CN111632750A - Mineral separation method for copper-molybdenum ore with complex embedding characteristics - Google Patents
Mineral separation method for copper-molybdenum ore with complex embedding characteristics Download PDFInfo
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- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
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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
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- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
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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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/018—Mixtures of inorganic and organic compounds
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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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/02—Collectors
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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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/04—Frothers
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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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; specified applications
- B03D2203/02—Ores
Abstract
The invention relates to a mineral separation method of copper-molybdenum ore with complex embedding characteristics, which comprises the steps of firstly floating a part of coarse-grained molybdenum ore after coarse grinding of raw ore, then mixing and floating intergrowth copper-molybdenum ore with finer granularity after regrinding of coarse-grained molybdenum ore flotation tailings, merging and concentrating molybdenum rough concentrate obtained after separation of copper-molybdenum bulk concentrate obtained by mixing and floating and rough concentrate obtained by floating of coarse-grained molybdenum ore, and returning once concentrated middling to separation and regrinding operation. Compared with the conventional copper-molybdenum mixed floating-copper-molybdenum separation process, the recovery rate of molybdenum is greatly improved on the premise of ensuring that the recovery rate of copper is not reduced.
Description
Technical Field
The invention belongs to the technical field of mineral processing, and particularly relates to a mineral separation method for copper-molybdenum ores with complex embedding characteristics.
Background
A great part of molybdenum resources in China are sourced from molybdenite in copper-molybdenum ores, and the recovery of the copper-molybdenum ores generally adopts a scheme of copper-molybdenum mixed flotation-copper-molybdenum separation. Molybdenite is brittle and easy to over-crush, and when the intercalation granularity is not uniform and the intercalation relation is complex, the molybdenum metal is easy to over-grind by the conventional mixed-floating re-separation process, so that the defects of unsatisfactory copper-molybdenum separation index and low molybdenum recovery rate are caused.
Disclosure of Invention
The invention aims to provide the beneficiation method for the copper-molybdenum ore with complex embedding characteristics, which has the advantages of high metal recovery rate, strong technological process operability and wide application range.
In order to achieve the purpose, the invention provides a beneficiation method of copper-molybdenum ores with complex embedding characteristics, which is characterized by comprising the following steps:
step 1: grinding ore, namely crushing raw ore and then wet-grinding the crushed raw ore to the fineness of 50-60 percent with the content of 0.074 mm;
step 2: roughing coarse molybdenum minerals, namely, after the ore grinding product obtained in the step 1 is subjected to size mixing, roughing coarse molybdenum minerals to obtain molybdenum rough concentrate I and molybdenum rough tailings;
and step 3: the roughing tailings are ground again, the molybdenum roughing tailings obtained in the step 2 are concentrated and then are ground to a fineness of-0.074 mm, and the content of the molybdenum roughing tailings is 70-80%;
and 4, step 4: performing mixed flotation on the copper and molybdenum minerals, and performing rough concentration, scavenging and fine concentration on the ground mineral products obtained in the step 3 to obtain copper and molybdenum mixed concentrate and tailings;
and 5: regrinding the copper-molybdenum bulk concentrate, namely concentrating the copper-molybdenum bulk concentrate obtained by the fine selection in the step 4 and grinding the concentrated copper-molybdenum bulk concentrate to a fineness of-0.038 mm and a content of 85-90%;
step 6: separating and floating copper and molybdenum minerals, namely roughing and scavenging the ground ore product obtained in the step 5 to obtain molybdenum rough concentrate II, copper concentrate and scavenged middlings;
and 7: molybdenum mineral concentration: mixing the molybdenum rough concentrate I obtained in the step 2 and the molybdenum rough concentrate II obtained in the step 6, adding a regulator sodium hexametaphosphate, and carrying out primary concentration to obtain molybdenum rough concentrate and primary concentration middling;
and 8: returning the scavenging middlings in the step 6 and the first concentrating middlings in the step 7 to the copper-molybdenum bulk concentrate regrinding operation in the step 5;
and step 9: and (4) after the molybdenum rough concentrate obtained in the step (7) is subjected to size mixing, adding a regulator sodium hexametaphosphate, and carrying out concentration for 5-8 times to obtain molybdenum concentrate.
