CN108672103B - Bauxite settling type flotation equipment and sorting method - Google Patents
Bauxite settling type flotation equipment and sorting method Download PDFInfo
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- CN108672103B CN108672103B CN201810687799.4A CN201810687799A CN108672103B CN 108672103 B CN108672103 B CN 108672103B CN 201810687799 A CN201810687799 A CN 201810687799A CN 108672103 B CN108672103 B CN 108672103B
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- 238000005188 flotation Methods 0.000 title claims abstract description 61
- 229910001570 bauxite Inorganic materials 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000033558 biomineral tissue development Effects 0.000 claims abstract description 51
- 238000000926 separation method Methods 0.000 claims abstract description 33
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 29
- 239000011707 mineral Substances 0.000 claims abstract description 29
- 238000004062 sedimentation Methods 0.000 claims abstract description 25
- 239000006260 foam Substances 0.000 claims abstract description 24
- 239000007921 spray Substances 0.000 claims abstract description 23
- 230000001089 mineralizing effect Effects 0.000 claims abstract description 22
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 239000002002 slurry Substances 0.000 claims description 7
- 238000005507 spraying Methods 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 238000013461 design Methods 0.000 abstract description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 16
- 239000012141 concentrate Substances 0.000 description 14
- 238000011084 recovery Methods 0.000 description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 238000004131 Bayer process Methods 0.000 description 4
- 229910052681 coesite Inorganic materials 0.000 description 4
- 229910052593 corundum Inorganic materials 0.000 description 4
- 229910052906 cristobalite Inorganic materials 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 229910052682 stishovite Inorganic materials 0.000 description 4
- 229910052905 tridymite Inorganic materials 0.000 description 4
- 229910001845 yogo sapphire Inorganic materials 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000002000 scavenging effect Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000011362 coarse particle Substances 0.000 description 2
- 229910001648 diaspore Inorganic materials 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052900 illite Inorganic materials 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 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
- 238000012423 maintenance Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- VGIBGUSAECPPNB-UHFFFAOYSA-L nonaaluminum;magnesium;tripotassium;1,3-dioxido-2,4,5-trioxa-1,3-disilabicyclo[1.1.1]pentane;iron(2+);oxygen(2-);fluoride;hydroxide Chemical compound [OH-].[O-2].[O-2].[O-2].[O-2].[O-2].[F-].[Mg+2].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[K+].[K+].[K+].[Fe+2].O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2 VGIBGUSAECPPNB-UHFFFAOYSA-L 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/02—Froth-flotation processes
-
- 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
- B03D1/14—Flotation machines
- B03D1/1443—Feed or discharge mechanisms for flotation tanks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; specified applications
- B03D2203/02—Ores
- B03D2203/04—Non-sulfide ores
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biotechnology (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses bauxite sedimentation type flotation equipment which comprises an ore pulp distributor, a mineralizer, a mineralization nozzle, a mineralization pipe, a tank body, an inner cone, an outer cone, a foam tank, a foam outlet pipe, an underflow pipe, a middling pipe and an air inlet pipe; the mineralizing device, the mineralizing spray head and the mineralizing pipe are connected to form a mineralizing system of the equipment; the tank body and the inner cone are connected to form a flotation separation system of the equipment; the inner cone and the outer cone form a settling separation system of the equipment; the tank body and the foam tank form a foam discharging system of the equipment. The invention changes the arrangement of a mineralization system of a non-transmission flotation tank, and forms the plane annular arrangement and the vertical surface step arrangement of the mineralization system; through the design of the sedimentation system, the sedimentation system is introduced into the bauxite flotation process, so that the flotation probability of coarse-grained minerals is improved.
Description
Technical Field
The invention relates to bauxite flotation separation equipment and method, in particular to bauxite flotation separation equipment and method based on different bauxite sedimentation properties.
Background
The process technology for producing alumina by mineral dressing-Bayer process is an important technical route for reasonably utilizing low-grade bauxite at present. By the flotation method, the useful minerals required by the production of the alumina are enriched, and the grade of the ores entering the production of the alumina is improved. The bauxite floatation method realizes separation according to different interface properties of useful minerals and gangue minerals. In the bauxite flotation process, under the action of a medicament, diaspore with better dissociation is adhered to the surface of the bubble due to better hydrophobicity, rises along with the bubble and floats to a foam layer to be discharged as concentrate; gangue minerals with poor hydrophobicity cannot be captured by air bubbles and are discharged from the underflow.
