CN112871439A - Industrial production method for separating fine-grained copper-molybdenum bulk concentrate by using pulsating high-gradient magnetic separation technology - Google Patents
Industrial production method for separating fine-grained copper-molybdenum bulk concentrate by using pulsating high-gradient magnetic separation technology Download PDFInfo
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- 239000012141 concentrate Substances 0.000 title claims abstract description 93
- 238000007885 magnetic separation Methods 0.000 title claims abstract description 54
- WUUZKBJEUBFVMV-UHFFFAOYSA-N copper molybdenum Chemical compound [Cu].[Mo] WUUZKBJEUBFVMV-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 47
- 238000009776 industrial production Methods 0.000 title claims abstract description 15
- 238000005516 engineering process Methods 0.000 title claims abstract description 13
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 70
- 239000011733 molybdenum Substances 0.000 claims abstract description 70
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 64
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 60
- 239000010949 copper Substances 0.000 claims abstract description 60
- 229910052802 copper Inorganic materials 0.000 claims abstract description 60
- 238000005188 flotation Methods 0.000 claims abstract description 39
- 230000005291 magnetic effect Effects 0.000 claims description 27
- 230000006698 induction Effects 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 5
- 238000000926 separation method Methods 0.000 abstract description 29
- 238000004519 manufacturing process Methods 0.000 abstract description 17
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 abstract description 2
- DVRDHUBQLOKMHZ-UHFFFAOYSA-N chalcopyrite Chemical compound [S-2].[S-2].[Fe+2].[Cu+2] DVRDHUBQLOKMHZ-UHFFFAOYSA-N 0.000 description 11
- 229910052951 chalcopyrite Inorganic materials 0.000 description 11
- 229910052961 molybdenite Inorganic materials 0.000 description 11
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 11
- 238000011084 recovery Methods 0.000 description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 description 4
- 239000011707 mineral Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000004576 sand Substances 0.000 description 3
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 239000008396 flotation agent Substances 0.000 description 2
- 239000006148 magnetic separator Substances 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910052979 sodium sulfide Inorganic materials 0.000 description 2
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910001779 copper mineral Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005292 diamagnetic effect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/025—High gradient magnetic separators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention relates to an industrial production method for separating fine-grained copper-molybdenum bulk concentrates by applying a pulsating high-gradient magnetic separation technology, belonging to the technical field of separation of non-ferrous metal ores. The method comprises the steps of firstly pretreating fine-grained copper-molybdenum bulk concentrates through a specific magnetic separation process matched with a flotation production process, then carrying out pulse high-gradient magnetic separation on the fine-grained copper-molybdenum bulk concentrates to obtain low-molybdenum copper concentrates and molybdenum concentrates, then carrying out flotation separation on the molybdenum concentrates to obtain copper concentrates and copper-containing molybdenum concentrates, carrying out pulse high-gradient magnetic separation on the copper-containing molybdenum concentrates after flotation separation to obtain qualified molybdenum concentrates, returning the residual middlings to the flotation process, and successfully carrying out industrial production tests on certain porphyry type copper-molybdenum ores in China. The invention succeeds in production test, which marks that a major breakthrough is made in the technical field of copper-molybdenum separation of porphyry copper ores, and the magnetic separation technology is applied to the copper-molybdenum separation of the porphyry copper ores at home and abroad, so that the blank of the magnetic separation technology in the copper-molybdenum separation production application is filled.
Description
Technical Field
The invention relates to an industrial production method for separating fine-grained copper-molybdenum bulk concentrates by applying a pulsating high-gradient magnetic separation technology, belonging to the technical field of separation of non-ferrous metal ores.
Background
Copper and molybdenum are two important nonferrous metals, are important rare and strategic reserve resources in China, and are widely applied to a plurality of fields such as electronics, ships, aerospace and the like due to good physical and chemical properties. China is a large country with copper and molybdenum resources, wherein the molybdenum resource reserves account for about 40% of the world, but single molybdenum ore deposits in China are few, and most of molybdenum exists in porphyry type copper molybdenum (chalcopyrite-molybdenite) ore deposits and is a main source for extracting molybdenum metal in China industry; statistics shows that more than 50% of molybdenum concentrate in China comes from the porphyry type copper-molybdenum ore. However, most porphyry-type copper-molybdenum ore deposits in China have low grade, the accompanying relation of copper and molybdenum is complex, the embedded particle size is very fine, the separation difficulty of the two is very high, and the industrial production and application are difficult.
