CN112536157B - Beneficiation method for high-carbon refractory lead-zinc ore - Google Patents
Beneficiation method for high-carbon refractory lead-zinc ore Download PDFInfo
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- CN112536157B CN112536157B CN202011299660.6A CN202011299660A CN112536157B CN 112536157 B CN112536157 B CN 112536157B CN 202011299660 A CN202011299660 A CN 202011299660A CN 112536157 B CN112536157 B CN 112536157B
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- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims abstract description 52
- JQJCSZOEVBFDKO-UHFFFAOYSA-N lead zinc Chemical compound [Zn].[Pb] JQJCSZOEVBFDKO-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 239000012141 concentrate Substances 0.000 claims abstract description 90
- 238000005188 flotation Methods 0.000 claims abstract description 53
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 48
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims abstract description 40
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 26
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 26
- 239000011707 mineral Substances 0.000 claims abstract description 26
- 235000010265 sodium sulphite Nutrition 0.000 claims abstract description 20
- VKQNRZQSJUMPOS-UHFFFAOYSA-N [Pb].[C] Chemical compound [Pb].[C] VKQNRZQSJUMPOS-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000004088 foaming agent Substances 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- QTANTQQOYSUMLC-UHFFFAOYSA-O Ethidium cation Chemical compound C12=CC(N)=CC=C2C2=CC=C(N)C=C2[N+](CC)=C1C1=CC=CC=C1 QTANTQQOYSUMLC-UHFFFAOYSA-O 0.000 claims abstract description 7
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims abstract description 7
- 229910000368 zinc sulfate Inorganic materials 0.000 claims abstract description 7
- 229960001763 zinc sulfate Drugs 0.000 claims abstract description 7
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 77
- 239000011701 zinc Substances 0.000 claims description 77
- 229910052725 zinc Inorganic materials 0.000 claims description 77
- 230000002000 scavenging effect Effects 0.000 claims description 36
- 229910000365 copper sulfate Inorganic materials 0.000 claims description 16
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims description 16
- 229910052984 zinc sulfide Inorganic materials 0.000 claims description 15
- WUOACPNHFRMFPN-UHFFFAOYSA-N alpha-terpineol Chemical compound CC1=CCC(C(C)(C)O)CC1 WUOACPNHFRMFPN-UHFFFAOYSA-N 0.000 claims description 14
- SQIFACVGCPWBQZ-UHFFFAOYSA-N delta-terpineol Natural products CC(C)(O)C1CCC(=C)CC1 SQIFACVGCPWBQZ-UHFFFAOYSA-N 0.000 claims description 14
- 229910052949 galena Inorganic materials 0.000 claims description 14
- XCAUINMIESBTBL-UHFFFAOYSA-N lead(ii) sulfide Chemical compound [Pb]=S XCAUINMIESBTBL-UHFFFAOYSA-N 0.000 claims description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- WGPCGCOKHWGKJJ-UHFFFAOYSA-N sulfanylidenezinc Chemical compound [Zn]=S WGPCGCOKHWGKJJ-UHFFFAOYSA-N 0.000 claims description 14
- 229940116411 terpineol Drugs 0.000 claims description 14
- 239000003350 kerosene Substances 0.000 claims description 11
- 229910052757 nitrogen Inorganic materials 0.000 claims description 9
- 238000000227 grinding Methods 0.000 claims description 8
- 239000004571 lime Substances 0.000 claims description 7
- -1 polyoxyethylene Polymers 0.000 claims description 7
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 6
- 239000012190 activator Substances 0.000 claims description 5
- SSFPHCKFUBEAKZ-UHFFFAOYSA-N propoxymethanedithioic acid Chemical compound CCCOC(S)=S SSFPHCKFUBEAKZ-UHFFFAOYSA-N 0.000 claims description 5
- 238000004064 recycling Methods 0.000 claims description 5
- 239000003002 pH adjusting agent Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- WVYWICLMDOOCFB-UHFFFAOYSA-N 4-methyl-2-pentanol Chemical compound CC(C)CC(C)O WVYWICLMDOOCFB-UHFFFAOYSA-N 0.000 claims description 3
- 235000012204 lemonade/lime carbonate Nutrition 0.000 claims description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 3
- 238000001238 wet grinding Methods 0.000 claims description 3
- QLNJFJADRCOGBJ-UHFFFAOYSA-N propionamide Chemical compound CCC(N)=O QLNJFJADRCOGBJ-UHFFFAOYSA-N 0.000 claims description 2
- 239000012535 impurity Substances 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 description 15
- 238000011084 recovery Methods 0.000 description 12
- 238000005261 decarburization Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 4
