CN112718233A - Method for comprehensively recovering copper minerals and iron minerals from copper converter slag - Google Patents
Method for comprehensively recovering copper minerals and iron minerals from copper converter slag Download PDFInfo
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- CN112718233A CN112718233A CN202011598996.2A CN202011598996A CN112718233A CN 112718233 A CN112718233 A CN 112718233A CN 202011598996 A CN202011598996 A CN 202011598996A CN 112718233 A CN112718233 A CN 112718233A
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- 239000010949 copper Substances 0.000 title claims abstract description 67
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 56
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 229910001779 copper mineral Inorganic materials 0.000 title claims abstract description 43
- 239000002893 slag Substances 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 33
- 229910001608 iron mineral Inorganic materials 0.000 title claims abstract description 18
- 239000012141 concentrate Substances 0.000 claims abstract description 61
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 51
- 230000002000 scavenging effect Effects 0.000 claims abstract description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052814 silicon oxide Inorganic materials 0.000 claims abstract description 4
- 238000005188 flotation Methods 0.000 claims description 24
- 229910052742 iron Inorganic materials 0.000 claims description 21
- 239000006148 magnetic separator Substances 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 12
- 239000010665 pine oil Substances 0.000 claims description 12
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 10
- TUZCOAQWCRRVIP-UHFFFAOYSA-N butoxymethanedithioic acid Chemical compound CCCCOC(S)=S TUZCOAQWCRRVIP-UHFFFAOYSA-N 0.000 claims description 9
- 235000019353 potassium silicate Nutrition 0.000 claims description 5
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 5
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 5
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 5
- 229910052979 sodium sulfide Inorganic materials 0.000 claims description 5
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000011084 recovery Methods 0.000 description 17
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 230000005389 magnetism Effects 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 229910052593 corundum Inorganic materials 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 235000010755 mineral Nutrition 0.000 description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 2
- 238000007885 magnetic separation Methods 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 229910052840 fayalite Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 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
- B03B9/04—General arrangement of separating plant, e.g. flow sheets specially adapted for furnace residues, smeltings, or foundry slags
-
- 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
- B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/005—Preliminary treatment of scrap
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B15/00—Obtaining copper
- C22B15/0002—Preliminary treatment
- C22B15/0004—Preliminary treatment without modification of the copper constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/04—Working-up slag
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- 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
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Abstract
The invention provides a method for comprehensively recovering copper minerals and iron minerals from copper converter slag, which comprises the following nine steps of I-grade ore grinding classification, magnetic roughing concentrate regrinding, magnetic concentration, roughing, II-grade regrinding, roughing II, secondary concentration and secondary scavenging, wherein the copper converter slag comprises, by mass, 3.1-6.2% of Cu, 42.1-50.9% of Fe, 218.5-22.5% of SiOx, 0.60-0.72% of Al2O30, 0.08-0.18% of CaO, 0.1-0.25% of MgO, 2.5-4.18% of Zn and 0.1-0.46% of S.
Description
Technical Field
The invention relates to a method for treating copper converter slag, in particular to a method for comprehensively recovering copper minerals and iron minerals from the copper converter slag.
Background
Mineral resources are the important material basis for the continuous increase of national economy, and the development of the human society increasingly demands the mineral resources. The solid waste is the only potential resource and wealth which are continuously increased in the world at present, so that the development and utilization of the solid waste have wide economic benefits and social benefits.
The copper smelting slag contains a large amount of valuable elements such as copper, iron and the like, and is an important secondary resource. With the development of social economy, the consumption of copper metal in China is rapidly increased, and the copper yield is the first in the world for many years. The quantity of copper furnace slag is also increased year by year, about 2000 million tons of copper furnace slag are produced in average year, about 30 million tons of metal copper are contained in the slag, 1000 million tons of metal iron and other valuable elements are contained in the slag, and the copper furnace slag has higher resource value and economic value. The non-ferrous holy land produces about 120 million tons of electrolytic copper every year, 30 million tons of converter slag every year, average copper content is about 5.0 percent, and copper metal amount is about 1.5 million tons, so that the non-ferrous holy land has higher economic value.
