A comprehensive recovery method for copper-molybdenum ore containing copper oxide

Abstract

A comprehensive recovery method for copper-molybdenum ore containing copper oxide. First, the copper and molybdenum minerals in the ore are subjected to bulk flotation to produce a copper-molybdenum bulk concentrate and tailings. The copper-molybdenum bulk concentrate is acid-leached to leach out the copper oxide minerals in the bulk concentrate. The leachate is processed through extraction and electrowinning to produce electrolytic copper. The leached residue contains the remaining copper-molybdenum sulfide minerals, which are subjected to copper-molybdenum flotation separation after cleaning, dewatering, pulp adjustment, acid-base neutralization, and re-grinding to produce copper concentrate and molybdenum concentrate. The present invention adopts a method combining flotation and hydrometallurgy, and finally produces cathode copper, copper concentrate, and molybdenum concentrate, solving the problem of effective recovery of copper oxide molybdenum ore.

Description

Technical Field

[0001] The present invention relates to the technical field of ore dressing, and specifically to a comprehensive recovery method for copper-molybdenum ore containing copper oxide. Background Art

[0002] Copper and molybdenum are important non-ferrous metals, which are widely used in fields such as machinery, medicine, and chemical industry. Deposits with copper as the main component and molybdenum as an associated element are the main sources of copper and molybdenum metals. Copper-molybdenum deposits generally have low grades and are difficult to beneficiate and separate. Especially when copper minerals in the deposit are oxidized due to geological reasons, due to reasons such as high slime content, large differences in mineral floatability, activation of copper sulfide minerals, and difficulty in inhibiting some copper oxide minerals, it is difficult to separate copper and molybdenum in ore dressing, the beneficiation indexes are poor, the economic benefits are low, and they are often stockpiled for treatment, resulting in waste of resources. Therefore, it is very necessary and significant to study how to effectively recover valuable metals in copper oxide-molybdenum ore and develop an efficient recovery method for such ores. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a comprehensive recovery method for copper-molybdenum ore containing copper oxide in view of the shortcomings and deficiencies of the prior art, so as to ensure the comprehensive recovery of such ore resources and obtain better recovery indexes while using this method.

[0004] To achieve the above object, a comprehensive recovery method for copper-molybdenum ore containing copper oxide according to the present invention is characterized by including the following steps: (1) After the raw ore is ground by a mill to a fineness of -0.074 mm occupancy of 60 - 65%, it is mixed and floated by roughing, cleaning, and scavenging with a pH adjuster, a sulfiding agent, a co-sulfiding agent, and a collector to produce a mixed flotation concentrate, a mixed flotation tailing, and a mixed flotation intermediate product; (2) Using the mixed flotation concentrate in step (1) as the feed, adding acid to make the medium pH 2 - 3, and stirring and leaching to dissolve copper oxide and some acid-soluble gangue minerals in the feed. The leaching solution is subjected to extraction and electrowinning to produce cathode copper; (3) After the leaching residue obtained in step (2) is washed and dewatered, clear water is added to adjust the pulp concentration to 55 - 60%, and alkali is added to neutralize to a pulp medium pH of 7 - 7.5, and then fed into a second-stage re-grinder for grinding to a fineness of -0.074 mm occupancy of 70 - 75%; (4) Using the re-ground product obtained in step (3) as the feed ore, adding water to adjust the pulp concentration to 15 - 20%, and adding a copper inhibitor for copper-molybdenum separation by roughing, cleaning, and scavenging to produce copper concentrate, molybdenum concentrate, and a copper-molybdenum separation flotation intermediate product.