- 235000011941 Tilia x europaea Nutrition 0.000 description 4
- 229910052950 sphalerite Inorganic materials 0.000 description 3
- DSCFFEYYQKSRSV-UHFFFAOYSA-N 1L-O1-methyl-muco-inositol Natural products COC1C(O)C(O)C(O)C(O)C1O DSCFFEYYQKSRSV-UHFFFAOYSA-N 0.000 description 2
- VJXUJFAZXQOXMJ-UHFFFAOYSA-N D-1-O-Methyl-muco-inositol Natural products CC12C(OC)(C)OC(C)(C)C2CC(=O)C(C23OC2C(=O)O2)(C)C1CCC3(C)C2C=1C=COC=1 VJXUJFAZXQOXMJ-UHFFFAOYSA-N 0.000 description 2
- DSCFFEYYQKSRSV-KLJZZCKASA-N D-pinitol Chemical compound CO[C@@H]1[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)[C@H]1O DSCFFEYYQKSRSV-KLJZZCKASA-N 0.000 description 2
- 239000013043 chemical agent Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000008396 flotation agent Substances 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229940051841 polyoxyethylene ether Drugs 0.000 description 2
- 229920000056 polyoxyethylene ether Polymers 0.000 description 2
- DWNBOPVKNPVNQG-LURJTMIESA-N (2s)-4-hydroxy-2-(propylamino)butanoic acid Chemical compound CCCN[C@H](C(O)=O)CCO DWNBOPVKNPVNQG-LURJTMIESA-N 0.000 description 1
- KZNDFYDURHAESM-UHFFFAOYSA-N 2-chloro-n-(2-ethyl-6-methylphenyl)-n-(propan-2-yloxymethyl)acetamide Chemical compound CCC1=CC=CC(C)=C1N(COC(C)C)C(=O)CCl KZNDFYDURHAESM-UHFFFAOYSA-N 0.000 description 1
- 239000004604 Blowing Agent Substances 0.000 description 1
- 229910021532 Calcite Inorganic materials 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- GGLZPLKKBSSKCX-YFKPBYRVSA-N L-ethionine Chemical compound CCSCC[C@H](N)C(O)=O GGLZPLKKBSSKCX-YFKPBYRVSA-N 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- GGLZPLKKBSSKCX-UHFFFAOYSA-N S-ethylhomocysteine Chemical compound CCSCCC(N)C(O)=O GGLZPLKKBSSKCX-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000005083 Zinc sulfide Substances 0.000 description 1
- APYGBEXYIRZQJR-UHFFFAOYSA-N [N].C(C)[S] Chemical compound [N].C(C)[S] APYGBEXYIRZQJR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910001748 carbonate mineral Inorganic materials 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 238000005262 decarbonization Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 229910052981 lead sulfide Inorganic materials 0.000 description 1
- 229940056932 lead sulfide Drugs 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 229910052683 pyrite Inorganic materials 0.000 description 1
- 239000011028 pyrite Substances 0.000 description 1
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000012991 xanthate Substances 0.000 description 1
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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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
-
- 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
-
- 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
- B03D2201/007—Modifying reagents for adjusting pH or conductivity
-
- 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
-
- 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
-
- 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
- B03D2201/06—Depressants
-
- 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
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention provides a beneficiation method of high-carbon refractory lead-zinc ore, which relates to the technical field of mineral processing and comprises the following steps: transferring the raw ore pulp into a flotation tank, and adding a carbonaceous capture agent into the raw ore pulp to carry out carbon-lead floatation and the like; heating the mixed concentrate obtained by the floatable operation of carbon lead and the like, heating the mixed concentrate to 65-75 ℃, and separating to obtain carbon concentrate and primary lead concentrate; adding a pH regulator into tailings of the floatable steps such as carbon lead to enable the pH value of the tailings of the floatable steps such as carbon lead to be 10-11, then respectively adding zinc sulfate, sodium sulfite, a lead mineral collecting agent ethidium and a foaming agent into the tailings, and obtaining lead rough concentrate through flotation; and (3) regrinding the lead rough concentrate, adding a pH regulator to enable the pH value of the lead rough concentrate to be 10-11, and adding sodium sulfite to obtain secondary lead concentrate. The beneficiation method for the high-carbon refractory lead-zinc ore has the advantages of low impurity content of flotation concentrate, simple operation, stable flow, strong adaptability, convenience for field management and the like.