The majority of Chinese bauxite is diasporic bauxite, the main useful mineral is diasporic bauxite, and the main gangue mineral is illite and kaolinite. Because diaspore has a higher hardness than gangue minerals, the bauxite grinding product has a higher content of useful minerals in the coarse fraction material and a higher content of gangue minerals in the fine fraction material. The coarse fraction materials settle faster in the flotation process, resulting in high grade of tailing products and low recovery rate of useful minerals.
With the increasing demand of the human society for metals, the ore grade is rapidly reduced, the processing amount of the selected ore is increasingly increased in order to obtain useful minerals, and the research and development of large-scale flotation equipment become an international trend. The large-scale flotation equipment is beneficial to the arrangement of an automatic instrument, and the floor area of the flotation equipment is reduced. Along with the development of large-scale flotation equipment, the energy consumption of the flotation equipment per unit volume is reduced, the maintenance cost is reduced, and the labor cost is also greatly reduced. However, as the size of the flotation equipment increases, the flotation process has problems, mainly manifested by problems of difficulty in floating coarse particles due to a higher column, a decrease in the recovery rate of coarse minerals, difficulty in fully utilizing the space in the flotation tank, and the like.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides bauxite sedimentation type separation equipment and a separation method.
The technical scheme is as follows: in order to achieve the purpose, the invention adopts the technical scheme that:
a bauxite sedimentation type flotation device comprises an ore pulp distributor, a mineralizer, a mineralization spray head, a mineralization pipe, a tank body, an inner cone, an outer cone, a foam tank, a foam outlet pipe, an underflow pipe, a middling pipe and an air inlet pipe; the mineralizing device, the mineralizing spray head and the mineralizing pipe are connected to form a mineralizing system of the equipment; the tank body and the inner cone are connected to form a flotation separation system of the equipment; the inner cone and the outer cone form a settling separation system of the equipment; the tank body and the foam tank form a foam discharging system of the equipment.
The mineralization system is connected with the ore pulp distributor and is arranged in a multi-ring shape from inside to outside on the plane of the tank body; the mineralization system is arranged on the vertical surface of the tank body in 3-stage steps.
Wherein, the mineralization system is 1 in the center of the tank body, and the outer layer is arranged in 6-12 rings.
Wherein the mineralization nozzle sprays upwards in a direction which forms an angle of 15-45 degrees with the horizontal plane.
The inner cone and the outer cone form a settling separation system of the equipment, the middling pipe is positioned at the bottom of the outer cone, and the underflow pipe is positioned at the middle upper part of the outer cone;
wherein, the bottom of the inner cone is provided with a through hole.
A separation method of bauxite sedimentation type flotation equipment comprises the following steps:
a. the ore pulp fed by the slurry pump is fed into the ore pulp distributor at the feeding pressure of 0.25-0.45 Mpa, the high-pressure ore pulp is fully mixed with the compressed air entering through the air inlet pipe in the mineralizing device, the mineralizing pipe and the mineralizing nozzle, and the air is cut into bubbles.
b. The slurry containing air bubbles, water and bauxite is injected into the flotation separation system in an upward injection manner.
c. In the flotation separation system, minerals with better hydrophobicity rise with bubbles to enter the foam discharge system and are discharged through the foam outlet pipe.
d. And the ore pulp with weaker hydrophobicity enters a sedimentation separation system through a through hole at the lower part of the inner cone, sedimentation is carried out in the sedimentation separation system, coarse-grain ore pulp with better sedimentation performance returns to the feeding pump through the middling pipe and returns to the mineralization system again, and fine-grain minerals with weaker sedimentation performance are discharged as tailings through the underflow pipe.
Compared with the prior art, the invention has the following beneficial effects:
1. after being distributed by the ore pulp distributor, the mineralized bauxite pulp is uniformly sprayed into the flotation tank body, so that the space in the flotation tank body can be fully utilized.