Chalcopyrite (chemical formula CuFeS)2) And molybdenite (MoS)2) Both are sulfide ores, and the sulfide ores are easy to co-float but difficult to float and separate. Currently, copper and molybdenum ore production enterprises in China adopt a 'copper and molybdenum mixed flotation-flotation separation' process to produce copper concentrates and molybdenum concentrates, namely, chalcopyrite and molybdenite are firstly mixed and floated to obtain copper and molybdenum mixed concentrates, and then the chalcopyrite and the molybdenite are separated by flotation (copper and molybdenum flotation suppression). However, chalcopyrite and molybdenite have similar floatability, so that a large amount of chemicals such as sodium sulfide and the like are consumed for inhibiting chalcopyrite during flotation separation, and the process is long, so that the separation cost is high, economic benefits are difficult to obtain, and all the chemicals are toxic and have great harm to the environment. At present, the flotation separation of chalcopyrite and molybdenite is adopted, the molybdenum recovery rate of molybdenum concentrate is only about 60% generally, and the molybdenum resource is not developed and utilized effectively and economically. So far, how to efficiently separate copper and molybdenum and maximally develop and utilize precious molybdenum resources is still a worldwide problem to be solved urgently at home and abroad.
On the other hand, chalcopyrite is a weakly magnetic mineral and has a specific magnetization coefficient of 0.844X 10-6 m3In terms of kg, molybdenite is a diamagnetic mineral having a specific magnetization of-0.001X 10-6 m3Kg, so that the two can be separated by magnetic separation theoretically. In recent years, some works of high-gradient magnetic separation of copper-molybdenum bulk concentrates are developed domestically, and the works are not successful in industry. Actually, as early as the end of the 20 th century, China has a literature report of applying pulsating high-gradient magnetic separation copper-molybdenum bulk concentrates, but because the adopted rod media, the magnetic separation process and the technical parameters are incorrect, the effect of separating copper from molybdenum is not ideal, and the molybdenum recovery rate is only about 70%. At present, no industrial test or industrial application case for successful high-gradient magnetic separation of copper-molybdenum bulk concentrates exists at home and abroad.
The patent application number is 2020101538498, which is named as a process for directly separating chalcopyrite and molybdenite by superconducting magnetic separation, and the process comprises the steps of firstly carrying out superconducting low-intensity magnetic separation on mixed concentrate of the chalcopyrite and the molybdenite by using a superconducting magnetic separator under the condition of low magnetic field intensity to remove strong magnetic minerals, and then carrying out superconducting high-intensity magnetic separation on the mixed concentrate by using the superconducting magnetic separator under the condition of high magnetic field intensity to realize the direct separation of the chalcopyrite and the molybdenite. However, this method is not directly applied industrially.
The patent application number is 2019107366577, which is named as a new grading preselection-stirring mill-flotation process for improving the quality of copper concentrate, the process takes flotation copper concentrate as a raw material and comprises the steps of concentration and reagent removal, grading preselection, stirring and grinding and copper flotation. According to the invention, most of the residual beneficiation reagent in the copper concentrate pulp is removed by concentration, according to the characteristics that the copper concentrate is fine in granularity and copper is enriched in fine fraction, fine-fraction high-grade copper concentrate is obtained by classifying and pre-separating through a cyclone, and the sand setting is reground and recleaning, so that the effective separation of impurity minerals and copper minerals is realized, and the purpose of improving the grade of the copper concentrate is realized.