Description
Technical Field
The invention relates to the technical field of mineral processing, in particular to a beneficiation method of high-carbon refractory lead-zinc ore.
Background
How to eliminate the influence of carbon in the separation process of the carbon-containing polymetallic sulfide ore is one of the difficult problems of mineral separation research at home and abroad. Because the floatability of carbon is good, lead and zinc can be floated out together, and because the minerals are densely symbiotic and embedded with each other, certain difficulty exists in lead-zinc separation of some lead-zinc ores, and the separation effect of the lead-zinc ores can be seriously influenced by the interference of the carbon. For the impact of carbonaceous gangue, two processes are generally employed: one is decarburization in advance, and then lead-zinc flotation is carried out, so that the method has the advantages that the flotation index is relatively stable, the defects that useful minerals are easily lost, and the metal recovery rate is low; the other process is direct flotation without pre-decarburization, has the advantages that ores with low carbon content have better indexes, and has the defects that ores with high carbon content not only consume large agents, but also have unstable flotation foams, and are difficult to realize stable operation in production.
Therefore, how to provide a beneficiation method of high-carbon refractory lead-zinc ore capable of efficiently recovering mineral resources under the condition of high carbon is one of the technical problems to be solved by the technical personnel in the field.
Disclosure of Invention
The invention aims to provide a beneficiation method for high-carbon refractory lead-zinc ores, which has the advantages of low impurity rate of flotation concentrates, high recovery efficiency, simple operation, stable flow, strong adaptability, convenience in field management and the like.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a beneficiation method of high-carbon refractory lead-zinc ore, which comprises the following steps:
carbon lead and the like can float: moving the raw ore pulp into a flotation tank, and adding a carbonaceous capture agent into the raw ore pulp;
c, separating lead: heating the bulk concentrate obtained in the carbon-lead flotation step to 65-75 ℃, and separating to obtain carbon concentrate and primary lead concentrate;
asynchronous lead flotation: adding a pH regulator into the tailings in the carbon-lead and other floatable steps to enable the pH value of the tailings in the carbon-lead and other floatable steps to be 10-11, then respectively adding zinc sulfate, sodium sulfite, a lead mineral collector ethidium-nitrogen and a foaming agent into the tailings, and carrying out flotation to obtain lead rough concentrate;
lead concentration: and (3) regrinding the lead rough concentrate, adding the pH regulator to enable the pH value of the lead rough concentrate to be 10-11, and adding sodium sulfite to obtain secondary lead concentrate.
Further, the beneficiation method of the high-carbon refractory lead-zinc ore further comprises the following steps:
lead scavenging: adding sodium sulfite and ethidium and nitrogen into the tailings of the lead asynchronous flotation step for scavenging at least once, and floating the refractory and undissociated galena intergrowths;
roughing zinc: adding the pH regulator into the tailings in the lead scavenging step to enable the pH value of the tailings in the lead scavenging step to be 12-13, then sequentially adding a zinc blende activator copper sulfate, a zinc blende collector propylxanthate and the foaming agent, and obtaining zinc rough concentrate through flotation;
zinc fine selection: and regrinding the zinc rough concentrate, adding the pH regulator to enable the pH value of the zinc rough concentrate to be 12-13, and adding copper sulfate to obtain the zinc concentrate.
Further, the beneficiation method of the high-carbon refractory lead-zinc ore further comprises the following steps:
zinc scavenging: and adding copper sulfate and a propylxanthate into the tailings in the zinc roughing step for scavenging at least once, and floating the zinc blende intergrowth which is difficult to float and is not dissociated.
Further, after the zinc concentration step, recycling to the zinc roughing step at least once;
and after the zinc scavenging step, circulating the zinc roughing step at least once.
Further, the carbonaceous capture agent comprises kerosene, terpineol oil and alkylphenol polyoxyethylene, wherein the mass ratio of the kerosene, the terpineol oil and the alkylphenol polyoxyethylene is (30-50): 60-75: 10 to 20.
Further, the carbonaceous capturing agent is prepared by mixing the kerosene, the terpineol oil and the alkylphenol polyoxyethylene and then stirring the mixture for 30 to 60 minutes at normal temperature and normal pressure.