2. The step arrangement of the mineralization system improves the secondary enrichment probability of ore pulp and improves the flotation recovery rate.
3. The flotation ore pulp is separated from tailings and middlings in a sedimentation mode, the coarse-grained minerals are preferentially settled under the action of gravity and enter the mineralization system again for mineralization, the flotation probability of the coarse-grained high-grade ores is improved, and the bauxite flotation tailing grade is reduced.
The invention changes the arrangement of a mineralization system of a non-transmission flotation tank, and forms the plane annular arrangement and the vertical surface step arrangement of the mineralization system; the spraying direction of the ore pulp in the tank body is changed, so that the floating of coarse particles is facilitated; through the design of the sedimentation system, the sedimentation system is introduced into the bauxite flotation process, so that the flotation probability of coarse-grained minerals is improved. The invention provides large-scale flotation equipment and method with stable operation, large treatment capacity, good selectivity and low tailing grade for bauxite beneficiation.
Drawings
FIG. 1 is a schematic structural view of an inventive bauxite settling flotation plant;
fig. 2 is a top view of a bauxite settling flotation plant.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, bauxite sedimentation type flotation equipment comprises an ore pulp distributor 1, a mineralizer 2, a mineralization nozzle 3, a mineralization pipe 4, a tank body 5, an inner cone 6, an outer cone 7, a foam tank 8, a foam outlet pipe 9, an underflow pipe 10, a middling pipe 11 and an air inlet pipe 12; the mineralizing device 2, the mineralizing spray head 3 and the mineralizing pipe 4 are connected to form a mineralizing system of the equipment; the tank body 5 and the inner cone 6 are connected to form a flotation separation system of the equipment; the inner cone 6 and the outer cone 7 form a settling separation system of the equipment; the tank body 5 and the foam tank 8 form a foam discharging system of the equipment; the underflow pipe (10) is positioned at the middle upper part of the outer cone (7), and the middling pipe (11) is positioned at the bottom of the outer cone (7).
According to the figure 1, the arrangement of the mineralization system is described in detail, the mineralization system is connected with the ore pulp distributor 1, the mineralization system is distributed in a ring shape from inside to outside in the plane of the trough body 3, the mineralization system is divided into three layers in the figure, the center is provided with one, the six middle groups are distributed in a ring shape, and the 12 outermost groups are distributed in a ring shape; the mineralization system is arranged in 3 grades of steps on the vertical surface of the tank body 5, the position of the middle mineralization spray head 3 is the lowest, the position of the middle mineralization spray head 3 is in the middle, and the position of the outer mineralization spray head 3 is the highest. The spraying direction of the mineralization spray head is upward spraying, and the included angle between the mineralization spray head and the horizontal plane is 15 degrees.
Referring to fig. 1, the settling system is described in detail, and the inner cone 6 and the outer cone 7 form the settling system, and the underflow pipe and the middling pipe are connected to the middle upper part and the bottom part of the settling system respectively.
A separation method of bauxite sedimentation type flotation equipment is realized by the following steps:
firstly, feeding pulp into a pulp distributor 1 by a slurry pump at a feeding pressure of 0.25-0.45 Mpa, fully mixing high-pressure pulp with compressed air entering through an air inlet pipe 12 in a mineralizer 2, a mineralizer pipe 4 and a mineralizer nozzle 3, and cutting the air into bubbles; the ore pulp containing air bubbles, water and bauxite is sprayed into a flotation separation system in an upward spraying mode; in the flotation separation system, mineral particles with good hydrophobicity rise along with bubbles to enter a foam discharge system and are discharged through a foam outlet pipe 9; the ore pulp with weak hydrophobicity is settled in a settling separation system, the coarse-grain ore pulp with good settling property returns to a feeding pump through a middling pipe 11 and returns to a mineralization system for mineralization again, and the fine-grain minerals with weak settling property are discharged through an underflow pipe 10 as tailings. The invention is further illustrated below with reference to specific use examples:
the chemical full-element analysis results of low-grade bauxite in Henan as an industrial production raw material are shown in Table 1.
