CN112007748A - Method for sorting bauxite ore - Google Patents
Method for sorting bauxite ore Download PDFInfo
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- CN112007748A CN112007748A CN202010822071.5A CN202010822071A CN112007748A CN 112007748 A CN112007748 A CN 112007748A CN 202010822071 A CN202010822071 A CN 202010822071A CN 112007748 A CN112007748 A CN 112007748A
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- medium
- concentrate
- tailing
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- recycling
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- 229910001570 bauxite Inorganic materials 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000012141 concentrate Substances 0.000 claims abstract description 55
- 238000004064 recycling Methods 0.000 claims abstract description 33
- 239000002002 slurry Substances 0.000 claims abstract description 13
- 230000018044 dehydration Effects 0.000 claims abstract description 9
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 9
- 238000007885 magnetic separation Methods 0.000 claims abstract description 8
- 239000000725 suspension Substances 0.000 claims description 29
- 239000006148 magnetic separator Substances 0.000 claims description 27
- 238000011084 recovery Methods 0.000 claims description 16
- 239000002562 thickening agent Substances 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 10
- 239000000047 product Substances 0.000 claims description 7
- 239000000706 filtrate Substances 0.000 claims description 3
- 238000005406 washing Methods 0.000 description 13
- 230000008569 process Effects 0.000 description 9
- 230000008901 benefit Effects 0.000 description 7
- 238000000926 separation method Methods 0.000 description 7
- 229910052500 inorganic mineral Inorganic materials 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000011707 mineral Substances 0.000 description 5
- 238000012216 screening Methods 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 3
- 229910001648 diaspore Inorganic materials 0.000 description 3
- 238000005188 flotation Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910001569 aluminium mineral Inorganic materials 0.000 description 2
- 239000008235 industrial water Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910000323 aluminium silicate Inorganic materials 0.000 description 1
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000005265 energy consumption Methods 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
- 229910052622 kaolinite Inorganic materials 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 239000003784 tall oil Substances 0.000 description 1
Images
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
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
-
- 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)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
Abstract
The embodiment of the invention discloses a method for sorting bauxite ore, which comprises the following steps: s1, sorting; s2, concentrate medium removal and dehydration and dense medium recycling; s3, removing media and dewatering tailings and recycling heavy media; s4, grading and recycling magnetic separation tailings; s5, concentrating the slurry and recovering the slurry. Meanwhile, the invention has the characteristics of simple sorting method and low processing cost.
Description
Technical Field
The embodiment of the invention relates to the technical field of bauxite industry, in particular to a method for separating bauxite ore.
Background
Bauxite ore in China has poor quality, most of the bauxite ore is diaspore which is difficult to process and high in energy consumption, the reserves of the diaspore account for more than 98% of the total reserves of the whole country, and the deposits suitable for open-pit mining only account for about 34%.
The process of separating a bauxite concentrate from a bauxite ore is, in essence, a process of removing gangue minerals and harmful impurities, separating high-aluminium minerals from low-aluminium minerals to obtain a concentrate with a high aluminium-to-silicon ratio. The main ore dressing methods of bauxite include ore washing, flotation, magnetic separation, chemical ore dressing and the like. Ore washing is the simplest and effective method for improving the aluminum-silicon ratio of bauxite ore, the aluminum-silicon ratio of the ore can be improved by about 2 times through ore washing, and the ore washing is more effective for sorting the qualitatively loose ore. The ore washing is usually combined with other sorting methods to form ore washing (screening and washing), grading and hand-sorting processes. The flotation process can be used for separating diaspore and kaolinite, and is carried out in alkaline medium by using oxidized paraffin soap and tall oil as collecting agent. Magnetic separation is used for separating iron-containing minerals. The chemical ore dressing mainly includes roasting desiliconization, which is based on that the main silicon-containing mineral in the ore is hydrous aluminosilicate, and after roasting, part of the silicon-containing mineral is converted into amorphous silicon oxide particles which are easily dissolved in alkali, so that the aluminum-silicon ratio of the material is improved. Generally, bauxite ore dressing methods are complicated, and a corresponding ore dressing process is selected according to the types and characteristics of ores in the ore dressing process.