[0005] In the technical solution of a comprehensive recovery method for copper-molybdenum ore containing copper oxide of the present invention, the further preferred technical solution features are:

[0006] 1. The mixed flotation intermediate product in step (1) is the mixed flotation cleaning tailing and the mixed scavenging concentrate, which are returned to the raw ore for grinding;

[0007] 2. In step (1), the mixed flotation tailings are fed into the tailings pond as the final tailings;

[0008] 3. In step (1), the raw ore is ground by a mill to a fineness of -0.074 mm with a occupancy rate of 63%;

[0009] 4. In step (2), acid is added using the mixed flotation concentrate in step (1) as the feed to adjust the pH of the medium to 2.5;

[0010] 5. In step (3), after the leaching residue obtained in step (2) is washed and dewatered, clear water is added to adjust the pulp concentration to 55% by mass, and alkali is added to neutralize the pulp medium to pH 7, and then it is fed into the second-stage re-grinding mill for grinding to a fineness of -0.074 mm with a occupancy rate of 70%;

[0011] 6. In step (3), after the leaching residue obtained in step (2) is washed and dewatered, clear water is added to adjust the pulp concentration to 60% by mass, and alkali is added to neutralize the pulp medium to pH 7.5, and then it is fed into the second-stage re-grinding mill for grinding to a fineness of -0.074 mm with a occupancy rate of 75%;

[0012] 7. In step (3), after the leaching residue obtained in step (2) is washed and dewatered, clear water is added to adjust the pulp concentration to 58% by mass, and alkali is added to neutralize the pulp medium to pH 7.3, and then it is fed into the second-stage re-grinding mill for grinding to a fineness of -0.074 mm with a occupancy rate of 73%;

[0013] 8. In step (4), the grinding product of the re-grinding mill obtained in step (3) is used as the feed ore, and water is added to adjust the pulp concentration to 17%.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] (1) By adopting the method of flotation combined with hydrometallurgy, cathode copper, copper concentrate and molybdenum concentrate are finally produced, solving the problem of effective recovery of copper-molybdenum oxide ore;

[0016] (2) It has strong adaptability and can widely adapt to sulfur-oxygen mixed copper-molybdenum ores with different oxidation rates;

[0017] (3) While leaching copper oxide minerals by acid leaching, some acid-soluble impurities are dissolved, improving the purity of copper sulfide and molybdenum sulfide minerals in the leaching residue, and ensuring high-quality copper concentrate and molybdenum concentrate are obtained subsequently;

[0018] (4) This method finally produces cathode copper, copper concentrate and molybdenum concentrate, solving the problems of low grade, low recovery index and difficult recovery of copper-molybdenum oxide ore. Such ores are often stockpiled for treatment. This method makes such refractory ores become easy-to-treat ores, avoiding the costs and land waste caused by stockpiling treatment and improving the resource value. Detailed implementation manners