The converter slag mainly contains recoverable elements of copper and iron, wherein copper minerals mainly comprise copper matte and metal copper; the iron mineral is mainly composed of iron of magnetic iron and iron of silicate iron, the magnetic iron has magnetism, and the silicate iron has no magnetism basically. The copper mineral in the converter slag has uneven embedded granularity, and part of the copper mineral has thicker embedded granularity; the symbiotic relationship of part of copper minerals, the fayalite phase and the amorphous phase is close, and a small amount of copper minerals are wrapped in magnetite in a monomer form or are exposed and interground with the magnetite. The copper mineral in the converter slag has uneven embedded granularity and needs to adopt a stage grinding stage sorting process; the magnetic mineral in the converter slag has relatively fine granularity which is mainly distributed between 0.01-0.043 mm in size fraction, and qualified iron ore concentrate can be obtained only by fine grinding.
Disclosure of Invention
The invention aims to provide a method for comprehensively recovering copper minerals and iron minerals from copper converter slag, which has the advantages of simple process flow, convenience in operation and high copper and iron recovery rate.
The technical scheme adopted by the invention is as follows: a method for comprehensively recovering copper minerals and iron minerals from copper converter slag comprises the following steps:
(1) grade I ore grinding and grading: crushing copper converter slag which comprises 3.1-6.2% of Cu, 42.1-50.9% of Fe, 218.5-22.5% of SiOx, 0.60-0.72% of Al2O30, 0.08-0.18% of CaO, 0.1-0.25% of MgO, 2.5-4.18% of Zn and 0.1-0.46% of S to-2 mm by mass percent, and feeding the crushed copper converter slag into an I-grade ore grinding classification system consisting of a ball mill I and a classification I process for grinding, so that the fineness of the copper converter slag is required to be-0.074 mm and accounts for 75%;
(2) magnetic roughing: sending the copper converter slag obtained by the grade I ore grinding classification system in the step (1) into a magnetic separator I for magnetic roughing to obtain magnetic rough concentrate and magnetic tailings, so as to obtain the magnetic rough concentrate and the magnetic rough tailings;
(3) regrinding magnetic rough concentrate: feeding the magnetic rough concentrate obtained in the step (2) into a II-grade ore grinding grading system for grading and regrinding, wherein the product fineness is required to be 85% of-0.037 mm;
(4) magnetic selection: feeding the magnetic rough concentrate reground in the step (3) into a magnetic separator II for magnetic concentration to obtain magnetic concentrate and magnetic concentration tailings, wherein the magnetic concentrate is iron concentrate; feeding the magnetic concentration tailings into a second-stage flotation operation to recover fine-grained copper minerals;
(5) coarse selection I: sending the magnetic roughing tailings obtained in the step (2) to a roughing I procedure, adding 10g/t of butyl xanthate and 10g/t of pine oil respectively, sending the mixture to a flotation machine for flotation, and obtaining roughing I concentrate and roughing I tailings respectively;
(6) and II, grading and regrinding: feeding the rough selection I tailings obtained in the step (5) into a grade II grinding classification system consisting of a ball mill II and a classification II procedure for grinding, so that the fineness requirement of the rough selection I tailings is 85% when the fineness requirement is-0.044 mm;
(7) and (4) rough selection II: sending the graded overflow product obtained in the step (6) into a roughing II process, adding a combined regulator, a combined collecting agent and pine oil, and sending the mixture into a flotation machine for flotation to respectively obtain roughing II concentrate and roughing II tailings;
(8) secondary selection: sending the rough concentration II concentrate into the fine concentration I operation to obtain fine concentration
Concentrate and first tailing of choice, first tailing of choice returns to second section and grades and reground operation; the fine selection I concentrate is sent to the fine selection
Performing operation, wherein the obtained concentration II concentrate is copper concentrate, and the obtained concentration II tailings return to the operation of the concentration I;
(9) secondary scavenging: adding 10g/t of butyl xanthate and 10g/t of pine oil into the rougher II tailings, sending the mixture to a flotation machine for scavenging I operation to obtain middling 1 and scavenging I tailings respectively, and returning the middling 1 to the rougher II; and adding 10g/t of butyl xanthate and 10g/t of pine oil into the scavenged I tailings, sending the mixture into a flotation machine to perform scavenged II operation to respectively obtain middlings 2 and tailings, returning the middlings 2 to the scavenged I operation, and discarding the tailings.