Patent application No. 2019107366543, entitled pretreatment-magnetic-flotation combined beneficiation process for separation of molybdenum-copper containing concentrates, discloses that the process takes molybdenum-copper containing concentrates obtained by flotation as raw materials, and comprises the following steps: carrying out grading pretreatment on the molybdenum-containing copper concentrate by adopting two-stage series cyclones to obtain overflow and mixed settled sand; adding water into the mixed settled sand, and performing copper-molybdenum magnetic separation to obtain magnetic concentrate and magnetic tailings; and concentrating, dehydrating and mixing the magnetic separation tailings, and performing copper-molybdenum flotation separation to obtain molybdenum concentrate and copper concentrate.
The processes all involve magnetic separation and other treatment processes for separating molybdenum-copper concentrate, but the processes are not industrially applied.
Disclosure of Invention
Aiming at the problems and the defects in the prior art, the invention provides an industrial production method for separating fine-grained copper-molybdenum bulk concentrates by applying a pulsating high-gradient magnetic separation technology. The invention adopts the specific magnetic separation process matched with the flotation production process and adopts the pretreatment-pulsating high-gradient magnetic separation-roughing-concentrating-flotation-pulsating high-gradient magnetic separation processes, and the industrial production test of certain porphyry type copper-molybdenum ore in China is successful. The invention is realized by the following technical scheme.
An industrial production method for separating fine-grained copper-molybdenum bulk concentrate by applying a pulsating high-gradient magnetic separation technology comprises the following specific steps:
the method adopts a pretreatment-pulsating high-gradient magnetic separation-rough-fine separation-flotation-pulsating high-gradient magnetic separation process, and specifically comprises the following steps:
(1) pretreating, namely firstly adjusting the concentration of ore pulp of the fine-grain copper-molybdenum bulk concentrate to 10-30 wt%, adding a pH regulator to adjust the pH value of the ore pulp to be alkaline, and stirring for 3-5 min;
(2) performing pulsed high-gradient magnetic separation-rough-fine concentration, and performing pulsed high-gradient magnetic separation-rough-fine concentration on the fine-grain copper-molybdenum mixed concentrate pretreated in the step (1) to obtain low-molybdenum copper concentrate and molybdenum concentrate, wherein a combined magnetic medium with the magnetic induction intensity of 1.0-2.0 is adopted in the pulsed high-gradient magnetic separation-rough-fine concentration, the magnetic induction intensity is 1.7-1.8T, the pulse frequency is 100-350 r/min, and the pulse stroke is 5-30 mm;
(3) performing flotation, namely performing flotation on the molybdenum concentrate obtained in the step (2) to obtain copper concentrate and copper-containing molybdenum concentrate;
(4) performing pulsed high-gradient magnetic separation, namely performing pulsed high-gradient magnetic separation on the copper-containing molybdenum concentrate obtained in the step (3) to obtain qualified molybdenum concentrate and middling, and returning the middling to the flotation process in the step (3); wherein 1.0-2.0 combined rod media are adopted for the pulsed high-gradient magnetic separation, the magnetic induction intensity is 1.7-1.8T, the pulsed frequency is 100-350 r/min, and the pulsed stroke is 5-30 mm.
In the step (1), the copper grade and the molybdenum grade in the fine-grained copper-molybdenum bulk concentrate are respectively 10-30 wt% and 0.15-1.50 wt%.
The flotation process in the step (3) adopts the current conventional flotation production process and agent system, and the consumption of the flotation agent is reduced by 20-40% compared with the conventional flotation separation process.
The pulsating high-gradient magnetic separation in the step (2) needs to control the configuration of medium wires and the arrangement and combination of the medium wires; the configuration of the medium silk in the step (2) is determined by patents ZL201610574053.3 and ZL201610061835.7, and the medium multi-silk arrangement combination model is determined by patents: ZL 201210074235.6.
The invention has the beneficial effects that:
(1) the method comprises the steps of firstly pretreating fine-grained copper-molybdenum bulk concentrates through a specific magnetic separation process matched with a flotation production process, then carrying out pulse high-gradient magnetic separation on the fine-grained copper-molybdenum bulk concentrates to obtain low-molybdenum copper concentrates and molybdenum concentrates, then carrying out flotation separation on the molybdenum concentrates to obtain copper concentrates and copper-containing molybdenum concentrates, carrying out pulse high-gradient magnetic separation on the copper-containing molybdenum concentrates after flotation separation to obtain qualified molybdenum concentrates, returning the residual middlings to the flotation process, and successfully carrying out industrial production tests on certain porphyry type copper-molybdenum ores in China.