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] Example 1, A comprehensive recovery method for copper molybdenum ore containing copper oxide, comprising the following steps: (1) After the raw ore is ground by a mill to a fineness of -0.074mm occupancy rate of 60-65%, it is mixed with a pH adjuster, a sulfiding agent, a co-sulfiding agent, and a collector for rough flotation, cleaning flotation, and scavenging flotation to produce a mixed flotation concentrate, a mixed flotation tailing, and a mixed flotation intermediate product; (2) Using the mixed flotation concentrate in step (1) as a feedstock, adding acid to make the medium pH 2-3, and stirring and leaching to dissolve copper oxide and part of the acid-soluble gangue minerals in the feedstock. The leaching solution is subjected to extraction and electrowinning to produce cathode copper; (3) After the leaching residue obtained in step (2) is washed and dewatered, clear water is added to adjust the pulp concentration to 55-60% by mass, and alkali is added to neutralize to a pulp medium pH of 7-7.5, and then fed into a secondary regrinding mill to grind to a fineness of -0.074mm occupancy rate of 70-75%; (4) Using the regrinding product of the regrinding mill obtained in step (3) as the feed ore, adding water to adjust the pulp concentration to 15-20%, and adding a copper inhibitor for rough separation, cleaning separation, and scavenging separation of copper and molybdenum to produce copper concentrate, molybdenum concentrate, and a copper-molybdenum separation flotation intermediate product. In the above method, the copper-molybdenum separation flotation intermediate product is the tailing of the cleaning separation of copper-molybdenum separation flotation and the concentrate of the scavenging separation of copper-molybdenum separation flotation, and is returned to the secondary regrinding mill for grinding. The present invention is mainly used for treating copper molybdenum ore with a relatively high oxidation rate. The mixed flotation intermediate product is the tailing of the cleaning separation of mixed flotation and the concentrate of the scavenging separation of mixed flotation. After being combined, it is returned to the first-stage grinding mill for grinding. The copper-molybdenum separation flotation intermediate product is the tailing of the cleaning separation of copper-molybdenum separation flotation and the concentrate of the scavenging separation of copper-molybdenum separation flotation. After being combined, it is returned to the secondary grinding mill for grinding. The acid leaching dissolves copper oxide minerals and part of the acid-soluble impurities. While recovering copper oxide minerals, the purity of copper sulfide and molybdenum sulfide minerals in the leaching residue is improved, which is beneficial to obtaining high-quality copper concentrate and molybdenum concentrate in the subsequent process. The present invention adopts a combined method of beneficiation and metallurgy. After the raw ore is processed, three valuable products, namely cathode copper, copper concentrate, and molybdenum concentrate, are produced, improving the recovery rate of valuable metals such as copper and molybdenum and the quality of the products. By using the present invention to obtain copper concentrate, molybdenum concentrate, and cathode copper, while greatly improving the comprehensive recovery rate of copper in oxygen-containing copper molybdenum ore, the copper content in molybdenum concentrate is reduced, and the quality of molybdenum concentrate is improved, providing technical support for ensuring the economic benefits of the resource treatment of this type of ore.

[0021] Example 2, In a comprehensive recovery method for copper molybdenum ore containing copper oxide according to Example 1, the mixed flotation intermediate product in step (1) is the tailing of the cleaning separation of mixed flotation and the concentrate of the scavenging separation of mixed flotation, and is returned to the raw ore for grinding.

[0022] Example 3. In a comprehensive recovery method of copper-molybdenum ore containing copper oxide according to Example 1 or 2, the mixed flotation tailings in step (1) are fed into the tailings pond as the final tailings.

[0023] Example 4. In a comprehensive recovery method of copper-molybdenum ore containing copper oxide according to any one of Examples 1-3, the raw ore in step (1) is ground by a mill to a fineness of -0.074 mm with an occupancy rate of 63%.

[0024] Example 5. In a comprehensive recovery method of copper-molybdenum ore containing copper oxide according to any one of Examples 1-4, in step (2), acid is added using the mixed flotation concentrate in step (1) as the feed to make the medium pH 2.5.

[0025] Example 6. In a comprehensive recovery method of copper-molybdenum ore containing copper oxide according to any one of Examples 1-5, in step (3), the leaching residue obtained in step (2) is washed, dewatered, then added with clear water to adjust the pulp concentration to 55% by mass, neutralized with alkali to a pulp medium pH of 7, and fed into a second-stage re-grinding mill to grind to a fineness of -0.074 mm with an occupancy rate of 70%.

[0026] Example 7. In a comprehensive recovery method of copper-molybdenum ore containing copper oxide according to any one of Examples 1-6, in step (3), the leaching residue obtained in step (2) is washed, dewatered, then added with clear water to adjust the pulp concentration to 60% by mass, neutralized with alkali to a pulp medium pH of 7.5, and fed into a second-stage re-grinding mill to grind to a fineness of -0.074 mm with an occupancy rate of 75%.

[0027] Example 8. In a comprehensive recovery method of copper-molybdenum ore containing copper oxide according to any one of Examples 1-7, in step (3), the leaching residue obtained in step (2) is washed, dewatered, then added with clear water to adjust the pulp concentration to 58% by mass, neutralized with alkali to a pulp medium pH of 7.3, and fed into a second-stage re-grinding mill to grind to a fineness of -0.074 mm with an occupancy rate of 73%.

