CN110586330A - Flotation process for recovering micro-fine mica from micro-fine iron tailings - Google Patents
Flotation process for recovering micro-fine mica from micro-fine iron tailings Download PDFInfo
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- CN110586330A CN110586330A CN201911027711.7A CN201911027711A CN110586330A CN 110586330 A CN110586330 A CN 110586330A CN 201911027711 A CN201911027711 A CN 201911027711A CN 110586330 A CN110586330 A CN 110586330A
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- 239000010445 mica Substances 0.000 title claims abstract description 65
- 229910052618 mica group Inorganic materials 0.000 title claims abstract description 65
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 238000005188 flotation Methods 0.000 title claims abstract description 29
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000010419 fine particle Substances 0.000 claims abstract description 24
- 239000012141 concentrate Substances 0.000 claims abstract description 21
- 239000003814 drug Substances 0.000 claims abstract description 18
- 230000002000 scavenging effect Effects 0.000 claims abstract description 15
- 239000003112 inhibitor Substances 0.000 claims abstract description 7
- 239000000047 product Substances 0.000 claims description 36
- 239000002245 particle Substances 0.000 claims description 23
- 239000006260 foam Substances 0.000 claims description 17
- 239000002002 slurry Substances 0.000 claims description 15
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- 239000011362 coarse particle Substances 0.000 claims description 11
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 9
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 8
- 239000004576 sand Substances 0.000 claims description 8
- 239000006228 supernatant Substances 0.000 claims description 8
- 235000019353 potassium silicate Nutrition 0.000 claims description 7
- 239000010665 pine oil Substances 0.000 claims description 6
- REYJJPSVUYRZGE-UHFFFAOYSA-N Octadecylamine Chemical compound CCCCCCCCCCCCCCCCCCN REYJJPSVUYRZGE-UHFFFAOYSA-N 0.000 claims description 4
- BCKXLBQYZLBQEK-KVVVOXFISA-M Sodium oleate Chemical compound [Na+].CCCCCCCC\C=C/CCCCCCCC([O-])=O BCKXLBQYZLBQEK-KVVVOXFISA-M 0.000 claims description 4
- JRBPAEWTRLWTQC-UHFFFAOYSA-N dodecylamine Chemical compound CCCCCCCCCCCCN JRBPAEWTRLWTQC-UHFFFAOYSA-N 0.000 claims description 4
- 239000004088 foaming agent Substances 0.000 claims description 4
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 4
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 4
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 4
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 4
- 239000004115 Sodium Silicate Substances 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims description 2
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 2
- 238000005194 fractionation Methods 0.000 claims 1
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 23
- 239000011707 mineral Substances 0.000 abstract description 23
- 238000011084 recovery Methods 0.000 abstract description 19
- 230000018044 dehydration Effects 0.000 abstract description 4
- 238000006297 dehydration reaction Methods 0.000 abstract description 4
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-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
- 239000002253 acid Substances 0.000 description 1
- 229910052656 albite Inorganic materials 0.000 description 1
- WUOACPNHFRMFPN-UHFFFAOYSA-N alpha-terpineol Chemical compound CC1=CCC(C(C)(C)O)CC1 WUOACPNHFRMFPN-UHFFFAOYSA-N 0.000 description 1
- DLHONNLASJQAHX-UHFFFAOYSA-N aluminum;potassium;oxygen(2-);silicon(4+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Si+4].[Si+4].[Si+4].[K+] DLHONNLASJQAHX-UHFFFAOYSA-N 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 229910001919 chlorite Inorganic materials 0.000 description 1
- 229910052619 chlorite group Inorganic materials 0.000 description 1
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 description 1
- SQIFACVGCPWBQZ-UHFFFAOYSA-N delta-terpineol Natural products CC(C)(O)C1CCC(=C)CC1 SQIFACVGCPWBQZ-UHFFFAOYSA-N 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000002516 radical scavenger Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229940116411 terpineol Drugs 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- B03D1/002—Inorganic 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
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/004—Organic compounds
- B03D1/008—Organic compounds containing oxygen
-
- 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
- B03D1/004—Organic compounds
- B03D1/01—Organic compounds containing nitrogen
-
- 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
- B03D2203/04—Non-sulfide ores
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
Abstract
The invention relates to a valuable mineral recovery process of tailings, in particular to a flotation process for recovering micro-fine mica from micro-fine iron tailings. The invention adopts one-step grading operation to remove fine particles, one-step roughing, five-step concentration and one-step scavenging to form a flotation process, middlings are selected and combined to be respectively subjected to dehydration operation concentration and reagent removal treatment, and in the aspect of a medicament system, a combined regulator, a mixed inhibitor and a mixed collector are used for fully regulating the state of ore pulp, so that the floatability granularity lower limit of mica minerals reaches 0.025mm, and high-quality mica concentrate is obtained, wherein the yield of the mica concentrate is more than or equal to 11.86%, the mica content in the mica concentrate is more than or equal to 97.21%, and the mica recovery rate is more than or equal to 48.25%. The mica recovery rate is high, the recovery efficiency of valuable mineral resources is improved, and economic benefits are brought to enterprises.