Further, after the lead concentration step, the lead is recycled at least once to the lead asynchronous flotation step.
Further, before the step of making the carbon lead and the like float, the method also comprises the following steps:
grinding: and (3) carrying out wet grinding on the ore until the fineness reaches 80-90% of the ore with the fineness of-200 meshes, thus obtaining the raw ore pulp.
Further, the pH regulator is lime or sodium carbonate.
Further, the foaming agent is terpineol oil or methyl isobutyl carbinol.
The beneficiation method for the high-carbon refractory lead-zinc ore provided by the invention has the following beneficial effects:
in the beneficiation method of the high-carbon refractory lead-zinc ore, firstly, a carbonaceous capture agent is added into raw ore pulp in a flotation tank; heating the mixed concentrate obtained in the carbon-lead floatation step to 65-75 ℃, and separating to obtain carbon concentrate and primary lead concentrate; adding a pH regulator into floatable tailings such as carbon lead and the like to enable the pH value of the tailings to be 10-11, then respectively adding zinc sulfate, sodium sulfite, a lead mineral collecting agent ethionin and a foaming agent into the tailings, obtaining lead rough concentrate through flotation, and strengthening flotation recovery of minerals; and finally, regrinding the lead rough concentrate, adding a pH regulator into the reground lead rough concentrate, adjusting the pH value of the lead rough concentrate to 10-11, and then adding sodium sulfite for concentration for multiple times to obtain secondary lead concentrate.
Compared with the prior art, the beneficiation method of the high-carbon refractory lead-zinc ore provided by the invention fully utilizes the characteristics of carbonaceous gangue and the floatability of the easily-floated galena, heats the ore pulp of floatable concentrates such as carbon lead and the like, selectively desorbs the flotation agent on the surface of the galena under a certain temperature condition, thereby realizing the separation of the carbon lead minerals to obtain primary lead concentrate, does not need to use a regulator, reduces the pollution of chemical agents to the environment, simultaneously separates lead rough concentrate by an asynchronous flotation method, obtains secondary lead concentrate by a lead concentration step, has low impurity rate, realizes the efficient recycling of high-carbon refractory lead-zinc ore resources, and has the advantages of simple operation, stable flow, strong adaptability, convenience for field management and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a process flow chart of a beneficiation method of high-carbon refractory lead-zinc ore provided by an embodiment of the invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
The embodiment provides a beneficiation method for high-carbon refractory lead-zinc ore, as shown in fig. 1, including:
carbon lead and the like can float: moving the raw ore pulp into a flotation tank, and adding a carbonaceous capture agent into the raw ore pulp;
c, separating lead: heating the bulk concentrate obtained in the floatable steps such as carbon lead, heating the bulk concentrate to 65-75 ℃, and separating to obtain carbon concentrate and primary lead concentrate;
asynchronous lead flotation: adding a pH regulator into tailings of the floatable steps such as carbon lead to enable the pH value of the tailings of the floatable steps such as carbon lead to be 10-11, then respectively adding zinc sulfate, sodium sulfite, a lead mineral collecting agent ethidium and a foaming agent into the tailings, and obtaining lead rough concentrate through flotation;
lead concentration: and (3) regrinding the lead rough concentrate, adding a pH regulator to enable the pH value of the lead rough concentrate to be 10-11, and adding sodium sulfite to obtain secondary lead concentrate.
In the step of floatability of carbon lead and the like, 30-50 g/t of carbonaceous capture agent can be added into the raw ore pulp, and specifically 30g/t, 35g/t, 40g/t, 4/5g/t, 50g/t and the like of the carbonaceous capture agent can be added into the raw ore pulp.
In the carbon-lead separation step, the bulk concentrate may be heated to 65 ℃, 70 ℃, 75 ℃ and the like, and carbon-lead separation may be performed at the temperature.
In order to effectively sort out lead rough concentrates in tailings of floatable steps such as carbon lead and the like, in the lead asynchronous flotation step, the pH value of the tailings of the floatable steps such as carbon lead and the like can be adjusted to 10, 10.5, 11 and the like. In addition, the dosage of zinc sulfate as zinc blende inhibitor is 1500-2500 g/t, specifically 1500g/t, 2000g/t, 2500g/t, etc.; the dosage of the sodium sulfite is 500-1500 g/t, and specifically 500g/t, 1000g/t, 1500g/t and the like; the dosage of the lead mineral collector ethidium-sulfur-nitrogen is 50-100g/t, and specifically can be 50g/t, 70g/t, 80g/t, 100g/t and the like; the amount of the foaming agent is 20 to 50g/t, and specifically, it may be 20g/t, 35g/t, 40g/t, 50g/t, or the like.