[0028] Example 9. In a comprehensive recovery method of copper-molybdenum ore containing copper oxide according to any one of Examples 1-8, in step (4), the product of the re-grinding mill obtained in step (3) is used as the feed ore, and water is added to adjust the pulp concentration to 17%.

[0029] Example 10. Treat a copper-molybdenum ore with a copper grade of 0.32%, a molybdenum grade of 0.03%, a copper oxidation rate of 25.4%, and a molybdenum oxidation rate of 5.6%:

[0030] Step 1: Grind the well-crushed raw ore using a single-stage grinding mill to a -0.074 mm occupancy rate of 64%. Add 1000 g / t of sodium carbonate as a pH adjuster, 300 g / t of sodium silicate, 500 g / t of sodium sulfide as a sulfiding agent, 100 g / t of ammonium sulfate as a co-sulfiding agent, 20 g / t of O-isopropyl-N-ethyl thionocarbamate, 40 g / t of sodium butyl xanthate, 15 g / t of kerosene as collectors, and 30 g / t of No. 2 oil as a frother for the bulk flotation of copper and molybdenum. The bulk flotation rougher concentrate is subjected to two-stage cleaning to produce a copper-molybdenum bulk concentrate and a bulk cleaning tailing. Add 15 g / t of sodium butyl xanthate as a collector and 10 g / t of a frother to the bulk flotation tailing for bulk scavenging to produce a tailing and a scavenging concentrate. Intermediate products such as the bulk cleaning tailing and the scavenging concentrate are returned to the single-stage grinding mill for grinding. # The bulk flotation rougher concentrate is subjected to two-stage cleaning to produce a copper-molybdenum bulk concentrate and a bulk cleaning tailing. Add 15 g / t of sodium butyl xanthate as a collector and 10 g / t of a frother to the bulk flotation tailing for bulk scavenging to produce a tailing and a scavenging concentrate. Intermediate products such as the bulk cleaning tailing and the scavenging concentrate are returned to the single-stage grinding mill for grinding.

[0031] Step 2: Feed the copper-molybdenum bulk flotation concentrate pulp obtained in Step 1 into an acid leaching agitation tank. Add sulfuric acid to adjust the pH of the pulp medium to 2.5 - 3 and the sulfuric acid concentration to 75 g / L, and stir and leach for 1.8 h. The leachate is subjected to extraction and electrowinning to produce cathode copper.

[0032] Step 3: After washing, deacidifying, and dehydrating the leaching residue obtained in Step 2, adjust the pulp concentration to 58% by adding water, add sodium hydroxide to adjust the pH to 7.2, feed it into a two-stage grinding mill for grinding, grind it further to a fineness of -0.074 mm occupancy rate of 75%, and add water to adjust the pulp concentration to 18% to enter the copper-molybdenum separation.

[0033] Step 4: Add 1000 g / t of sodium sulfide and 200 g / t of sodium tripolyphosphate as inhibitors to the pulp obtained in Step 3 for the bulk separation of copper and molybdenum to obtain a molybdenum rougher concentrate and a molybdenum tailing. The molybdenum rougher concentrate is subjected to three-stage cleaning to produce a molybdenum concentrate and a molybdenum cleaning tailing. The molybdenum tailing is subjected to two-stage scavenging to produce a scavenging concentrate and a scavenging tailing. The cleaning tailing and the scavenging concentrate are combined and returned to the two-stage regrinding mill for grinding. The scavenging tailing is the copper concentrate.

[0034] In this example, the raw ore has a copper grade of 0.32%, a molybdenum grade of 0.03%, a copper oxidation rate of 25.4%, and a molybdenum oxidation rate of 5.6%. Through the present invention, a molybdenum concentrate with a molybdenum grade of 47.46% and a recovery rate of 68.95% is obtained, a copper concentrate with a copper grade of 20.67% and a recovery rate of 67.65%, a cathode copper with a copper recovery rate of 20.03%, and a total copper recovery rate of 87.68%.

