CN116832949A - Method for comprehensively recovering petalite based on grading magnetic separation process - Google Patents
Method for comprehensively recovering petalite based on grading magnetic separation process Download PDFInfo
- Publication number
- CN116832949A CN116832949A CN202310984178.3A CN202310984178A CN116832949A CN 116832949 A CN116832949 A CN 116832949A CN 202310984178 A CN202310984178 A CN 202310984178A CN 116832949 A CN116832949 A CN 116832949A
- Authority
- CN
- China
- Prior art keywords
- magnetic
- petalite
- concentrate
- fraction
- fine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- HEHRHMRHPUNLIR-UHFFFAOYSA-N aluminum;hydroxy-[hydroxy(oxo)silyl]oxy-oxosilane;lithium Chemical compound [Li].[Al].O[Si](=O)O[Si](O)=O.O[Si](=O)O[Si](O)=O HEHRHMRHPUNLIR-UHFFFAOYSA-N 0.000 title claims abstract description 63
- 229910052670 petalite Inorganic materials 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 59
- 238000007885 magnetic separation Methods 0.000 title claims abstract description 50
- 239000000126 substance Substances 0.000 claims abstract description 87
- 239000012141 concentrate Substances 0.000 claims abstract description 68
- 238000000926 separation method Methods 0.000 claims abstract description 43
- 238000004062 sedimentation Methods 0.000 claims abstract description 37
- 239000007788 liquid Substances 0.000 claims abstract description 24
- 230000002000 scavenging effect Effects 0.000 claims abstract description 18
- 239000010433 feldspar Substances 0.000 claims abstract description 16
- 238000000227 grinding Methods 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000006148 magnetic separator Substances 0.000 claims description 32
- 229910001220 stainless steel Inorganic materials 0.000 claims description 20
- 239000010935 stainless steel Substances 0.000 claims description 20
- 239000010419 fine particle Substances 0.000 claims description 12
- 239000002002 slurry Substances 0.000 claims description 8
- 239000000919 ceramic Substances 0.000 claims description 6
- 230000005389 magnetism Effects 0.000 claims description 5
- 238000004064 recycling Methods 0.000 claims description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 28
- 239000011707 mineral Substances 0.000 abstract description 28
- 238000011084 recovery Methods 0.000 abstract description 24
- 229910052629 lepidolite Inorganic materials 0.000 abstract description 17
- 238000010494 dissociation reaction Methods 0.000 abstract description 5
- 230000005593 dissociations Effects 0.000 abstract description 5
- 238000005352 clarification Methods 0.000 abstract description 4
- 230000005415 magnetization Effects 0.000 abstract description 4
- 239000002245 particle Substances 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 37
- 235000013339 cereals Nutrition 0.000 description 10
- 229910052744 lithium Inorganic materials 0.000 description 9
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 5
- 238000011031 large-scale manufacturing process Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 4
- 239000003814 drug Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000010438 granite Substances 0.000 description 3
- 239000000696 magnetic material Substances 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 229910018068 Li 2 O Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 239000011362 coarse particle Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000010445 mica Substances 0.000 description 2
- 229910052618 mica group Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- QSNQXZYQEIKDPU-UHFFFAOYSA-N [Li].[Fe] Chemical compound [Li].[Fe] QSNQXZYQEIKDPU-UHFFFAOYSA-N 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 229910052626 biotite Inorganic materials 0.000 description 1
- 229910052792 caesium Inorganic materials 0.000 description 1
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 235000011868 grain product Nutrition 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 description 1
- 229910052808 lithium carbonate Inorganic materials 0.000 description 1
- 229910001760 lithium mineral Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- RHDUVDHGVHBHCL-UHFFFAOYSA-N niobium tantalum Chemical compound [Nb].[Ta] RHDUVDHGVHBHCL-UHFFFAOYSA-N 0.000 description 1
- 238000011027 product recovery Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 229910052701 rubidium Inorganic materials 0.000 description 1
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical compound [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 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
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a method for comprehensively recovering petalite based on a grading magnetic separation process, which belongs to the technical field of comprehensive mineral separation and recovery of lepidolite, and comprises the following steps: crushing and grinding, strong magnetic rough concentration, hydraulic classification, coarse-grain strong magnetic scavenging, mixed-concentration strong magnetic concentration, mixed-concentration strong magnetic scavenging, fine-grain strong magnetic rough concentration and solid-liquid separation; according to the invention, a reasonable mineral separation process flow is selected aiming at differences of physical and chemical properties such as mineral composition, element content, density, dissociation degree, specific magnetization rate, particle size structure, sedimentation velocity and the like of the petalite and associated minerals, four products of high-quality feldspar concentrate, high-quality petalite concentrate, medium-quality feldspar concentrate and medium-quality petalite concentrate are separated, the comprehensive recovery rate of valuable minerals can reach hundred percent, the tail water obtained by solid-liquid separation can be recycled after clarification, the double zero emission of the tailings and the tail water is realized, and a scientific technical basis is provided for improving the mineral separation recovery index of the petalite.
