CN114939483B - Fine particle hematite dressing method - Google Patents
Fine particle hematite dressing method Download PDFInfo
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- CN114939483B CN114939483B CN202210684544.9A CN202210684544A CN114939483B CN 114939483 B CN114939483 B CN 114939483B CN 202210684544 A CN202210684544 A CN 202210684544A CN 114939483 B CN114939483 B CN 114939483B
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- 229910052595 hematite Inorganic materials 0.000 title claims abstract description 37
- 239000011019 hematite Substances 0.000 title claims abstract description 37
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000010419 fine particle Substances 0.000 title claims abstract description 16
- 238000005188 flotation Methods 0.000 claims abstract description 43
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 38
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims abstract description 20
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims abstract description 20
- 229910052742 iron Inorganic materials 0.000 claims abstract description 19
- 229920002472 Starch Polymers 0.000 claims abstract description 6
- 239000008107 starch Substances 0.000 claims abstract description 6
- 239000002245 particle Substances 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims description 34
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 11
- 239000011707 mineral Substances 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 9
- BCKXLBQYZLBQEK-KVVVOXFISA-M Sodium oleate Chemical compound [Na+].CCCCCCCC\C=C/CCCCCCCC([O-])=O BCKXLBQYZLBQEK-KVVVOXFISA-M 0.000 claims description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical group [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 6
- 239000012190 activator Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 2
- 239000012141 concentrate Substances 0.000 abstract description 6
- 238000011084 recovery Methods 0.000 abstract description 6
- 239000003112 inhibitor Substances 0.000 abstract description 3
- 239000003623 enhancer Substances 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract description 2
- 235000019698 starch Nutrition 0.000 abstract description 2
- 239000008396 flotation agent Substances 0.000 description 4
- 239000011859 microparticle Substances 0.000 description 4
- 238000005054 agglomeration Methods 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 239000010453 quartz Substances 0.000 description 3
- 230000002000 scavenging effect Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003911 water pollution Methods 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
- B03D1/02—Froth-flotation processes
- B03D1/025—Froth-flotation processes adapted for the flotation of fines
-
- 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
- B03D1/00—Flotation
- B03D1/02—Froth-flotation processes
- B03D1/028—Control and monitoring of flotation processes; computer models therefor
-
- 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
- B03D1/08—Subsequent treatment of concentrated product
-
- 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
- B03D3/00—Differential sedimentation
- B03D3/06—Flocculation
-
- 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
- B03D2201/005—Dispersants
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to a method for concentrating micro-fine hematite, which comprises the steps of adding low molecular weight sodium polyacrylate to disperse the agglomerated micro-fine particles, adding a small amount of high molecular weight sodium polyacrylate to selectively flocculate the hematite into large particles, and simultaneously, the sodium polyacrylate can be used as an enhancer of inhibitor starch to facilitate the subsequent flotation. Finally, through a coarse-fine three-sweep reverse flotation process, the high-efficiency separation of the hematite containing the micro-fine particles is realized. Compared with the existing flotation method, the method for concentrating the micro-fine particle hematite recovers the micro-fine particle grade hematite which cannot be recovered by the existing flotation method, improves the recovery rate of the hematite while guaranteeing the concentrate grade, and has important significance for the efficient utilization of micro-fine particle iron ore resources.
Description
Technical Field
The invention relates to the technical field of mineral processing, in particular to a method for concentrating micro-fine hematite.
Background
China is a large country of iron ore resources, the resource reserve reaches 841 hundred million tons, but more than 97% is lean iron ore, and the utilization rate of the iron ore resources in China is only 10% due to low ore grade, complex mineral composition, fine embedding granularity and the like. Therefore, a large amount of iron ores are imported from abroad every year, the external dependence is as high as more than 85%, no speaking right exists in the iron ore market pricing, and the development of the domestic steel industry is severely restricted. Realizes the green and efficient development and utilization of huge lean iron ore resources in China, and has been raised as a national strategy.