[0035] Example 11: Treat a copper-molybdenum ore with a copper grade of 0.18%, a molybdenum grade of 0.06%, a copper oxidation rate of 16.6%, and a molybdenum oxidation rate of 2.9%:

[0036] Step 1: Grind the crushed raw ore in a single-stage grinding mill to a -0.074 mm occupancy rate of 60%. Add 500 g / t of lime as a pH adjuster, 300 g / t of sodium hexametaphosphate, 300 g / t of sodium hydrosulfide as a sulfiding agent, 100 g / t of ammonium bicarbonate as a co-sulfiding agent, 10 g / t of acrylonitrile butylxanthate, 40 g / t of sodium diethyldithiocarbamate, 20 g / t of diesel as a collector, and 2 # oil 20 g / t for the bulk roughing of copper and molybdenum. The bulk roughing concentrate is subjected to two-stage cleaning to produce a copper-molybdenum bulk concentrate and a bulk cleaning tailing. Add 5 g / t of acrylonitrile butylxanthate, 15 g / t of sodium diethyldithiocarbamate, 5 g / t of diesel as a collector, and 2 # oil 5 g / t for the bulk scavenging to produce tailings and a scavenging concentrate. Intermediate products such as the bulk cleaning tailings and the scavenging concentrate are returned to the single-stage grinding mill for grinding.

[0037] Step 2: Feed the copper-molybdenum bulk flotation concentrate pulp obtained in Step 1 into an acid leaching agitation tank. Add sulfuric acid to adjust the pH of the pulp medium to 2.5 - 3 and the sulfuric acid concentration to 65 g / L, and stir and leach for 1.2 h. The leachate is subjected to extraction and electrowinning to produce cathode copper.

[0038] Step 3: After washing, deacidifying, and dehydrating the leaching residue obtained in Step 2, add water to adjust the pulp concentration to 55%, add sodium hydroxide to adjust the pH to 7.5, feed it into a two-stage grinding mill for grinding, grind it further to a fineness of -0.074 mm occupancy rate of 70%, and add water to adjust the pulp concentration to 15% for copper-molybdenum separation.

[0039] Step 4: Add 600 g / t of sodium hydrosulfide and 500 g / t of sodium silicate as inhibitors to the pulp obtained in Step 3 for the bulk roughing of copper-molybdenum separation to obtain a molybdenum bulk concentrate and molybdenum tailings. The molybdenum bulk concentrate is subjected to three-stage cleaning to produce a molybdenum concentrate and molybdenum cleaning tailings. The molybdenum tailings are subjected to two-stage scavenging to produce a scavenging concentrate and scavenging tailings. The cleaning tailings and the scavenging concentrate are combined and fed into the two-stage regrinding mill for grinding. The scavenging tailings are copper concentrate.

[0040] In this example, the raw ore has a copper grade of 0.18%, a molybdenum grade of 0.06%, a copper oxidation rate of 16.6%, and a molybdenum oxidation rate of 2.9%. Through the method of the present invention, a molybdenum concentrate with a molybdenum grade of 49.22% and a recovery rate of 75.51% is obtained, a copper concentrate with a copper grade of 18.19% and a recovery rate of 68.28% is obtained, a cathode copper copper recovery rate of 13.31% is obtained, and a total copper recovery rate of 81.61% is obtained.