Description
Technical Field
The invention relates to a valuable mineral recovery process of tailings, in particular to a flotation process for recovering micro-fine mica from micro-fine iron tailings.
Background
China is a country with poor resources on average of people, 80% of mineral resources are associated minerals, tailings of ore dressing often contain part of valuable minerals worth recovering, if the valuable minerals are not recovered, a large amount of valuable minerals are abandoned in waste tailings, resources are wasted, and the environment is polluted. With the continuous new development of mineral separation technology, equipment, process, medicament and the like, the method provides important guarantee for recovering valuable minerals in tailings, and becomes an urgent reality, and valuable mineral recovery is an important aspect of resource comprehensive utilization.
Mica is an important non-metallic resource and is widely used in modern industries. The iron ore tailings are often accompanied by difficultly selected micro-fine particle mica minerals, the mica content can reach 10-30%, and if the mica in the iron ore tailings can be recycled, the utilization value of the tailings is increased. The recovery of fine-grained mica is usually carried out by flotation, which is generally carried out by using a cationic collector in acid ore pulp or using a mixed collector of negative and positive ions in alkaline ore pulp. The reason that the fine-particle mica minerals are difficult to effectively recover is mainly that the selected minerals are seriously argillized (-the content of particles with the particle size of 0.038mm generally reaches more than 35%), the minerals are mutually mixed, the grade of the concentrate is difficult to improve, meanwhile, the specific surface area and the surface energy of the fine particles are increased, the fine particles have stronger medicament adsorption capacity, poor adsorption selectivity, small mass and easy to be mechanically entrained by coarse particles, and the like. In order to ensure that the flotation is normally carried out, a pre-desliming operation is generally carried out, fine-particle slime is removed, then the flotation is carried out, for example, in a paper published by Weiming (2014) in metal material and metallurgical engineering, "a beneficiation test research on recovering mica from tailings of iron separation" that the lower limit of the desliming particle size is set to be 0.040mm, the mica grade of the mica concentrate obtained by the flotation reaches 96.19%, and the recovery rate of the mica reaches 46.91%. Because the iron dressing tailings are very fine (the proportion of the fraction of 0.075mm is 70-85% in general), the desliming operation is a necessary step of flotation, so that a large amount of micro-fine particle mica is inevitably lost in deslimed fine particle slime, and the recovery rate of the mica is directly reduced, so that the reduction of the lower limit of the particle size of the deslimed mica and the realization of effective flotation of the micro-fine particles are the key points for improving the recovery efficiency of the micro-fine particle mica, and the reasonable design of the flotation process structure is also an important technology for recovering the mica minerals.
Disclosure of Invention
The invention aims to provide a flotation process for recovering micro-fine mica from micro-fine iron tailings, which has the advantages of advanced process, good separation index, stable operation, and capability of effectively recovering the micro-fine mica in the micro-fine iron tailings, wherein the lower limit of the granularity of the floatable micro-fine mica reaches 0.025 mm.
The invention grades the iron ore dressing tailings, reduces the lower limit of the granularity of the grading operation to 0.025mm, removes the fine particles which are difficult to be sorted and are-0.025 mm, uses the combined regulator, the mixed inhibitor and the mixed collector in the rough sorting operation, eliminates the influence of the inevitable ions in the ore pulp on the mica flotation, fully disperses the ore pulp particles, and strengthens the collection of the mica minerals and the inhibition of the gangue minerals; in the second selection operation, the water glass with the functions of dispersion and inhibition is used for fully dispersing ore pulp particles and inhibiting silicate gangue minerals; selecting proper middlings, dewatering, concentrating and removing pesticides, and returning to proper operation sections. Through reasonable design of the process flow, flotation recovery of fine mica with the granularity lower limit of 0.025mm is realized, and finally high-quality mica concentrate is obtained.