TABLE 1 analysis results of chemical all elements (%) -for a certain low-grade bauxite in Henan
| Chemical composition | Al2O3 | SiO2 | Fe2O3 | TiO2 | K2O | Na2O | CaO | MgO | Burn and relieve |
| Content (wt.) | 56.43 | 15.32 | 8.16 | 2.94 | 1.36 | 0.041 | 0.12 | 0.32 | 14.55 |
In the process of ore dressing of a certain low-grade bauxite in Henan, the ore discharge amount is 60t/h, the raw ore is subjected to closed circuit grinding by a first-stage ball mill, the ore pulp with the overflow fineness of-0.075 mm accounting for 89.86% and the concentration of 29.35% directly enters phi 6m sedimentation type flotation equipment for flotation and desilicification after the action of a flotation reagent in a raw ore pulp stirring barrel. The mineral with better hydrophobicity is taken as concentrate in a flotation separation system and is discharged through a foam outlet pipe; the ore pulp with weak hydrophobicity is settled in a settling separation system, coarse-grain ore pulp with good settling property is recycled as middlings, and fine-grain minerals with weak settling property are discharged as tailings through an underflow pipe.
Example 1:
feeding the ore pulp into a sedimentation type flotation device by a slurry pump at the feeding pressure of 0.25Mpa, wherein a mineralization system of the device is divided into three layers from inside to outside and annularly distributed in a tank body, the center of the mineralization system is 1, the middle of the mineralization system is 6, and the outermost layer of the mineralization system is 12; the mineralized spray head sprays upwards in the direction with an included angle of 15 degrees with the horizontal direction. The ore pulp passing through the sedimentation type flotation equipment is subjected to the flotation process flows of primary roughing, primary concentrating and primary scavenging to obtain the indexes as shown in the following table 2:
table 2 example 1 results of mineral separation and desilication (%)
| Sample name | Al2O3 | SiO2 | A/S | Yield of | Recovery rate of alumina |
| Raw ore | 56.35 | 15.42 | 3.65 | 100.00 | 100.00 |
| Concentrate ore | 64.58 | 8.62 | 7.49 | 70.00 | 80.22 |
| Tailings | 37.15 | 31.28 | 1.19 | 30.00 | 19.78 |
As can be seen from table 2, in example 1, on the premise that the concentrate grade meets the requirement of producing alumina raw material by the bayer process, the concentrate yield is 70%, the alumina recovery rate is 80.22%, and the concentrate particle size is-0.075 mm which accounts for 84.62%, so that the flotation probability of coarse-grained minerals is obviously improved compared with the selected raw ore.
Example 2:
feeding the ore pulp into a sedimentation type flotation device by a slurry pump at the feeding pressure of 0.35Mpa, wherein a mineralization system of the device is divided into three layers from inside to outside and annularly distributed in a tank body, the center of the mineralization system is 1, the middle of the mineralization system is 7, and the outermost layer of the mineralization system is 11; the mineralized spray head sprays upwards in the direction with an included angle of 30 degrees with the horizontal direction. The ore pulp passing through the sedimentation type flotation equipment is subjected to the flotation process flows of primary roughing, primary concentrating and primary scavenging to obtain the indexes as shown in the following table 3:
table 3 example 2 results of mineral separation and desilication (%)
| Sample name | Al2O3 | SiO2 | A/S | Yield of | Recovery rate of alumina |
| Raw ore | 56.69 | 15.16 | 3.74 | 100.00 | 100.00 |
| Concentrate ore | 64.96 | 8.52 | 7.63 | 70.29 | 80.55 |
| Tailings | 37.12 | 30.88 | 1.20 | 29.71 | 19.45 |
As can be seen from Table 3, in example 2, on the premise that the concentrate grade meets the requirement of producing alumina raw material by the Bayer process, the concentrate yield is 70.29%, the alumina recovery rate is 80.55%, and the concentrate granularity of-0.075 mm accounts for 83.98%.
