Fine-grain dip-dyed sulfur-oxygen mixed copper-cobalt ore dressing and smelting combined process method

Abstract

The invention discloses a beneficiation-metallurgy combined process method for fine-grain dip-dyed sulfur-oxygen mixed copper-cobalt ore. The beneficiation-metallurgy combined process method comprises the following steps: firstly, dividing raw ore into fine-grain dip-dyed sulfur-oxygen mixed copper-cobalt ore and refractory sulfur-oxygen mixed copper-cobalt ore; grinding the sulfur-oxygen mixed copper-cobalt ore subjected to fine grain dip dyeing, and carrying out copper sulfide roughing, copper sulfide concentration, copper sulfide scavenging, regrinding and reflotation, copper oxide flotation and magnetic separation; copper sulfide concentrate, copper oxide rough concentrate, copper oxide concentrate 1, copper oxide concentrate 2, copper oxide concentrate 3 and magnetic concentrate are obtained; and the refractory sulfur-oxygen mixed copper-cobalt ore is ground, copper sulfide flotation is conducted, and copper sulfide concentrate and sulfur separation tailings are obtained. According to the method, copper sulfide flotation is conducted on the raw ore, then regrinding is conducted, copper sulfide and copper oxide monomers subjected to fine grain dip dyeing are dissociated, mutual content of copper sulfide and copper oxide in the copper oxide concentrate is reduced, and copper sulfide is fully recycled.

Description

Technical Field

[0001] This invention relates to the field of mineral processing and smelting, specifically to a combined process for the beneficiation and smelting of sulfur-oxygen mixed copper-cobalt ore. Background Technology

[0002] With economic development, the demand for copper and cobalt metals is increasing, while easily mined and beneficiated copper and cobalt resources are decreasing. Fine-grained, highly conglomerate copper and cobalt ores are gradually becoming important raw materials for copper and cobalt production. However, due to the complex mineral composition and severe mudification of sulfur-oxygen mixed copper-cobalt ores, and the unevenness of the mineral surface leading to incomplete or even non-sulfidation in some areas, effective recovery of copper and cobalt minerals is often difficult. While the beneficiation recovery rate of such fine-grained, disseminated sulfur-oxygen mixed copper-cobalt ores can generally exceed 60%, the fine particle size of valuable minerals in some sulfur-oxygen mixed ores, when using a flotation process that first removes sulfur and then oxygen, reveals severe intermingling of copper sulfide and copper oxide within the copper oxide, resulting in sometimes low copper oxide leaching rates. Although further flotation of the copper oxide leaching residue can recover copper sulfide minerals from the residue, the resulting concentrate is of low grade and poor quality, and the utilization process for the residue concentrate is complex and costly. Furthermore, because sulfur-oxygen mixed copper-cobalt ores often contain a large amount of calcium and magnesium minerals, the leaching acid consumption of some copper oxide concentrates is high, resulting in poor economic efficiency. This is especially true for scavenged copper oxide concentrates, where the acid consumption per ton of copper often exceeds 20 tons of acid per ton of copper, making these concentrates difficult to utilize. These low-grade copper oxide concentrates have high binding rates and contain a large amount of calcium, magnesium, and copper oxide minerals intermingled. Re-grinding and re-flotation, or reverse flotation, of the scavenged copper oxide concentrates are not very effective. Therefore, strengthening the research on the beneficiation and metallurgical processes of fine-grained disseminated sulfur-oxygen mixed copper-cobalt ores to improve the separation efficiency and economic benefits of these ores has become an urgent problem to be solved. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the above-mentioned defects of the prior art and provide a process method to improve the beneficiation effect of fine-grained impregnated sulfur-oxygen mixed copper-cobalt ore.

[0004] The technical solution adopted by the present invention to solve its technical problem is as follows: a combined process for beneficiation and smelting of fine-grained disseminated sulfur-oxygen mixed copper-cobalt ore, wherein the raw ore is first divided into fine-grained disseminated sulfur-oxygen mixed copper-cobalt ore and refractory sulfur-oxygen mixed copper-cobalt ore. In the fine-grained disseminated sulfide-oxygen mixed copper-cobalt ore, the intercalation size of copper sulfide minerals is less than 30 μm. The fine-grained disseminated sulfur-oxygen mixed copper-cobalt ore has a copper grade of 3.5 wt% or more and a copper sulfide content of 40% or more in the copper-bearing minerals, or a copper grade of 0.8 wt% to 3.5 wt% and a copper sulfide content of 20 wt% or more in the copper-bearing minerals. The copper grade of the refractory sulfur-oxygen mixed copper-cobalt ore is above 0.8 wt%, and the copper sulfide content in the copper-bearing minerals is below 20 wt%. The finely disseminated sulfur-oxygen mixed copper-cobalt ore is ground to obtain a raw ore slurry, during which a sulfiding agent and a collector are added; The obtained raw ore slurry is subjected to copper sulfide roughing to obtain copper sulfide rough concentrate and copper sulfide roughing tailings; The copper sulfide rough concentrate is subjected to copper sulfide beneficiation to obtain copper sulfide concentrate and copper sulfide beneficiation tailings; The copper sulfide roughing tailings are subjected to copper sulfide scavenging to obtain copper sulfide scavenging concentrate and copper sulfide scavenging tailings. The copper sulfide tailings and / or copper sulfide scavenging concentrate are regrinded and then refloted to obtain copper oxide concentrate 1, copper oxide concentrate 2 and reflotation tailings. The copper sulfide scavenging tailings are subjected to copper oxide flotation to obtain copper oxide rough concentrate, copper oxide concentrate 3 and copper oxide flotation tailings. The reflotation tailings and / or copper oxide flotation tailings are subjected to magnetic separation to obtain magnetic concentrate; The refractory sulfur-oxygen mixed copper-cobalt ore is ground to obtain raw ore slurry C; raw ore slurry C is subjected to copper sulfide flotation C to obtain copper sulfide concentrate C and sulfur beneficiation tailings. The obtained copper sulfide concentrate and / or copper sulfide concentrate C are roasted and then wet leached; the obtained copper oxide crude concentrate and / or sulfur tailings are wet leached; one or more of copper oxide concentrate 1, copper oxide concentrate 2, copper oxide concentrate 3, and magnetic separation concentrate are wet leached and / or neutralized with the raffinate obtained from smelting leaching. The particle size of the raw ore slurry is: -0.074mm particles account for 65wt%-75wt%; In the regrinded slurry, particles with a size of -0.074 mm account for 80 wt%-98 wt%. The particle size of the raw ore slurry C is: -0.074mm particles account for 60wt%-85wt%.

[0005] Preferably, in the fine-grained impregnated sulfur-oxygen mixed copper-cobalt ore, the copper-bearing minerals include one or more of chalcocite, bornite, chalcopyrite, copper-cobaltite, malachite, chrysocolla, covellite, and cuprite; the cobalt-bearing minerals include one or more of hydrocobaltite, cobalt dolomite, copper-cobaltite, and cobalt associated with copper minerals; and the gangue minerals include one or more of quartz, dolomite, muscovite, and chlorite.

[0006] Preferably, during the grinding process of the finely impregnated sulfur-oxygen mixed copper-cobalt ore, 30g / t to 300g / t of sulfidating agent and 50g / t to 400g / t of collector are added.

[0007] Preferably, the particle size of the raw ore slurry is: 70wt%-73wt% of the particle size is -0.074mm.

[0008] Preferably, the concentration of the raw ore slurry is 32wt%~38wt%.

[0009] Preferably, the concentration of the refmilled slurry is 25wt%-38wt%.

[0010] Preferably, in the refmilled slurry, the particle size is -0.074 mm, accounting for 85wt%-95wt%.

[0011] Preferably, the particle size of the raw ore slurry C is: 65wt%-80wt% of particles with a particle size of -0.074mm.

[0012] Preferably, the slurry concentration of the raw ore slurry C is 28wt%~38wt%.

[0013] Preferably, the copper sulfide roughing includes one or more stages; the concentrate from each stage of copper sulfide roughing is the copper sulfide rough concentrate, the tailings from the last stage of copper sulfide roughing is the copper sulfide roughing tailings, and the tailings from other stages of copper sulfide roughing are sent to the next stage of operation.

[0014] Preferably, a collector and a foaming agent are added during the roughing of the copper sulfide.

[0015] Preferably, the amount of collector used in the roughing of copper sulfide is less than 70 g / t, and the amount of foaming agent is 10 g / t to 140 g / t.

[0016] Preferably, the copper sulfide beneficiation includes one or more stages; the concentrate from the last stage of copper sulfide beneficiation is the copper sulfide concentrate, and the concentrates from other stages of copper sulfide beneficiation are sent to the next stage of operation; the tailings from the first stage of copper sulfide beneficiation are the copper sulfide beneficiation tailings, and the tailings from other stages of copper sulfide beneficiation are returned to the previous stage of operation.

[0017] Preferably, the copper sulfide scavenging includes one or more stages; the concentrate from each stage of copper sulfide scavenging is the copper sulfide scavenging concentrate, the tailings from the last stage of copper sulfide scavenging is the copper sulfide scavenging tailings, and the tailings from other stages of copper sulfide scavenging are sent to the next stage of operation.

[0018] Preferably, a collector and a foaming agent are added during the copper sulfide scavenging process.

[0019] Preferably, the amount of collector used in the copper sulfide scavenging process is less than 50 g / t and the amount of foaming agent is less than 10 g / t.