The technical scheme of the invention is as follows: a flotation process for recovering micro-fine mica from micro-fine iron tailings comprises the following steps:
step A: grading, wherein the iron ore tailings 1 enter a grading 2 operation to remove the difficultly-selected fine particle products 25 with the particle size of-0.025 mm to obtain coarse particle products 3 with the particle size of +0.025 mm;
and B, step: roughing, namely adding 100-120 g/t of combined regulator sodium hydroxide and 50-80 g/t of sodium carbonate into a coarse particle product 3 in sequence, adjusting the pH value of the ore pulp to 10-11, then adding 1200-1500 g/t of mixed inhibitor sodium silicate and 500-800 g/t of sodium hexametaphosphate in sequence, 150-200 g/t of mixed collector sodium oleate, 100-150 g/t of dodecylamine, 50-60 g/t of octadecylamine and 30-45 g/t of foaming agent pine alcohol oil in sequence, and carrying out flotation roughing 4;
c, step C: carrying out first concentration, namely carrying out first concentration 5 on a foam product mica rough concentrate 20 obtained by rough concentration 4 without adding a medicament;
d, step: second selection, namely adding 450-550 g/t of water glass and 20g/t of pine oil into the foam product obtained in the first selection 5 in sequence, and performing second selection 6;
e, step E: carrying out third concentration, namely carrying out third concentration 7 on the foam product obtained in the second concentration 6 without adding a medicament;
and F, step: carrying out fourth concentration, namely carrying out fourth concentration 8 on the foam product obtained in the third concentration 7 without adding a medicament;
g, step: carrying out fifth concentration 9 on the foam product obtained by the fourth concentration 8 without adding a medicament, wherein the foam product 26 obtained by the fifth concentration 9 is the mica concentrate;
and H, step (2): and (3) scavenging and discharging tailing slurry, wherein the underflow 18 of the roughing 4 is subjected to flotation scavenging 10 without adding a medicament, and the tailing slurry 27 discharged by the scavenging 10 is tailing.
The middlings 13 of the first concentration 5, the middlings 14 of the second concentration 6 and the middlings 19 of the scavenging 10 are combined and enter a first dewatering 11, and the settled sand particles 21 of the first dewatering 11 are returned to the roughing 4; the middlings 15 of the third concentration 7, the middlings 16 of the fourth concentration 8 and the middlings 17 of the fifth concentration 9 are combined and enter the second dewatering 12, and the sand setting particles 23 of the second dewatering 12 are returned to the second concentration 6.
The supernatant 22 of the first dewatering 11 and the supernatant 24 of the second dewatering 12 are combined in a tailing slurry 27, and the fine particle products 25 of the-0.025 mm size fraction removed in the fraction 2 are combined in the tailing slurry 27 or treated separately.
The invention adopts one-step grading operation to remove fine particles, one-step roughing, five-step concentration and one-step scavenging to form a flotation process, middlings are selected and combined to be respectively subjected to dehydration operation concentration and reagent removal treatment, and in the aspect of a medicament system, a combined regulator, a mixed inhibitor and a mixed collector are used for fully regulating the state of ore pulp, so that the floatability granularity lower limit of mica minerals reaches 0.025mm, and high-quality mica concentrate is obtained, wherein the yield of the mica concentrate is more than or equal to 11.86%, the mica content in the mica concentrate is more than or equal to 97.21%, and the mica recovery rate is more than or equal to 48.25%.
The method has the advantages of advanced process, good separation index, stable operation, low lower limit of floatable particle size and high mica recovery rate, realizes the recovery of the micro-fine particle mica in the micro-fine particle iron tailings, improves the recovery efficiency of valuable mineral resources, and brings economic benefits to enterprises.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The main process flow of the invention is as follows: iron dressing tailings 1 → classification 2 → coarse particle product 3, coarse particle product 3 → underflow 18 of roughing 4 → scavenging 10, and tailings slurry 27 is discharged; mica rough concentrate of rough concentration 4 → first concentration 5 → second concentration 6 → third concentration 7 → fourth concentration 8 → fifth concentration 9, to obtain mica concentrate 26; combining the middlings 13, 14 and 19 into a first dewatering device 11, returning sand setting particles 21 of the first dewatering device 11 to roughing 4, combining the middlings 15, 16 and 17 into a second dewatering device 12, and returning sand setting particles 23 of the second dewatering device 12 to second concentration 6; tailing slurry 27 discharged from the scavenging unit 10 is tailing; the supernatant 22 of the first dewatering 11 and the supernatant 24 of the second dewatering 12 are combined into a tailing slurry 27; the fine particle product 25 of the-0.025 mm size fraction removed in fraction 2 can be combined into a tailings slurry 27 or treated separately.