Along with the continuous utilization of iron ore resources, the characteristics of 'lean, fine and impurity' of iron ore are more and more prominent, and in order to select iron ore concentrate for industrial application, the ore is required to be ground finely so as to realize the monomer dissociation of useful minerals, and a lot of 'secondary mineral mud' is generated in the process. At present, many mine enterprises need to grind iron ore below 44 mu m, which leads to the appearance of many-20 mu m or even-10 mu m fine-grained ores, and the fine-grained ores consume excessive flotation agents in flotation due to light weight and large specific surface area, are easy to agglomerate out of phase and are entrained into tailings, so that the recovery of the fine-grained ores is difficult to realize by the existing method, and the flotation index is seriously influenced. In order to reduce the influence of the enterprises on flotation indexes, the enterprises directly throw the tailings, so that the resources are seriously wasted.
Disclosure of Invention
Aiming at the problems that the dosage of a flotation reagent is greatly increased, heterogeneous agglomeration is carried out, the micro-fine hematite is easy to be carried into tailings and flotation indexes are affected in reverse flotation, the invention provides a micro-fine hematite beneficiation method, which aims at enabling micro-fine hematite to be in-phase agglomerated through dispersion-flocculation after selective adsorption of an inhibitor, enhancing the hydrophilicity of hematite agglomeration, further reducing the adverse effect of micro-fine hematite on reverse flotation, improving the recovery rate and grade of iron in iron concentrate and having important significance for efficiently recycling micro-fine hematite.
In order to achieve the above purpose, the invention is realized by adopting the following technical scheme:
a method for concentrating micro-fine hematite comprises the following steps:
1) Mixing a mineral sample to be treated containing fine-particle-grade hematite with water, adding the mixture into an XFD type single-tank flotation machine, stirring for 3-5 min, adding a pH regulator into the ore pulp, and stirring for 3-5 min until the pH value is between 11 and 12;
2) Adding 80-100 g/t of low molecular weight sodium polyacrylate into the ore pulp obtained in the step 1) and stirring for 3-5 min, then adding 60-100 g/t of high molecular weight sodium polyacrylate and stirring for 3-5 min, then adding 600-1000 g/t of alpha-starch and stirring for 3-5 min, then adding 400-600 g/t of activator CaCl 2 and stirring for 3-5 min, and finally adding 500-800 g/t of collector sodium oleate and stirring;
3) And (3) carrying out a coarse-fine three-sweep reverse flotation test on the ore pulp obtained in the step (2), wherein the dosage of sodium oleate of the collector in the coarse flotation test is 2-4 times that of the collector in the fine flotation, and no medicament is added in the scavenging process.
In the step 1), the hematite containing fine particle size fraction means that the particle size of the material is milled so that the-0.044 mm content is more than 90% and the-0.020 mm content is more than 30%.
In the step 1), the grade of the total iron of the ore sample to be treated is 40-50%, and the ore sample is natural ore or artificial mixed ore.
In the step 1), the concentration of the ore pulp is 25-35%, the concentration of the ore pulp refers to the mass percentage of solids in the ore pulp, the pH regulator is a sodium hydroxide solution with the concentration of 1-5 wt%, and the stirring speed of a flotation machine is 1800-2000 rpm.
In the step 2), the molecular weight of the low molecular sodium polyacrylate is 1000-5000, the molecular weight of the high molecular sodium polyacrylate is 200-300 ten thousand, the adding sequence is that the low molecular sodium polyacrylate is firstly added, then the high molecular sodium polyacrylate is added, and the stirring speed of a flotation machine is 1800-2000 rpm.
In the step 3), the reverse flotation process adopts a coarse-fine three-sweep open circuit experiment, and can also adopt a coarse-fine three-sweep closed circuit experiment.