[0020] Preferably, the reflotation process includes, in sequence, copper sulfide roughing B, copper sulfide scavenging B, copper oxide roughing B, and copper oxide scavenging B; each of the copper sulfide roughing B, copper sulfide scavenging B, copper oxide roughing B, and copper oxide scavenging B includes one or more stages; the tailings obtained from the last stage of reflotation are the reflotation tailings, and the tailings from other stages of flotation are sent to the next stage of operation.

[0021] Preferably, the concentrate from the copper sulfide roughing process B is fed into the copper sulfide cleaning process.

[0022] Preferably, the concentrate from the copper sulfide scavenging process B is fed into the copper sulfide beneficiation process.

[0023] Preferably, the concentrate of the copper oxide roughing process B is the copper oxide concentrate 1.

[0024] Preferably, the concentrate of the copper oxide scavenging process B is the copper oxide concentrate 2.

[0025] Preferably, a collector and a foaming agent are added to the copper sulfide roughing process B.

[0026] Preferably, the amount of collector used in the copper sulfide roughing process B is 5g / t to 100g / t, and the amount of frother used is 5g / t to 50g / t.

[0027] Preferably, a collector and a foaming agent are added to the copper sulfide scavenging agent B.

[0028] Preferably, the amount of collector used in the copper sulfide scavenging process B is less than 40 g / t and the amount of foaming agent is less than 10 g / t.

[0029] Preferably, the crude copper oxide fractionation B contains an inhibitor, a sulfiding agent, a collector, and a foaming agent.

[0030] Preferably, in the crude copper oxide selection B, the dosage of inhibitor is 100g / t to 1500g / t, the dosage of sulfiding agent is 200g / t to 3000g / t, the dosage of collector is 5g / t to 50g / t, and the dosage of foaming agent is less than 20g / t.

[0031] Preferably, the copper oxide scavenging agent B contains an inhibitor, a sulfiding agent, a collector, and a foaming agent.

[0032] Preferably, in the copper oxide scavenging process B, the amount of inhibitor is 30g / t to 700g / t, the amount of sulfiding agent is 100g / t to 1500g / t, the amount of collector is less than 30g / t, and the amount of foaming agent is less than 10g / t.

[0033] Preferably, the collector used in the re-flotation includes a combination of pentyl xanthate and Z200 in a mass ratio of 1:1 to 3.

[0034] Preferably, the inhibitor used in the re-flotation includes a combination of carboxymethyl cellulose and sodium hexametaphosphate in a mass ratio of 1:1 to 4.

[0035] Preferably, the copper oxide flotation process includes copper oxide roughing and copper oxide scavenging in sequence; the copper oxide roughing and copper oxide scavenging each include one or more stages; the tailings obtained from the last stage of the copper oxide flotation are the copper oxide flotation tailings, and the tailings from other stages of flotation are sent to the next stage of operation.

[0036] Preferably, the concentrate from each stage of copper oxide roughing is the copper oxide rough concentrate.

[0037] Preferably, the concentrate obtained from each stage of copper oxide scavenging is the copper oxide concentrate 3.

[0038] Preferably, a sulfiding agent, a collector, and a foaming agent are added during the roughing of the copper oxide.

[0039] Preferably, in the roughing process of copper oxide, the amount of sulfiding agent is 650g / t to 5500g / t, the amount of collector is 60g / t to 550g / t, and the amount of foaming agent is 10g / t to 50g / t.

[0040] Preferably, a sulfiding agent, a collector, and a foaming agent are added during the copper oxide scavenging process.

[0041] Preferably, the amount of sulfiding agent used in the copper oxide scavenging process is 200g / t to 2000g / t, the amount of collector is 15g / t to 200g / t, and the amount of foaming agent is less than 30g / t.

[0042] Preferably, the magnetic separation includes magnetic roughing and magnetic cleaning, wherein the concentrate from the magnetic roughing is fed into the magnetic cleaning process, and the concentrate from the magnetic cleaning process is magnetically separated concentrate.

[0043] Preferably, the field strength used in the magnetic coarse separation is 0.8T~1.5T.

[0044] Preferably, the field strength used in the magnetic selection is 0.8T~1.5T.

[0045] Preferably, the copper sulfide flotation C includes copper sulfide roughing C, copper sulfide cleaning C, and copper sulfide scavenging C: the obtained raw ore slurry C is subjected to copper sulfide roughing C to obtain copper sulfide rough concentrate C and copper sulfide roughing tailings C; the copper sulfide rough concentrate C is subjected to copper sulfide cleaning C to obtain copper sulfide concentrate C and copper sulfide cleaning tailings C; the copper sulfide roughing tailings C is subjected to copper sulfide scavenging C to obtain copper sulfide scavenging concentrate C and copper sulfide scavenging tailings C; the copper sulfide cleaning tailings C and / or copper sulfide scavenging concentrate C are returned to copper sulfide roughing C; the copper sulfide scavenging tailings C are sulfur beneficiation tailings.

[0046] Preferably, a sulfiding agent, a collector, and a frother are added to the copper sulfide flotation C.

[0047] Preferably, in the copper sulfide flotation C, the amount of sulfiding agent is less than 200g / t, the amount of collector is 50g / t to 400g / t, and the amount of frother is 10g / t to 60g / t.

[0048] Preferably, the copper sulfide roughing C includes one or more stages; the concentrate from each stage of copper sulfide roughing C is the copper sulfide rough concentrate C, the tailings from the last stage of copper sulfide roughing C is the copper sulfide roughing tailings C, and the tailings from other stages of copper sulfide roughing C are sent to the next stage of operation.

[0049] Preferably, the copper sulfide beneficiation C includes one or more stages; the concentrate of the last stage of copper sulfide beneficiation C is the copper sulfide concentrate C, and the concentrates of other stages of copper sulfide beneficiation C are sent to the next stage of operation; the tailings of the first stage of copper sulfide beneficiation C are the copper sulfide beneficiation tailings C, and the tailings of other stages of copper sulfide beneficiation C are returned to the previous stage of operation.

[0050] Preferably, the copper sulfide scavenging C includes one or more stages; the concentrate from each stage of copper sulfide scavenging C is the copper sulfide scavenging concentrate C, the tailings from the last stage of copper sulfide scavenging C is the copper sulfide scavenging tailings C, and the tailings from other stages of copper sulfide scavenging C are sent to the next stage of operation.

[0051] The notation “-0.074mm” and “-200 mesh” is common in the mineral processing industry. The negative sign indicates that the value is below that value. For example, the particle size of -0.074mm indicates that the particle size is below 0.074mm.

[0052] The present invention has the following beneficial effects: (1) The present invention rationally classifies sulfur-oxygen mixed ore and uses different beneficiation and smelting processes to improve the recovery rate of fine-grained disseminated copper-cobalt ore and reduce beneficiation and smelting costs. (2) The present invention performs roughing, scavenging and cleaning of copper sulfide in fine-grained disseminated copper-cobalt ore, and re-grinds the copper sulfide scavenging concentrate and the copper sulfide cleaning tailings to dissociate the fine-grained disseminated copper sulfide and copper oxide monomers, reduce the mutual inclusion of copper sulfide and copper oxide in the copper oxide concentrate, and fully recover copper sulfide. (3) The present invention separates copper oxide concentrate products with different acid consumption through each process, which makes it easier to flexibly select the subsequent processing method of copper oxide concentrate products according to acid consumption. This not only saves a lot of sulfuric acid and neutralizing lime, but also releases some smelting capacity, thereby maximizing benefits.

[0053] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0054] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a flowchart of the combined beneficiation and smelting process of fine-grained impregnated sulfur-oxygen mixed copper-cobalt ore according to Embodiment 1 of the present invention; Figure 2 This is a flowchart of the beneficiation process for fine-grained disseminated sulfur-oxygen mixed copper-cobalt ore in Embodiment 1 of the present invention. Figure 3 This is the process flow diagram for Comparative Example 1; Figure 4 This is a process flow diagram of the beneficiation of fine-grained sulfur-oxygen mixed copper-cobalt ore in Comparative Example 1. Figure 5 This is a flowchart of the difficult-to-process sulfur-oxygen mixed copper-cobalt ore beneficiation process in the fine-grained impregnation process of ... present invention, specifically the section on the difficult-to-process sulfur-oxygen mixed copper-cobalt ore. Detailed Implementation

[0055] To make the objectives, solutions, and beneficial technologies of this invention clearer, the invention will be further described in detail below with reference to embodiments and accompanying drawings. It should be noted that the embodiments described in this specification are merely illustrative of the invention and are not intended to limit the invention.

[0056] For simplicity, this paper only explicitly discloses some numerical ranges. However, any lower limit can be combined with any upper limit to form an undefined range; and any lower limit can be combined with other lower limits to form an undefined range, just as any upper limit can be combined with any other upper limit to form an undefined range. Furthermore, although not explicitly stated, every point or individual value between the endpoints of a range is included within that range. Therefore, each point or individual value can serve as its own lower or upper limit and be combined with any other point or individual value, or with other lower or upper limits, to form an undefined range.

[0057] In this description, it should be noted that, unless otherwise stated, "above" and "below" include the stated number, "multiple" in "one or more" means two or more, and "more than" in "one or more" means two or more.

[0058] The notation “-0.074mm” and “-200 mesh” is common in the mineral processing industry. The negative sign indicates that the value is below that value. For example, the particle size of -0.074mm indicates that the particle size is below 0.074mm.