By adopting the technical scheme, according to the difference of magnetism and embedded granularity of the copper minerals and the iron minerals, the copper minerals and the iron minerals are separated by adopting a magnetic separation process and then are respectively reground and separated again to obtain the copper minerals and the iron minerals; the magnetic concentration tailings contain part of micro-fine particle copper minerals, and the magnetic concentration tailings are merged into two-stage flotation operation to recover the copper minerals, so that the recovery rate of the copper minerals is improved; the rough concentration I concentrate has relatively coarse granularity and better floatability, the rough concentration I concentrate is merged into one fine concentration operation, and the copper minerals easy to float in the rough concentration I concentrate have a bearing effect on the micro-fine copper minerals, so that the recovery rate of the copper minerals is improved; and the fine I tailings and the middling 1 contain part of coarse-grained copper minerals, and the fine I tailings and the middling 1 are fed into grading regrinding operation to regrind part of the coarse-grained copper minerals, so that the improvement of the grade and the recovery rate of the copper concentrate is facilitated.
Preferably, the magnetic field strength of the magnetic separator I in the step (2) is 4000 gausses.
Preferably, the magnetic field strength of the magnetic separator II in the step (4) is 2000 Gauss.
Preferably, the combined regulator in the step (7) is formed by combining sodium sulfide, sodium bicarbonate and water glass according to the mass ratio of 1:3:5, so that the stability of flotation and the recovery of copper minerals are facilitated.
In conclusion, the beneficial effects of the invention are as follows: the technical scheme adopted by the invention has simple process flow,
Convenient operation and high recovery rate of copper and iron.
Drawings
FIG. 1 is a schematic diagram of the process of the present invention.
Detailed Description
The invention is further illustrated below with reference to process diagrams and examples:
a method for comprehensively recovering copper minerals and iron minerals from copper converter slag comprises the following steps:
(1) grade I ore grinding and grading: crushing copper converter slag which comprises 3.1-6.2% of Cu, 42.1-50.9% of Fe, 218.5-22.5% of SiOx, 0.60-0.72% of Al2O30, 0.08-0.18% of CaO, 0.1-0.25% of MgO, 2.5-4.18% of Zn and 0.1-0.46% of S to-2 mm by mass percent, and feeding the crushed copper converter slag into an I-grade ore grinding classification system consisting of a ball mill I and a classification I process for grinding, so that the fineness of the copper converter slag is required to be-0.074 mm and accounts for 75%;
(2) magnetic roughing: sending the copper converter slag obtained by the grade I ore grinding classification system in the step (1) into a magnetic separator I for magnetic roughing to obtain magnetic rough concentrate and magnetic tailings, so as to obtain the magnetic rough concentrate and the magnetic rough tailings;
(3) regrinding magnetic rough concentrate: feeding the magnetic rough concentrate obtained in the step (2) into a II-grade ore grinding grading system for grading and regrinding, wherein the product fineness is required to be 85% of-0.037 mm;
(4) magnetic selection: feeding the magnetic rough concentrate reground in the step (3) into a magnetic separator II for magnetic concentration to obtain magnetic concentrate and magnetic concentration tailings, wherein the magnetic concentrate is iron concentrate; feeding the magnetic concentration tailings into a second-stage flotation operation to recover fine-grained copper minerals;
(5) coarse selection I: sending the magnetic roughing tailings obtained in the step (2) to a roughing I procedure, adding 10g/t of butyl xanthate and 10g/t of pine oil respectively, sending the mixture to a flotation machine for flotation, and obtaining roughing I concentrate and roughing I tailings respectively;
(6) and II, grading and regrinding: feeding the rough selection I tailings obtained in the step (5) into a grade II grinding classification system consisting of a ball mill II and a classification II procedure for grinding, so that the fineness requirement of the rough selection I tailings is 85% when the fineness requirement is-0.044 mm;
(7) and (4) rough selection II: sending the graded overflow product obtained in the step (6) into a roughing II process, adding a combined regulator, a combined collecting agent and pine oil, and sending the mixture into a flotation machine for flotation to respectively obtain roughing II concentrate and roughing II tailings;
(8) secondary selection: sending the rough concentration II concentrate into the fine concentration I operation to obtain fine concentration
Concentrate and first tailing of choice, first tailing of choice returns to second section and grades and reground operation; the fine selection I concentrate is sent to the fine selection
Performing operation, wherein the obtained concentration II concentrate is copper concentrate, and the obtained concentration II tailings return to the operation of the concentration I;
(9) secondary scavenging: adding 10g/t of butyl xanthate and 10g/t of pine oil into the rougher II tailings, sending the mixture to a flotation machine for scavenging I operation to obtain middling I tailings and scavenging I tailings respectively, and returning the middling 1 to the rougher II; and adding 10g/t of butyl xanthate and 10g/t of pine oil into the scavenged I tailings, sending the mixture into a flotation machine to perform scavenged II operation to respectively obtain middlings 2 and tailings, returning the middlings 2 to the scavenged I operation, and discarding the tailings.