Description
Technical Field
The invention relates to the technical field of comprehensive mineral separation and recovery of lepidolite, in particular to a method for comprehensively recovering the lepidolite based on a grading magnetic separation process.
Background
Lepidolite is the most common lithium mineral, belongs to one of mica minerals, is generally produced in granite peganite, and is often accompanied by minerals such as tantalum-niobium ore, biotite, cassiterite, feldspar, quartz and the like. The iron-containing lepidolite is called petalite, has weak magnetism, and is often a fine scale aggregate. Lepidolite is one of the main materials for extracting lithium metal or lithium carbonate, often containing rubidium and cesium, and is also an important material for extracting these rare metals. Lepidolite is used as a raw material of lithium chemical products and is widely applied to the fields of lithium batteries, metallurgy, glass, ceramics, medicine, chemical industry, military industry and the like; with the rapid development of green and environment-friendly new energy, the demand for lithium battery raw materials is greatly increased.
At present, domestic lepidolite processing enterprises mainly adopt a desliming-floatation process for mineral separation; along with the development of strong magnetic separation process equipment and technology, part of lepidolite processing enterprises also begin to adopt a vertical-ring high-gradient magnetic separator to separate lepidolite; also part of lepidolite processing enterprises adopt a superconducting magnetic separator to recycle fine-particle lepidolite in fine mud; the mineral separation process can be used for separating qualified industrial products.
According to research, when a desliming-floatation process is adopted, before the lepidolite is collected by using fatty acid, fine mud affecting floatation indexes needs to be removed by using a hydrocyclone, but part of fine flake lepidolite is simultaneously lost in overflowed fine mud, so that the recovery rate of lepidolite is reduced; when the vertical-ring high-gradient magnetic separator is adopted, although the environmental protection problem of medicament pollution does not exist, the lepidolite in the fine particle grade in the fine flake form can not be effectively recovered; meanwhile, when the superconducting magnetic separator is adopted, although good mineral separation indexes can be obtained for the lithium fine mud, large-scale production is difficult to realize.
Aiming at the technical problems of high production cost, low beneficiation yield, high environmental protection pressure and small treatment capacity of the existing beneficiation process, the method for comprehensively recovering valuable minerals in hundred percent, improving beneficiation recovery indexes, improving the quality of recovered products, realizing double zero discharge of tailings and tail water and being suitable for large-scale production and application is designed to be a problem to be solved by the lepidolite processing enterprises in the present stage.
Disclosure of Invention
For the problems existing in the prior art, the method for comprehensively recovering the petalite based on the classifying magnetic separation process provided by the invention selects reasonable combined mineral separation process flows of crushing and grinding, strong magnetic roughing, hydraulic classification, coarse-grain strong magnetic scavenging, mixed-concentrate strong magnetic scavenging, fine-grain strong magnetic roughing, fine-grain strong magnetic scavenging, solid-liquid separation and the like, and sorts out four products of high-quality feldspar concentrate, high-quality petalite concentrate, medium-quality petalite concentrate and medium-quality petalite concentrate, wherein the comprehensive recovery rate of valuable minerals can reach hundred percent, the tail water obtained by solid-liquid separation can be recycled after clarification, the double zero emission of tailings and tail water is realized, scientific technical basis is provided for improving mineral separation recovery indexes and improving the quality of byproduct petalite concentrate, and the method is suitable for large-scale production and application.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the invention provides a method for comprehensively recovering petalite based on a grading magnetic separation process, which comprises the following steps:
s1: crushing and grinding: crushing and grinding raw ore to obtain qualified granularity product; the crushing and grinding operation can lead the petalite and gangue minerals in the raw ore to achieve monomer dissociation, thereby being beneficial to improving the mineral sorting index;
s2: strong magnetic roughing: performing magnetic separation operation under the first magnetic field intensity after the qualified granularity product is pulped to obtain a first magnetic substance and a first non-magnetic substance; the first magnetic substance is the coarse ore concentrate of the petalite with good monomer dissociation degree, and can give consideration to the mineral separation indexes such as the quality and the recovery rate of the product;