[0059] An embodiment of the present invention provides a combined beneficiation and smelting process for fine-grained disseminated sulfur-oxygen mixed copper-cobalt ore, wherein the raw ore is first divided into fine-grained disseminated sulfur-oxygen mixed copper-cobalt ore and refractory sulfur-oxygen mixed copper-cobalt ore. In the fine-grained disseminated sulfide-oxygen mixed copper-cobalt ore, the intercalation size of copper sulfide minerals is less than 30 μm. The fine-grained disseminated sulfur-oxygen mixed copper-cobalt ore has a copper grade of 3.5 wt% or more and a copper sulfide content of 40% or more in the copper-bearing minerals, or a copper grade of 0.8 wt% to 3.5 wt% and a copper sulfide content of 20 wt% or more in the copper-bearing minerals. The copper grade of the refractory sulfur-oxygen mixed copper-cobalt ore is above 0.8 wt%, and the copper sulfide content in the copper-bearing minerals is below 20 wt%; the beneficiation recovery rate of the refractory sulfur-oxygen mixed copper-cobalt ore is less than 60%. The finely disseminated sulfur-oxygen mixed copper-cobalt ore is ground to obtain a raw ore slurry, during which a sulfiding agent and a collector are added; The obtained raw ore slurry is subjected to copper sulfide roughing to obtain copper sulfide rough concentrate and copper sulfide roughing tailings; The copper sulfide rough concentrate is subjected to copper sulfide beneficiation to obtain copper sulfide concentrate and copper sulfide beneficiation tailings; The copper sulfide roughing tailings are subjected to copper sulfide scavenging to obtain copper sulfide scavenging concentrate and copper sulfide scavenging tailings. The copper sulfide tailings and / or copper sulfide scavenging concentrate are regrinded and then refloted to obtain copper oxide concentrate 1, copper oxide concentrate 2 and reflotation tailings. The copper sulfide scavenging tailings are subjected to copper oxide flotation to obtain copper oxide rough concentrate, copper oxide concentrate 3 and copper oxide flotation tailings. The reflotation tailings and / or copper oxide flotation tailings are subjected to magnetic separation to obtain magnetic concentrate; The refractory sulfur-oxygen mixed copper-cobalt ore is ground to obtain raw ore slurry C; raw ore slurry C is subjected to copper sulfide flotation C to obtain copper sulfide concentrate C and sulfur beneficiation tailings. The obtained copper sulfide concentrate and / or copper sulfide concentrate C are roasted and then wet leached; the obtained copper oxide crude concentrate and / or sulfur tailings are wet leached; one or more of copper oxide concentrate 1, copper oxide concentrate 2, copper oxide concentrate 3, and magnetic separation concentrate are wet leached and / or neutralized with the raffinate obtained from smelting leaching. The particle size of the raw ore slurry is: -0.074mm particles account for 65wt%-75wt%; In the regrinded slurry, particles with a size of -0.074 mm account for 80 wt%-98 wt%. The particle size of the raw ore slurry C is: -0.074mm particles account for 60wt%-85wt%.

[0060] The characteristics of fine-grained disseminated copper-cobalt sulfide-oxygen mixtures are as follows: fine-grained copper-bearing minerals and gangue coexist; some copper sulfide minerals exhibit filamentous, dotted, network-like, vein-like, and irregular disseminated patterns; the useful minerals are fine-grained, but some copper sulfide minerals are coarse-grained. Therefore, selective grinding of copper-bearing and gangue minerals is necessary. At lower grinding degrees, coarse copper sulfide is better liberated, but fine copper-bearing minerals do not achieve sufficient individual liberation and cannot smoothly enter the concentrate product, potentially entering the tailings or copper oxide, resulting in losses. Furthermore, the poor floatability of intergrowths may lead to easy detachment during beneficiation. At higher grinding degrees, over-grinding of coarse copper sulfide leads to mud formation, which may enter the tailings, reducing the recovery rate. Moreover, if the overall fineness increases to 80%, grinding energy consumption and auxiliary material consumption increase significantly (after the grinding fineness reaches 75%, consumption increases several times for every 1% increase in fineness).

[0061] Fine-grained disseminated sulfur-oxygen mixed copper-cobalt ores contain some copper-cobalt symbiotic deposits, such as copper-bearing cuprite, copper-bearing limonite, and copper-cobalt-bearing pyrolusite. These deposits are weakly magnetic, and some concentrates can be recovered through magnetic separation.

[0062] In embodiments of the present invention, the fine-grained impregnated sulfur-oxygen mixed copper-cobalt ore contains one or more of the following copper-bearing minerals: chalcocite, bornite, chalcopyrite, copper-cobaltite, malachite, chrysocolla, covellite, and cuprite; one or more of the following cobalt-bearing minerals: hydrocobaltite, cobalt dolomite, copper-cobaltite, and cobalt associated with copper minerals; and one or more of the following gangue minerals: quartz, dolomite, muscovite, and chlorite.

[0063] In an embodiment of the present invention, 30 g / t to 300 g / t of sulfiding agent and 50 g / t to 400 g / t of collector are added during the grinding process of the finely disseminated sulfur-oxygen mixed copper-cobalt ore.

[0064] In some embodiments of the present invention, the sulfiding agent added during the grinding process includes sodium hydrosulfide and / or sodium sulfide.

[0065] In some embodiments of the present invention, the collector added during the grinding process includes pentyl xanthate and / or butyl xanthate.

[0066] In an embodiment of the present invention, the particle size of the raw ore slurry is: 70wt%-73wt% of the particle size is -0.074mm.

[0067] In an embodiment of the present invention, the concentration of the raw ore slurry is 32wt%~38wt%.

[0068] In an embodiment of the present invention, the concentration of the refmilled slurry is 25wt%-38wt%.

[0069] In an embodiment of the present invention, the particle size of the refmilled slurry is 85wt%-95wt% with a particle size of -0.074mm.

[0070] In an embodiment of the present invention, the particle size of the raw ore slurry C is: 65wt%-80wt% of the particle size is -0.074mm.

[0071] In an embodiment of the present invention, the slurry concentration of the raw ore slurry C is 28wt%~38wt%.

[0072] In an embodiment of the present invention, the copper sulfide roughing includes one or more stages; the concentrate from each stage of copper sulfide roughing is the copper sulfide rough concentrate, the tailings from the last stage of copper sulfide roughing is the copper sulfide roughing tailings, and the tailings from other stages of copper sulfide roughing are sent to the next stage of operation.

[0073] In an embodiment of the present invention, a collector and a foaming agent are added during the roughing of the copper sulfide.

[0074] In an embodiment of the present invention, the amount of collector used in the roughing selection of copper sulfide is less than 70 g / t, and the amount of foaming agent is 10 g / t to 140 g / t.

[0075] In some embodiments of the present invention, the collector added during the roughing of copper sulfide includes pentyl xanthate and / or butyl xanthate.

[0076] In some embodiments of the present invention, the foaming agent added during the roughing of the copper sulfide includes pine oil.

[0077] In an embodiment of the present invention, the copper sulfide beneficiation includes one or more stages; the concentrate from the last stage of copper sulfide beneficiation is the copper sulfide concentrate, and the concentrates from other stages of copper sulfide beneficiation are sent to the next stage of operation; the tailings from the first stage of copper sulfide beneficiation are the copper sulfide beneficiation tailings, and the tailings from other stages of copper sulfide beneficiation are returned to the previous stage of operation.

[0078] In some embodiments of the present invention, the copper sulfide is selected at a grade of 2 to 4.

[0079] In an embodiment of the present invention, the copper sulfide scavenging includes one or more stages; the concentrate from each stage of copper sulfide scavenging is the copper sulfide scavenging concentrate, the tailings from the last stage of copper sulfide scavenging is the copper sulfide scavenging tailings, and the tailings from other stages of copper sulfide scavenging are sent to the next stage of operation.

[0080] In embodiments of the present invention, a collector and a foaming agent are added to the copper sulfide scavenging process.

[0081] In an embodiment of the present invention, the amount of collector used in the copper sulfide scavenging process is less than 50 g / t and the amount of foaming agent is less than 10 g / t.

[0082] In some embodiments of the present invention, the collector added during the copper sulfide scavenging includes pentyl xanthate and / or butyl xanthate.

[0083] In some embodiments of the present invention, the foaming agent added to the copper sulfide scavenging process includes pine oil.

[0084] In some embodiments of the present invention, regrinding is performed using a hydrocyclone to classify and grind the large-particle-size sediment product.

[0085] In an embodiment of the present invention, the reflotation process sequentially includes copper sulfide roughing B, copper sulfide scavenging B, copper oxide roughing B, and copper oxide scavenging B; each of the copper sulfide roughing B, copper sulfide scavenging B, copper oxide roughing B, and copper oxide scavenging B includes one or more stages; the tailings obtained from the last stage of reflotation are the reflotation tailings, and the tailings from other stages of flotation are sent to the next stage of operation.

[0086] In an embodiment of the present invention, the concentrate from the copper sulfide roughing process B is fed into the copper sulfide beneficiation process.

[0087] In an embodiment of the present invention, the concentrate from the copper sulfide scavenging process B is fed into the copper sulfide beneficiation process.

[0088] In an embodiment of the present invention, the concentrate of the copper oxide roughing process B is the copper oxide concentrate 1.

[0089] In an embodiment of the present invention, the concentrate of the copper oxide scavenging B is the copper oxide concentrate 2.

[0090] In an embodiment of the present invention, a collector and a foaming agent are added to the copper sulfide roughing process B.

[0091] In an embodiment of the present invention, the amount of collector used in the copper sulfide roughing process B is 5g / t to 100g / t, and the amount of frother used is 5g / t to 50g / t.

[0092] In an embodiment of the present invention, a collector and a foaming agent are added to the copper sulfide scavenging agent B.

[0093] In an embodiment of the present invention, the amount of collector used in the copper sulfide scavenging B is less than 40 g / t and the amount of foaming agent is less than 10 g / t.