In the technical scheme of the ore dressing method for copper molybdenum ores with complex embedding characteristics, the further preferable technical scheme is characterized in that: the concentration in the step 7 is carried out 7 times.
Compared with the prior art, the invention has the beneficial effects that: coarse grinding the raw ore, then floating out a part of coarse molybdenum minerals, performing mixed flotation on the coarse molybdenum flotation tailings and then grinding the coarse molybdenum flotation tailings, and then inlaying intergrowth copper and molybdenum minerals with fine granularity, wherein the middlings once selected of the molybdenum coarse concentrates obtained by copper and molybdenum separation are returned to separation and regrinding operation, and the flotation process at the stage of grinding can effectively prevent the coarse molybdenum minerals from being over-ground in the subsequent grinding operation, so that the molybdenum loss rate is reduced; the molybdenum rough concentrates obtained by twice flotation are combined and concentrated, and the complexity of the process flow is reduced. The invention effectively solves the problem of high metal loss rate of copper-molybdenum ore with complex embedded granularity in the flotation recovery process. The method has the characteristics of high metal recovery rate, strong operability of process flow and wide application range.
Detailed Description
The following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Embodiment 1, a beneficiation method of copper-molybdenum ore with complex disseminated characteristics, comprising the following steps: step 1: grinding ore, namely crushing raw ore and then wet-grinding the crushed raw ore to the fineness of 50-60 percent with the content of 0.074 mm; step 2: roughing coarse molybdenum minerals, namely, after the ore grinding product obtained in the step 1 is subjected to size mixing, roughing coarse molybdenum minerals to obtain molybdenum rough concentrate I and molybdenum rough tailings; and step 3: the roughing tailings are ground again, the molybdenum roughing tailings obtained in the step 2 are concentrated and then are ground to a fineness of-0.074 mm, and the content of the molybdenum roughing tailings is 70-80%; and 4, step 4: performing mixed flotation on the copper and molybdenum minerals, and performing rough concentration, scavenging and fine concentration on the ground mineral products obtained in the step 3 to obtain copper and molybdenum mixed concentrate and tailings; and 5: regrinding the copper-molybdenum bulk concentrate, namely concentrating the copper-molybdenum bulk concentrate obtained by the fine selection in the step 4 and grinding the concentrated copper-molybdenum bulk concentrate to a fineness of-0.038 mm and a content of 85-90%; step 6: separating and floating copper and molybdenum minerals, namely roughing and scavenging the ground ore product obtained in the step 5 to obtain molybdenum rough concentrate II, copper concentrate and scavenged middlings; and 7: molybdenum mineral concentration: mixing the molybdenum rough concentrate I obtained in the step 2 and the molybdenum rough concentrate II obtained in the step 6, adding a regulator sodium hexametaphosphate, and carrying out primary concentration to obtain molybdenum rough concentrate and primary concentration middling; and 8: returning the scavenging middlings in the step 6 and the first concentrating middlings in the step 7 to the copper-molybdenum bulk concentrate regrinding operation in the step 5; and step 9: and (4) after the molybdenum rough concentrate obtained in the step (7) is subjected to size mixing, adding a regulator sodium hexametaphosphate, and carrying out concentration for 5-8 times to obtain molybdenum concentrate. The minerals mainly use valuable metals such as copper and molybdenum, the molybdenum minerals mainly exist in the form of molybdenite, one part of the molybdenite have thick embedded granularity and are filled in the gangue minerals in an aggregate dip-dyeing manner, the other part of the molybdenite have thin embedded granularity and are wrapped by the gangue minerals and continuously grow with the copper minerals, and the embedded characteristics of the molybdenite are complex. According to the method, a part of coarse-grained molybdenum minerals are firstly floated after raw ores are coarsely ground, intergrowth copper-molybdenum minerals with smaller granularity are subjected to mixed flotation after coarse-grained molybdenum mineral flotation tailings are reground, molybdenum rough concentrates obtained after copper-molybdenum mixed concentrates obtained by the mixed flotation are separated and rough concentrates obtained by the coarse-grained molybdenum mineral flotation are combined and concentrated, and middlings in primary concentration are returned to be separated and then ground. Compared with the conventional copper-molybdenum mixed floating-copper-molybdenum separation process, the recovery rate of molybdenum is greatly improved on the premise of ensuring that the recovery rate of copper is not reduced.