[0041] Example 12: Treat a copper-molybdenum ore containing copper oxide with a copper grade of 0.43%, a molybdenum grade of 0.09%, a copper oxidation rate of 14.18%, and a molybdenum oxidation rate of 1.3%:

[0042] Step 1: Grind the crushed raw ore to a -0.074 mm occupancy rate of 65% using a single-stage grinding mill. Add 2000 g / t of sodium carbonate as a pH adjuster, 500 g / t of sodium silicate, 300 g / t of sodium sulfide as a sulfiding agent, 500 g / t of ammonium chloride as a co-sulfiding agent, 25 g / t of ammonium dibutyldithiophosphate, 45 g / t of sodium isoamyl xanthate, and 30 g / t of kerosene as collectors, and 25 g / t of a frother for the bulk flotation of copper and molybdenum. The bulk rougher concentrate is subjected to three stages of cleaning to produce a bulk copper-molybdenum concentrate and a bulk cleaning tailing. The bulk rougher tailing is added with 10 g / t of ammonium dibutyldithiophosphate, 15 g / t of sodium isoamyl xanthate, 10 g / t of kerosene as collectors, and 5 g / t of a frother for bulk scavenging to produce a tailing and a scavenging concentrate. Intermediate products such as the bulk cleaning tailing and the scavenging concentrate are returned to the single-stage grinding mill for grinding. # The bulk rougher concentrate is subjected to three stages of cleaning to produce a bulk copper-molybdenum concentrate and a bulk cleaning tailing. The bulk rougher tailing is added with 10 g / t of ammonium dibutyldithiophosphate, 15 g / t of sodium isoamyl xanthate, 10 g / t of kerosene as collectors, and 5 g / t of a frother for bulk scavenging to produce a tailing and a scavenging concentrate. Intermediate products such as the bulk cleaning tailing and the scavenging concentrate are returned to the single-stage grinding mill for grinding. # The bulk rougher tailing is added with 10 g / t of ammonium dibutyldithiophosphate, 15 g / t of sodium isoamyl xanthate, 10 g / t of kerosene as collectors, and 5 g / t of a frother for bulk scavenging to produce a tailing and a scavenging concentrate. Intermediate products such as the bulk cleaning tailing and the scavenging concentrate are returned to the single-stage grinding mill for grinding.

[0043] Step 2: Feed the copper-molybdenum bulk flotation concentrate pulp obtained in Step 1 into an acid leaching agitation tank. Add sulfuric acid to adjust the pH of the pulp medium to 2.5 - 3 and the sulfuric acid concentration to 63 g / L, and stir and leach for 1.5 h. The leachate is subjected to extraction and electrowinning to produce cathode copper.

[0044] Step 3: Wash and deacidify, dehydrate the leaching residue obtained in Step 2, then add water to adjust the pulp concentration to 60%, add sodium hydroxide to adjust the pH to 7.0, feed it into a two-stage grinding mill for grinding, grind it to a fineness of -0.074 mm occupancy rate of 73%, and then add water to adjust the pulp concentration to 20% for copper-molybdenum separation.

[0045] Step 4: Add 300 g / t of sodium mercaptoacetate and 500 g / t of sodium silicate as inhibitors to the pulp obtained in Step 3 for the bulk separation of copper and molybdenum to obtain a molybdenum bulk rougher concentrate and a molybdenum tailing. The molybdenum bulk rougher concentrate is subjected to three stages of cleaning to produce a molybdenum concentrate and a molybdenum cleaning tailing. The molybdenum tailing is subjected to two stages of scavenging to produce a scavenging concentrate and a scavenging tailing. The cleaning tailing and the scavenging concentrate are combined and fed into a two-stage regrinding mill for grinding. The scavenging tailing is the copper concentrate.

[0046] In this example, the copper grade is 0.43%, the molybdenum grade is 0.09%, the copper oxidation rate is 14.18%, and the molybdenum oxidation rate is 1.3%. Through the method of the present invention, a molybdenum concentrate with a molybdenum grade of 50.81% and a recovery rate of 82.86% is obtained, a copper concentrate with a copper grade of 21.60% and a recovery rate of 82.28%, a cathode copper with a copper recovery rate of 10.53%, and a total copper recovery rate of 92.81%.

[0047] The above is only a preferred embodiment of the present invention for a patent, but the protection scope of the present invention for a patent is not limited thereto. Any person skilled in the art within the scope disclosed by the present invention for a patent, according to the technical solution of the present invention for a patent and its inventive concept, makes equivalent substitutions or changes, all belong to the protection scope of the present invention for a patent.