In the lead concentration step, in order to fully dissociate lead-containing minerals in the lead rough concentrate, the lead rough concentrate is ground again until the proportion of the lead rough concentrate with the fineness of-38 um is 85-95%, and then a pH regulator is added. The specific ratio may be 85%, 90%, 95%, etc. After the addition of the pH adjusting agent, the pH of the lead rough concentrate may be adjusted to 10, 10.5, 11, etc. In addition, the amount of sodium sulfite is 100-300 g/t, specifically 100g/t, 200g/t, 300g/t, etc.
In some embodiments, in order to further sort out zinc concentrate, as shown in fig. 1, the beneficiation method for high-carbon refractory lead-zinc ore further includes:
lead scavenging: adding sodium sulfite and ethidium and nitrogen into tailings in the lead asynchronous flotation step for scavenging at least once, and floating galena intergrowth which is difficult to float and is not dissociated;
roughing zinc: adding a pH regulator into the tailings in the lead scavenging step to enable the pH value of the tailings in the lead scavenging step to be 12-13, then sequentially adding a sphalerite activator copper sulfate, a sphalerite collector propanamide and a foaming agent, and obtaining zinc rough concentrate through flotation;
zinc fine selection: and (3) regrinding the zinc rough concentrate, adding a pH regulator to enable the pH value of the zinc rough concentrate to be 12-13, and adding copper sulfate to obtain the zinc concentrate.
In the lead scavenging step, the using amount of sodium sulfite is 50-200 g/t, specifically 50g/t, 100g/t, 200g/t and the like; the dosage of the ethidium and nitrogen is 10-30 g/t, and specifically can be 10g/t, 20g/t, 30g/t and the like. After sodium sulfite and ethidium and nitrogen are added, scavenging can be carried out for 1-2 times, and the difficult-to-float and undissociated galena intergrowth can be floated.
And after the lead scavenging step is finished and the lead is recycled to the lead asynchronous flotation step, the lead asynchronous flotation step and the lead scavenging step are carried out again, and the lead scavenging step is cycled for twice, three times, four times and the like for multiple times to respectively float the difficult-to-float and undissociated galena intergrowths.
Wherein, in the zinc roughing step, the pH value of the tailings in the lead scavenging step can be adjusted to 12, 12.5, 13 and the like by the pH adjusting agent. The dosage of the zinc blende activator copper sulfate is 300-800 g/t, and specifically can be 300g/t, 500g/t, 600g/t, 800g/t, and the like; the usage amount of the zinc blende collecting agent propisochlor is 60-100 g/t, and specifically can be 60g/t, 70g/t, 80g/t, 100g/t and the like; the amount of the foaming agent is 10-30 g/t, specifically 10g/t, 20g/t, 30g/t, and the like.
In the zinc concentration step, in order to fully dissociate zinc-containing minerals in the zinc rough concentrate, the zinc rough concentrate is reground until the proportion of the zinc rough concentrate with the fineness of-38 um is 80-90%, and then a pH regulator is added. The specific ratio may be 80%, 85%, 90%, etc. After the addition of the pH adjusting agent, the pH of the zinc rough concentrate can be adjusted to 12, 12.5, 13, etc. In addition, the dosage of the copper sulfate is 10-30 g/t, and specifically 10g/t, 20g/t, 30g/t, and the like.
In some embodiments, the beneficiation method for the high-carbon refractory lead-zinc ore further comprises:
zinc scavenging: and adding copper sulfate and a propylxanthate into tailings in the zinc roughing step for scavenging at least once, and floating the zinc blende intergrowth which is difficult to float and is not dissociated.
Wherein the dosage of the copper sulfate is 5-20 g/t, and specifically can be 5g/t, 10g/t, 20g/t and the like; the dosage of the propylhomoserin is 5-20 g/t, and specifically can be 5g/t, 10g/t, 20g/t and the like. Adding copper sulfate and propylxanthate, and scavenging for 1-2 times.
In some embodiments, after the zinc beneficiation step, the zinc roughing step is recycled at least once; and after the zinc scavenging step, circulating at least once to the zinc roughing step.