Example 3:
feeding the ore pulp into a sedimentation type flotation device by a slurry pump at the feeding pressure of 0.45Mpa, wherein a mineralization system of the device is divided into three layers from inside to outside and annularly distributed in a tank body, the center of the mineralization system is 1, the middle of the mineralization system is 8, and the outermost layer of the mineralization system is 10; the mineralized spray head sprays upwards in a direction with an included angle of 45 degrees with the horizontal direction. The ore pulp passing through the sedimentation type flotation equipment is subjected to the flotation process flows of primary roughing, primary concentrating and primary scavenging to obtain the indexes as shown in the following table 4:
table 4 example 3 results of mineral separation and desilication (%)
| Sample name | Al2O3 | SiO2 | A/S | Yield of | Recovery rate of alumina |
| Raw ore | 56.45 | 15.34 | 3.68 | 100.00 | 100.00 |
| Concentrate ore | 64.72 | 8.37 | 7.73 | 70.11 | 80.38 |
| Tailings | 37.05 | 31.68 | 1.17 | 29.89 | 19.62 |
As can be seen from Table 4, in example 3, on the premise that the concentrate grade meets the requirement of producing alumina raw material by the Bayer process, the concentrate yield is 70.11%, the alumina recovery rate is 80.38%, and the concentrate granularity is-0.075 mm and accounts for 84.35%.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention. It should be noted that other equivalent modifications can be made by those skilled in the art in light of the teachings of the present invention, and all such modifications can be made as are within the scope of the present invention.
Claims (2)
1. The utility model provides a bauxite subsides formula flotation equipment which characterized in that: comprises an ore pulp distributor (1), a mineralizer (2), a mineralized spray nozzle (3), a mineralized pipe (4), a tank body (5), an inner cone (6), an outer cone (7), a foam tank (8), a foam outlet pipe (9), an underflow pipe (10), a middling pipe (11) and an air inlet pipe (12); the mineralizing device (2), the mineralizing spray head (3) and the mineralizing pipe (4) are connected to form a mineralizing system of the equipment; the tank body (5) and the inner cone (6) are connected to form a flotation separation system of the equipment; the inner cone (6) and the outer cone (7) form a settling separation system of the equipment; the tank body (5) and the foam tank (8) form a foam discharging system of the equipment; the underflow pipe (10) and the middling pipe (11) are respectively positioned at the middle upper part and the bottom of the outer cone (7); the mineralization system is connected with the ore pulp distributor (1) and is arranged in a multi-ring shape from inside to outside on the plane of the tank body (5); the mineralization system is arranged in 3-stage step arrangement on the vertical surface of the tank body (5), the position of the middle mineralization spray head is the lowest, the position of the middle mineralization spray head is in the middle, and the position of the outer mineralization spray head is the highest; the mineralization system is arranged in the center of the tank body (5) in a ring shape with 6-12 outer layers; the spraying direction of the mineralization spray head is obliquely upward spraying, and the included angle between the mineralization spray head and the horizontal plane is 15-45 degrees; the inner cone (6) and the outer cone (7) form a sedimentation separation system of the equipment, the middling pipe (11) is the bottom of the outer cone, and the underflow pipe (10) is positioned at the middle upper part of the outer cone (7); the bottom of the inner cone (6) is provided with a through hole.
2. A separation method using the bauxite settling-type flotation apparatus described in claim 1, characterized in that: the method comprises the following steps:
a. the ore pulp fed by the slurry pump is fed into the ore pulp distributor (1) under the feeding pressure of 0.25-0.45 Mpa, the high-pressure ore pulp is fully mixed with the compressed air entering through the air inlet pipe (12) in the mineralizing device (2), the mineralizing pipe (4) and the mineralizing nozzle (3), and the air is cut into bubbles;
b. the ore pulp containing air bubbles, water and bauxite is sprayed into a flotation separation system in an inclined upward spraying mode;
c. in the flotation separation system, mineral particles with better hydrophobicity rise along with bubbles to enter a foam discharge system and are discharged through a foam outlet pipe (9);
d. the mineral particles with weak hydrophobicity are settled in the settling separation system, coarse-grain ore pulp with good settling performance returns to the feeding pump through the middling pipe (11) and returns to the mineralization system again, and fine-grain minerals with weak settling performance are discharged through the tailing pipe (10) as tailings.
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| CN107362911A (en) * | 2017-09-04 | 2017-11-21 | 中煤（天津）洗选科技有限公司 | Jet micro-bubble flotation machine |
| CN107377235A (en) * | 2017-08-11 | 2017-11-24 | 石磊 | Spraying cycle formula flotation column |
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