[0094] In an embodiment of the present invention, an inhibitor, a sulfiding agent, a collector, and a foaming agent are added to the copper oxide roughing process B.

[0095] In an embodiment of the present invention, the amount of inhibitor used in the roughing of copper oxide (B) is 100g / t to 1500g / t, the amount of sulfiding agent is 200g / t to 3000g / t, the amount of collector is 5g / t to 50g / t, and the amount of foaming agent is less than 20g / t.

[0096] In an embodiment of the present invention, an inhibitor, a sulfiding agent, a collector, and a foaming agent are added to the copper oxide scavenging agent B.

[0097] In the embodiments of the present invention, the amount of inhibitor used in the copper oxide scavenging B is 30g / t to 700g / t, the amount of sulfiding agent is 100g / t to 1500g / t, the amount of collector is less than 30g / t, and the amount of foaming agent is less than 10g / t.

[0098] In an embodiment of the present invention, the collector used in the re-flotation includes a combination of pentyl xanthate and Z200 in a mass ratio of 1:1 to 3.

[0099] In an embodiment of the invention, the depressant used in the reflotation comprises a combination of carboxymethyl cellulose and sodium hexametaphosphate in a mass ratio of 1:1 to 4. This combination of depressants is highly effective in suppressing gangue and dispersing slime.

[0100] In some embodiments of the present invention, the sulfiding agent used in the reflotation includes sodium hydrosulfide and / or sodium sulfide.

[0101] In some embodiments of the present invention, the foaming agent used in the reflotation includes pine oil.

[0102] In some embodiments of the present invention, the copper sulfide tailings are stirred for 3-8 minutes after the addition of the sulfiding agent.

[0103] In an embodiment of the present invention, the copper oxide flotation process sequentially includes copper oxide roughing and copper oxide scavenging; the copper oxide roughing and copper oxide scavenging processes each include one or more stages; the tailings obtained from the last stage of the copper oxide flotation are the copper oxide flotation tailings, and the tailings from other stages of flotation are sent to the next stage of operation.

[0104] In an embodiment of the present invention, the concentrate from each stage of copper oxide roughing is the copper oxide rough concentrate.

[0105] In an embodiment of the present invention, the concentrate obtained from each stage of copper oxide scavenging is the copper oxide concentrate 3.

[0106] In embodiments of the present invention, a sulfiding agent, a collector, and a foaming agent are added during the roughing process of copper oxide.

[0107] In an embodiment of the present invention, the amount of sulfiding agent used in the roughing selection of copper oxide is 650g / t to 5500g / t, the amount of collector is 60g / t to 550g / t, and the amount of foaming agent is 10g / t to 50g / t.

[0108] In embodiments of the present invention, a sulfiding agent, a collector, and a foaming agent are added to the copper oxide scavenging process.

[0109] In embodiments of the present invention, the amount of sulfiding agent used in the copper oxide scavenging process is 200g / t to 2000g / t, the amount of collector is 15g / t to 200g / t, and the amount of foaming agent is less than 30g / t.

[0110] In some embodiments of the present invention, the collector added in the copper oxide flotation includes pentyl xanthate and / or butyl xanthate.

[0111] In some embodiments of the present invention, the foaming agent added during the copper oxide flotation includes pine oil.

[0112] In some embodiments of the present invention, the sulfiding agent added during the copper oxide flotation includes sodium hydrosulfide and / or sodium sulfide.

[0113] In an embodiment of the present invention, the magnetic separation includes magnetic roughing and magnetic cleaning, wherein the concentrate from the magnetic roughing is fed into the magnetic cleaning process, and the concentrate from the magnetic cleaning process is magnetically separated concentrate.

[0114] In an embodiment of the present invention, the field strength used for magnetic coarse separation is 0.8T~1.5T.

[0115] In an embodiment of the present invention, the field strength used for magnetic selection is 0.8T~1.5T.

[0116] In some embodiments of the present invention, the tailings from the magnetic coarsening are the final tailings.

[0117] In some embodiments of the present invention, the tailings from the magnetic refining process are the final tailings.

[0118] In an embodiment of the present invention, the copper sulfide flotation C includes copper sulfide roughing C, copper sulfide cleaning C, and copper sulfide scavenging C: the obtained raw ore slurry C is subjected to copper sulfide roughing C to obtain copper sulfide rough concentrate C and copper sulfide roughing tailings C; the copper sulfide rough concentrate C is subjected to copper sulfide cleaning C to obtain copper sulfide concentrate C and copper sulfide cleaning tailings C; the copper sulfide roughing tailings C is subjected to copper sulfide scavenging C to obtain copper sulfide scavenging concentrate C and copper sulfide scavenging tailings C; the copper sulfide cleaning tailings C and / or copper sulfide scavenging concentrate C are returned to copper sulfide roughing C; the copper sulfide scavenging tailings C are sulfur beneficiation tailings.

[0119] In an embodiment of the present invention, a sulfiding agent, a collector, and a frother are added to the copper sulfide flotation C.

[0120] In an embodiment of the present invention, the amount of sulfiding agent used in the copper sulfide flotation C is less than 200 g / t, the amount of collector is 50 g / t to 400 g / t, and the amount of frother is 10 g / t to 60 g / t.

[0121] In some embodiments of the present invention, the sulfiding agent added to the copper sulfide flotation C includes sodium hydrosulfide and / or sodium sulfide.

[0122] In some embodiments of the present invention, the collector added to the copper sulfide flotation C includes pentyl xanthate and / or butyl xanthate.

[0123] In some embodiments of the present invention, the frother added to the copper sulfide flotation C includes pine oil.

[0124] In some embodiments of the present invention, the sulfiding agent, collector and frother in copper sulfide flotation C are added in the roughing stage of copper sulfide flotation C.

[0125] In an embodiment of the present invention, the copper sulfide roughing C includes one or more stages; the concentrate from each stage of copper sulfide roughing C is the copper sulfide rough concentrate C, the tailings from the last stage of copper sulfide roughing C is the copper sulfide roughing tailings C, and the tailings from other stages of copper sulfide roughing C are sent to the next stage of operation.

[0126] In an embodiment of the present invention, the copper sulfide beneficiation C includes one or more stages; the concentrate of the last stage of copper sulfide beneficiation C is the copper sulfide concentrate C, and the concentrates of other stages of copper sulfide beneficiation C are sent to the next stage of operation; the tailings of the first stage of copper sulfide beneficiation C are the copper sulfide beneficiation tailings C, and the tailings of other stages of copper sulfide beneficiation C are returned to the previous stage of operation.

[0127] In some embodiments of the present invention, the copper sulfide is selected from C at a grade of 2 to 4.

[0128] In an embodiment of the present invention, the copper sulfide scavenging C includes one or more stages; the concentrate from each stage of copper sulfide scavenging C is the copper sulfide scavenging concentrate C, the tailings from the last stage of copper sulfide scavenging C is the copper sulfide scavenging tailings C, and the tailings from other stages of copper sulfide scavenging C are sent to the next stage of operation.

[0129] Leaching tests can be conducted on copper oxide concentrate 1, copper oxide concentrate 2, copper oxide concentrate 3, and magnetic separation concentrate. Based on the acid consumption, it can be determined whether the corresponding concentrate should be leached by wet leaching or neutralized with the raffinate obtained from smelting leaching, so as to maximize the benefits.

[0130] Example The following examples describe the disclosure of this invention in more detail. These examples are merely illustrative, as various modifications and variations will be apparent to those skilled in the art within the scope of this disclosure. Unless otherwise stated, all parts, percentages, and ratios reported in the following examples are based on weight. Unless otherwise stated, all reagents used in the examples are available commercially or synthesized using conventional methods and are ready for use without further processing. Unless otherwise stated, all instruments used in the examples are available commercially.

[0131] Example 1 The raw ore is divided into fine-grained disseminated sulfur-oxygen mixed copper-cobalt ore and refractory sulfur-oxygen mixed copper-cobalt ore. The fine-grained disseminated sulfur-oxygen mixed copper-cobalt ore involved in this embodiment has copper and cobalt grades of 3.29 wt% and 0.09 wt%, respectively, and the copper sulfide content in the copper-bearing minerals is 70 wt%. In the fine-grained disseminated sulfur-oxygen mixed copper-cobalt ore, the particle size of the copper sulfide minerals is within 30 μm.