After the zinc concentration step is finished, the zinc roughing step and the zinc concentration step are carried out again after the zinc roughing step is circularly returned, and zinc concentrate is obtained after the zinc roughing step and the zinc concentration step are circularly carried out for a plurality of times such as two times, three times, four times and the like; and after the zinc scavenging step is finished, circulating the zinc roughing step, then performing the zinc scavenging step again, circulating for two times, three times, four times and the like, and respectively floating the zinc blende intergrowths which are difficult to float and are not dissociated.
In some embodiments, the capture agent comprises kerosene, terpineol oil and alkylphenol polyoxyethylene ether, wherein the mass ratio of the kerosene, the terpineol oil and the alkylphenol polyoxyethylene ether is 30-50: 60-75: 10 to 20. The carbonaceous trapping agent has a good collecting effect on carbon, a good decarburization effect and stable properties, and can efficiently float out carbonaceous gangue.
Specifically, the mass ratio of the kerosene, the terpineol oil and the alkylphenol ethoxylates may be 30: 60: 10. 40: 70: 15. 50: 75: 20, and so on.
In some embodiments, the carbonaceous capture agent is prepared by mixing kerosene, terpineol oil and alkylphenol ethoxylates and stirring for 30-60 minutes at normal temperature and pressure. Specifically, stirring may be carried out for 30 minutes, 40 minutes, 50 minutes, 60 minutes, or the like.
In some embodiments, the lead beneficiation step is followed by at least one cycle back to the lead asynchronous flotation step.
And after the lead concentration step is finished and the lead is recycled to the lead asynchronous flotation step, the lead asynchronous flotation step and the lead concentration step are carried out again, and secondary lead concentrate is obtained after the lead is recycled for twice, three times, four times and the like.
In some embodiments, the carbon lead and the like floating step further comprises: grinding: and (3) carrying out wet grinding on the ore until the fineness reaches 80-90% of the ore with the fineness of-200 meshes to obtain raw ore pulp, so that useful minerals in the raw ore pulp can be effectively separated in the subsequent treatment process.
Specifically, the proportion of the ore with the fineness of-200 meshes can be 80%, 85%, 90% and the like.
Wherein, the pH regulator can be lime or sodium carbonate.
In addition, the blowing agent may be terpineol oil or methyl isobutyl carbinol.
The ore dressing method for the high-carbon lead-zinc ore difficult to separate provided by the invention adopts a novel high-efficiency carbonaceous collecting agent for decarburization, carries out carbon-lead flotation separation by heating ore pulp, and respectively recovers galena with different floatability by applying an asynchronous flotation method. The technological process of 'carbon lead and the like floatable-heating separation-asynchronous lead selection-lead and zinc preferential flotation' effectively improves the mineral separation index of metal minerals, realizes the efficient recycling of high-carbon refractory lead and zinc ore resources, and has the advantages of simple operation, stable process, strong adaptability, convenience for field management and the like.
The following describes the beneficiation method of the high-carbon refractory lead-zinc ore by using a specific example:
lead and zinc sulfide ore is rich, but due to the complex nature and high carbon content of the ore, the recovery rate of valuable metals is low, and the mineral separation production index is not ideal all the time. The main metal minerals in the ore comprise pyrite, sphalerite, galena and the like, and the non-metal gangue mainly comprises quartz and mica, and then comprises graphite, calcite and clay minerals. Among them, carbon is mainly present in graphite, and is secondarily present in carbonate minerals. The ore contains 1.67% of lead, 11.50% of zinc, 14.42% of sulfur and 3.68% of carbon.