Example 2, in the beneficiation method of copper-molybdenum ore with complicated disseminated characteristics according to example 1, concentration is carried out 7 times in the step 7.
Example 3, the beneficiation method of copper-molybdenum ore with complicated intercalation characteristics according to example 1 or 2: after the ground ore product is mixed and sized in the step 3, collecting agents of butyl xanthate, kerosene and foaming agent 2 are added#Carrying out copper-molybdenum mineral mixed roughing and scavenging on the oil to obtain copper-molybdenum mixed rough concentrate, mixed scavenging middlings and tailings; after the mixed roughing concentrate is subjected to size mixing, adding a regulator sodium hexametaphosphate, and carrying out concentration for 1-2 times to obtain copper-molybdenum mixed concentrate and mixed concentration middlings; and returning the mixed scavenging middlings and the mixed concentration middlings to the mixed roughing operation.
Example 4, the beneficiation method of copper-molybdenum ore with complicated intercalation characteristics according to example 1, 2 or 3: adding adjusting agents of sodium sulfide, sodium hexametaphosphate, collecting agent of kerosene and foaming agent 2 into the ground ore product obtained in the step 5 after size mixing#Carrying out rough concentration and scavenging on molybdenum minerals on the oil to obtain molybdenum rough concentrate 2, and separating scavenging middlings and copper concentrate; separating and scavenging middlings and returning to separation roughing operation.
Example 5, the test ore sample was copper-molybdenum ore of Xinjiang, the copper grade of the raw ore was 0.55%, the molybdenum grade was 0.041%, the metal minerals were mainly pyrite, chalcopyrite and molybdenite, the gangue minerals were mainly quartz, calcite, feldspar, chlorite and the like, and part of molybdenite was used. Molybdenite is mainly produced in quartz, a part of the molybdenite is granular aggregate and is filled in gaps of quartz grains, a part of the molybdenite is single crystal and is wrapped by the quartz, the particle size of the molybdenite is relatively thick, the shape of the molybdenite is irregular, and the crystal of the molybdenite is self-shaped lath-shaped fine crystal and is continuously grown with copper minerals;
the copper-molybdenum ore recovery process comprises the following steps:
1) grinding, namely crushing raw ore and wet-grinding the crushed raw ore until the fineness of the raw ore is-0.074 mm and accounts for 60 percent, wherein the concentration of the ground ore is 55 percent.
2) Coarse molybdenum ore roughing: mixing the ground ore product obtained in the step 1), adding a collecting agent kerosene and a foaming agent 2 in sequence#And carrying out rough separation on the oil by using the coarse molybdenum minerals to obtain molybdenum rough concentrate 1 and molybdenum rough tailings.
3) And (3) regrinding the roughed tailings: concentrating the molybdenum rougher tailings obtained in the step 2), and wet-grinding the concentrated molybdenum rougher tailings until the fineness of the tailings is-0.074 mm and accounts for 80%, wherein the concentration of the grinded ore is 50%.