At present, bauxite ore in China is subjected to ore separation by a flotation method, the ratio of aluminum to silicon of raw ore can be improved by washing the raw ore with poor mineral quality and low grade, but the existing process for washing the ore has low precision and low unit treatment capacity, and the economic benefit and the improvement of production scale of a bauxite ore washing plant are seriously influenced, so that the technical problem of how to upgrade the existing separation process for bauxite ore to reduce the production cost is urgently needed to be solved at present.
Disclosure of Invention
Therefore, the embodiment of the invention provides a method for sorting bauxite ore, which aims to solve the problem that the economic benefit and the increase of the production scale of a bauxite ore washing plant are restricted due to lower process precision and low unit treatment capacity in the prior art.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
according to an embodiment of the present invention, there is provided a method of sorting bauxite ore, including the steps of:
s1, sorting;
s2, concentrate medium removal and dehydration and dense medium recycling;
s3, removing media and dewatering tailings and recycling heavy media;
s4, grading and recycling magnetic separation tailings;
s5, concentrating the slurry and recovering the slurry.
Further, in step S1, the heavy suspension in the qualified medium bucket is conveyed to the heavy medium cyclone, and the raw ore enters the heavy medium cyclone to be separated into concentrate and tailings.
Further, in step S2, the concentrate enters a concentrate medium-removing dewatering screen for medium-removing dewatering, the concentrate is on the screen, the qualified suspension in the first section below the screen enters a qualified medium bucket for recycling, the dilute suspension in the second section below the screen enters a concentrate magnetic separator for medium recovery, and the selected concentrate enters the qualified medium bucket for recycling.
Further, in step S3, the tailings enter a fixed sieve, oversize materials enter a tailing medium removal dewatering sieve for medium removal and dewatering, and undersize qualified suspension enters a flow divider for flow division; wherein, part of the qualified suspension liquid returns to the qualified medium barrel for recycling; the other part of the qualified suspension enters a tailing magnetic separator; and (4) recovering the medium from the suspension entering the tailing magnetic separator, and recycling the selected magnetic concentrate entering the qualified medium barrel.
Further, in step S3, the material entering the tailing medium-removing dewatering screen is subjected to medium-removing dewatering again, and the qualified suspension liquid at the first section below the tailing medium-removing dewatering screen returns to the qualified medium bucket for recycling; the dilute suspension liquid of the second section under the sieve enters a tailing magnetic separator; the oversize material of the tailing medium-removing dewatering screen is tailing.
Further, in step S4, the first magnetic tailings separated by the concentrate magnetic separator enter the concentrate mud sieve arch and the concentrate mud high-frequency sieve for classification recovery, and the second magnetic tailings separated by the tailings magnetic separator enter the tailings mud sieve arch and the tailings mud high-frequency sieve for classification recovery.
Further, in step S5, the undersize of the arc sieve and the high-frequency sieve of the concentrate mud and the undersize of the arc sieve and the high-frequency sieve of the tailing mud enter a thickener for concentration; the underflow of the thickener is conveyed to the slime filter press by a thickener underflow pump, the dehydration product of the slime filter press is slime, and the filtrate of the slime filter press and the overflow of the thickener are jointly used as circulating water for recycling.
The embodiment of the invention has the following advantages:
the invention provides a method for separating bauxite ore, which is characterized in that a double-section pressureless feeding heavy medium cyclone is applied to realize high-density separation with the average density being more than or equal to 3.0kg/L by using a low-density heavy suspension liquid with the density being less than or equal to 2.0kg/L, and bauxite raw ore is separated into concentrate and abandoned (or used for comprehensive utilization) tailings with high precision; secondly, a tailing fixed sieve, a medium-removing dewatering sieve (comprising a concentrate medium-removing dewatering sieve and a tailing medium-removing dewatering sieve) and a magnetic separator (comprising a concentrate magnetic separator and a tailing magnetic separator) are applied to realize medium-removing dewatering of the selected product and recycling of heavy media; the ore slurry water adopts a thickener to realize closed circulation of washing water, clear water beneficiation and zero discharge of industrial water; the high-frequency sieve (comprising a concentrate mud high-frequency sieve and a tailing mud high-frequency sieve) and a mud filter press are applied to realize the maximum recovery of coarse and fine mud.