The ore dressing method for the high-carbon refractory lead-zinc ore specifically comprises the following steps:
(1) grinding: crushing the ore to 2mm, adding the crushed ore into a conical ball mill for grinding the ore, wherein the grinding concentration is 60 percent, and the grinding fineness is 85 percent of-0.074 mm;
(2) carbon lead and the like can float: transferring the raw ore pulp into a flotation tank, and adding 35g/t of carbonaceous collecting agent into the raw ore pulp to perform floatable operation such as carbon, lead and the like;
(3) c, separating lead: heating the bulk concentrates obtained in the floatable step such as carbon-lead, and the like, and separating carbon from lead under the condition that the temperature of the bulk concentrates is 70 ℃ to respectively obtain carbon concentrates containing 33.72% of carbon and with the carbon removal rate of 68.35% and primary lead concentrates containing 36.15% of lead and with the lead recovery rate of 8.52%;
(4) asynchronous lead flotation: adding lime into tailings of the floatable step such as carbon lead to adjust the pH value of ore pulp to 10.5; then zinc sulfate, sodium sulfite, lead mineral collecting agent ethyl sulfur nitrogen and foaming agent pinitol oil are respectively added, the dosage is 2000g/t, 1000g/t, 80g/t and 35g/t, and lead rough concentrate is obtained through flotation;
(5) lead scavenging: adding 100g/t of sodium sulfite and 20g/t of ethidium-sulfur-nitrogen into tailings in the lead asynchronous flotation step for scavenging for 1-2 times, floating the intergrowth of the galena which is difficult to float and is not dissociated, and returning to the lead asynchronous flotation step;
(6) lead concentration: grinding the lead rough concentrate until the lead rough concentrate accounts for 90 percent below-38 mu m, adding lime to adjust the pH value of the ore pulp to be 10.5 and the sodium sulfite to be 200g/t, concentrating for 3 times, and returning the middling sequence of the concentration operation to the previous lead asynchronous flotation step to obtain secondary lead concentrate containing lead 53.50 percent and having lead recovery rate of 78.95 percent; the total lead concentrate (primary lead concentrate and secondary lead concentrate) contains 51.81 percent of lead and the lead recovery rate is 87.47 percent;
(7) roughing zinc: adding lime into the lead scavenging tailings to adjust the pH value of the ore pulp to 12.5; then adding zinc blende activator copper sulfate 500 g/t; the zinc blende collector is 80g/t of propyl xanthate; 20g/t of foaming agent pine alcohol oil, and obtaining zinc rough concentrate through flotation;
(8) zinc scavenging: adding 10g/t of copper sulfate and 10g/t of an alanate into tailings in the zinc roughing step, carrying out scavenging for 1-2 times, floating zinc blende intergrowths which are difficult to float and are not dissociated yet, and returning to the last zinc roughing step after the zinc scavenging step is finished;
(9) zinc fine selection: and (3) regrinding the zinc rough concentrate until the zinc rough concentrate accounts for 85 percent of minus 38um, adding lime to adjust the pH value of the ore pulp to be 12.5 and the copper sulfate to be 15g/t, carrying out concentration for 3 times, and returning the middling sequence in the concentration operation to the last zinc rough concentration step to obtain the zinc concentrate containing 49.55 percent of zinc and having 92.35 percent of zinc recovery.
For comparison, for the high-carbon refractory lead-zinc ore, the pinitol oil is used as the carbonaceous collecting agent for pre-decarburization, and lead concentrate containing 45.38% of lead and 72.51% of lead recovery rate is obtained through a lead-zinc preferential flotation process flow; the zinc concentrate containing 43.27 percent of zinc and 83.64 percent of zinc recovery rate has obviously lower index than the lead-zinc beneficiation index obtained by the invention.
Therefore, the beneficiation method for the high-carbon refractory lead-zinc ore provided by the invention has a good treatment effect on the high-carbon refractory lead-zinc ore, so that lead and zinc can be fully recovered, and the comprehensive utilization level of mineral resources is improved.
In conclusion, the beneficiation method and the beneficiation system for the high-carbon refractory lead-zinc ore provided by the invention have the following advantages:
1. the recovery method mainly comprises two steps: the first step is that in the decarbonization process, part of the easy-to-float galena floats out along with the carbonaceous gangue, and a heating method is adopted to carry out carbon-lead separation to obtain primary lead concentrate; and secondly, adding ethionine into the decarbonized tailings to strengthen the flotation recovery of the lead ore difficult to float, and concentrating the rough concentrate to obtain secondary lead concentrate.
2. The method makes full use of the characteristics of carbonaceous gangue and the floatability of the easily-floated galena, heats ore pulp of floatable concentrate such as carbon lead and the like, and selectively desorbs the flotation agent on the surface of the galena at the temperature of 65-75 ℃, so that the separation of carbon lead minerals is realized, no regulator is needed, the pollution of chemical agents to the environment is reduced, and the method is an environment-friendly flotation separation method.
3. According to the mass fraction, the carbonaceous collecting agent contains three components of kerosene, terpineol oil and alkylphenol polyoxyethylene, and the mass ratio of the three components is 30-50: 60-75: 10-20. the carbonaceous collecting agent has a good collecting effect on carbon, is good in decarburization effect and stable in property, and can efficiently float out carbonaceous gangue.