4) Copper-molybdenum mineral mixed flotation: adding the grinding product obtained in the step 3) into collecting agents of butyl xanthate, kerosene and foaming agent 2#Carrying out copper-molybdenum mineral mixed roughing and scavenging on the oil to obtain copper-molybdenum mixed rough concentrate, mixed scavenging middlings and tailings; after the mixed roughing concentrate is subjected to size mixing, adding a regulator sodium hexametaphosphate, and performing concentration twice to obtain copper-molybdenum mixed concentrate and mixed concentration middlings; and returning the mixed scavenging middlings and the mixed concentration middlings to the mixed roughing operation.
5) Concentrating the copper-molybdenum bulk concentrate obtained by the fine selection in the step 4), and grinding the concentrated copper-molybdenum bulk concentrate to a fineness of-0.038 mm, wherein the fineness of the mixed concentrate is 88%.
6) Separating and floating copper and molybdenum minerals: mixing the ore grinding product obtained in the step 5), adding adjusting agents of sodium sulfide, sodium hexametaphosphate, collecting agent of kerosene and foaming agent 2#Carrying out rough concentration and scavenging on molybdenum minerals on the oil to obtain molybdenum rough concentrate 2, and separating scavenging middlings and copper concentrate; separating and scavenging middlings and returning to separation roughing operation.
7) Molybdenum mineral concentration: mixing the molybdenum rough concentrate 1 obtained in the step 2) and the molybdenum rough concentrate 2 obtained in the step 6), adding a regulator sodium hexametaphosphate, and carrying out concentration for 7 times to obtain molybdenum concentrate and molybdenum concentration middlings; the molybdenum first concentration middlings and the scavenging middlings are returned to 5), and other middlings are returned to the previous concentration operation in sequence.
By adopting the process, the final beneficiation indexes of the copper-molybdenum ore are that the copper grade of the copper concentrate is 21.22%, the copper recovery rate is 93.33%, the molybdenum grade of the molybdenum concentrate is 44.52%, and the molybdenum recovery rate is 73.05%.
Example 6, the test ore sample is a certain copper-molybdenum ore in tibetan, the copper grade is 1.24%, the molybdenum grade is 0.072%, the metal minerals in the ore mainly include pyrite, chalcopyrite, chalcocite and molybdenite, the gangue minerals mainly include feldspar, quartz and chlorite, the molybdenite has a wide particle size range, the distribution is wide, 0.5 mm-0.02 mm, part of fine-particle-size minerals are wrapped by quartz and are difficult to dissociate, and coarse-particle-size minerals mostly form aggregates and are continuously grown with the gangue or the copper minerals.
The copper-molybdenum ore recovery process comprises the following steps:
1) grinding, namely crushing raw ore and wet-grinding to 55 percent of fineness of-0.074 mm, wherein the concentration of the ground ore is 55 percent.
2) Coarse molybdenum ore roughing: mixing the ground ore product obtained in the step 1), adding a collecting agent kerosene and a foaming agent 2 in sequence#And carrying out rough separation on the oil by using the coarse molybdenum minerals to obtain molybdenum rough concentrate 1 and molybdenum rough tailings.
3) And (3) regrinding the roughed tailings: concentrating the molybdenum rougher tailings obtained in the step 2), and wet-grinding the concentrated molybdenum rougher tailings until the fineness of the tailings is-0.074 mm and accounts for 80%, wherein the concentration of the grinded ore is 50%.
4) Copper-molybdenum mineral mixed flotation: adding the grinding product obtained in the step 3) into collecting agents of butyl xanthate, kerosene and foaming agent 2#Carrying out copper-molybdenum mineral mixed roughing and scavenging on the oil to obtain copper-molybdenum mixed rough concentrate, mixed scavenging middlings and tailings; after the mixed roughing concentrate is subjected to size mixing, adding a regulator sodium hexametaphosphate to obtain copper-molybdenum mixed concentrate and mixed roughing middlings through primary concentration; and returning the mixed scavenging middlings and the mixed concentration middlings to the mixed roughing operation.
