obtained in step (2), and performing a secondary roughing operation to obtain a secondary roughing concentrate and a secondary roughing tailings; per ton of copper oxide ore, 1300 g of the composite regulator, 420 g of the composite collector and 40 g of the frother are added to the slurry of the secondary roughing operation; (4) Adding a composite regulator, a composite collector and a frother in turn to the secondary roughing tailings obtained in step (3), and performing scavenging operations to obtain scavenged concentrates and scavenged tailings; per ton of copper oxide ore, 650 g of the composite regulator, 210 g of the composite collector and 20 g of the frother are added to the slurry of the scavenging operation; (5) the primary roughing concentrate obtained in step (2) and the secondary roughing concentrate obtained in step (3) are combined, and a composite adjusting agent and a composite collecting agent are added to perform a primary concentration operation to obtain a primary concentrated concentrate and a primary concentrated tailings; per ton of copper oxide ore, 325 g of the composite adjusting agent and 105 g of the composite collecting agent are added to the slurry of the primary concentration operation; (6) The primary concentrated concentrate obtained in step (5) is subjected to secondary concentration operation to obtain copper concentrate I and secondary concentrated tailings; (7) The scavenging concentrate obtained in step (4), the primary concentrated tailings obtained in step (5) and the secondary concentrated tailings obtained in step (6) are combined to form a mixed middling, a composite regulator and a composite collector are sequentially added to the mixed middling, and fine scavenging operation is performed to obtain copper concentrate II and fine scavenging tailings, wherein the fine scavenging tailings are returned to the scavenging operation; per ton of copper oxide ore, 860 g of the composite regulator and 160 g of the composite collector are added to the slurry of the fine scavenging operation; (8) The copper concentrate I obtained in step (6) and the copper concentrate II obtained in step (7) are combined to obtain a copper concentrate, and the scavenging tailings obtained in step (4) are copper tailings; The flotation recovery rate of copper in this embodiment is 86.3%.

[0024] The specific implementation modes of the present invention are described in detail above, but the present invention is not limited to the above implementation modes, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A flotation method for recovering copper oxide ore in all particle sizes, characterized in that: The specific steps are as follows: (1) mixing the copper oxide ore and the composite grinding aid, and then grinding until the copper oxide mineral monomers are dissociated, adding water to adjust the slurry to a slurry mass concentration of 28-38%, thereby obtaining a copper oxide slurry; (2) adding a composite adjusting agent, a composite collecting agent and a frother to the ore slurry obtained in step (1) in sequence, and performing a roughing operation to obtain a primary roughing concentrate and a primary roughing tailings; (3) adding a composite adjusting agent, a composite collecting agent and a frother to the primary roughing tailings obtained in step (2) in sequence, and performing a secondary roughing operation to obtain a secondary roughing concentrate and a secondary roughing tailings; (4) adding a composite adjusting agent, a composite collecting agent and a frother in sequence to the secondary roughing tailings obtained in step (3), and performing scavenging operations to obtain scavenging concentrate and scavenging tailings; (5) combining the primary roughing concentrate obtained in step (2) and the secondary roughing concentrate obtained in step (3), adding a composite adjusting agent and a composite collecting agent, and performing a primary concentration operation to obtain a primary concentrated concentrate and a primary concentrated tailings; (6) The primary concentrated concentrate obtained in step (5) is subjected to secondary concentration operation to obtain copper concentrate I and secondary concentrated tailings; (7) the scavenging concentrate obtained in step (4), the primary concentrated tailings obtained in step (5) and the secondary concentrated tailings obtained in step (6) are combined to form a mixed middling, a composite adjusting agent and a composite collecting agent are sequentially added to the mixed middling, and fine scavenging operation is performed to obtain copper concentrate II and fine scavenging tailings, wherein the fine scavenging tailings are returned to the scavenging operation; (8) The copper concentrate I obtained in step (6) and the copper concentrate II obtained in step (7) are combined to obtain a copper concentrate, and the scavenging tailings obtained in step (4) are copper tailings; The composite grinding aid is a mixture of triethanolamine, diethylene glycol and polyether alcohol amine, the composite adjusting agent is a mixture of sodium sulfide, ammonium phosphate, carboxymethyl cellulose and phosphonocarboxylic acid copolymer, and the composite collector is a mixture of sodium isopentyl dithiocarbonate, sodium diisopropyl dithiophosphate and octyl hydroxamic acid.

2. The flotation method for recovering copper oxide ore in full particle size according to claim 1, characterized in that: The copper content in the copper oxide ore in step (1) is 0.7-1.9% by mass.

3. The flotation method for recovering copper oxide ore in full particle size according to claim 1, characterized in that: The amount of the composite grinding aid added in step (1) is 260-540 g per ton of copper oxide ore.

4. The flotation method for recovering copper oxide ore in full particle size according to claim 1, characterized in that: Based on each ton of copper oxide ore, 1800-2600 g of composite adjusting agent, 520-840 g of composite collecting agent and 40-80 g of foaming agent are added to the ore pulp of the primary roughing operation in step (2).

5. The flotation method for recovering copper oxide ore according to claim 1, characterized in that: Based on each ton of copper oxide ore, 900-1300 g of composite adjusting agent, 260-420 g of composite collecting agent and 20-40 g of foaming agent are added to the ore pulp of the secondary roughing operation in step (3).

6. The flotation method for recovering copper oxide ore in full particle size according to claim 1, characterized in that: Based on each ton of copper oxide ore, 450-650 g of a composite adjusting agent, 130-210 g of a composite collecting agent and 10-20 g of a foaming agent are added to the slurry of the scavenging operation in step (4).

7. The flotation method for recovering copper oxide ore in full particle size according to claim 1, characterized in that: Based on each ton of copper oxide ore, 225-325 g of composite adjusting agent and 65-105 g of composite collecting agent are added to the ore pulp of the primary concentration operation in step (5).

8. The flotation method for recovering copper oxide ore in full particle size according to claim 1, characterized in that: Based on each ton of copper oxide ore, 600-860 g of the composite regulator and 100-160 g of the composite collector are added to the slurry of the fine sweeping operation in step (7).

9. The flotation method for recovering copper oxide ore in full particle size according to claim 1, characterized in that: Taking the mass fraction of the composite grinding aid as 100%, triethanolamine accounts for 50-60%, diethylene glycol accounts for 30-40%, and polyether alcohol amine accounts for 5-15%; Taking the mass fraction of the composite regulator as 100%, sodium sulfide accounts for 45-55%, ammonium phosphate accounts for 20-30%, carboxymethyl cellulose accounts for 10-20%, and phosphonocarboxylic acid copolymer accounts for 5-15%; Taking the mass fraction of the composite collector as 100%, sodium isopentyl dithiocarbonate accounts for 40-60%, sodium diisopropyl dithiophosphate accounts for 20-40%, and octyl hydroxamic acid accounts for 10-30%.

10. The flotation method for recovering copper oxide ore in full particle size according to claim 1, characterized in that: The foaming agent is pine oil.

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