[0132] The process flow of this embodiment is as follows: Figure 1 , Figure 2 As shown, the specific situation is as follows: (1) Grinding: Fine-grained disseminated copper-cobalt ore with sulfur and oxygen is ground. Sulfidating agent (sodium hydrosulfide, 100 g / t) and collector (butyl xanthate, 140 g / t) are added during the grinding process. The fineness of the raw ore pulp is: -0.074 mm accounts for 71 wt%, and the pulp concentration is 37 wt%. (2) The obtained raw ore slurry is subjected to copper sulfide roughing to obtain copper sulfide rough concentrate and copper sulfide roughing tailings: The copper sulfide roughing process consists of two stages; the concentrate from each stage of the copper sulfide roughing process is called the copper sulfide rough concentrate, and the tailings from the second stage of the copper sulfide roughing process are called the copper sulfide roughing tailings. The tailings from the first stage of the copper sulfide roughing process are fed into the second stage of the copper sulfide roughing process. Foaming agent (pine oil, dosage 50g / t) is added to the first stage of copper sulfide roughing. The second stage of copper sulfide roughing involves the addition of a collector (butyl xanthate, 10 g / t) and a frother (pine oil, 5 g / t). (3) The copper sulfide rough concentrate is subjected to copper sulfide beneficiation to obtain copper sulfide concentrate and copper sulfide beneficiation tailings: The copper sulfide beneficiation process is divided into four stages; the concentrate from the final stage of copper sulfide beneficiation is called copper sulfide concentrate, and the concentrates from other stages of copper sulfide beneficiation are sent to the next stage of operation; the tailings from the first stage of copper sulfide beneficiation are called copper sulfide beneficiation tailings, and the tailings from other stages of copper sulfide beneficiation are returned to the previous stage of operation. (4) The copper sulfide roughing tailings are subjected to copper sulfide scavenging to obtain copper sulfide scavenging concentrate and copper sulfide scavenging tailings: The copper sulfide scavenging is a primary process, the resulting concentrate is the copper sulfide scavenging concentrate, and the resulting tailings are the copper sulfide scavenging tailings. The copper sulfide scavenging process involves the addition of a collector (butyl xanthate, 10 g / t) and a frother (pine oil, 5 g / t). (5) The copper sulfide tailings and copper sulfide scavenging concentrate are regrinded and then subjected to reflotation to obtain copper oxide concentrate 1, copper oxide concentrate 2 and reflotation tailings: The regrinding of the copper sulfide tailings and copper sulfide scavenging concentrate involves hydrocyclone classification to refine the large-sized sand particles. In the regrinded slurry, particles with a size of -0.074 mm account for 90 wt%, and the slurry concentration is 28 wt%. The refractory slurry is subjected to copper sulfide roughing B, copper sulfide scavenging B, copper oxide roughing B, and copper oxide scavenging B in sequence according to the process flow. Each of these processes is a first stage. The tailings obtained from copper oxide scavenging B are the reflotation tailings, and the tailings from the other stages of flotation are sent to the next stage. The concentrates from copper sulfide roughing B and copper sulfide scavenging B are sent to copper sulfide cleaning. The concentrate from copper oxide roughing B is copper oxide concentrate 1, and the concentrate from copper oxide scavenging B is copper oxide concentrate 2. The sulfiding agents used in the re-flotation include sodium hydrosulfide and / or sodium sulfide; the foaming agents used include pine oil; the collectors used include a combination of pentyl xanthate and Z200 in a mass ratio of 1:2; and the depressants used include a combination of carboxymethyl cellulose and sodium hexametaphosphate in a mass ratio of 1:2. Collector (15 g / t) and frother (10 g / t) are added to copper sulfide roughing agent B. Add collector (5g / t) to copper sulfide scavenging B; Add inhibitor (500g / t), sulfiding agent (500g / t), collector (10g / t) and foaming agent (5g / t) to copper oxide roughing process B. Add inhibitor (200g / t), sulfiding agent (250g / t), and collector (5g / t) to copper oxide scavenging B. (6) The copper sulfide scavenging tailings are subjected to copper oxide flotation to obtain copper oxide rough concentrate, copper oxide concentrate 3 and copper oxide flotation tailings: The copper oxide flotation process includes copper oxide roughing and copper oxide scavenging in sequence. Each of the copper oxide roughing and copper oxide scavenging processes consists of two stages. The tailings obtained from the last stage of the copper oxide flotation process are the copper oxide flotation tailings, and the tailings from other stages of flotation are sent to the next stage of operation. The concentrates from each stage of copper oxide roughing are combined to form the copper oxide rough concentrate. The concentrates from each stage of copper oxide scavenging are combined to form the copper oxide concentrate 3. In the first stage of copper oxide roughing, a sulfiding agent (sodium hydrosulfide, 1000 g / t), a collector (butyl xanthate, 100 g / t), and a foaming agent (pine oil, 10 g / t) are added. In the second stage of copper oxide roughing, a sulfiding agent (sodium hydrosulfide, dosage 500g / t) and a collector (butyl xanthate, dosage 40g / t) are added. In the first stage of copper oxide scavenging, a sulfiding agent (sodium hydrosulfide, 500 g / t), a collector (butyl xanthate, 40 g / t), and a foaming agent (pine oil, 5 g / t) are added. In the second stage of copper oxide scavenging, a sulfiding agent (sodium hydrosulfide, dosage 200g / t) and a collector (butyl xanthate, dosage 20g / t) are added. (7) The reflotation tailings and / or copper oxide flotation tailings are subjected to magnetic separation to obtain magnetic concentrate: The magnetic separation includes a first-stage magnetic roughing and a first-stage magnetic cleaning, using a high-gradient magnetic separator. The concentrate from the magnetic roughing is fed into the magnetic cleaning process, and the concentrate from the magnetic cleaning process is the magnetic concentrate. The field strength of both the magnetic roughing and magnetic cleaning processes is 1.1T. The tailings obtained from the magnetic roughing and magnetic cleaning processes are combined to form the final tailings.

[0133] Following the processing described in this embodiment, valuable metals in the finely disseminated sulfide-oxygen mixed copper-cobalt ore are enriched in copper sulfide concentrate, copper oxide rough concentrate, copper oxide concentrate 1, copper oxide concentrate 2, copper oxide concentrate 3, and magnetic separation concentrate. The copper sulfide concentrate is further processed using a conventional roasting-leaching method. Leaching tests were conducted on the remaining concentrate products. Preliminary results indicate that the acid consumption per ton of copper in the copper oxide rough concentrate is relatively low, approximately 2 tons of acid per ton of copper. The acid consumption per ton of copper in copper oxide concentrate 1, copper oxide concentrate 2, and copper oxide concentrate 3 is approximately 3 tons of acid per ton of copper, 21 tons of acid per ton of copper, and 20 tons of acid per ton of copper, respectively. The acid consumption for the magnetic separation concentrate is 14 tons of acid per ton of copper. Based on cost-benefit analysis, copper oxide crude concentrate and copper oxide concentrate 1 are directly leached together with refractory sulfur-oxygen mixed copper-cobalt ore. Copper oxide concentrate 2, copper oxide concentrate 3 and magnetically separated concentrate are fed to the three-stage leaching process for neutralization. The residual acid in the raffinate is used to leach the target minerals in the concentrates. No additional sulfuric acid is required. The leaching rate is about 50%, and a large amount of lime can be saved.

[0134] Comparative Example 1 This comparative example uses the same ore as in Example 1.

[0135] In comparison, this comparative example does not include the reflotation described in Example 1. The resulting copper sulfide tailings and copper sulfide scavenging concentrate are returned to the first-stage copper sulfide roughing process. Other processes and reagent usage are consistent with Example 1. The specific process flow of Comparative Example 1 is as follows: Figure 3 , Figure 4 As shown.

[0136] After the comparative treatment, the valuable metals in the finely impregnated sulfur-oxygen mixed copper-cobalt ore were enriched in copper sulfide concentrate, copper oxide rough concentrate, copper oxide scavenging concentrate (corresponding to copper oxide concentrate 3 in Example 1) and magnetic separation concentrate.

[0137] The experimental results of Example 1 and Comparative Example 1 are shown in Table 1. In the table, high-grade copper oxide concentrate refers to copper oxide concentrate 1 and copper oxide rough concentrate, and low-grade copper oxide concentrate refers to copper oxide concentrate 2 and copper oxide concentrate 3 (copper oxide scavenging concentrate). As can be seen from Table 1, compared with Comparative Example 1, the total copper recovery rate increased by 1.74 percentage points using the process flow of Example 1; the recovery rate of copper sulfide concentrate increased significantly, by 5.68 percentage points compared with Comparative Example 1; the recovery rates of high-grade copper oxide concentrate, low-grade copper oxide concentrate, and magnetic separation concentrate decreased by 3.08, 0.68, and 0.18 percentage points respectively compared with the comparative example; the acid consumption of copper sulfide roasted sand was very low and negligible. Increasing the recovery rate of copper sulfide concentrate and decreasing the corresponding recovery rate of copper oxide concentrate can significantly reduce acid consumption.

[0138] It is evident that the process of this invention can improve the liberation degree of fine-grained disseminated sulfur-oxygen mixed copper-cobalt ore, enhance the separation effect of the sulfidation stage, and simultaneously improve the total copper recovery rate. Furthermore, in Example 1, the leaching acid consumption for high-grade copper oxide, low-grade copper oxide, and magnetic concentrate was 2.08 t / tcu, 20.36 t / tcu, and 14.36 t / tcu, respectively, with leaching rates based on slag of 92.25%, 85.27%, and 78.85%. In Comparative Example 1, the leaching acid consumption for high-grade copper oxide, low-grade copper oxide, and magnetic concentrate was 2.46 t / tcu, 20.42 t / tcu, and 13.98 t / tcu, respectively, with leaching rates based on slag of 89.23%, 85.51%, and 78.36%.

[0139] This invention reduces the intermingling of copper sulfide and copper oxide concentrates, slightly increases the leaching rate of high-grade copper oxide concentrate, slightly reduces acid consumption per ton of copper, and slightly improves the quality of high-grade copper oxide concentrate; the leaching rates and acid consumption of low-grade copper oxide and magnetic separation concentrates are basically equivalent. More cobalt enters the tailings, which is beneficial for subsequent cobalt recovery from the tailings.

[0140] Table 1. Results of mineral processing tests in Example 1 and Comparative Example 1

[0141] Example 2 The raw ore is divided into fine-grained disseminated sulfur-oxygen mixed copper-cobalt ore and refractory sulfur-oxygen mixed copper-cobalt ore. The fine-grained disseminated sulfur-oxygen mixed copper-cobalt ore involved in this embodiment has copper and cobalt grades of 2.45 wt% and 0.07 wt%, respectively, and the copper sulfide content in the copper-bearing minerals is 50 wt%. In the fine-grained disseminated sulfur-oxygen mixed copper-cobalt ore, the particle size of the copper sulfide minerals is within 30 μm.