The first embodiment,
Comprises the components of 4.5 percent of Cu, 49.6 percent of Fe and SiO by mass percentage2 18.5％，Al2O3 0.72 percent of copper converter slag, 0.18 percent of CaO, 0.25 percent of MgO, 3.5 percent of Zn and 0.26 percent of S, and operating according to the steps, wherein the magnetic field intensity of the magnetic separator I is 4000 gausses, and the magnetic field intensity of the magnetic separator II is 2000 gausses; the combined regulator in the step (7) is formed by combining sodium sulfide, sodium bicarbonate and water glass according to the mass ratio of 1:3: 5. After analysis: the mass content of Fe in the obtained iron ore concentrate is 60.5 percent, and the recovery rate of Fe is 69.9 percent; the mass content of Cu in the copper concentrate is 27.8%, and the recovery rate of Cu is 93.1%.
Example II,
Comprises the components of 5.6 percent of Cu, 49.8 percent of Fe and SiO by mass percentage2 20.5％，Al2O3 0.68 percent of copper converter slag, 0.08-0.18 percent of CaO, 0.15 percent of MgO, 3.5 percent of Zn and 0.16 percent of S, according to the steps, wherein the magnetic field intensity of the magnetic separator I is 4000 gausses, and the magnetic field intensity of the magnetic separator II is 2000 gausses; the combined regulator in the step (7) is formed by combining sodium sulfide, sodium bicarbonate and water glass according to the mass ratio of 1:3: 5. The mass content of Fe in the obtained iron ore concentrate is 62.1 percent, and the recovery rate of Fe is 71.6 percent; the mass content of Cu in the copper concentrate is 29.6%, and the recovery rate of Cu is 93.9%.
Example III,
Comprises the components of Cu 6.2 percent, Fe 50.9 percent and SiO2 19.6％、Al2O3Operating the copper converter slag with the copper converter slag content of 0.69%, CaO 0.14%, MgO 0.1-0.25%, Zn 3.4% and S0.36%, according to the steps, wherein the magnetic field intensity of the magnetic separator I is 4000 gausses, and the magnetic field intensity of the magnetic separator II is 2000 gausses; the combined regulator in the step (7) is formed by combining sodium sulfide, sodium bicarbonate and water glass according to the mass ratio of 1:3: 5. After analysis: the mass content of Fe in the obtained iron ore concentrate is 61.3 percent,the recovery rate of Fe is 70.5%; the mass content of Cu in the copper concentrate is 31.9%, and the recovery rate of Cu is 94.7%.
By adopting the process, according to the difference of magnetism and embedded granularity of the copper minerals and the iron minerals, the copper minerals and the iron minerals are separated by adopting a magnetic separation process, and then the copper minerals and the iron minerals are obtained by respectively regrinding and recleaning; the magnetic concentration tailings contain part of micro-fine particle copper minerals, and the magnetic concentration tailings are merged into two-stage flotation operation to recover the copper minerals, so that the recovery rate of the copper minerals is improved; the rough concentration I concentrate has relatively coarse granularity and better floatability, the rough concentration I concentrate is merged into one fine concentration operation, and the copper minerals easy to float in the rough concentration I concentrate have a bearing effect on the micro-fine copper minerals, so that the recovery rate of the copper minerals is improved; and the fine I tailings and the middling 1 contain part of coarse-grained copper minerals, and the fine I tailings and the middling 1 are fed into grading regrinding operation to regrind part of the coarse-grained copper minerals, so that the improvement of the grade and the recovery rate of the copper concentrate is facilitated. The technical scheme of the invention has the advantages of simple process flow, convenient operation and high copper recovery rate and iron recovery rate.