(2) The fine-grained copper-molybdenum bulk concentrate is subjected to pulsating high-gradient magnetic separation, namely rough concentration and fine concentration, the yield of the low-molybdenum copper concentrate is 20-40%, the molybdenum content is reduced to be below 0.10%, the copper grade is improved by 5-7%, and the copper recovery rate is 40-55%; the molybdenum content enrichment of the magnetic separation tailings (molybdenum concentrate) is improved by 30-50%, the copper grade is reduced by 3-5%, and the molybdenum recovery rate is as high as 90-95%.
(3) In the flotation separation process of the molybdenum concentrate, the low-molybdenum copper concentrate with the yield of 20-40% is extracted by pulsating high-gradient magnetic separation, namely rough concentration and fine concentration, the dosage of the flotation agent is reduced by 20-40% in the flotation process, and the overall production cost of copper-molybdenum separation is reduced by more than 30% by the technology.
(4) The invention succeeds in production test, which marks that a major breakthrough is made in the technical field of copper-molybdenum separation of porphyry copper ores, and the magnetic separation technology is applied to the copper-molybdenum separation of the porphyry copper ores at home and abroad, so that the blank of the magnetic separation technology in the copper-molybdenum separation production application is filled.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The invention is further described with reference to the following drawings and detailed description.
Example 1
The copper grade of some porphyry type copper-molybdenum ore in Yunnan is about 0.50 percent, the molybdenum grade is about 0.008 percent, copper mainly exists in the form of chalcopyrite, and molybdenum exists in the form of molybdenite. Carrying out mixed flotation on porphyry copper-molybdenum ores in Yunnan to obtain fine-grained copper-molybdenum bulk concentrates.
The industrial production method for separating the fine-grained copper-molybdenum bulk concentrate by applying the pulsating high-gradient magnetic separation technology comprises the following specific steps:
the method adopts a pretreatment-pulsating high-gradient magnetic separation-rough-fine separation-flotation-pulsating high-gradient magnetic separation process, and specifically comprises the following steps:
(1) pretreating, namely firstly, adjusting the concentration of ore pulp to be 20-25 wt% by using fine-grain copper-molybdenum bulk concentrates (the granularity is-325 meshes and accounts for 90-92%), adding a pH regulator (such as lime) to adjust the pH value of the ore pulp to be alkaline (9.5-10.0), and stirring for 3-5 min;
(2) performing pulsed high-gradient magnetic separation for rough-first concentration, and performing pulsed high-gradient magnetic separation for fine-grain copper-molybdenum mixed concentrate pretreated in the step (1) for rough-first concentration to obtain low-molybdenum copper concentrate and molybdenum concentrate, wherein a 1.5mm combined magnetic medium (the configuration of a medium wire is cylindrical, a medium multi-wire arrangement combined model is a cross matrix arrangement with 1.5mm as a main medium) is adopted in the pulsed high-gradient magnetic separation for rough-first concentration, the magnetic induction intensity is 1.8T, the pulse frequency is 150r/min, the pulse stroke is 12mm, and the pulp flow rate is about 5.0 cm/s;
(3) performing flotation, namely performing conventional flotation (such as taking sodium sulfide as copper inhibitor and kerosene as collector) on the molybdenum concentrate obtained in the step (2) to separate the molybdenum concentrate into copper concentrate and copper-containing molybdenum concentrate;
(4) performing pulsed high-gradient magnetic separation, namely performing pulsed high-gradient magnetic separation on the copper-containing molybdenum concentrate obtained in the step (3) to obtain qualified molybdenum concentrate and middling, and returning the middling to the flotation process in the step (3); wherein the pulsed high-gradient magnetic separation adopts a 1.5mm combined cylindrical rod medium, the magnetic induction intensity is 1.8T, the pulsed frequency of impact is 150r/min, and the pulsed stroke is 12 mm.