[0142] The specific process flow of this embodiment is as follows: (1) Grinding: Fine-grained disseminated copper-cobalt ore with sulfur and oxygen is ground. Sulfidating agent (sodium hydrosulfide, dosage 90g / t) and collector (butyl xanthate, dosage 130g / t) are added during the grinding process. The fineness of the raw ore pulp is: -0.074mm accounts for 70wt%, and the pulp concentration is 35wt%. (2) The obtained raw ore slurry is subjected to copper sulfide roughing to obtain copper sulfide rough concentrate and copper sulfide roughing tailings: The copper sulfide roughing process consists of two stages; the concentrate from each stage of the copper sulfide roughing process is called the copper sulfide rough concentrate, and the tailings from the second stage of the copper sulfide roughing process are called the copper sulfide roughing tailings. The tailings from the first stage of the copper sulfide roughing process are fed into the second stage of the copper sulfide roughing process. Foaming agent (pine oil, dosage 35g / t) is added to the first stage of copper sulfide roughing. The second stage of copper sulfide roughing involves the addition of a collector (butyl xanthate, 5 g / t) and a frother (pine oil, 5 g / t). (3) The copper sulfide rough concentrate is subjected to copper sulfide beneficiation to obtain copper sulfide concentrate and copper sulfide beneficiation tailings: The copper sulfide beneficiation process is divided into four stages; the concentrate from the final stage of copper sulfide beneficiation is called copper sulfide concentrate, and the concentrates from other stages of copper sulfide beneficiation are sent to the next stage of operation; the tailings from the first stage of copper sulfide beneficiation are called copper sulfide beneficiation tailings, and the tailings from other stages of copper sulfide beneficiation are returned to the previous stage of operation. (4) The copper sulfide roughing tailings are subjected to copper sulfide scavenging to obtain copper sulfide scavenging concentrate and copper sulfide scavenging tailings: The copper sulfide scavenging is a primary process, the resulting concentrate is the copper sulfide scavenging concentrate, and the resulting tailings are the copper sulfide scavenging tailings. The copper sulfide scavenging process involves the addition of a collector (butyl xanthate, 10 g / t) and a frother (pine oil, 5 g / t). (5) The copper sulfide tailings and copper sulfide scavenging concentrate are regrinded and then subjected to reflotation to obtain copper oxide concentrate 1, copper oxide concentrate 2 and reflotation tailings: The regrinding of the copper sulfide tailings and copper sulfide scavenging concentrate involves hydrocyclone classification to refine the large-sized sand particles. In the regrinded slurry, particles with a size of -0.074 mm account for 90 wt%, and the slurry concentration is 25 wt%. The refractory slurry is subjected to copper sulfide roughing B, copper sulfide scavenging B, copper oxide roughing B, and copper oxide scavenging B in sequence according to the process flow. Each of these processes is a first stage. The tailings obtained from copper oxide scavenging B are the reflotation tailings, and the tailings from the other stages of flotation are sent to the next stage. The concentrates from copper sulfide roughing B and copper sulfide scavenging B are sent to copper sulfide cleaning. The concentrate from copper oxide roughing B is copper oxide concentrate 1, and the concentrate from copper oxide scavenging B is copper oxide concentrate 2. The sulfiding agent used in the re-flotation includes sodium hydrosulfide and / or sodium sulfide; the foaming agent used includes pine oil; the collector used includes a combination of pentyl xanthate and Z200 in a mass ratio of 1:3; the depressant used includes a combination of carboxymethyl cellulose and sodium hexametaphosphate in a mass ratio of 1:3. Collector (15 g / t) and frother (5 g / t) are added to copper sulfide roughing agent B. Add collector (5g / t) to copper sulfide scavenging B; In the copper oxide roughing process B, an inhibitor (700 g / t), a sulfiding agent (1200 g / t), a collector (25 g / t), and a foaming agent (5 g / t) are added. Add inhibitor (300g / t), sulfiding agent (700g / t), and collector (10g / t) to copper oxide scavenging B. (6) The copper sulfide scavenging tailings are subjected to copper oxide flotation to obtain copper oxide rough concentrate, copper oxide concentrate 3 and copper oxide flotation tailings: The copper oxide flotation process includes copper oxide roughing and copper oxide scavenging in sequence. Each of the copper oxide roughing and copper oxide scavenging processes consists of two stages. The tailings obtained from the last stage of the copper oxide flotation process are the copper oxide flotation tailings, and the tailings from other stages of flotation are sent to the next stage of operation. The concentrates from each stage of copper oxide roughing are combined to form the copper oxide rough concentrate. The concentrates from each stage of copper oxide scavenging are combined to form the copper oxide concentrate 3. In the first stage of copper oxide roughing, a sulfiding agent (sodium hydrosulfide, 1300 g / t), a collector (butyl xanthate, 60 g / t), and a foaming agent (pine oil, 10 g / t) are added. In the second stage of copper oxide roughing, a sulfiding agent (sodium hydrosulfide, dosage 600g / t) and a collector (butyl xanthate, dosage 30g / t) are added. In the first stage of copper oxide scavenging, a sulfiding agent (sodium hydrosulfide, 600 g / t), a collector (butyl xanthate, 30 g / t), and a foaming agent (pine oil, 5 g / t) are added. In the second stage of copper oxide scavenging, a sulfiding agent (sodium hydrosulfide, dosage 400g / t) and a collector (butyl xanthate, dosage 20g / t) are added. (7) The reflotation tailings and / or copper oxide flotation tailings are subjected to magnetic separation to obtain magnetic concentrate: The magnetic separation includes a first-stage magnetic roughing and a first-stage magnetic cleaning, using a high-gradient magnetic separator. The concentrate from the magnetic roughing is fed into the magnetic cleaning process, and the concentrate from the magnetic cleaning process is the magnetic concentrate. The field strength of both the magnetic roughing and magnetic cleaning processes is 1.2T. The tailings obtained from the magnetic roughing and magnetic cleaning processes are combined to form the final tailings.

[0143] Following the processing described in this embodiment, valuable metals in the finely disseminated sulfide-oxygen mixed copper-cobalt ore are enriched in copper sulfide concentrate, copper oxide rough concentrate, copper oxide concentrate 1, copper oxide concentrate 2, copper oxide concentrate 3, and magnetic separation concentrate. The copper sulfide concentrate is further processed using a conventional roasting-leaching method. Leaching tests were conducted on the remaining concentrate products. The tests showed that the acid consumption per ton of copper in the copper oxide rough concentrate is approximately 2 tons of acid per ton of copper; the acid consumption per ton of copper in copper oxide concentrate 1, copper oxide concentrate 2, and copper oxide concentrate 3 is 3 tons of acid per ton of copper, 16 tons of acid per ton of copper, and 15 tons of acid per ton of copper, respectively; and the acid consumption per ton of copper in the magnetic separation concentrate is 12 tons of acid per ton of copper. Based on cost-benefit analysis, copper oxide crude concentrate and copper oxide concentrate 1 are directly leached together with refractory sulfur-oxygen mixed copper-cobalt ore. Copper oxide concentrate 2, copper oxide concentrate 3 and magnetically separated concentrate are fed to the three-stage leaching process for neutralization. The residual acid in the raffinate is used to leach the target minerals in the concentrates without the need for additional sulfuric acid. The leaching rate is about 52%, and a large amount of lime can be saved.

[0144] Comparative Example 2 This comparative example uses the same ore as in Example 1.

[0145] In comparison, this comparative example does not include the reflotation described in Example 2. The resulting copper sulfide tailings and copper sulfide scavenging concentrate are returned to the first-stage copper sulfide roughing process. Other processes and reagent usage are the same as in Example 2.

[0146] After the comparative treatment, the valuable metals in the finely impregnated sulfur-oxygen mixed copper-cobalt ore are enriched in copper sulfide concentrate, copper oxide rough concentrate, copper oxide scavenging concentrate (corresponding to copper oxide concentrate 3 in Example 2) and magnetic separation concentrate.

[0147] The experimental results of Example 2 and Comparative Example 2 are shown in Table 2. In the table, high-grade copper oxide concentrate refers to copper oxide concentrate 1 and copper oxide rough concentrate, and low-grade copper oxide concentrate refers to copper oxide concentrate 2 and copper oxide concentrate 3 (copper oxide scavenging concentrate). As shown in Table 1, compared with Comparative Example 1, the total copper recovery rate of the process using Example 1 increased by 1.33 percentage points; the recovery rate of copper sulfide concentrate increased significantly, by 3.34 percentage points; the recovery rates of high-grade copper oxide concentrate, low-grade copper oxide concentrate, and magnetic separation concentrate decreased by 1.64, 0.29, and 0.08 percentage points, respectively, compared with the comparative example; the acid consumption of copper sulfide roasted sand was very low and negligible. Increasing the recovery rate of copper sulfide concentrate and decreasing the corresponding recovery rate of copper oxide concentrate can significantly reduce acid consumption.

[0148] It is evident that the process of this invention can improve the liberation degree of fine-grained disseminated sulfur-oxygen mixed copper-cobalt ore, enhance the separation effect of the sulfidation stage, and simultaneously improve the total copper recovery rate. Furthermore, in Example 2, the leaching acid consumption for high-grade copper oxide, low-grade copper oxide, and magnetic concentrate was 1.77 t / tcu, 16.06 t / tcu, and 12.31 t / tcu, respectively, with leaching rates based on slag of 93.22%, 86.75%, and 79.56%. In Comparative Example 2, the leaching acid consumption for high-grade copper oxide, low-grade copper oxide, and magnetic concentrate was 1.83 t / tcu, 15.74 t / tcu, and 12.46 t / tcu, respectively, with leaching rates based on slag of 91.12%, 86.87%, and 79.33%.