Compared with the prior art, the invention has the beneficial effects that:
The micro-fine hematite has light weight and large specific surface area, so that a large amount of flotation agents are consumed in flotation, heterogeneous agglomeration is easy to occur, the micro-fine hematite is entrained into tailings, and flotation indexes are seriously influenced. According to the method provided by the invention, firstly, the low molecular weight sodium polyacrylate is added to play a role in dispersing the agglomerated micro-particles, and then a small amount of high molecular weight sodium polyacrylate is added to selectively flocculate the hematite into large particles, so that the sodium polyacrylate has an inhibition effect on the hematite, and can be used as an enhancer of inhibitor starch, thereby being beneficial to subsequent flotation. Finally, through a coarse-fine three-sweep reverse flotation process, the high-efficiency separation of the hematite containing the micro-fine particles is realized. Compared with the existing flotation method, the method for concentrating the micro-fine particle hematite recovers the micro-fine particle grade hematite which cannot be recovered by the existing flotation method, improves the recovery rate of the hematite while guaranteeing the concentrate grade, and has important significance for the efficient utilization of micro-fine particle iron ore resources. Meanwhile, the problem of consumption of a large amount of flotation agents caused by large specific surface area of the micro-particles is reduced, and water pollution caused by the flotation agents is reduced. In addition, flocculation reduces the cyclic accumulation of micro-particles in the whole flotation system, reduces the system pressure and improves the production efficiency.
Drawings
FIG. 1 is a coarse-fine three-sweep open-circuit flow chart of the present invention;
fig. 2 is a schematic diagram of a coarse-fine three-pass closed circuit of the present invention.
Detailed Description
The following is a further description of embodiments of the invention, taken in conjunction with the accompanying drawings:
The hematite ore containing micro-particles selected in the embodiment of the invention is taken from the Anshan area of Liaoning, the grade of the total iron in the ore is 45% -50%, the gangue mineral is mainly quartz, and the granularity of the ore is 85% -95% of the content of-44 mu m.
Example 1:
As shown in figure 1, the fine-particle-containing hematite selected in the embodiment has a full iron grade 48.50%, gangue minerals mainly comprise quartz, the ore granularity is-44 mu m and the content is 90%, and a coarse-fine three-sweep reverse flotation open-circuit process flow is adopted.
1) 200G of a mineral sample to be treated containing fine-particle grade hematite is mixed with water, the mixture is added into an XFD type single-tank flotation machine with the volume of 500ml, the concentration of ore pulp is regulated to be about 30 percent, the mixture is fully stirred for 3 minutes under the condition that the stirring speed is 1992rpm, a pH regulator is added into the ore pulp, the pH value is 11.5, and the mixture is stirred for 3 minutes.
2) Adding 80g/t of low molecular weight sodium polyacrylate into the ore pulp obtained in the step 1) and stirring for 3min, then adding 60g/t of high molecular weight sodium polyacrylate and stirring for 3min, then adding 650g/t of alpha-starch and stirring for 3min, then adding 550g/t of an activator CaCl 2 and stirring for 3min, finally roughly selecting and adding 500g/t of collector sodium oleate and stirring for 3min, carrying out flotation for 5min, finely selecting and adding 250g/t of collector sodium oleate and stirring for 3min, and carrying out flotation for 4min.
3) And (3) carrying out a coarse-fine three-sweep reverse flotation open circuit test on the ore pulp obtained in the step (2), wherein no medicament is added in the scavenging process.
And finally, the grade of the obtained flotation concentrate is 67.12%, and the recovery rate is 70.56%.
Example 2:
As shown in figure 2, the fine-particle-containing hematite selected in the embodiment has a full iron grade 46.70%, gangue minerals mainly comprise quartz, the granularity of the ore is 92% of-44 mu m, and a rough-fine three-sweep reverse flotation closed process flow is adopted.
1) Mixing 200g of a to-be-treated mineral sample containing fine-particle-grade hematite with water, adding the mixture into an XFD type single-tank flotation machine with the volume of 500ml, adjusting the concentration of ore pulp to about 30%, fully stirring the mixture for 3min under the condition that the stirring rotation speed is 1992rpm, adding a pH regulator into the ore pulp, and stirring the mixture for 3min at the pH value of 11.5;
2) Adding 85g/t of low molecular weight sodium polyacrylate into the ore pulp obtained in the step 1) and stirring for 3min, then adding 70g/t of high molecular weight sodium polyacrylate and stirring for 3min, then adding 650g/t of alpha-starch and stirring for 3min, then adding 550g/t of an activator CaCl 2 and stirring for 3min, finally roughly selecting and adding 500g/t of collector sodium oleate and stirring for 3min, carrying out flotation for 5min, finely selecting and adding 250g/t of collector sodium oleate and stirring for 3min, and carrying out flotation for 4min.