Claims

1. A comprehensive recovery method for copper-molybdenum ore containing copper oxide, characterized in that, It includes the following steps: (1) After the raw ore is ground by a mill to a fineness of -0.074mm with an occupancy rate of 60 - 65%, it is mixed and flotated for roughing, cleaning, and scavenging with a pH adjuster, a sulfiding agent, a co-sulfiding agent, and a collector, to produce a mixed flotation concentrate, a mixed flotation tailings, and a mixed flotation intermediate product; the mixed flotation intermediate product is the tailings of the mixed flotation cleaning and the concentrate of the mixed flotation scavenging, and is returned to the raw ore for grinding; the mixed flotation tailings are fed into the tailings pond as the final tailings; (2) Using the mixed flotation concentrate in step (1) as the feed, adding acid to make the medium pH 2 - 3, and stirring and leaching to dissolve the copper oxide and part of the acid-soluble gangue minerals in the feed. The leaching solution is subjected to extraction and electrowinning to produce cathode copper; (3) After the leaching residue obtained in step (2) is washed and dewatered, clear water is added to adjust the pulp concentration to 55 - 60% by mass, and alkali is added to neutralize to a pulp medium pH of 7 - 7.5, and then fed into a secondary re-grinder for grinding to a fineness of -0.074mm with an occupancy rate of 70 - 75%; (4) Using the grinding product of the secondary re-grinder obtained in step (3) as the ore feed, adding water to adjust the pulp concentration to 15 - 20%, and adding a copper inhibitor for roughing, cleaning, and scavenging of copper-molybdenum separation, to produce a copper concentrate, a molybdenum concentrate, and a copper-molybdenum separation flotation intermediate product; the copper-molybdenum separation flotation intermediate product is the tailings of the copper-molybdenum separation flotation cleaning and the concentrate of the copper-molybdenum separation flotation scavenging, and is returned to the secondary re-grinder for grinding.

2. The comprehensive recovery method of copper-molybdenum ore containing copper oxide according to claim 1, characterized in that: In step (1), the raw ore is ground by a mill to a fineness of -0.074mm with an occupancy rate of 63%.

3. A comprehensive recovery method of copper-molybdenum ore containing copper oxide according to claim 1, characterized in that: In step (2), using the mixed flotation concentrate in step (1) as the feed, adding acid to make the medium pH 2.

5.

4. A comprehensive recovery method for copper-molybdenum ore containing copper oxide according to claim 1, characterized in that: In step (3), after the leaching residue obtained in step (2) is washed and dewatered, clear water is added to adjust the pulp concentration to 55% by mass, and alkali is added to neutralize to a pulp medium pH of 7, and then fed into a secondary re-grinder for grinding to a fineness of -0.074mm with an occupancy rate of 70%.

5. A comprehensive recovery method for copper-molybdenum ore containing copper oxide according to claim 1, characterized in that: In step (3), after the leaching residue obtained in step (2) is washed and dewatered, clear water is added to adjust the pulp concentration to 60% by mass, and alkali is added to neutralize to a pulp medium pH of 7.5, and then fed into a secondary re-grinder for grinding to a fineness of -0.074mm with an occupancy rate of 75%.

6. A comprehensive recovery method for copper-molybdenum ore containing copper oxide according to claim 1, characterized in that: In step (3), after the leaching residue obtained in step (2) is washed and dewatered, clear water is added to adjust the pulp concentration to 58% by mass, and alkali is added to neutralize to a pulp medium pH of 7.3, and then fed into a secondary re-grinder for grinding to a fineness of -0.074mm with an occupancy rate of 73%.

7. A comprehensive recovery method for copper-molybdenum ore containing copper oxide according to claim 1, characterized in that: In step (4), using the grinding product of the secondary re-grinder obtained in step (3) as the ore feed, adding water to adjust the pulp concentration to 17%.