s3: hydraulic classification: carrying out hydraulic classification operation on the first non-magnetic substance to obtain a fine-fraction product and a coarse-fraction product; the first non-magnetic substance can be separated into two products with different granularity by hydraulic classification operation, so that the subsequent magnetic separation is facilitated;
s4: strong magnetic scavenging of coarse grains: carrying out magnetic separation operation on the coarse fraction product under the second magnetic field intensity to obtain a second magnetic substance and a second non-magnetic substance; the second non-magnetic substance is discharged into a coarse fraction tailing sedimentation tank; coarse grain strong magnetic scavenging can select the petalite contained in the coarse grain product as far as possible, reduce the content of lithium metal in the second non-magnetic substance and improve the recovery rate of the product to the greatest extent; the second non-magnetic substance is the high-quality feldspar concentrate;
s5: mixing and strong magnetic selection: combining the first magnetic substance and the second magnetic substance into mixed concentrate, and carrying out magnetic separation operation on the mixed concentrate under the third magnetic field intensity to obtain a third magnetic substance and a third non-magnetic substance; the third magnetic substance is discharged into a coarse-fraction concentrate sedimentation tank; the third magnetic substance is the high-quality petalite concentrate, so that the added value of the product is improved;
s6: mixing and strong magnetic scavenging: carrying out magnetic separation operation on the third nonmagnetic substance under the fourth magnetic field intensity to obtain a fourth magnetic substance and a fourth nonmagnetic substance; the fourth magnetic substance is discharged into the coarse-fraction concentrate sedimentation tank; the fourth magnetic substance is high-quality petalite concentrate selected from the third non-magnetic substance, so that the recovery rate and the production benefit of the product are improved; the fourth non-magnetic substance is mixed into the coarse-fraction product, and S4 is carried out, so that the recovery rate of coarse-fraction petalite can be further improved;
s7: coarse separation of fine particles by strong magnetism: carrying out magnetic separation operation on the fine fraction product under a fifth magnetic field strength to obtain a fifth magnetic substance and a fifth non-magnetic substance; the fifth non-magnetic substance is discharged into a fine-fraction tailing sedimentation tank; the fifth magnetic substance is fine particle grade petalite, so that the recovery rate of fine particle products can be effectively improved; the fifth non-magnetic substance is the medium-quality feldspar concentrate;
s8: fine grain strong magnetic selection: performing magnetic separation operation on the fifth magnetic substance under a sixth magnetic field strength to obtain a sixth magnetic substance and a sixth non-magnetic substance; the sixth magnetic substance is discharged into a fine-fraction concentrate sedimentation tank, and the sixth magnetic substance is the intermediate-quality petalite concentrate, so that the added value of the product is improved; the sixth non-magnetic substance is mixed into the fine-fraction product, and S7 is carried out, so that the recovery rate of the fine-fraction petalite can be further improved;
s9: solid-liquid separation: and respectively carrying out solid-liquid separation operation on products in the coarse fraction tailing sedimentation tank, the coarse fraction concentrate sedimentation tank, the fine fraction tailing sedimentation tank and the fine fraction concentrate sedimentation tank, and clarifying separated tail water for recycling.
As a preferred embodiment, in step S1, the raw ore is crushed by a jaw crusher and/or a cone crusher, and then ground by a ball mill.
In step S2, the first magnetic field strength is set to 1.4-1.6 tesla, and the magnetic separation operation is performed by using a vertical-ring high-gradient magnetic separator, and the medium is a high-permeability stainless steel rod.
As a preferable technical solution, in step S3, the first nonmagnetic substance performs a classification operation using a hydrocyclone; the overflow granularity of the hydrocyclone is set to 300-500 meshes; preferably, the overflow particle size is set to 400 mesh, i.e., the fine fraction product obtained is-400 mesh and the coarse fraction product is +400 mesh.
In step S4, the second magnetic field strength is set to 1.6-1.8 tesla, and the magnetic separation operation is performed by using a vertical-ring high-gradient magnetic separator, and the medium is a high-permeability stainless steel rod.
In a preferred embodiment, in step S5, the third magnetic field strength is set to 1.4-1.6 tesla, and the magnetic separation operation is performed by using a vertical-ring high-gradient magnetic separator, and the medium is a high-permeability stainless steel plate mesh.