Claims (4)
1. A method for comprehensively recovering copper minerals and iron minerals from copper converter slag is characterized by comprising the following steps:
(1) grade I ore grinding and grading: crushing copper converter slag which comprises 3.1-6.2% of Cu, 42.1-50.9% of Fe, 218.5-22.5% of SiOx, 0.60-0.72% of Al2O30, 0.08-0.18% of CaO, 0.1-0.25% of MgO, 2.5-4.18% of Zn and 0.1-0.46% of S to-2 mm by mass percent, and feeding the crushed copper converter slag into an I-grade ore grinding classification system consisting of a ball mill I and a classification I process for grinding, so that the fineness of the copper converter slag is required to be-0.074 mm and accounts for 75%;
(2) magnetic roughing: sending the copper converter slag obtained by the grade I ore grinding classification system in the step (1) into a magnetic separator I for magnetic roughing to obtain magnetic rough concentrate and magnetic tailings, so as to obtain the magnetic rough concentrate and the magnetic rough tailings;
(3) regrinding magnetic rough concentrate: feeding the magnetic rough concentrate obtained in the step (2) into a II-grade ore grinding grading system for grading and regrinding, wherein the product fineness is required to be 85% of-0.037 mm;
(4) magnetic selection: feeding the magnetic rough concentrate reground in the step (3) into a magnetic separator II for magnetic concentration to obtain magnetic concentrate and magnetic concentration tailings, wherein the magnetic concentrate is iron concentrate; feeding the magnetic concentration tailings into a second-stage flotation operation to recover fine-grained copper minerals;
(5) coarse selection I: sending the magnetic roughing tailings obtained in the step (2) to a roughing I procedure, adding 10g/t of butyl xanthate and 10g/t of pine oil respectively, sending the mixture to a flotation machine for flotation, and obtaining roughing I concentrate and roughing I tailings respectively;
(6) and II, grading and regrinding: feeding the rough selection I tailings obtained in the step (5) into a grade II grinding classification system consisting of a ball mill II and a classification II procedure for grinding, so that the fineness requirement of the rough selection I tailings is 85% when the fineness requirement is-0.044 mm;
(7) and (4) rough selection II: sending the graded overflow product obtained in the step (6) into a roughing II process, adding a combined regulator, a combined collecting agent and pine oil, and sending the mixture into a flotation machine for flotation to respectively obtain roughing II concentrate and roughing II tailings;
(8) secondary selection: sending the rough concentration II concentrate into the fine concentration I operation to obtain fine concentration
Concentrate and first tailing of choice, first tailing of choice returns to second section and grades and reground operation; the fine selection I concentrate is sent to the fine selection
Performing operation, wherein the obtained concentration II concentrate is copper concentrate, and the obtained concentration II tailings return to the operation of the concentration I;
(9) secondary scavenging: adding 10g/t of butyl xanthate and 10g/t of pine oil into the rougher II tailings, sending the mixture to a flotation machine for scavenging I operation to obtain middling 1 and scavenging I tailings respectively, and returning the middling 1 to the rougher II; and adding 10g/t of butyl xanthate and 10g/t of pine oil into the scavenged I tailings, sending the mixture into a flotation machine to perform scavenged II operation to respectively obtain middlings 2 and tailings, returning the middlings 2 to the scavenged I operation, and discarding the tailings.
2. The method for comprehensively recovering copper minerals and iron minerals from copper converter slag according to claim 1, characterized in that: and (3) the magnetic field intensity of the magnetic separator I in the step (2) is 4000 gausses.
3. The method for comprehensively recovering copper minerals and iron minerals from copper converter slag according to claim 1, characterized in that: and (4) the magnetic field intensity of the magnetic separator II in the step (4) is 2000 gauss.
4. The method for comprehensively recovering copper minerals and iron minerals from copper converter slag according to claim 1, characterized in that: the combined regulator in the step (7) is formed by combining sodium sulfide, sodium bicarbonate and water glass according to the mass ratio of 1:3: 5.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113814061A (en) * | 2021-08-31 | 2021-12-21 | 黄石市泓义城市矿产资源产业研究院有限公司 | Method for preparing magnetic dense medium from copper smelting tailings |
| CN114602638A (en) * | 2022-02-28 | 2022-06-10 | 中铁建铜冠投资有限公司 | Method for recovering copper minerals from secondary copper-bearing ores in dripping mode step by step |
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| CN114602638B (en) * | 2022-02-28 | 2023-10-24 | 中铁建铜冠投资有限公司 | Method for step-by-step recovery of copper minerals from dripping secondary copper ores |
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