The micro-fine particle iron separation tailings used in the embodiment are tailings obtained after iron separation of a certain iron mine, the related percentages are mass percentages, and the main mineral composition is as follows: 46.45% of quartz, 24.13% of mica, 5.13% of albite, 1.78% of potassium feldspar and 7.05% of chlorite. The size fraction distribution of the iron tailings is shown in the following table:
example 1: the iron ore tailings 1 enter a grading 2 operation, and a fine particle product 25 which is difficult to be sorted and has a particle size of-0.025 mm is removed to obtain a coarse particle product 3 with a particle size of +0.025 mm; adding 100g/t of combined regulator sodium hydroxide and 50g/t of sodium carbonate into the coarse particle product 3 in sequence, and adjusting the pH value of the ore pulp to 10; sequentially adding 1200g/t of mixed inhibitor water glass, 500g/t of sodium hexametaphosphate, 150g/t of mixed collector sodium oleate, 100g/t of dodecylamine, 50g/t of octadecylamine and 30g/t of foaming agent pine oil, and performing flotation roughing 4; the foam product mica rough concentrate 20 obtained by rough concentration 4 is subjected to first fine concentration 5 without adding a medicament; adding 450g/t of water glass and 20g/t of pine oil into the foam product obtained in the first concentration step 5 in sequence, and performing second concentration step 6; the third selection 7, the fourth selection 8 and the fifth selection 9 are carried out without adding medicaments and blank selection is carried out; the underflow 18 of the roughing 4 is subjected to flotation scavenging 10 without adding a medicament; the middlings of the first concentration 5, the second concentration 6 and the scavenging 10 are merged and enter a first dehydration 11, and the sand setting particles 21 of the first dehydration 11 return to the roughing 4; middlings in the third concentration 7, the fourth concentration 8 and the fifth concentration 9 are merged and enter a second dewatering device 12, and settled sand particles 23 in the second dewatering device 12 return to the second concentration 6; the foam product of the fifth concentration 9 is mica concentrate 26; tailing slurry 27 from the scavenging 10 is tailing; the supernatant 22 of the first dewatering 11 and the supernatant 24 of the second dewatering 12 are combined into a tailing slurry 27; the fine particle product 25 of the-0.025 mm size fraction removed in fraction 2 is either combined into a tailings slurry 27 or treated separately.
The process indexes obtained in example 1 are:
mica concentrate: the yield was 11.86%, the mica content was 98.16%, and the mica recovery was 48.25%.
Example 2: the iron ore tailings 1 enter a grading 2 operation, and a fine particle product 25 which is difficult to be sorted and has a particle size of-0.025 mm is removed to obtain a coarse particle product 3 with a particle size of +0.025 mm; adding 120g/t of combined regulator sodium hydroxide, 80g/t of sodium carbonate (regulating the pH value of ore pulp to 11), 1500g/t of mixed inhibitor water glass, 800g/t of sodium hexametaphosphate, 200g/t of mixed collector sodium oleate, 150g/t of dodecylamine, 60g/t of octadecylamine and 45g/t of foaming agent terpineol oil into the coarse particle product 3 in sequence, and performing flotation and roughing 4; the foam product mica rough concentrate 20 obtained by rough concentration 4 is subjected to first fine concentration 5 without adding a medicament; adding 550g/t of water glass and 20g/t of pine oil into the foam product obtained in the first concentration step 5 in sequence, and performing second concentration step 6; the steps of third concentrating 7, fourth concentrating 8, fifth concentrating 9, scavenger 10 and middlings combined dewatering (including first dewatering and second dewatering) treatment to obtain mica concentrate 26 and tailings and fine particle product 25 are identical to those described in example 1.
The process indexes obtained in example 2 are:
mica concentrate: the yield was 12.91%, mica content 97.21%, mica recovery 52.01%.
The implementation conditions of the two embodiments show that the process is advanced, the separation index is good, the operation is stable, the lower limit of the granularity of the floatable fine mica reaches 0.025mm, the recovery rate of the mica is high, the recovery of the fine mica in the fine iron tailings is realized, and the comprehensive utilization efficiency of resources is improved.