[0149] The process of this invention reduces the intermingling of copper sulfide and copper oxide concentrates, slightly increases the leaching rate of high-grade copper oxide concentrate, maintains a relatively constant acid consumption per ton of copper, and slightly improves the quality of high-grade copper oxide concentrate; the leaching rates and leaching acid consumption of low-grade copper oxide and magnetic separation concentrate are basically the same.

[0150] Table 2. Results of mineral processing tests in Example 2 and Comparative Example 2

[0151] Example 3 The ore involved in this embodiment is the refractory sulfide-oxygen mixed copper-cobalt ore portion remaining after the raw ore in Example 1 was divided into fine-grained disseminated sulfur-oxygen mixed copper-cobalt ore and refractory sulfur-oxygen mixed copper-cobalt ore. Its copper and cobalt grades are 3.40 wt% and 0.20 wt%, respectively, and the copper sulfide content in the copper-bearing minerals is 20 wt%.

[0152] The process flow of this embodiment is as follows: Figure 5 As shown, the specific situation is as follows: (1) The refractory sulfur-oxygen mixed copper-cobalt ore was ground to obtain raw ore slurry C; the fineness of the obtained raw ore slurry C was: -0.074 mm accounted for 72 wt%, and the slurry concentration was 30 wt%; (2) The obtained raw ore slurry C is subjected to copper sulfide roughing C to obtain copper sulfide rough concentrate C and copper sulfide roughing tailings C; the copper sulfide roughing C is a first stage; the obtained concentrate is the copper sulfide rough concentrate C, and the obtained tailings are the copper sulfide roughing tailings C. The copper sulfide roughing process C includes the addition of a collector (butyl xanthate, dosage 80 g / t) and a frother (pine oil, dosage 25 g / t). (3) The copper sulfide rough concentrate C is subjected to copper sulfide beneficiation C to obtain copper sulfide concentrate C and copper sulfide beneficiation tailings C; the copper sulfide beneficiation C is three-stage; the concentrate of the last stage of copper sulfide beneficiation C is the copper sulfide concentrate C, and the concentrates of other stages of copper sulfide beneficiation C are sent to the next stage of operation; the tailings of the first stage of copper sulfide beneficiation C are the copper sulfide beneficiation tailings C, and the tailings of other stages of copper sulfide beneficiation C are returned to the previous stage of operation; the copper sulfide beneficiation tailings C is returned to the copper sulfide roughing C; (4) The copper sulfide roughing tailings C are subjected to copper sulfide scavenging C to obtain copper sulfide scavenging concentrate C and copper sulfide scavenging tailings C; the copper sulfide scavenging C is a first stage; the concentrate of each stage of copper sulfide scavenging C is the copper sulfide scavenging concentrate C, the tailings of the last stage of copper sulfide scavenging C is the copper sulfide scavenging tailings C, and the tailings of other stages of copper sulfide scavenging C are sent to the next stage of operation; the copper sulfide scavenging concentrate C is returned to the copper sulfide roughing C; the copper sulfide scavenging tailings C is sulfur beneficiation tailings.

[0153] The obtained copper sulfide concentrate C was roasted and then wet leached, and the sulfur tailings were also wet leached.

[0154] Comparative Example 3 This comparative example uses the same refractory sulfur-oxygen mixed copper-cobalt ore as Example 3, but employs a process similar to that used in Example 1 for treating fine-grained disseminated sulfur-oxygen mixed copper-cobalt ore. The specific details are as follows: (1) Grinding: The difficult-to-process sulfur-oxygen mixed copper-cobalt ore is ground, which is basically the same as the grinding process in Example 1, except that the amount of sodium hydrosulfide is changed to 80g / t and the amount of butyl xanthate is changed to 25g / t. (2) Copper sulfide roughing: The process is basically the same as that of copper sulfide roughing in Example 1, except that the amount of pine oil used in the first stage of copper sulfide roughing is 25 g / t; the amount of butyl xanthate used in the second stage of copper sulfide roughing is 5 g / t and pine oil is 2 g / t. (3) Copper sulfide refining: The copper sulfide refining process is the same as that in Example 1; (4) Copper sulfide scavenging: The copper sulfide scavenging process is basically the same as that in Example 1, except that the amount of butyl xanthate used in copper sulfide scavenging is 5g / t and the amount of pine oil used is 2g / t. (5) Regrinding and reflotation: The regrinding and reflotation process is basically the same as that in Example 1, except that 10 g / t of collector and 3 g / t of frother are added to copper sulfide roughing B; 5 g / t of collector is added to copper sulfide scavenging B; 300 g / t of inhibitor, 500 g / t of sulfidant, 5 g / t of collector and 2 g / t of frother are added to copper oxide roughing B; and 100 g / t of inhibitor, 150 g / t of sulfidant and 5 g / t of collector are added to copper oxide scavenging B. (6) Copper oxide flotation: The process is basically the same as that in Example 1, except that the amount of sodium hydrosulfide used in the first stage roughing of copper oxide is 1500 g / t, the amount of butyl xanthate is 150 g / t, and the amount of pine oil is 20 g / t; the amount of sodium hydrosulfide used in the second stage roughing of copper oxide is 1000 g / t, the amount of butyl xanthate is 80 g / t, and the amount of pine oil is 5 g / t; the amount of sodium hydrosulfide used in the first stage scavenging of copper oxide is 800 g / t, the amount of butyl xanthate is 70 g / t, and the amount of pine oil is 5 g / t; the amount of sodium hydrosulfide used in the second stage scavenging of copper oxide is 600 g / t, the amount of butyl xanthate is 50 g / t, and the amount of pine oil is 5 g / t. (7) Magnetic separation: The magnetic separation process is the same as that in Example 1.

[0155] The obtained copper sulfide concentrate was roasted and then leached by wet leaching; the obtained copper oxide crude concentrate, copper oxide concentrate 1, copper oxide concentrate 2, copper oxide concentrate 3, and magnetic separation concentrate were leached by wet leaching. The test results of Example 3 and Comparative Example 3 are shown in Table 3. As can be seen from Table 3, the mineral processing recovery rate of Example 3 is 100% (including sulfur tailings), while the mineral processing recovery rate of Comparative Example 3 is only 63.64%. In addition, the leaching test shows that the acid consumption per ton of copper in Example 3 is only about 3 tons of acid / ton of copper, which is low and economically efficient; while using sulfur first and then oxygen, followed by flotation tailings and then magnetic separation, results in a lower mineral processing recovery rate and a higher metal loss rate.

[0156] Table 3. Results of mineral processing tests in Example 3 and Comparative Example 3

[0157] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A combined process for beneficiating and smelting fine-grained disseminated copper-cobalt sulfide-oxide ores, characterized by, The raw ore is divided into fine-grained disseminated sulfur-oxygen mixed copper-cobalt ore and refractory sulfur-oxygen mixed copper-cobalt ore; in the fine-grained disseminated sulfur-oxygen mixed copper-cobalt ore, the embedded particle size of copper sulfide mineral is within 30 μm; the copper grade of the fine-grained disseminated sulfur-oxygen mixed copper-cobalt ore is 3.5 wt% or more, the content of copper sulfide in copper-containing mineral is 40% or more, or the copper grade is 0.8 wt%-3.5 wt%, and the content of copper sulfide in copper-containing mineral is 20 wt% or more; the copper grade of the refractory sulfur-oxygen mixed copper-cobalt ore is 0.8 wt% or more, and the content of copper sulfide in copper-containing mineral is 20 wt% or less; The fine-grained disseminated sulfur-oxygen mixed copper-cobalt ore is ground to obtain an ore slurry, and a sulfidizing agent and a collector are added during the grinding process; the obtained ore slurry is subjected to copper sulfide roughing to obtain copper sulfide rough concentrate and copper sulfide roughing tailings; the copper sulfide rough concentrate is subjected to copper sulfide cleaning to obtain copper sulfide concentrate and copper sulfide cleaning tailings; the copper sulfide roughing tailings are subjected to copper sulfide scavenging to obtain copper sulfide scavenging concentrate and copper sulfide scavenging tailings; the copper sulfide cleaning tailings and / or the copper sulfide scavenging concentrate are subjected to re-flotation after re-grinding to obtain copper oxide concentrate 1, copper oxide concentrate 2, and re-flotation tailings; the copper sulfide scavenging tailings are subjected to copper oxide flotation to obtain copper oxide rough concentrate, copper oxide concentrate 3, and copper oxide flotation tailings; the re-flotation tailings and / or the copper oxide flotation tailings are subjected to magnetic separation to obtain magnetic separation concentrate; The refractory sulfur-oxygen mixed copper-cobalt ore is ground to obtain ore slurry C; the ore slurry C is subjected to copper sulfide flotation C to obtain copper sulfide concentrate C and sulfur tailings; The obtained copper sulfide concentrate and / or copper sulfide concentrate C is roasted and then subjected to wet leaching; the obtained copper oxide rough concentrate and / or sulfur tailings are subjected to wet leaching; one or more of copper oxide concentrate 1, copper oxide concentrate 2, copper oxide concentrate 3, and magnetic separation concentrate is subjected to wet leaching and / or neutralization with the raffinate obtained by smelting leaching; The particle size of the ore slurry is: the particle size of -0.074 mm accounts for 65 wt%-75 wt%; The particle size of the re-ground ore slurry is: the particle size of -0.074 mm accounts for 80 wt%-98 wt%; The particle size of the ore slurry C is: the particle size of -0.074 mm accounts for 60 wt%-85 wt%.