3) And (3) carrying out a rough-fine three-sweep reverse flotation closed-loop test on the ore pulp obtained in the step (2), wherein no medicament is added in the scavenging process. The dosing regime in the closed-loop process is the same as step 2).
And finally, the grade of the obtained flotation concentrate is 66.52%, and the recovery rate is 82.12%.
Claims (4)
1. The fine particle hematite dressing method is characterized by comprising the following steps of:
1) Mixing a to-be-treated mineral sample containing fine-particle-grade hematite with water, adding the mixture into a flotation machine, stirring, adding a pH regulator into ore pulp, and stirring until the pH value is between 11 and 12;
2) Adding 80-100 g/t of low molecular weight sodium polyacrylate into the ore pulp obtained in the step 1) and stirring, then adding 60-100 g/t of high molecular weight sodium polyacrylate and stirring, then adding 600-1000 g/t of alpha-starch and stirring, then adding 400-600 g/t of activator CaCl 2 and stirring, and finally adding 500-800 g/t of collector sodium oleate and stirring;
3) Carrying out a coarse-fine three-sweep reverse flotation test on the ore pulp obtained in the step 2), wherein the dosage of sodium oleate of a collector in the coarse flotation test is 2-4 times that of a collector in the fine flotation;
In the step 1), the concentration of the ore pulp is 25-35%, the concentration of the ore pulp refers to the mass percentage of solids in the ore pulp, the pH regulator is a sodium hydroxide solution with the concentration of 1-5 wt%, and the stirring speed of a flotation machine is 1800-2000 rpm.
2. The method for beneficiation of fine-grained hematite according to claim 1, wherein in the step 1), the fine-grained hematite is obtained by grinding to have a particle size of-0.044 mm content of more than 90% and-0.020 mm content of more than 30%.
3. The method for beneficiation of micro-fine hematite according to claim 1, wherein in the step 1), the grade of the total iron of the ore sample to be treated is 40% -50%.
4. The method for beneficiation of micro-fine hematite according to claim 1, wherein in the step 2), the molecular weight of the low molecular sodium polyacrylate is 1000-5000, the molecular weight of the high molecular sodium polyacrylate is 200-300 ten thousand, and the stirring rotation speed of the flotation machine is 1800-2000 rpm.
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| CN202210684544.9A CN114939483B (en) | 2022-06-17 | 2022-06-17 | Fine particle hematite dressing method |
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| CN202210684544.9A CN114939483B (en) | 2022-06-17 | 2022-06-17 | Fine particle hematite dressing method |
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| CN114939483B true CN114939483B (en) | 2024-06-07 |
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|---|---|---|---|---|
| US6068693A (en) * | 1997-06-16 | 2000-05-30 | Ecc International Inc. | Method for separating mixture of finely divided minerals and product thereof |
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| CN113798065A (en) * | 2021-08-23 | 2021-12-17 | 鞍钢集团矿业有限公司 | Composite inhibitor for reverse flotation of carbonate-containing iron ore and preparation method and application thereof |
-
2022
- 2022-06-17 CN CN202210684544.9A patent/CN114939483B/en active Active
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| US6068693A (en) * | 1997-06-16 | 2000-05-30 | Ecc International Inc. | Method for separating mixture of finely divided minerals and product thereof |
| JP2007029940A (en) * | 2005-07-28 | 2007-02-08 | Hymo Corp | Dehydration method of sludge |
| CN104066686A (en) * | 2012-01-25 | 2014-09-24 | 索特维尔公司 | Method for dispersing and aggregating components of mineral slurries |
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| CN110465404A (en) * | 2018-05-09 | 2019-11-19 | 中国瑞林工程技术有限公司 | The method for handling carbonate containing iron selection tailings |
| CN113798065A (en) * | 2021-08-23 | 2021-12-17 | 鞍钢集团矿业有限公司 | Composite inhibitor for reverse flotation of carbonate-containing iron ore and preparation method and application thereof |
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| Title |
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