The invention provides a method for separating bauxite ore, which comprises the steps of bauxite ore separation, medium removal and dehydration of the selected product including concentrate and tailings, heavy medium recovery and reuse, magnetic separation tailings classification, ore slurry water concentration and ore slurry recovery, and has the advantages of simple steps, low production cost and contribution to improving economic benefit.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so that those skilled in the art can understand and read the present invention, and do not limit the conditions for implementing the present invention, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the functions and purposes of the present invention, should still fall within the scope of the present invention.
FIG. 1 is a schematic diagram of a method of sorting bauxite ore according to an embodiment of the present invention;
in the figure: 1-qualified medium barrel; 2-qualified medium pump; 3-a double-section pressureless feeding dense medium cyclone; 4-concentrate medium-removing dewatering screen; 5-concentrate magnetic separator; 6-arc screening of the concentrate mud; 7-high-frequency screening of the concentrate mud; 8-a tailing fixed sieve; 9-a flow divider; 10-removing medium and dewatering screen for tailings; 11-tailing magnetic separator; 12-a tailing mud sieve bend; 13-high-frequency screening of tailing mud; 14-a thickener; 15-thickener underflow pump; 16-slime filter press.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1, an embodiment of the present invention provides a method of sorting bauxite ore, including the steps of:
s1, sorting: the heavy suspension in the qualified medium barrel 1 is pressurized by a qualified medium pump 2 and then is conveyed to a double-section non-pressure feeding heavy medium cyclone 3, and raw ore enters the double-section non-pressure feeding heavy medium cyclone 3 in a self-weight mode to be separated into concentrate and tailings;
s2, concentrate medium removal and dehydration and dense medium recycling: the separated concentrate enters a concentrate medium-removing dewatering screen 4 for medium-removing dewatering, concentrate is on the screen, the qualified suspension in the first section below the screen enters a qualified medium barrel 1 for recycling, the dilute suspension in the second section below the screen enters a concentrate magnetic separator 5 for medium recovery, and the separated concentrate enters the qualified medium barrel 1 for recycling;
s3, removing media and dewatering tailings and recycling heavy media: tailings enter a tailing fixed sieve 8, oversize materials enter a tailing medium removal dewatering sieve 10 for medium removal and dewatering, and undersize qualified suspension enters a flow divider 9 for flow division; wherein, part of the qualified suspension liquid returns to the qualified medium barrel 1 for recycling; the other part of qualified suspension liquid enters a tailing magnetic separator 11;
the material entering the tailing medium-removing dewatering screen 10 is subjected to medium-removing dewatering again, and the qualified suspension liquid at the first section below the tailing medium-removing dewatering screen 10 returns to the qualified medium barrel 1 for recycling; the dilute suspension liquid of the second section under the screen enters a tailing magnetic separator 11; the oversize material of the tailing medium-removing dewatering screen 10 is tailing.
The suspension liquid entering the tailing magnetic separator 11 is subjected to medium recovery by the tailing magnetic separator 11, and the selected magnetic concentrate enters the qualified medium barrel 1 for recycling;
s4, grading and recycling magnetic separation tailings: the first magnetic tailings selected by the concentrate magnetic separator 5 enter a concentrate mud sieve bend 6 and a concentrate mud high-frequency sieve 7 for grading recovery, and the second magnetic tailings selected by the tailings magnetic separator 11 enter a tailings mud sieve bend 12 and a tailings mud high-frequency sieve 13 for grading recovery;
s5, concentrating and recycling the slurry: the screen water of the concentrate mud sieve bend 6 and the concentrate mud high-frequency screen 7 and the screen water of the tailing mud sieve bend 12 and the tailing mud high-frequency screen 13 enter a thickener 14 for concentration; the underflow of the thickener 14 is pumped to a slime filter press 16 by a thickener underflow pump 15, the dehydration product of the slime filter press 16 is slime, and the filtrate of the slime filter press 16 and the overflow of the thickener 14 are jointly used as circulating water for recycling.