2. The process for the combined beneficiation and hydrometallurgical extraction of fine grained disseminated sulphidic copper cobalt ores according to claim 1, characterized in that, In the fine-grained disseminated sulfur-oxygen mixed copper-cobalt ore, the copper-containing mineral includes one or more of chalcocite, bornite, chalcopyrite, chervetite, malachite, chrysocolla, blue copper, and red copper; the cobalt-containing mineral includes one or more of hydrocobaltite, cobalt dolomite, chervetite, and cobalt associated with copper minerals; the gangue mineral includes one or more of quartz, dolomite, muscovite, and chlorite.

3. The process for the combined beneficiation and hydrometallurgical extraction of fine grained disseminated sulphidic copper cobalt ores according to claim 1, characterized in that, In the grinding process of the fine-grained disseminated sulfur-oxygen mixed copper-cobalt ore, 30 g / t-300 g / t of a sulfidizing agent and 50 g / t-400 g / t of a collector are added; the particle size of the ore slurry is: the particle size of -0.074 mm accounts for 70 wt%-73 wt%; the pulp concentration of the ore slurry is 32 wt%-38 wt%. The concentration of the regrinding ore pulp is 25wt%-38wt%; the particle size of the regrinding ore pulp is: the particle size of -0.074mm accounts for 85wt%-95wt%; The particle size of the raw ore pulp C is: the particle size of -0.074mm accounts for 65wt%-80wt%; the concentration of the raw ore pulp C is 28wt%-38wt%.

4. The process for the combined beneficiation and extraction of fine-grained disseminated copper-cobalt sulphidic ores according to any one of claims 1 to 3, characterized in that, The copper sulfide roughing includes one or more than two stages; the concentrate of each stage of copper sulfide roughing is the copper sulfide rough concentrate, the tailings of the last stage of copper sulfide roughing is the copper sulfide roughing tailings, and the tailings of other stages of copper sulfide roughing are sent to the next stage; The collector and the frother are added in the copper sulfide roughing; The dosage of the collector in the copper sulfide roughing is 70g / t or less, and the dosage of the frother is 10g / t-140g / t.

5. The process for the combined beneficiation and extraction of fine-grained disseminated copper-cobalt sulphidic ores according to any one of claims 1 to 3, characterized in that, The copper sulfide cleaning includes one or more than two stages; the concentrate of the last stage of copper sulfide cleaning is the copper sulfide concentrate, and the concentrate of other stages of copper sulfide cleaning is sent to the next stage; the tailings of the first stage of copper sulfide cleaning is the copper sulfide cleaning tailings, and the tailings of other stages of copper sulfide cleaning are returned to the previous stage.

6. The process for the combined beneficiation and extraction of fine-grained disseminated copper-cobalt sulphidic ores according to any one of claims 1 to 3, characterized in that, The copper sulfide scavenging includes one or more than two stages; the concentrate of each stage of copper sulfide scavenging is the copper sulfide scavenging concentrate, the tailings of the last stage of copper sulfide scavenging is the copper sulfide scavenging tailings, and the tailings of other stages of copper sulfide scavenging are sent to the next stage; The collector and the frother are added in the copper sulfide scavenging; The dosage of the collector in the copper sulfide scavenging is 50g / t or less, and the dosage of the frother is 10g / t or less.

7. The process for the combined beneficiation and hydrometallurgical extraction of fine-grained disseminated copper-cobalt sulphide ores according to any one of claims 1 to 3, characterized in that, The re-flotation includes copper sulfide roughing B, copper sulfide scavenging B, copper oxide roughing B and copper oxide scavenging B in sequence according to the process sequence; the copper sulfide roughing B, the copper sulfide scavenging B, the copper oxide roughing B and the copper oxide scavenging B each includes one or more than two stages; the tailings of the last stage of the re-flotation is the re-flotation tailings, and the tailings of other stages are sent to the next stage; The concentrate of the copper sulfide roughing B is sent to the copper sulfide cleaning; The concentrate of the copper sulfide scavenging B is sent to the copper sulfide cleaning; The concentrate of the copper oxide roughing B is the copper oxide concentrate 1; The concentrate of the copper oxide scavenging B is the copper oxide concentrate 2; The collector and the frother are added in the copper sulfide roughing B; The dosage of the collector in the copper sulfide roughing B is 5g / t-100g / t, and the dosage of the frother is 5g / t-50g / t; The collector and the frother are added in the copper sulfide scavenging B; The dosage of the collector in the copper sulfide scavenging B is 40g / t or less, and the dosage of the frother is 10g / t or less; The depressant, the sulfidizing agent, the collector and the frother are added in the copper oxide roughing B; The dosage of the depressant in the copper oxide roughing B is 100g / t-1500g / t, the dosage of the sulfidizing agent is 200g / t-3000g / t, the dosage of the collector is 5g / t-50g / t, and the dosage of the frother is 20g / t or less; The depressant, the sulfidizing agent, the collector and the frother are added in the copper oxide scavenging B; The dosage of the depressant in the copper oxide scavenging B is 100g / t-1500g / t, the dosage of the sulfidizing agent is 200g / t-3000g / t, the dosage of the collector is 5g / t-50g / t, and the dosage of the frother is 20g / t or less. The inhibitor used in the copper oxide scavenging B is in an amount of 30g / t-700g / t, the sulfidizing agent is in an amount of 100g / t-1500g / t, the collector is in an amount of 30g / t or less, and the frother is in an amount of 10g / t or less; The collector used in the re-flotation includes a combination of pentyl xanthate and Z200 in a mass ratio of 1:1-3; The inhibitor used in the re-flotation includes a combination of carboxymethyl cellulose and sodium hexametaphosphate in a mass ratio of 1:1-4.

8. The process for the combined beneficiation and hydrometallurgical extraction of fine-grained disseminated copper-cobalt sulphide ores according to any one of claims 1 to 3, characterized in that, The copper oxide flotation includes, in sequence according to the flow, copper oxide roughing and copper oxide scavenging; the copper oxide roughing and the copper oxide scavenging each include one or more than two stages; the tailings obtained in the last stage of the copper oxide flotation are the copper oxide flotation tailings, and the tailings of each stage are sent to the next stage; The concentrate of each stage of the copper oxide roughing is the copper oxide rough concentrate; The concentrate of each stage of the copper oxide scavenging is the copper concentrate 3; The sulfidizing agent, the collector and the frother are added in the copper oxide roughing; The sulfidizing agent is in an amount of 650g / t-5500g / t, the collector is in an amount of 60g / t-550g / t, and the frother is in an amount of 10g / t-50g / t in the copper oxide roughing; The sulfidizing agent, the collector and the frother are added in the copper oxide scavenging; The sulfidizing agent is in an amount of 200g / t-2000g / t, the collector is in an amount of 15g / t-200g / t, and the frother is in an amount of 30g / t or less in the copper oxide scavenging.

9. The process for the combined beneficiation and hydrometallurgical extraction of fine-grained disseminated copper-cobalt sulphide ores according to any one of claims 1 to 3, characterized in that, The magnetic separation includes magnetic roughing and magnetic cleaning, the concentrate of the magnetic roughing is sent to the magnetic cleaning, and the concentrate of the magnetic cleaning is the magnetic separation concentrate; the field strength used in the magnetic roughing is 0.8T-1.5T; the field strength used in the magnetic cleaning is 0.8T-1.5T.

10. The process for the combined beneficiation and hydrometallurgical extraction of fine particulate disseminated copper-cobalt sulphide ores according to any one of claims 1 to 3, characterized in that, The copper sulfide flotation C includes copper sulfide roughing C, copper sulfide cleaning C and copper sulfide scavenging C; the obtained raw ore slurry C is subjected to copper sulfide roughing C to obtain copper sulfide rough concentrate C and copper sulfide roughing tailings C; the copper sulfide rough concentrate C is subjected to copper sulfide cleaning C to obtain copper sulfide concentrate C and copper sulfide cleaning tailings C; the copper sulfide roughing tailings C is subjected to copper sulfide scavenging C to obtain copper sulfide scavenging concentrate C and copper sulfide scavenging tailings C; the copper sulfide cleaning tailings C and / or the copper sulfide scavenging concentrate C is returned to the copper sulfide roughing C; the copper sulfide scavenging tailings C is the sulfur separation tailings; The sulfidizing agent, the collector and the frother are added in the copper sulfide flotation C; The sulfidizing agent is in an amount of 200g / t or less, the collector is in an amount of 50g / t-400g / t, and the frother is in an amount of 10g / t-60g / t in the copper sulfide flotation C; The copper sulfide roughing C includes one or more than two stages; the concentrate of each stage of the copper sulfide roughing C is the copper sulfide rough concentrate C, the tailings of the last stage of the copper sulfide roughing C is the copper sulfide roughing tailings C, and the tailings of each stage of the copper sulfide roughing C is sent to the next stage. The copper sulphide cleaning C includes one or more than two stages; the concentrate of the last stage of copper sulphide cleaning C is the copper sulphide concentrate C, and the concentrate of each stage of copper sulphide cleaning C is sent to the next stage; the tailings of the first stage of copper sulphide cleaning C is the copper sulphide cleaning tailings C, and the tailings of each stage of copper sulphide cleaning C is returned to the previous stage. The copper sulphide scavenging C includes one or more than two stages; the concentrate of each stage of copper sulphide scavenging C is the copper sulphide scavenging concentrate C, the tailings of the last stage of copper sulphide scavenging C is the copper sulphide scavenging tailings C, and the tailings of each stage of copper sulphide scavenging C is sent to the next stage.

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