In a preferred technical scheme, in step S6, the fourth magnetic field strength is set to be 1.6-1.8 tesla, a vertical-ring high-gradient magnetic separator is used for carrying out magnetic separation operation, and the medium is a high-permeability stainless steel plate net.
In a preferred embodiment, in step S7, the fifth magnetic field strength is set to 1.6-1.8 tesla, and the magnetic separation operation is performed by using an electromagnetic slurry high gradient magnetic separator, and the medium is a high magnetic conductive stainless steel plate mesh.
As a preferable technical solution, in step S8, the sixth magnetic field strength is set to 1.4-1.6 tesla, and the magnetic separation operation is performed by using an electromagnetic slurry high gradient magnetic separator, and the medium is set to be a high magnetic conductive stainless steel plate net.
As a preferable technical scheme, in step S9, the product in the coarse-grain tailings sedimentation tank is subjected to solid-liquid separation operation by using a plate-and-frame filter press, so as to obtain high-quality feldspar concentrate; the product in the coarse-grain concentrate sedimentation tank is subjected to solid-liquid separation operation by using a plate-and-frame filter press, so that high-quality petalite concentrate is obtained; the products in the fine-fraction tailing sedimentation tank are subjected to solid-liquid separation operation by using a ceramic filter, so that medium-quality feldspar concentrate is obtained; and carrying out solid-liquid separation operation on the products in the fine-fraction concentrate sedimentation tank by using a disc filter to obtain the intermediate-quality petalite concentrate.
The beneficial effects of the invention are as follows:
1. the invention selects reasonable crushing ore grinding, strong magnetic roughing, hydraulic classification, coarse grain strong magnetic scavenging, mixed concentrate strong magnetic concentration, mixed concentrate strong magnetic scavenging, fine grain strong magnetic roughing, fine grain strong magnetic concentration, solid-liquid separation and other combined ore dressing process flows, and sorts out four products of high-quality feldspar ore concentrate, high-quality petalite ore concentrate, medium-quality feldspar ore concentrate and medium-quality petalite ore concentrate, the comprehensive recovery rate of valuable minerals can reach hundred percent, the tail water after solid-liquid separation can be recycled after clarification, the double zero emission of the tail water and the tail water is realized, scientific technical basis is provided for improving ore dressing recovery indexes of petalite and improving the quality of byproduct feldspar ore concentrate, and the method is suitable for large-scale production and application.
2. Aiming at the differences of physical and chemical properties such as mineral composition, element content, density, dissociation degree, specific magnetization rate, particle size structure, sedimentation velocity and the like of the petalite and associated minerals, the invention divides the dissociated petalite after grinding into two particle sizes of coarse particles and fine particles, uses proper magnetic field intensity, adopts equipment combinations such as a vertical-ring high-gradient magnetic separator, a hydrocyclone, an electromagnetic slurry high-gradient magnetic separator and the like, selects proper high-permeability stainless steel bars, high-permeability stainless steel plate meshes, combinations and other mediums, and effectively carries out grading strong magnetic separation on the coarse particle size and the fine particle size petalite respectively, thereby greatly improving ore dressing indexes such as concentrate grade, product recovery rate and the like; compared with the conventional process, the recovery rate can be improved by 5-10%.
3. The coarse-fine grain grading magnetic separation process can separate high-quality and qualified industrial products such as petalite concentrate, feldspar and the like from granite peganite; when the granite peganite contains valuable minerals such as tantalite, columbite and cassiterite and the like and achieves the industrial grade and mineral separation value, the method of the invention can reasonably increase the technological processes such as heavy separation, magnetic separation and the like according to the differences of physical and chemical properties such as density, specific magnetization and the like of the minerals so as to achieve the purpose of comprehensive mineral separation and recovery, and is suitable for large-scale production and application.
Drawings
FIG. 1 is a process flow diagram of one embodiment of a method for comprehensively recovering petalite based on a staged magnetic separation process of the present invention.
Detailed Description
The present invention is further described below with reference to the accompanying drawings for the convenience of understanding by those skilled in the art.