5) Concentrating the copper-molybdenum bulk concentrate obtained by the fine selection in the step 4), and grinding the concentrated copper-molybdenum bulk concentrate until the fineness is-0.038 mm and the percentage is 95%.
6) Separating and floating copper and molybdenum minerals: mixing the ore grinding product obtained in the step 5), adding adjusting agents of sodium sulfide, sodium hexametaphosphate, collecting agent of kerosene and foaming agent 2#Carrying out rough concentration and scavenging on molybdenum minerals on the oil to obtain molybdenum rough concentrate 2, and separating scavenging middlings and copper concentrate; separating and scavenging middlings and returning to separation roughing operation.
7) Molybdenum mineral concentration: mixing the molybdenum rough concentrate 1 obtained in the step 2) and the molybdenum rough concentrate 2 obtained in the step 6), adding a regulator sodium hexametaphosphate, and carrying out concentration for 5 times to obtain molybdenum concentrate and molybdenum concentration middlings; the molybdenum first concentration middlings and the scavenging middlings are returned to 5), and other middlings are returned to the previous concentration operation in sequence.
By adopting the process, the final beneficiation indexes of the copper-molybdenum ore comprise that the copper grade of the copper concentrate is 24.07%, the copper recovery rate is 95.41%, the molybdenum grade of the molybdenum concentrate is 45.92% and the molybdenum recovery rate is 80.15%.
Example 7, the test sample was a copper-molybdenum ore of Xinjiang, with a copper grade of 0.60% and a molybdenum grade of 0.022%, the metal minerals in the ore were mainly pyrite and chalcopyrite, and then molybdenite, sphalerite, bornite and chalcocite were included, the non-metal minerals mainly included quartz, feldspar, calcite, dolomite, chlorite, diopside and garnet, the molybdenite was the main molybdenum mineral of the ore, the content was low, the disseminated grain size was not uniform, the grain size was as large as 0.2mm and as small as 0.03mm, and most of the mineral was infiltrated into the gangue, and a few of the mineral was associated with the gangue.
The copper-molybdenum ore recovery process comprises the following steps:
1) grinding, namely crushing raw ore and wet-grinding to 55 percent of fineness of-0.074 mm, wherein the concentration of the ground ore is 55 percent.
2) Coarse molybdenum ore roughing: mixing the ground ore product obtained in the step 1), adding a collecting agent kerosene and a foaming agent 2 in sequence#And carrying out rough separation on the oil by using the coarse molybdenum minerals to obtain molybdenum rough concentrate 1 and molybdenum rough tailings.
3) And (3) regrinding the roughed tailings: concentrating the molybdenum rougher tailings obtained in the step 2), and wet-grinding the concentrated molybdenum rougher tailings until the fineness is 75 percent (minus 0.074 mm), wherein the concentration of the ground ore is 50 percent.
4) Copper-molybdenum mineral mixed flotation: adding the grinding product obtained in the step 3) into collecting agents of butyl xanthate, kerosene and foaming agent 2#Carrying out copper-molybdenum mineral mixed roughing and scavenging on the oil to obtain copper-molybdenum mixed rough concentrate, mixed scavenging middlings and tailings; after the mixed roughing concentrate is subjected to size mixing, adding a regulator sodium hexametaphosphate, and performing concentration twice to obtain copper-molybdenum mixed concentrate and mixed concentration middlings; and returning the mixed scavenging middlings and the mixed concentration middlings to the mixed roughing operation.
5) Concentrating the copper-molybdenum bulk concentrate obtained by the fine selection in the step 4), and grinding the concentrated copper-molybdenum bulk concentrate until the fineness is-0.038 mm and the percentage of the concentrated copper-molybdenum bulk concentrate is 90%.