Claims (3)
1. A flotation process for recovering micro-fine mica from micro-fine iron tailings is characterized by comprising the following steps:
step A: grading, wherein the iron ore tailings (1) enter a grading (2) operation to remove a difficultly-selected fine particle product (25) with a particle size of-0.025 mm to obtain a coarse particle product (3) with a particle size of +0.025 mm;
and B, step: roughing, namely adding 100-120 g/t of combined regulator sodium hydroxide and 50-80 g/t of sodium carbonate into a coarse particle product (3) in sequence, adjusting the pH value of the ore pulp to 10-11, then adding 1200-1500 g/t of mixed inhibitor sodium silicate, 500-800 g/t of sodium hexametaphosphate, 150-200 g/t of mixed collector sodium oleate, 100-150 g/t of dodecylamine, 50-60 g/t of octadecylamine and 30-45 g/t of foaming agent pine oil in sequence, and carrying out flotation roughing (4);
c, step C: carrying out first concentration (5) on a foam product mica rough concentrate (20) obtained by the first concentration and rough concentration (4) without adding a medicament;
d, step: performing secondary concentration, namely sequentially adding 450-550 g/t of water glass and 20g/t of pine oil into the foam product obtained in the primary concentration (5) to perform secondary concentration (6);
e, step E: carrying out third concentration (7) on the foam product obtained in the second concentration (6) without adding a medicament;
and F, step: fourth concentrating, namely performing fourth concentrating (8) on the foam product obtained in the third concentrating (7) without adding a medicament;
g, step: carrying out fifth concentration (9) on the foam product obtained in the fourth concentration (8) without adding a medicament, wherein the foam product (26) obtained in the fifth concentration (9) is the mica concentrate;
and H, step (2): and (3) scavenging and discharging tailing slurry, wherein the underflow (18) of the roughing (4) is subjected to flotation scavenging (10) without adding a medicament, and the tailing slurry (27) discharged by the scavenging (10) is tailing.
2. The flotation process for recovering micro-fine mica from the micro-fine iron tailings as claimed in claim 1, wherein the flotation process comprises the following steps: the middlings (13) of the first concentration (5), the middlings (14) of the second concentration (6) and the middlings (19) of the scavenging (10) are combined and enter a first dewatering device (11), and sand setting particles (21) of the first dewatering device (11) return to the roughing device (4); and the middlings (15) of the third concentration (7), the middlings (16) of the fourth concentration (8) and the middlings (17) of the fifth concentration (9) are combined and enter a second dewatering device (12), and the settled sand particles (23) of the second dewatering device (12) return to the second concentration (6).
3. The flotation process for recovering micro-fine mica from the micro-fine iron tailings as claimed in claim 2, wherein the flotation process comprises the following steps: the supernatant (22) of the first dewatering (11) and the supernatant (24) of the second dewatering (12) are combined in a tailing slurry (27), and the fine-particle products (25) of-0.025 mm size fraction removed by the fractionation (2) are combined in the tailing slurry (27) or treated separately.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911027711.7A CN110586330A (en) | 2019-10-28 | 2019-10-28 | Flotation process for recovering micro-fine mica from micro-fine iron tailings |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911027711.7A CN110586330A (en) | 2019-10-28 | 2019-10-28 | Flotation process for recovering micro-fine mica from micro-fine iron tailings |
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| CN110586330A true CN110586330A (en) | 2019-12-20 |
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| CN113546748A (en) * | 2021-07-19 | 2021-10-26 | 宁化日昌升新材料有限公司 | Machine-made sand flotation and magnetic separation combined mica removing process |
| CN113546751A (en) * | 2021-07-19 | 2021-10-26 | 宁化日昌升新材料有限公司 | One-stage flotation mica removing process for machine-made sand |
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| CN113546752A (en) * | 2021-07-19 | 2021-10-26 | 宁化日昌升新材料有限公司 | Two-stage floatation mica removing process for machine-made sand |
| CN113877721A (en) * | 2021-07-01 | 2022-01-04 | 中南大学 | Method for deeply removing micro-fine particle black and white mica from granite type metal ore tailings |
| CN114588914A (en) * | 2022-03-21 | 2022-06-07 | 冯垚 | Method for preparing catalyst by using tailings |
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| CN112317124A (en) * | 2020-10-22 | 2021-02-05 | 崇义章源钨业股份有限公司 | Method for recovering copper and mica minerals from tungsten-dressing tailings |
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| CN113546751A (en) * | 2021-07-19 | 2021-10-26 | 宁化日昌升新材料有限公司 | One-stage flotation mica removing process for machine-made sand |
| CN113546749A (en) * | 2021-07-19 | 2021-10-26 | 宁化日昌升新材料有限公司 | Magnetic separation and flotation combined mica removing process for machine-made sand |
| CN113546752A (en) * | 2021-07-19 | 2021-10-26 | 宁化日昌升新材料有限公司 | Two-stage floatation mica removing process for machine-made sand |
| CN114588914A (en) * | 2022-03-21 | 2022-06-07 | 冯垚 | Method for preparing catalyst by using tailings |
| CN116037295A (en) * | 2023-02-14 | 2023-05-02 | 中国电建集团成都勘测设计研究院有限公司 | Method for removing mica in machine-made sand by wet method |
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