The prior technology of desliming-floatation is adopted in a certain petalite ore dressing plant in Hunan, the loss rate of lithium in fine mud removed before floatation is about 15%, and the total recovery rate of ore dressing is about 75%; a large amount of fine mud tailings have the problems of resource waste, occupation of land, environmental pollution, storage capacity hazard and the like; meanwhile, the desliming-floatation process also has the problems of high medicament cost, high environmental protection pressure and the like. The technology of the iron lithium mica concentrating mill is improved in large scale, the original desliming-floatation process is improved into a magnetic separation process, the specific process flow is that a vertical ring high gradient magnetic separator is adopted for one-coarse and two-scavenging, and the combined coarse concentrate is subjected to one-fine and one-scavenging, and the magnetic separation process effectively solves the problems of environmental protection, tailing storage capacity and the likeThe production throughput is improved at the same time, but the total recovery rate of ore dressing is about 76-78%, the total recovery rate of ore dressing is limited in improvement, and part of fine flake and fine flake petalite still in tailings is difficult to recover; the specific ore dressing conditions are as follows: when Li in raw ore 2 When the grade of O is 0.52 percent, li in tailings 2 O content is 0.18%, and the tailing granularity screening result shows that Li in +200 mesh coarse fraction 2 O content is 0.07%, li in fraction of-200+400 mesh 2 The content of O is 0.10%, which shows that the vertical-ring high-gradient magnetic separator has higher ore dressing recovery effect on coarse-size-fraction and medium-size-fraction petalite; the yield of the fraction of the fine particles of 400 meshes is 28-30%, li 2 The content of O is 0.24%, wherein Li in-600 mesh fine fraction 2 The O content is up to 0.36%, which indicates that the vertical-ring high-gradient magnetic separator cannot effectively recover fine flake and fine flake petalite; thereby causing a loss of lithium metal.
Researches show that the fine flake and fine flake petalite in the fine particles can obtain better ore dressing recovery effect by adopting a superconducting magnetic separator, but the superconducting magnetic separator has the defects of large equipment investment, low treatment capacity, large operation difficulty and difficulty in actual mass production; test comparison shows that when Li in-400 mesh fine mud removed by a flotation process 2 When the content of O is 0.29%, adopting a superconducting magnetic separator to roughen Li in tailings of one-time strong magnetism 2 The content of O is 0.07%, and Li in tailings obtained by primary strong magnetic roughing by adopting an electromagnetic slurry high-gradient magnetic separator 2 The content of O is 0.09%, which shows that the electromagnetic slurry high-gradient magnetic separator has good ore dressing effect on fine-flake petalite, and is generally applied to the impurity removal and purification of-325 mesh fine-particle-grade kaolin, and has the advantages of mature technology, large processing capacity, high production efficiency, excellent separation index, wide application range and the like.
Referring to fig. 1 and table 1, an embodiment of a method for comprehensively recovering petalite based on a classification magnetic separation process provided by the invention is adopted in the petalite concentrating plant, and comprises the following steps:
s1: crushing and grinding: crushing raw ore to-15 mm through a jaw crusher and a cone crusher, and then entering a wet ball mill and a spiral grading closed circuit grinding operation to obtain qualified granularity products with the fineness of-200 meshes and 60 percent of grinding fineness;
s2: strong magnetic roughing: preparing qualified granularity products into ore pulp with concentration of 30%, feeding the ore pulp into a vertical-ring high-gradient magnetic separator to perform strong magnetic roughing operation under the first magnetic field intensity of 1.4-1.6 Tesla, a high-permeability stainless steel rod with a medium of phi 2mm and a pulse of 14-16Hz, and pre-selecting coarse, medium and fine sheet-shaped petalite with good monomer dissociation degree (namely, the coarse, medium and fine sheet-shaped petalite is a first magnetic substance), wherein Li of the first magnetic substance is as follows 2 The grade of O is 1.40-1.50%; the rest is a first non-magnetic substance;
s3: hydraulic classification: the first non-magnetic substance enters a hydrocyclone to carry out hydraulic classification operation to obtain a fine fraction product of-400 meshes and a coarse fraction product of +400 meshes;