The ore dressing method for the high-carbon lead-zinc ore difficult to separate provided by the invention adopts a novel high-efficiency carbonaceous collecting agent for decarburization, carries out carbon-lead flotation separation by an ore pulp heating method, and respectively recovers galena with different floatability by applying an asynchronous flotation method. The technological process of 'carbon lead and the like floatable-heating separation-asynchronous lead selection-lead and zinc preferential flotation' effectively improves the mineral separation index of metal minerals, realizes the efficient recycling of high-carbon refractory lead and zinc ore resources, and has the advantages of simple operation, stable process, strong adaptability, convenience for field management and the like.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the spirit of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. A beneficiation method for high-carbon refractory lead-zinc ore comprises the following steps:
carbon lead and the like can float: moving the raw ore pulp into a flotation tank, and adding a carbonaceous capture agent into the raw ore pulp;
c, separating lead: heating the bulk concentrate obtained in the carbon-lead flotation step to 65-75 ℃, and separating to obtain carbon concentrate and primary lead concentrate;
asynchronous lead flotation: adding a pH regulator into the tailings in the carbon-lead and other floatable steps to enable the pH value of the tailings in the carbon-lead and other floatable steps to be 10-11, then respectively adding zinc sulfate, sodium sulfite, a lead mineral collector ethidium-nitrogen and a foaming agent into the tailings, and carrying out flotation to obtain lead rough concentrate;
lead concentration: the lead rough concentrate is reground, the pH regulator is added to enable the pH value of the lead rough concentrate to be 10-11, and sodium sulfite is added to obtain secondary lead concentrate;
the carbonaceous capture agent comprises kerosene, terpineol oil and alkylphenol polyoxyethylene, and the mass ratio of the kerosene, the terpineol oil and the alkylphenol polyoxyethylene is 30-50: 60-75: 10-20.
2. The beneficiation method for the high-carbon refractory lead-zinc ore according to claim 1, characterized by further comprising:
lead scavenging: adding sodium sulfite and ethidium and nitrogen into the tailings of the lead asynchronous flotation step for scavenging at least once, and floating the refractory and undissociated galena intergrowths;
roughing zinc: adding the pH regulator into the tailings in the lead scavenging step to enable the pH value of the tailings in the lead scavenging step to be 12-13, then sequentially adding a zinc blende activator copper sulfate, a zinc blende collector propanamide and the foaming agent, and obtaining zinc rough concentrate through flotation;
zinc fine selection: and regrinding the zinc rough concentrate, adding the pH regulator to enable the pH value of the zinc rough concentrate to be 12-13, and adding copper sulfate to obtain the zinc concentrate.
3. The beneficiation method for the high-carbon refractory lead-zinc ore according to claim 2, characterized by further comprising:
zinc scavenging: and adding copper sulfate and a propylxanthate into the tailings in the zinc roughing step for scavenging at least once, and floating the zinc blende intergrowth which is difficult to float and is not dissociated.
4. The beneficiation method for high-carbon refractory lead-zinc ores according to claim 3, wherein the zinc concentration step is followed by at least one recycling to the zinc roughing step;
and after the zinc scavenging step, circulating the zinc roughing step at least once.
5. The beneficiation method for the high-carbon refractory lead-zinc ore according to claim 1, wherein the carbonaceous capturing agent is prepared by mixing the kerosene, the terpineol oil and the alkylphenol ethoxylates and stirring for 30-60 minutes at normal temperature and normal pressure.
6. The method for beneficiation of high-carbon refractory lead-zinc ore according to claim 1, wherein the lead concentration step is followed by at least one cycle back to the lead asynchronous flotation step.
7. The beneficiation method for the high-carbon refractory lead-zinc ore according to claim 1, characterized by comprising the following steps before the step of enabling the carbon, the lead and the like to float:
grinding: and (3) carrying out wet grinding on the ore until the fineness reaches 80-90% of the ore with the fineness of-200 meshes, thus obtaining the raw ore pulp.
8. The method for beneficiation of high-carbon refractory lead-zinc ore according to claim 1 or 2, wherein the pH adjusting agent is lime or sodium carbonate.
9. The method for beneficiation of high-carbon refractory lead-zinc ore according to claim 1 or 2, wherein the foaming agent is terpineol oil or methyl isobutyl carbinol.
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