The scheme of the invention comprises the steps of bauxite ore separation, the product after the bauxite ore separation comprises concentrate, the de-medium dehydration of tailings and the recovery and reuse of heavy media, the classification of magnetic separation tailings, the concentration of slurry water and the recovery of slurry, the steps are simple, the production cost is low, and the economic benefit is improved; in addition, a double-section non-pressure feeding heavy medium cyclone is used for realizing high-density separation with the average density of more than or equal to 3.0kg/L by using a low-density heavy suspension liquid with the density of less than or equal to 2.0kg/L, and bauxite raw ores are separated into concentrate and abandoned (or used for comprehensive utilization) tailings with high precision; secondly, a tailing fixed sieve, a medium-removing dewatering sieve (comprising a concentrate medium-removing dewatering sieve and a tailing medium-removing dewatering sieve) and a magnetic separator (comprising a concentrate magnetic separator and a tailing magnetic separator) are applied to realize medium-removing dewatering of the selected product and recycling of heavy media; the ore slurry water adopts a thickener to realize closed circulation of washing water, clear water beneficiation and zero discharge of industrial water; the high-frequency sieve (comprising a concentrate mud high-frequency sieve and a tailing mud high-frequency sieve) and a mud filter press are applied to realize the maximum recovery of coarse and fine mud.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (7)
1. A method for sorting bauxite ore, characterized by comprising the steps of:
s1, sorting;
s2, concentrate medium removal and dehydration and dense medium recycling;
s3, removing media and dewatering tailings and recycling heavy media;
s4, grading and recycling magnetic separation tailings;
s5, concentrating the slurry and recovering the slurry.
2. The method for sorting bauxite ore according to claim 1, wherein in step S1, the heavy suspension in the qualified media bucket is conveyed to a heavy media cyclone, and the raw ore enters the heavy media cyclone to be sorted into concentrate and tailings.
3. The method for sorting bauxite ore according to claim 2, wherein in step S2, the concentrate enters a concentrate medium-removing dewatering screen for medium-removing dewatering, the concentrate is on the screen, the qualified suspension in the first section below the screen enters a qualified medium bucket for recycling, the dilute suspension in the second section below the screen enters a concentrate magnetic separator for medium recovery, and the sorted concentrate enters a qualified medium bucket for recycling.
4. The method for sorting bauxite ore according to claim 3, wherein in step S3, the tailings enter a fixed sieve, oversize materials enter a tailing medium removal dewatering sieve for medium removal and dewatering, and undersize qualified suspension enters a flow divider for flow division; wherein, part of the qualified suspension liquid returns to the qualified medium barrel for recycling; the other part of the qualified suspension enters a tailing magnetic separator; and (4) recovering the medium from the suspension entering the tailing magnetic separator, and recycling the selected magnetic concentrate entering the qualified medium barrel.
5. The method for sorting bauxite ore according to claim 4, wherein in step S3, the material entering the tailing medium-removing dewatering screen is subjected to medium-removing dewatering again, and the qualified suspension liquid at the first section below the tailing medium-removing dewatering screen is returned to the qualified medium bucket for recycling; the dilute suspension liquid of the second section under the sieve enters a tailing magnetic separator; the oversize material of the tailing medium-removing dewatering screen is tailing.
6. The method for separating bauxite ore of claim 5, wherein in step S4, the first magnetic tailings separated by the concentrate magnetic separator enter the concentrate mud sieve arch and the concentrate mud high frequency sieve for classification recovery, and the second magnetic tailings separated by the tailings magnetic separator enter the tailings mud sieve arch and the tailings mud high frequency sieve for classification recovery.
7. The method for sorting bauxite ore according to claim 6, wherein in step S5, the undersize of the concentrate mud sieve arch and the concentrate mud high-frequency sieve and the undersize of the tailing mud sieve arch and the tailing mud high-frequency sieve are concentrated together in a thickener; the underflow of the thickener is conveyed to the slime filter press by a thickener underflow pump, the dehydration product of the slime filter press is slime, and the filtrate of the slime filter press and the overflow of the thickener are jointly used as circulating water for recycling.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010822071.5A CN112007748A (en) | 2020-08-15 | 2020-08-15 | Method for sorting bauxite ore |
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| CN202010822071.5A CN112007748A (en) | 2020-08-15 | 2020-08-15 | Method for sorting bauxite ore |
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