s4: strong magnetic scavenging of coarse grains: preparing coarse-grain-grade product into ore pulp with concentration of 25%, feeding the ore pulp into a vertical-ring high-gradient magnetic separator to perform coarse-grain strong magnetic scavenging under the second magnetic field strength of 1.6-1.8 Tesla, a high-permeability stainless steel rod with a medium of phi 2mm and pulse of 10-12Hz, and magnetically separating out the petalite (namely second magnetic substance) with slightly lower specific magnetization rate by increasing the magnetic field strength and reducing the pulse, wherein Li of the second magnetic substance is as follows 2 The grade of O is 1.20-1.30%; the rest is a second non-magnetic material, li of the second non-magnetic material 2 The O content is 0.06-0.08%, and the second non-magnetic substance is discharged into a coarse fraction tailing sedimentation tank;
s5: mixing and strong magnetic selection: combining the first magnetic substance and the second magnetic substance to obtain a mixed concentrate, wherein Li of the mixed concentrate 2 The grade of O is 1.35-1.45%, the mixed concentrate enters a vertical-ring high-gradient magnetic separator to be mixed, concentrated, strongly magnetic and carefully selected under the third magnetic field intensity of 1.4-1.6 Tesla, the medium is a high-permeability stainless steel plate net, the pulsation is 24-26Hz, and Li is magnetically separated 2 The high-quality petalite concentrate with the O grade of 1.90-2.0 percent (namely third magnetic substance) and the rest of third non-magnetic substance; the third magnetic substance is discharged into a coarse-fraction concentrate sedimentation tank;
s6: mixing and strong magnetic scavenging: the third non-magnetic material enters a vertical ring high gradient magnetic separator to be processed under the fourth magnetic field intensityMixing fine strong magnetic scavenging operation, wherein the fourth magnetic field strength is 1.6-1.8 tesla, the medium is a high magnetic conductive stainless steel plate net, and the pulsation is 28-30Hz; scavenging Li 2 The high-quality petalite concentrate with the O grade of 1.70-1.80 percent (namely, a fourth magnetic substance) is discharged into a coarse-fraction concentrate sedimentation tank; the remainder being Li 2 The intermediate ore with O grade of 0.30-0.40% (namely fourth non-magnetic substance) can be mixed into coarse-grain product, and S4 coarse-grain strong magnetic scavenging step can be performed to further recover Li 2 O；
S7: coarse separation of fine particles by strong magnetism: preparing fine-particle-grade products into ore pulp with concentration of 20%, feeding the ore pulp into an electromagnetic pulp high-gradient magnetic separator to perform fine-particle strong magnetic roughing operation under the fifth magnetic field intensity of 1.6-1.8 Tesla, and obtaining Li by using a narrow-spacing, multi-layer and high-permeability stainless steel plate net as a medium 2 Coarse petalite concentrate (namely fifth magnetic substance) with the grade of O of 1.20-1.30%, and the rest is Li 2 The non-magnetic substance with the O content of 0.08-0.10 percent (namely, a fifth non-magnetic substance) is discharged into a fine-fraction tailing sedimentation tank;
s8: fine grain strong magnetic selection: the fifth magnetic substance enters an electromagnetic slurry high-gradient magnetic separator to carry out fine grain strong magnetic concentration operation under the sixth magnetic field intensity, the sixth magnetic field intensity is 1.4 to 1.6 tesla, the medium is a wide-interval, multi-layer and combined high-permeability stainless steel plate net, and Li is obtained 2 The fine flake-shaped petalite concentrate with the O grade of 1.60-1.70 percent (namely, a sixth magnetic substance) is discharged into a fine-fraction concentrate sedimentation tank; the remainder being Li 2 The middlings with O content of 0.20-0.30% (namely sixth non-magnetic substance) can be mixed into fine fraction product, and S7 fine strong magnetic rough concentration step can be performed to further recover Li 2 O；
S9: solid-liquid separation: the non-magnetic matters in the coarse-grain tailing sedimentation tank are subjected to solid-liquid separation operation by using a plate-and-frame filter press, so that Fe can be obtained 2 O 3 High-quality feldspar concentrate for high-quality ceramics with the content of 0.09 percent and the whiteness of 65.28 percent; non-magnetic matters in the fine-fraction tailing sedimentation tank are subjected to solid-liquid separation operation by using a ceramic filter, so that Fe can be obtained 2 O 3 Middle-quality feldspar concentrate for fine-fraction ceramics with the content of 0.21% and the whiteness of 50.32%; the magnetic substances in the coarse-grain concentrate sedimentation tank are subjected to solid-liquid separation operation by using a plate-and-frame filter press, and Li can be obtained 2 Coarse flaky high-quality petalite concentrate with O grade of 1.90-2.0%; the magnetic substances in the fine-fraction concentrate sedimentation tank are subjected to solid-liquid separation operation by using a disc filter, and Li can be obtained 2 Fine flake-shaped medium-quality petalite concentrate with O grade of 1.60-1.70%; the comprehensive mineral separation recovery rate reaches 87-89%.