6) Separating and floating copper and molybdenum minerals: mixing the ore grinding product obtained in the step 5), adding adjusting agents of sodium sulfide, sodium hexametaphosphate, collecting agent of kerosene and foaming agent 2#Carrying out rough concentration and scavenging on molybdenum minerals on the oil to obtain molybdenum rough concentrate 2, and separating scavenging middlings and copper concentrate; separating and scavenging middlings and returning to separation roughing operation.
7) Molybdenum mineral concentration: mixing the molybdenum rough concentrate 1 obtained in the step 2) and the molybdenum rough concentrate 2 obtained in the step 6), adding a regulator sodium hexametaphosphate, and carrying out concentration for 8 times to obtain molybdenum concentrate and molybdenum concentration middlings; the molybdenum first concentration middlings and the scavenging middlings are returned to 5), and other middlings are returned to the previous concentration operation in sequence.
By adopting the process, the final mineral separation index of the copper-molybdenum ore is obtained as follows: the copper grade of the copper concentrate is 22.78 percent, the copper recovery rate is 95.11 percent, the molybdenum grade of the molybdenum concentrate is 43.02 percent, and the molybdenum recovery rate is 65.14 percent.
The above description is only for the preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present invention and the inventive concept thereof within the scope of the present invention.
Claims (2)
1. The mineral separation method for the copper-molybdenum ore with complex embedding characteristics is characterized by comprising the following steps:
step 1: grinding ore, namely crushing raw ore and then wet-grinding the crushed raw ore to the fineness of 50-60 percent with the content of 0.074 mm;
step 2: roughing coarse molybdenum minerals, namely, after the ore grinding product obtained in the step 1 is subjected to size mixing, roughing coarse molybdenum minerals to obtain molybdenum rough concentrate I and molybdenum rough tailings;
and step 3: the roughing tailings are ground again, the molybdenum roughing tailings obtained in the step 2 are concentrated and then are ground to a fineness of-0.074 mm, and the content of the molybdenum roughing tailings is 70-80%;
and 4, step 4: performing mixed flotation on the copper and molybdenum minerals, and performing rough concentration, scavenging and fine concentration on the ground mineral products obtained in the step 3 to obtain copper and molybdenum mixed concentrate and tailings;
and 5: regrinding the copper-molybdenum bulk concentrate, namely concentrating the copper-molybdenum bulk concentrate obtained by the fine selection in the step 4 and grinding the concentrated copper-molybdenum bulk concentrate to a fineness of-0.038 mm and a content of 85-90%;
step 6: separating and floating copper and molybdenum minerals, namely roughing and scavenging the ground ore product obtained in the step 5 to obtain molybdenum rough concentrate II, copper concentrate and scavenged middlings;
and 7: molybdenum mineral concentration: mixing the molybdenum rough concentrate I obtained in the step 2 and the molybdenum rough concentrate II obtained in the step 6, adding a regulator sodium hexametaphosphate, and carrying out primary concentration to obtain molybdenum rough concentrate and primary concentration middling;
and 8: returning the scavenging middlings in the step 6 and the first concentrating middlings in the step 7 to the copper-molybdenum bulk concentrate regrinding operation in the step 5;
and step 9: and (4) after the molybdenum rough concentrate obtained in the step (7) is subjected to size mixing, adding a regulator sodium hexametaphosphate, and carrying out concentration for 5-8 times to obtain molybdenum concentrate.
2. The beneficiation method for the copper-molybdenum ore with complex disseminated characteristics according to the claim 1, which is characterized in that: the concentration in the step 7 is carried out 7 times.
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| CN115025875A (en) * | 2022-06-30 | 2022-09-09 | 黑龙江多宝山铜业股份有限公司 | Flotation separation method of copper-molybdenum bulk concentrate |
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| CN115025875B (en) * | 2022-06-30 | 2023-10-27 | 黑龙江多宝山铜业股份有限公司 | Flotation separation method for copper-molybdenum bulk concentrate |
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