The results of the index obtained by the production method are shown in the following table 1.
TABLE 1
Description of the drawings: the pulsating high-gradient magnetic separation is an open-circuit test result, and the copper concentrate is returned to the flotation separation operation for recleaning in practice.
In the prior art, the porphyry type copper-molybdenum ore is used for producing copper concentrate and molybdenum concentrate by adopting a 'copper and molybdenum mixed flotation-flotation separation' process, and the production indexes are shown in the following table 2.
TABLE 2 production indexes (production report) of the conventional "copper and molybdenum mixed flotation-flotation separation" process
It is seen from the comparison between tables 1 and 2 that the present invention can obtain copper concentrate with low molybdenum content and qualified molybdenum concentrate product with copper content lower than 1.0%, and the molybdenum recovery rate of the molybdenum concentrate is higher than that of the traditional production process. The production process of the invention reduces the medicament consumption of the separation flotation operation by about 37 percent, and reduces the overall production cost of copper-molybdenum separation by 43 percent. The invention has succeeded in industrial production test of certain porphyry type copper molybdenum ore in China.
While the present invention has been described in detail with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, and various changes can be made without departing from the spirit and scope of the present invention.
Claims (3)
1. An industrial production method for separating fine-grained copper-molybdenum bulk concentrate by applying a pulsating high-gradient magnetic separation technology is characterized by comprising the following specific steps of:
the method adopts a pretreatment-pulsating high-gradient magnetic separation-rough-fine separation-flotation-pulsating high-gradient magnetic separation process, and specifically comprises the following steps:
(1) pretreating, namely firstly adjusting the concentration of ore pulp of the fine-grain copper-molybdenum bulk concentrate to 10-30 wt%, adding a pH regulator to adjust the pH value of the ore pulp to be alkaline, and stirring for 3-5 min;
(2) performing pulsed high-gradient magnetic separation-rough-fine concentration, and performing pulsed high-gradient magnetic separation-rough-fine concentration on the fine-grain copper-molybdenum mixed concentrate pretreated in the step (1) to obtain low-molybdenum copper concentrate and molybdenum concentrate, wherein a combined magnetic medium with the magnetic induction intensity of 1.0-2.0 is adopted in the pulsed high-gradient magnetic separation-rough-fine concentration, the magnetic induction intensity is 1.7-1.8T, the pulse frequency is 100-350 r/min, and the pulse stroke is 5-30 mm;
(3) performing flotation, namely performing flotation on the molybdenum concentrate obtained in the step (2) to obtain copper concentrate and copper-containing molybdenum concentrate;
(4) performing pulsed high-gradient magnetic separation, namely performing pulsed high-gradient magnetic separation on the copper-containing molybdenum concentrate obtained in the step (3) to obtain qualified molybdenum concentrate and middling, and returning the middling to the flotation process in the step (3); wherein 1.0-2.0 combined rod media are adopted for the pulsed high-gradient magnetic separation, the magnetic induction intensity is 1.7-1.8T, the pulsed frequency is 100-350 r/min, and the pulsed stroke is 5-30 mm.
2. The industrial production method for separating fine-grained copper molybdenum bulk concentrate using pulsating high gradient magnetic separation technique according to claim 1, characterized in that: in the step (1), the copper grade and the molybdenum grade in the fine-grained copper-molybdenum bulk concentrate are respectively 10-30 wt% and 0.15-1.50 wt%.
3. The industrial production method for separating fine-grained copper molybdenum bulk concentrate using pulsating high gradient magnetic separation technique according to claim 1, characterized in that: in the step (2), the pulsed high-gradient magnetic separation needs to control the configuration of the medium wires and the arrangement and combination of the medium wires.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114100853A (en) * | 2021-11-11 | 2022-03-01 | 黑龙江多宝山铜业股份有限公司 | Separation and recovery method of ultralow-grade refractory copper-molybdenum sulfide ore |
| CN114471935A (en) * | 2022-01-26 | 2022-05-13 | 中南大学 | Magnetic suspension combined copper-molybdenum separation method |
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