TABLE 1 mineral separation index for comprehensively recovering petalite based on fractional magnetic separation process
It should be noted that, the beneficiation process in this embodiment adopts a green and environment-friendly strong magnetic physical beneficiation process, and the tail water produced by the solid-liquid separation operation of all the products can be returned to each operation procedure for recycling after clarification.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The method for comprehensively recovering the petalite based on the grading magnetic separation process is characterized by comprising the following steps of:
s1: crushing and grinding: crushing and grinding raw ore to obtain qualified granularity product;
s2: strong magnetic roughing: performing magnetic separation operation under the first magnetic field intensity after the qualified granularity product is pulped to obtain a first magnetic substance and a first non-magnetic substance;
s3: hydraulic classification: carrying out hydraulic classification operation on the first non-magnetic substance to obtain a fine-fraction product and a coarse-fraction product;
s4: strong magnetic scavenging of coarse grains: carrying out magnetic separation operation on the coarse fraction product under the second magnetic field intensity to obtain a second magnetic substance and a second non-magnetic substance; the second non-magnetic substance is discharged into a coarse fraction tailing sedimentation tank;
s5: mixing and strong magnetic selection: combining the first magnetic substance and the second magnetic substance into mixed concentrate, and carrying out magnetic separation operation on the mixed concentrate under the third magnetic field intensity to obtain a third magnetic substance and a third non-magnetic substance; the third magnetic substance is discharged into a coarse-fraction concentrate sedimentation tank;
s6: mixing and strong magnetic scavenging: carrying out magnetic separation operation on the third nonmagnetic substance under the fourth magnetic field intensity to obtain a fourth magnetic substance and a fourth nonmagnetic substance; the fourth magnetic substance is discharged into the coarse-fraction concentrate sedimentation tank; the fourth non-magnetic substance is mixed into the coarse fraction product, and S4 is carried out;
s7: coarse separation of fine particles by strong magnetism: carrying out magnetic separation operation on the fine fraction product under a fifth magnetic field strength to obtain a fifth magnetic substance and a fifth non-magnetic substance; the fifth non-magnetic substance is discharged into a fine-fraction tailing sedimentation tank;
s8: fine grain strong magnetic selection: performing magnetic separation operation on the fifth magnetic substance under a sixth magnetic field strength to obtain a sixth magnetic substance and a sixth non-magnetic substance; the sixth magnetic substance is discharged into a fine-fraction concentrate sedimentation tank; the sixth non-magnetic substance is mixed into the fine fraction product, and S7 is performed;
s9: solid-liquid separation: and respectively carrying out solid-liquid separation operation on products in the coarse fraction tailing sedimentation tank, the coarse fraction concentrate sedimentation tank, the fine fraction tailing sedimentation tank and the fine fraction concentrate sedimentation tank, and clarifying separated tail water for recycling.
2. The method for comprehensively recovering petalite based on the classified magnetic separation process according to claim 1, wherein in the step S1, the raw ore is crushed using a jaw crusher and/or a cone crusher and then ground using a ball mill.
3. The method for comprehensively recovering petalite based on the grading magnetic separation process according to claim 1, wherein in the step S2, the first magnetic field strength is set to be 1.4-1.6 tesla, a vertical-ring high-gradient magnetic separator is used for carrying out magnetic separation operation, and a medium is set to be a high-permeability stainless steel rod.
4. The method for comprehensively recovering petalite based on the classifying magnetic separation process according to claim 1, wherein in the step S3, the first non-magnetic substance is classified by using a hydrocyclone; the overflow granularity of the hydrocyclone is set to 300-500 meshes.
5. The method for comprehensively recovering petalite based on the grading magnetic separation process according to claim 1, wherein in the step S4, the second magnetic field strength is set to be 1.6-1.8 tesla, a vertical-ring high-gradient magnetic separator is used for carrying out magnetic separation operation, and a medium is set to be a high-permeability stainless steel rod.
6. The method for comprehensively recovering petalite based on the classified magnetic separation process according to claim 1, wherein in the step S5, the third magnetic field strength is set to be 1.4-1.6 tesla, a vertical-ring high-gradient magnetic separator is used for carrying out magnetic separation operation, and a medium is set to be a high-permeability stainless steel plate net.
7. The method for comprehensively recovering petalite based on the classified magnetic separation process according to claim 1, wherein in the step S6, the fourth magnetic field strength is set to be 1.6-1.8 tesla, a vertical-ring high-gradient magnetic separator is used for carrying out magnetic separation operation, and a medium is set to be a high-permeability stainless steel plate net.
8. The method for comprehensively recovering petalite based on the classified magnetic separation process according to claim 1, wherein in the step S7, the fifth magnetic field strength is set to be 1.6-1.8 tesla, the magnetic separation operation is performed by using an electromagnetic slurry high-gradient magnetic separator, and the medium is set to be a high-permeability stainless steel plate net.
9. The method for comprehensively recovering petalite based on the classified magnetic separation process according to claim 1, wherein in the step S8, the sixth magnetic field strength is set to be 1.4-1.6 tesla, the magnetic separation operation is performed by using an electromagnetic slurry high-gradient magnetic separator, and the medium is set to be a high-permeability stainless steel plate net.
10. The method for comprehensively recovering petalite based on the classifying magnetic separation process according to claim 1, wherein in the step S9, the product in the coarse-fraction tailing sedimentation tank is subjected to solid-liquid separation operation by using a plate-and-frame filter press to obtain high-quality feldspar concentrate; the product in the coarse-grain concentrate sedimentation tank is subjected to solid-liquid separation operation by using a plate-and-frame filter press, so that high-quality petalite concentrate is obtained; the products in the fine-fraction tailing sedimentation tank are subjected to solid-liquid separation operation by using a ceramic filter, so that medium-quality feldspar concentrate is obtained; and carrying out solid-liquid separation operation on the products in the fine-fraction concentrate sedimentation tank by using a disc filter to obtain the intermediate-quality petalite concentrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310984178.3A CN116832949A (en) | 2023-08-07 | 2023-08-07 | Method for comprehensively recovering petalite based on grading magnetic separation process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310984178.3A CN116832949A (en) | 2023-08-07 | 2023-08-07 | Method for comprehensively recovering petalite based on grading magnetic separation process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116832949A true CN116832949A (en) | 2023-10-03 |
Family
ID=88170999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310984178.3A Pending CN116832949A (en) | 2023-08-07 | 2023-08-07 | Method for comprehensively recovering petalite based on grading magnetic separation process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116832949A (en) |
-
2023
- 2023-08-07 CN CN202310984178.3A patent/CN116832949A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109351467B (en) | Sorting process for treating maghemia mixed ore based on iron mineral embedded granularity | |
| CN105126993A (en) | Comprehensive recovery process for associated tantalum-niobium ore | |
| CN101439314B (en) | Ore concentration technique for laterite nickel ore rich in nickel and/or cobalt | |
| CN113941433B (en) | Ore dressing method for cascade recovery and segmented tailing discarding of low-grade chromite | |
| CN113769883B (en) | Spodumene ore dressing process | |
| CN109604050B (en) | Environment-friendly titanium selection method for iron-selecting tailings | |
| CN109647616B (en) | Method for comprehensively recovering magnetite and copper minerals from copper slag flotation tailings | |
| CN110624686A (en) | Magnetite beneficiation process capable of fully releasing mill capacity | |
| CN111285405A (en) | Method for separating calcium ferrite and magnesium ferrite from steel slag magnetic separation tailings | |
| CN112452532A (en) | Comprehensive recovery process of low-grade fine-grain niobium-tantalum ore | |
| CN114570515B (en) | Low-grade petalite recovery method | |
| CN108212504A (en) | A kind of method that pre-selection-roasting-magnetic floats technique recycling magnetic tailing | |
| CN114082524A (en) | Method for producing vanadium-titanium-iron ore concentrate and ultrafine-grained-grade titanium ore concentrate | |
| CN105689126A (en) | Mineral processing process for oolitic hematite | |
| CN110961248B (en) | Method for separating scandium and uranium from scandium-containing uranium ore | |
| CN109550587B (en) | Ore dressing process for magnetic red mixed ore | |
| CN110732403A (en) | Beneficiation method for copper smelting furnace slag | |
| CN110694787B (en) | Effective recovery process for associated niobium and tantalum in rare metal ore | |
| CN105964401B (en) | Mineral separation process for high-iron nepheline ore | |
| CN112718231B (en) | Mineral separation method of molybdenite of magnesium-rich mineral | |
| CN116832949A (en) | Method for comprehensively recovering petalite based on grading magnetic separation process | |
| CN115870088A (en) | Method for preparing 4N 5-grade high-purity quartz from pegmatite | |
| CN118060070B (en) | Method for comprehensively recycling lithium tail mud by optimizing magnetic separation process | |
| CN114588998B (en) | Comprehensive utilization method of peganite containing tantalum-niobium, cassiterite, feldspar and spodumene | |
| CN217940462U (en) | Grinding and selecting system for brittle minerals |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |